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Home >> Toyota >> 2021 >> C-HR LE >> Repair and Diagnosis >> Restraints >> Air Bag, SRS >> Supplemental Restraint System - Diagnostic Codes (B1660-B1805) >> Airbag System >> DTC B1660: P Seat Airbag Active Mode Indicator [09/2019 - ] >> Procedure

DTC B1660: P Seat Airbag Active Mode Indicator [09/2019 - ]: 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 [09/2019 - ]

      Result

      Result Proceed to
      Passenger airbag ON/OFF indicator illumination is always on. A
      Passenger airbag ON/OFF indicator illumination is always off. B

    Result: 

    B 

    See step  13

    Result: 

    A 

    See step  2

  2. CHECK CONNECTORS 
    1. Turn the ignition switch to ON.
    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, passenger airbag ON/OFF indicator (clock assembly) and instrument panel junction block assembly.

      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, passenger airbag ON/OFF indicator (clock assembly) and instrument panel junction block assembly.
    5. Check that the terminals of the connectors are not deformed or damaged.

      OK

      The terminals are not deformed or damaged.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE INSTRUMENT PANEL WIRE 

    Result: 

    OK 

    See step  3

  3. CHECK PASSENGER AIRBAG ON/OFF INDICATOR CONDITION 
    1. Connect the connector to the passenger airbag ON/OFF indicator (clock assembly) and instrument panel junction block 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 operation.

      OK

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

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  5

    Result: 

    OK 

    See step  4

  4. CHECK DTC 
    1. Turn the ignition switch off.
      GTY842757Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Instrument Panel Junction Block Assembly
      *2 Airbag Sensor Assembly
      *3 Passenger Airbag ON/OFF Indicator (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 [09/2019 - ]

      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 [09/2019 - ]

      Body Electrical > SRS Airbag > Trouble Codes 

      OK

      DTC B1660 is not output.

      HINT: 

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

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [09/2019 - 08/2020]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [08/2020 - ] 

    Result: 

    NG 

    REPLACE AIRBAG SENSOR ASSEMBLY. Refer to  REMOVAL [09/2019 - 08/2020]  , or refer to  REMOVAL [08/2020 - ] 

  5. CHECK WIRE HARNESS (OPEN) 
    1. Turn the ignition switch off.
      GTY938603Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Instrument Panel Junction Block Assembly *2 Airbag Sensor Assembly
      *3 Passenger Airbag ON/OFF Indicator (Clock Assembly) *4 Instrument Panel Wire
      *a Front view of wire harness connector
      (to Airbag Sensor Assembly)      		 *b Front view of wire harness connector
      (to Passenger Airbag ON/OFF Indicator (Clock Assembly))
      *c Service Wire - -
    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 passenger airbag ON/OFF indicator (clock assembly).
    4. Using a service wire, connect terminals 35 (PAON) and 34 (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
      F81-4 (PAON) - F81-3 (P-AB) Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  12

    Result: 

    OK 

    See step  6

  6. CHECK WIRE HARNESS (SHORT) 
    1. Disconnect the service wire from connector B.
      GTY911039Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Instrument Panel Junction Block Assembly
      *2 Airbag Sensor Assembly
      *3 Passenger Airbag ON/OFF Indicator (Clock Assembly)
      *4 Instrument Panel Wire
      *a Front view of wire harness connector
      (to Passenger Airbag ON/OFF Indicator (Clock Assembly))
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      F81-4 (PAON) - F81-3 (P-AB) Always 1 MΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  11

    Result: 

    OK 

    See step  7

  7. CHECK WIRE HARNESS (SHORT TO B+) 
    1. Connect the cable to the negative (-) battery terminal.
      GTY911039Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Instrument Panel Junction Block Assembly
      *2 Airbag Sensor Assembly
      *3 Passenger Airbag ON/OFF Indicator (Clock Assembly)
      *4 Instrument Panel Wire
      *a Front view of wire harness connector
      (to Passenger Airbag ON/OFF Indicator (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 Switch Condition Specified Condition
      F81-4 (PAON) - Body ground Ignition switch ON Below 1 V
      F81-3 (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: 

