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Home >> Toyota >> 2017 >> Highlander SE, FWD >> Repair and Diagnosis >> Restraints >> Air Bag, SRS >> Supplemental Restraint System - Diagnostic Codes & Circuit Tests - (Except Hybrid) >> Airbag System >> DTC B1660-43: Passenger Airbag ON/OFF Indicator Circuit Malfunction [12/2013 - ] >> Procedure

DTC B1660-43: Passenger Airbag ON/OFF Indicator Circuit Malfunction [12/2013 - ]: Procedure

  1. CHECK PASSENGER AIRBAG ON/OFF INDICATOR CONDITION 
    1. Turn the ignition switch to ON.
    2. Check the passenger airbag ON/OFF indicator operation.

      HINT: 

      Refer to the normal condition of the passenger airbag ON/OFF indicator.

      Refer to DIAGNOSIS SYSTEM [12/2013 - ]

      Result

      Result Proceed to
      ON/OFF Indicator illumination is always "ON". A
      ON/OFF Indicator illumination is always "OFF". B

    Result:  2

    B 

    See step  17

    Result:  1

    A 

    See step  2

  2. CHECK CONNECTORS 
    1. Turn the ignition switch off.
    2. Disconnect the cable from the negative (-) battery terminal.
      WARNING:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

    3. Check that the connectors are properly connected to the airbag sensor assembly, clock assembly and instrument panel junction block assembly. Also check that the connectors that link the No. 4 instrument panel wire and instrument panel wire are properly connected.

      OK

      The connectors are properly connected.

      HINT: 

      If the connectors are not properly connected, reconnect the connectors and proceed to the next inspection.

    4. Disconnect the connectors from the airbag sensor assembly, clock assembly and instrument panel junction block assembly. Also disconnect the connectors that link the No. 4 instrument panel wire and instrument panel wire.
    5. Check that the terminals of the connectors are not damaged.

      OK

      The terminals are not deformed or damaged.

      Result

      Proceed to
      OK
      NG

    Result:  2

    NG 

    REPLACE WIRE HARNESS 

    Result:  1

    OK 

    See step  3

  3. CHECK PASSENGER AIRBAG ON/OFF INDICATOR 
    1. Connect the connector to the clock assembly and instrument panel junction block assembly. Also connect the connectors that link the No. 4 instrument panel wire and instrument panel wire.
    2. Connect the cable to the negative (-) battery terminal.
    3. Turn the ignition switch to ON.
    4. Check the passenger airbag ON/OFF indicator operation.

      OK

      The passenger airbag ON/OFF indicator does not come on.

      Result

      Proceed to
      OK
      NG

    Result:  2

    NG 

    See step  5

    Result:  1

    OK 

    See step  4

  4. CHECK DTC 
    1. Turn the ignition switch off.
      GTY430757Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Instrument Panel Junction Block Assembly
      *2 Airbag Sensor Assembly
      *3 Clock Assembly
    2. Disconnect the cable from the negative (-) battery terminal.
      WARNING:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

    3. Connect the connector to the airbag sensor assembly.
    4. Connect the cable to the negative (-) battery terminal.
    5. Clear the DTCs stored in memory.

      Refer to DTC CHECK / CLEAR [12/2013 - ]

      Body Electrical > SRS Airbag > Clear DTCs 

    6. Turn the ignition switch off.
    7. Turn the ignition switch to ON, and wait for at least 60 seconds.
    8. Check for DTCs.

      Refer to DTC CHECK / CLEAR [12/2013 - ]

      Body Electrical > SRS Airbag > Trouble Codes 

      OK

      DTC B1660-43 is not output.

      HINT: 

      Codes other than DTC B1660-43 may be output at this time, but they are not related to this check.

      Result

      Proceed to
      OK
      NG

    Result:  1

    OK 

    USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [12/2013 - 11/2016]  Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [11/2016 - ] 

    Result:  2

    NG 

    REPLACE AIRBAG SENSOR ASSEMBLY. Refer to  REMOVAL [12/2013 - ] 

  5. CHECK WIRE HARNESS (OPEN) 
    1. Turn the ignition switch off.
      GTY425743Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Instrument Panel Junction Block Assembly
      *2 Airbag Sensor Assembly
      *3 Clock Assembly
      *4 Service Wire
      *a Front view of wire harness connector
      (to Airbag Sensor Assembly)
      *b Front view of wire harness connector
      (to Clock Assembly)
    2. Disconnect the cable from the negative (-) battery terminal.
      WARNING:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

    3. Disconnect the connector from the clock assembly.
    4. Using a service wire, connect terminals 23 (PAON) and 17 (P-AB) of connector B.
      NOTE:

      Do not forcibly insert the service wire into the terminals of the connector when connecting the wire.

    5. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      G7-16 (PAON) - G7-15 (P-AB) Always Below 1 Ω
    6. Disconnect the service wire from connector B.

      Result

      Proceed to
      OK
      NG

    Result:  2

    NG 

    See step  15

    Result:  1

    OK 

    See step  6

  6. CHECK WIRE HARNESS (SHORT) 
    1. Measure the resistance according to the value(s) in the table below.
      GTY449706Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Instrument Panel Junction Block Assembly
      *2 Airbag Sensor Assembly
      *3 Clock Assembly
      *a Front view of wire harness connector
      (to Clock Assembly)

      Standard Resistance

      Tester Connection Condition Specified Condition
      G7-16 (PAON) - G7-15 (P-AB) Always 1 MΩ or higher

      Result

      Proceed to
      OK
      NG

    Result:  2

    NG 

    See step  13

    Result:  1

    OK 

    See step  7

  7. CHECK WIRE HARNESS (SHORT TO B+) 
    1. Connect the cable to the negative (-) battery terminal.
      GTY449706Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Instrument Panel Junction Block Assembly
      *2 Airbag Sensor Assembly
      *3 Clock Assembly
      *a Front view of wire harness connector
      (to Clock Assembly)
    2. Turn the ignition switch to ON.
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      G7-16 (PAON) - Body ground Ignition switch ON Below 1 V
      G7-15 (P-AB) - Body ground Ignition switch ON Below 1 V
    4. Turn the ignition switch off.
    5. Disconnect the cable from the negative (-) battery terminal.
      WARNING:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

      Result

      Proceed to
      OK
      NG

    Result:  2

    NG 

    See step  11

    Result:  1

    OK 

    See step  8

  8. CHECK WIRE HARNESS (SHORT TO GROUND) 
    1. Measure the resistance according to the value(s) in the table below.
      GTY449706Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Instrument Panel Junction Block Assembly
      *2 Airbag Sensor Assembly
      *3 Clock Assembly
      *a Front view of wire harness connector
      (to Clock Assembly)

      Standard Resistance

      Tester Connection Condition Specified Condition
      G7-16 (PAON) - Body ground Always 1 MΩ or higher
      G7-15 (P-AB) - Body ground Always 1 MΩ or higher

      Result

      Proceed to
      OK
      NG

    Result:  1

    OK 

    REPLACE CLOCK ASSEMBLY. Refer to  REMOVAL [12/2013 - ] 

    Result:  2

    NG 

    See step  9

  9. CHECK NO. 4 INSTRUMENT PANEL WIRE (SHORT TO GROUND) 
    1. Disconnect the No. 4 instrument panel wire connector from the instrument panel wire.
      GTY428548Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Instrument Panel Junction Block Assembly
      *2 Airbag Sensor Assembly
      *3 Clock Assembly
      *4 Instrument Panel Wire
      *5 No. 4 Instrument Panel Wire
      *a Front view of wire harness connector
      (to Clock Assembly)
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      G7-16 (PAON) - Body ground Always 1 MΩ or higher
      G7-15 (P-AB) - Body ground Always 1 MΩ or higher

      Result

      Proceed to
      OK
      NG

    Result:  2

    NG 

    REPLACE NO. 4 INSTRUMENT PANEL WIRE 

    Result:  1

    OK 

    See step  10

  10. CHECK INSTRUMENT PANEL WIRE (SHORT TO GROUND) 
    1. Disconnect the connector from the instrument panel junction block assembly.
      GTY433252Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Instrument Panel Junction Block Assembly
      *2 Airbag Sensor Assembly
      *3 Clock Assembly
      *4 Instrument Panel Wire
      *5 No. 4 Instrument Panel Wire
      *a Front view of wire harness connector
      (to Instrument Panel Junction Block Assembly)
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      4A-25 (PAON) - Body ground Always 1 MΩ or higher
      4A-23 (PAON) - Body ground Always 1 MΩ or higher
      4A-26 (P-AB) - Body ground Always 1 MΩ or higher
      4A-44 (P-AB) - Body ground Always 1 MΩ or higher