    NG 

    See step  10

    Result: 

    OK 

    See step  8

  8. CHECK WIRE HARNESS (SHORT TO GROUND) 
    1. Measure the resistance according to the value(s) in the table below.
      GTY911039Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Instrument Panel Junction Block Assembly
      *2 Airbag Sensor Assembly
      *3 Passenger Airbag ON/OFF Indicator (Clock Assembly)
      *4 Instrument Panel Wire
      *a Front view of wire harness connector
      (to Passenger Airbag ON/OFF Indicator (Clock Assembly))

      Standard Resistance

      Tester Connection Condition Specified Condition
      F81-4 (PAON) - Body ground Always 1 MΩ or higher
      F81-3 (P-AB) - Body ground Always 1 MΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE PASSENGER AIRBAG ON/OFF INDICATOR (CLOCK ASSEMBLY). Refer to  REMOVAL [10/2017 - ] 

    Result: 

    NG 

    See step  9

  9. CHECK INSTRUMENT PANEL WIRE (SHORT TO GROUND) 
    1. Disconnect the connector from the instrument panel junction block assembly.
      GTY901420Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Instrument Panel Junction Block Assembly
      *2 Airbag Sensor Assembly
      *3 Passenger Airbag ON/OFF Indicator
      (Clock Assembly)
      *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
      3A-8 (PAON) - Body ground Always 1 MΩ or higher
      3A-29 (PAON) - Body ground Always 1 MΩ or higher
      3A-46 (P-AB) - Body ground Always 1 MΩ or higher
      3A-51 (P-AB) - Body ground Always 1 MΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY. Refer to  REMOVAL [10/2017 - 08/2020]  , or refer to  REMOVAL [08/2020 - 12/2021]  , or refer to  REMOVAL [12/2021 - ] 

    Result: 

    NG 

    REPLACE INSTRUMENT PANEL WIRE 

  10. CHECK INSTRUMENT PANEL WIRE (SHORT TO B+) 
    1. Disconnect the connector from the instrument panel junction block assembly.
      GTY901420Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Instrument Panel Junction Block Assembly
      *2 Airbag Sensor Assembly
      *3 Passenger Airbag ON/OFF Indicator
      (Clock Assembly)
      *4 Instrument Panel Wire
      *a Front view of wire harness connector
      (to Instrument Panel Junction Block 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 Switch Condition Specified Condition
      3A-8 (PAON) - Body ground Ignition switch ON Below 1 V
      3A-29 (PAON) - Body ground Ignition switch ON Below 1 V
      3A-46 (P-AB) - Body ground Ignition switch ON Below 1 V
      3A-51 (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: 

    OK 

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY. Refer to  REMOVAL [10/2017 - 08/2020]  , or refer to  REMOVAL [08/2020 - 12/2021]  , or refer to  REMOVAL [12/2021 - ] 

    Result: 

    NG 

    REPLACE INSTRUMENT PANEL WIRE 

  11. CHECK INSTRUMENT PANEL WIRE (SHORT) 
    1. Disconnect the connector from the instrument panel junction block assembly.
      GTY901420Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Instrument Panel Junction Block Assembly
      *2 Airbag Sensor Assembly
      *3 Passenger Airbag ON/OFF Indicator
      (Clock Assembly)
      *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
      3A-8 (PAON) - 3A-46 (P-AB) Always 1 MΩ or higher
      3A-29 (PAON) - 3A-51 (P-AB) Always 1 MΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY. Refer to  REMOVAL [10/2017 - 08/2020]  , or refer to  REMOVAL [08/2020 - 12/2021]  , or refer to  REMOVAL [12/2021 - ] 

    Result: 

    NG 

    REPLACE INSTRUMENT PANEL WIRE 

  12. CHECK INSTRUMENT PANEL WIRE (OPEN) 
    1. Disconnect the connector from the instrument panel junction block assembly.
      GTY845860Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Instrument Panel Junction Block Assembly *2 Airbag Sensor Assembly
      *3 Passenger Airbag ON/OFF Indicator (Clock Assembly) *4 Instrument Panel 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)
      *c Service Wire - -

      HINT: 

      The service wire has already been inserted into connector B.