      Result

      Proceed to
      OK
      NG

    Result:  1

    OK 

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY 

    Result:  2

    NG 

    REPLACE INSTRUMENT PANEL WIRE 

  11. CHECK NO. 4 INSTRUMENT PANEL WIRE (SHORT TO B+) 
    1. Disconnect the No. 4 instrument panel wire connector from the instrument panel wire.
      GTY428548Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Instrument Panel Junction Block Assembly
      *2 Airbag Sensor Assembly
      *3 Clock Assembly
      *4 Instrument Panel Wire
      *5 No. 4 Instrument Panel Wire
      *a Front view of wire harness connector
      (to Clock Assembly)
    2. Connect the cable to the negative (-) battery terminal.
    3. Turn the ignition switch to ON.
    4. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      G7-16 (PAON) - Body ground Ignition switch ON Below 1 V
      G7-15 (P-AB) - Body ground Ignition switch ON Below 1 V
    5. Turn the ignition switch off.
    6. Disconnect the cable from the negative (-) battery terminal.
      WARNING:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

      Result

      Proceed to
      OK
      NG

    Result:  2

    NG 

    REPLACE NO. 4 INSTRUMENT PANEL WIRE 

    Result:  1

    OK 

    See step  12

  12. CHECK INSTRUMENT PANEL WIRE (SHORT TO B+) 
    1. Disconnect the connector from the instrument panel junction block assembly.
      GTY433252Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Instrument Panel Junction Block Assembly
      *2 Airbag Sensor Assembly
      *3 Clock Assembly
      *4 Instrument Panel Wire
      *5 No. 4 Instrument Panel Wire
      *a Front view of wire harness connector
      (to Instrument Panel Junction Block Assembly)
    2. Measure the voltage according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      4A-25 (PAON) - Other terminals Always 1 MΩ or higher
      4A-23 (PAON) - Other terminals Always 1 MΩ or higher
      4A-26 (P-AB) - Other terminals Always 1 MΩ or higher
      4A-44 (P-AB) - Other terminals Always 1 MΩ or higher

      Result

      Proceed to
      OK
      NG

    Result:  1

    OK 

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY 

    Result:  2

    NG 

    REPLACE INSTRUMENT PANEL WIRE 

  13. CHECK NO. 4 INSTRUMENT PANEL WIRE (SHORT) 
    1. Disconnect the No. 4 instrument panel wire connector from the instrument panel wire.
      GTY428548Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Instrument Panel Junction Block Assembly
      *2 Airbag Sensor Assembly
      *3 Clock Assembly
      *4 Instrument Panel Wire
      *5 No. 4 Instrument Panel Wire
      *a Front view of wire harness connector
      (to Clock Assembly)
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      G7-16 (PAON) - G7-15 (P-AB) Always 1 MΩ or higher

      Result

      Proceed to
      OK
      NG

    Result:  2

    NG 

    REPLACE NO. 4 INSTRUMENT PANEL WIRE 

    Result:  1

    OK 

    See step  14

  14. CHECK INSTRUMENT PANEL WIRE (SHORT) 
    1. Disconnect the connector from the instrument panel junction block assembly.
      GTY433252Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Instrument Panel Junction Block Assembly
      *2 Airbag Sensor Assembly
      *3 Clock Assembly
      *4 Instrument Panel Wire
      *5 No. 4 Instrument Panel Wire
      *a Front view of wire harness connector
      (to Instrument Panel Junction Block Assembly)
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      4A-25 (PAON) - 4A-26 (P-AB) Always 1 MΩ or higher
      4A-23 (PAON) - 4A-44 (P-AB) Always 1 MΩ or higher

      Result

      Proceed to
      OK
      NG

    Result:  1

    OK 

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY 

    Result:  2

    NG 

    REPLACE INSTRUMENT PANEL WIRE 

  15. CHECK NO. 4 INSTRUMENT PANEL WIRE (OPEN) 
    1. Disconnect the No. 4 instrument panel wire connector from the instrument panel wire.
      GTY436702Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Instrument Panel Junction Block Assembly
      *2 Airbag Sensor Assembly
      *3 Clock Assembly
      *4 Instrument Panel Wire
      *5 No. 4 Instrument Panel Wire
      *6 Service Wire
      *a Front view of wire harness connector
      (to Clock Assembly)
      *b Front view of wire harness connector
      (to Instrument Panel Wire)
    2. Using a service wire, connect terminals 2 (PAON) and 1 (P-AB) of connector F.
      NOTE:

      Do not forcibly insert the service wire into the terminals of the connector when connecting the wire.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      G7-16 (PAON) - G7-15 (P-AB) Always Below 1 Ω
    4. Disconnect the service wire from connector F.

      Result

      Proceed to
      OK
      NG

    Result:  2

    NG 

    REPLACE NO. 4 INSTRUMENT PANEL WIRE 

    Result:  1

    OK 

    See step  16

  16. CHECK INSTRUMENT PANEL WIRE (OPEN) 
    1. Disconnect the connector from the instrument panel junction block assembly.
      GTY448367Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Instrument Panel Junction Block Assembly
      *2 Airbag Sensor Assembly
      *3 Clock Assembly
      *4 Instrument Panel Wire
      *5 No. 4 Instrument Panel Wire
      *6 Service Wire
      *a Front view of wire harness connector
      (to Instrument Panel Junction Block Assembly)
      *b Front view of wire harness connector
      (to Airbag Sensor Assembly)
    2. Using a service wire, connect terminals 23 (PAON) and 17 (P-AB) of connector B.
      NOTE:

      Do not forcibly insert the service wire into the terminals of the connector when connecting the wire.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      4A-25 (PAON) - 4A-26 (P-AB) Always Below 1 Ω
    4. Disconnect the service wire from connector B.
    5. Using a service wire, connect terminals 2 (PAON) and 1 (P-AB) of connector E.
      GTY447755Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Instrument Panel Junction Block Assembly
      *2 Airbag Sensor Assembly
      *3 Clock Assembly
      *4 Instrument Panel Wire
      *5 No. 4 Instrument Panel Wire
      *6 Service Wire
      *a Front view of wire harness connector
      (to Instrument Panel Junction Block Assembly)
      *b Front view of wire harness connector
      (to No. 4 Instrument Panel Wire)
      NOTE:

      Do not forcibly insert the service wire into the terminals of the connector when connecting the wire.

    6. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      4A-23 (PAON) - 4A-44 (P-AB) Always Below 1 Ω
    7. Disconnect the service wire from connector E.

      Result

      Proceed to
      OK
      NG

    Result:  1

    OK 

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY 

    Result:  2

    NG 

    REPLACE INSTRUMENT PANEL WIRE 

  17. CHECK CONNECTORS 
    1. Turn the ignition switch off.
    2. Disconnect the cable from the negative (-) battery terminal.
      WARNING:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

    3. Check that the connectors are properly connected to the airbag sensor assembly, clock assembly and instrument panel junction block assembly. Also check that the connectors that link the No. 4 instrument panel wire and instrument panel wire are properly connected.

      OK

      The connectors are properly connected.

      HINT: 

      If the connectors are not properly connected, reconnect the connectors and proceed to the next inspection.

    4. Disconnect the connectors from the airbag sensor assembly, clock assembly and instrument panel junction block assembly. Also disconnect the connectors that link the No. 4 instrument panel wire and instrument panel wire.
    5. Check that the terminals of the connectors are not damaged.

      OK

      The terminals are not deformed or damaged.

      Result

      Proceed to
      OK
      NG

    Result:  2

    NG 

    REPLACE WIRE HARNESS 

    Result:  1

    OK 

    See step  18

  18. CHECK WIRE HARNESS (OPEN) 
    1. Connect the connector to the instrument panel junction block assembly.
      GTY425743Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Instrument Panel Junction Block Assembly
      *2 Airbag Sensor Assembly
      *3 Clock Assembly
      *4 Service Wire
      *a Front view of wire harness connector
      (to Airbag Sensor Assembly)
      *b Front view of wire harness connector
      (to Clock Assembly)
    2. Using a service wire, connect terminals 23 (PAON) and 17 (P-AB) of connector B.
      NOTE:

      Do not forcibly insert the service wire into the terminals of the connector when connecting the wire.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      G7-16 (PAON) - G7-15 (P-AB) Always Below 1 Ω
    4. Disconnect the service wire from connector B.

      Result

      Proceed to
      OK
      NG

    Result:  2

    NG 

    See step  31

    Result:  1

    OK 

    See step  19

  19. CHECK WIRE HARNESS (SHORT) 
    1. Measure the resistance according to the value(s) in the table below.
      GTY449706Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Instrument Panel Junction Block Assembly
      *2 Airbag Sensor Assembly
      *3 Clock Assembly
      *a Front view of wire harness connector
      (to Clock Assembly)

      Standard Resistance

      Tester Connection Condition Specified Condition
      G7-16 (PAON) - G7-15 (P-AB) Always 1 MΩ or higher

      Result

      Proceed to
      OK
      NG

    Result:  2

    NG 

    See step  29

    Result:  1

    OK 

    See step  20

  20. CHECK WIRE HARNESS (SHORT TO B+) 
    1. Connect the cable to the negative (-) battery terminal.
      GTY449706Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Instrument Panel Junction Block Assembly
      *2 Airbag Sensor Assembly
      *3 Clock Assembly
      *a Front view of wire harness connector
      (to Clock Assembly)
    2. Turn the ignition switch to ON.
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      G7-16 (PAON) - Body ground Ignition switch ON Below 1 V
      G7-15 (P-AB) - Body ground Ignition switch ON Below 1 V
    4. Turn the ignition switch off.
    5. Disconnect the cable from the negative (-) battery terminal.
      WARNING:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

      Result

      Proceed to
      OK
      NG

    Result:  2

    NG 

    See step  27

    Result:  1

    OK 

    See step  21

  21. CHECK WIRE HARNESS (SHORT TO GROUND) 
    1. Measure the resistance according to the value(s) in the table below.
      GTY449706Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Instrument Panel Junction Block Assembly
      *2 Airbag Sensor Assembly
      *3 Clock Assembly
      *a Front view of wire harness connector
      (to Clock Assembly)

      Standard Resistance

      Tester Connection Condition Specified Condition
      G7-16 (PAON) - Body ground Always 1 MΩ or higher
      G7-15 (P-AB) - Body ground Always 1 MΩ or higher

      Result

      Proceed to
      OK
      NG

    Result:  2

    NG 

    See step  25

    Result:  1

    OK 

    See step  22

  22. CHECK PASSENGER AIRBAG ON/OFF INDICATOR (SOURCE VOLTAGE) 
    1. Connect the cable to the negative (-) battery terminal.
      GTY449705Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Instrument Panel Junction Block Assembly
      *2 Airbag Sensor Assembly
      *3 Clock Assembly
      *a Front view of wire harness connector
      (to Clock Assembly)
    2. Turn the ignition switch to ON.
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      G7-1 (IG+) - Body ground Ignition switch ON 11 to 14 V
    4. Turn the ignition switch off.
    5. Disconnect the cable from the negative (-) battery terminal.
      WARNING:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

      Result

      Proceed to
      OK
      NG

    Result:  2

    NG 

    REPLACE WIRE HARNESS OR BATTERY 

    Result:  1

    OK 

    See step  23

  23. CHECK PASSENGER AIRBAG ON/OFF INDICATOR 
    1. Connect the connector to the clock assembly.
      GTY445061Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Instrument Panel Junction Block Assembly
      *2 Airbag Sensor Assembly
      *3 Clock Assembly
      *a Front view of wire harness connector
      (to Airbag Sensor Assembly)
    2. Connect the cable to the negative (-) battery terminal.
    3. Turn the ignition switch to ON.
    4. Check the passenger airbag ON/OFF indicator according to the conditions in the table below.

      OK

      Terminal Connection Condition Specified Condition
      F38-23 (PAON) - Body ground Ignition switch ON "ON" comes on
      F38-17 (P-AB) - Body ground Ignition switch ON "OFF" comes on
    5. Turn the ignition switch off.
    6. Disconnect the cable from the negative (-) battery terminal.
      WARNING:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

      Result

      Proceed to
      OK
      NG

    Result:  2

    NG 

    REPLACE CLOCK ASSEMBLY. Refer to  REMOVAL [12/2013 - ] 

    Result:  1

    OK 

    See step  24

  24. CHECK DTC 
    1. Connect the connector to the airbag sensor assembly.
      GTY430757Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Instrument Panel Junction Block Assembly
      *2 Airbag Sensor Assembly
      *3 Clock Assembly
    2. Connect the cable to the negative (-) battery terminal.
    3. Clear the DTCs stored in memory.

      Refer to DTC CHECK / CLEAR [12/2013 - ]

      Body Electrical > SRS Airbag > Clear DTCs 

    4. Turn the ignition switch off.
    5. Turn the ignition switch to ON, and wait for at least 60 seconds.
    6. Check for DTCs.

      Refer to DTC CHECK / CLEAR [12/2013 - ]

      Body Electrical > SRS Airbag > Trouble Codes 

      OK

      DTC B1660-43 is not output.

      HINT: 

      Codes other than DTC B1660-43 may be output at this time, but they are not related to this check.

      Result

      Proceed to
      OK
      NG

    Result:  1

    OK 

    USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [12/2013 - 11/2016]  Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [11/2016 - ] 

    Result:  2

    NG 

    REPLACE AIRBAG SENSOR ASSEMBLY. Refer to  REMOVAL [12/2013 - ] 

  25. CHECK NO. 4 INSTRUMENT PANEL WIRE (SHORT TO GROUND) 
    1. Disconnect the No. 4 instrument panel wire connector from the instrument panel wire.
      GTY428548Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Instrument Panel Junction Block Assembly
      *2 Airbag Sensor Assembly
      *3 Clock Assembly
      *4 Instrument Panel Wire
      *5 No. 4 Instrument Panel Wire
      *a Front view of wire harness connector
      (to Clock Assembly)
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      G7-16 (PAON) - Body ground Always 1 MΩ or higher
      G7-15 (P-AB) - Body ground Always 1 MΩ or higher

      Result

      Proceed to
      OK
      NG

    Result:  2

    NG 

    REPLACE NO. 4 INSTRUMENT PANEL WIRE 

    Result:  1

    OK 

    See step  26

  26. CHECK INSTRUMENT PANEL WIRE (SHORT TO GROUND) 
    1. Disconnect the connector from the instrument panel junction block assembly.
      GTY433252Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Instrument Panel Junction Block Assembly
      *2 Airbag Sensor Assembly
      *3 Clock Assembly
      *4 Instrument Panel Wire
      *5 No. 4 Instrument Panel Wire
      *a Front view of wire harness connector
      (to Instrument Panel Junction Block Assembly)
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      4A-25 (PAON) - Body ground Always 1 MΩ or higher
      4A-23 (PAON) - Body ground Always 1 MΩ or higher
      4A-26 (P-AB) - Body ground Always 1 MΩ or higher
      4A-44 (P-AB) - Body ground Always 1 MΩ or higher

      Result

      Proceed to
      OK
      NG

    Result:  1

    OK 

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY 

    Result:  2

    NG 

    REPLACE INSTRUMENT PANEL WIRE 

  27. CHECK NO. 4 INSTRUMENT PANEL WIRE (SHORT TO B+) 
    1. Disconnect the No. 4 instrument panel wire connector from the instrument panel wire.
      GTY428548Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Instrument Panel Junction Block Assembly
      *2 Airbag Sensor Assembly
      *3 Clock Assembly
      *4 Instrument Panel Wire
      *5 No. 4 Instrument Panel Wire
      *a Front view of wire harness connector
      (to Clock Assembly)
    2. Connect the cable to the negative (-) battery terminal.
    3. Turn the ignition switch to ON.
    4. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      G7-16 (PAON) - Body ground Ignition switch ON Below 1 V
      G7-15 (P-AB) - Body ground Ignition switch ON Below 1 V
    5. Turn the ignition switch off.
    6. Disconnect the cable from the negative (-) battery terminal.
      WARNING:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

      Result

      Proceed to
      OK
      NG

    Result:  2

    NG 

    REPLACE NO. 4 INSTRUMENT PANEL WIRE 

    Result:  1

    OK 

    See step  28

  28. CHECK INSTRUMENT PANEL WIRE (SHORT TO B+) 
    1. Disconnect the connector from the instrument panel junction block assembly.
      GTY433252Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Instrument Panel Junction Block Assembly
      *2 Airbag Sensor Assembly
      *3 Clock Assembly
      *4 Instrument Panel Wire
      *5 No. 4 Instrument Panel Wire
      *a Front view of wire harness connector
      (to Instrument Panel Junction Block Assembly)
    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      4A-25 (PAON) - Other terminals Always 1 MΩ or higher
      4A-23 (PAON) - Other terminals Always 1 MΩ or higher
      4A-26 (P-AB) - Other terminals Always 1 MΩ or higher
      4A-44 (P-AB) - Other terminals Always 1 MΩ or higher

      Result

      Proceed to
      OK
      NG

    Result:  1

    OK 

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY 

    Result:  2

    NG 

    REPLACE INSTRUMENT PANEL WIRE 

  29. CHECK NO. 4 INSTRUMENT PANEL WIRE (SHORT) 
    1. Disconnect the No. 4 instrument panel wire connector from the instrument panel wire.
      GTY428548Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Instrument Panel Junction Block Assembly
      *2 Airbag Sensor Assembly
      *3 Clock Assembly
      *4 Instrument Panel Wire
      *5 No. 4 Instrument Panel Wire
      *a Front view of wire harness connector
      (to Clock Assembly)
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      G7-16 (PAON) - G7-15 (P-AB) Always 1 MΩ or higher

      Result

      Proceed to
      OK
      NG

    Result:  2

    NG 

    REPLACE NO. 4 INSTRUMENT PANEL WIRE 

    Result:  1

    OK 

    See step  30

  30. CHECK INSTRUMENT PANEL WIRE (SHORT) 
    1. Disconnect the connector from the instrument panel junction block assembly.
      GTY433252Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Instrument Panel Junction Block Assembly
      *2 Airbag Sensor Assembly
      *3 Clock Assembly
      *4 Instrument Panel Wire
      *5 No. 4 Instrument Panel Wire
      *a Front view of wire harness connector
      (to Instrument Panel Junction Block Assembly)
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      4A-25 (PAON) - 4A-26 (P-AB) Always 1 MΩ or higher
      4A-23 (PAON) - 4A-44 (P-AB) Always 1 MΩ or higher

      Result

      Proceed to
      OK
      NG

    Result:  1

    OK 

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY 

    Result:  2

    NG 

    REPLACE INSTRUMENT PANEL WIRE 

  31. CHECK NO. 4 INSTRUMENT PANEL WIRE (OPEN) 
    1. Disconnect the No. 4 instrument panel wire connector from the instrument panel wire.
      GTY436702Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Instrument Panel Junction Block Assembly
      *2 Airbag Sensor Assembly
      *3 Clock Assembly
      *4 Instrument Panel Wire
      *5 No. 4 Instrument Panel Wire
      *6 Service Wire
      *a Front view of wire harness connector
      (to Clock Assembly)
      *b Front view of wire harness connector
      (to Instrument Panel Wire)
    2. Using a service wire, connect terminals 2 (PAON) and 1 (P-AB) of connector F.
      NOTE:

      Do not forcibly insert the service wire into the terminals of the connector when connecting the wire.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      G7-16 (PAON) - G7-15 (P-AB) Always Below 1 Ω
    4. Disconnect the service wire from connector F.

      Result

      Proceed to
      OK
      NG

    Result:  2

    NG 

    REPLACE NO. 4 INSTRUMENT PANEL WIRE 

    Result:  1

    OK 

    See step  32

  32. CHECK INSTRUMENT PANEL WIRE (OPEN) 
    1. Disconnect the connector from the instrument panel junction block assembly.
      GTY448367Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Instrument Panel Junction Block Assembly
      *2 Airbag Sensor Assembly
      *3 Clock Assembly
      *4 Instrument Panel Wire
      *5 No. 4 Instrument Panel Wire
      *6 Service Wire
      *a Front view of wire harness connector
      (to Instrument Panel Junction Block Assembly)
      *b Front view of wire harness connector
      (to Airbag Sensor Assembly)
    2. Using a service wire, connect terminals 23 (PAON) and 17 (P-AB) of connector B.
      NOTE:

      Do not forcibly insert the service wire into the terminals of the connector when connecting the wire.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      4A-25 (PAON) - 4A-26 (P-AB) Always Below 1 Ω
    4. Disconnect the service wire from connector B.
    5. Using a service wire, connect terminals 2 (PAON) and 1 (P-AB) of connector E.
      GTY447755Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Instrument Panel Junction Block Assembly
      *2 Airbag Sensor Assembly
      *3 Clock Assembly
      *4 Instrument Panel Wire
      *5 No. 4 Instrument Panel Wire
      *6 Service Wire
      *a Front view of wire harness connector
      (to Instrument Panel Junction Block Assembly)
      *b Front view of wire harness connector
      (to No. 4 Instrument Panel Wire)
      NOTE:

      Do not forcibly insert the service wire into the terminals of the connector when connecting the wire.

    6. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      4A-23 (PAON) - 4A-44 (P-AB) Always Below 1 Ω
    7. Disconnect the service wire from connector E.

      Result

      Proceed to
      OK
      NG

    Result:  1

    OK 

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY 

    Result:  2

    NG 

    REPLACE INSTRUMENT PANEL WIRE 

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