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

      Standard Resistance

      Tester Connection Condition Specified Condition
      3A-8 (PAON) - 3A-46 (P-AB) Always Below 1 Ω
    3. Disconnect the service wire from connector B.
    4. Using a service wire, connect terminals 3 (P-AB) and 4 (PAON) of connector E.
      GTY839480Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Instrument Panel Junction Block Assembly *2 Airbag Sensor Assembly
      *3 Passenger Airbag ON/OFF Indicator (Clock Assembly) *4 Instrument Panel Wire
      *a Front view of wire harness connector
      (to Instrument Panel Junction Block Assembly)      		 *b Front view of wire harness connector
      (to Passenger Airbag ON/OFF Indicator (Clock Assembly))
      *c Service Wire - -
      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
      3A-29 (PAON) - 3A-51 (P-AB) Always Below 1 Ω
    6. Disconnect the service wire from connector E.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY. Refer to  REMOVAL [10/2017 - 08/2020]  , or refer to  REMOVAL [08/2020 - 12/2021]  , or refer to  REMOVAL [12/2021 - ] 

    Result: 

    NG 

    REPLACE INSTRUMENT PANEL WIRE 

  13. 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, passenger airbag ON/OFF indicator (clock assembly) and instrument panel junction block assembly.

      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, passenger airbag ON/OFF indicator (clock assembly) and instrument panel junction block assembly.
    5. Check that the terminals of the connectors are not deformed or damaged.

      OK

      The terminals are not deformed or damaged.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE INSTRUMENT PANEL WIRE 

    Result: 

    OK 

    See step  14

  14. CHECK WIRE HARNESS (OPEN) 
    1. Connect the connector to the instrument panel junction block assembly.
      GTY938603Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Instrument Panel Junction Block Assembly *2 Airbag Sensor Assembly
      *3 Passenger Airbag ON/OFF Indicator (Clock Assembly) *4 Instrument Panel Wire
      *a Front view of wire harness connector
      (to Airbag Sensor Assembly)      		 *b Front view of wire harness connector
      (to Passenger Airbag ON/OFF Indicator (Clock Assembly))
      *c Service Wire - -
    2. Using a service wire, connect terminals 35 (PAON) and 34 (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
      F81-4 (PAON) - F81-3 (P-AB) Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  24

    Result: 

    OK 

    See step  15

  15. CHECK WIRE HARNESS (SHORT) 
    1. Disconnect the service wire from connector B.
      GTY911039Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Instrument Panel Junction Block Assembly
      *2 Airbag Sensor Assembly
      *3 Passenger Airbag ON/OFF Indicator (Clock Assembly)
      *4 Instrument Panel Wire
      *a Front view of wire harness connector
      (to Passenger Airbag ON/OFF Indicator (Clock Assembly))
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      F81-4 (PAON) - F81-3 (P-AB) Always 1 MΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  23

    Result: 

    OK 

    See step  16

  16. CHECK WIRE HARNESS (SHORT TO B+) 
    1. Connect the cable to the negative (-) battery terminal.
      GTY911039Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Instrument Panel Junction Block Assembly
      *2 Airbag Sensor Assembly
      *3 Passenger Airbag ON/OFF Indicator (Clock Assembly)
      *4 Instrument Panel Wire
      *a Front view of wire harness connector
      (to Passenger Airbag ON/OFF Indicator (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 Switch Condition Specified Condition
      F81-4 (PAON) - Body ground Ignition switch ON Below 1 V
      F81-3 (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: 

    NG 

    See step  22

    Result: 

    OK 

    See step  17

  17. CHECK WIRE HARNESS (SHORT TO GROUND) 
    1. Measure the resistance according to the value(s) in the table below.
      GTY911039Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Instrument Panel Junction Block Assembly
      *2 Airbag Sensor Assembly
      *3 Passenger Airbag ON/OFF Indicator (Clock Assembly)
      *4 Instrument Panel Wire
      *a Front view of wire harness connector
      (to Passenger Airbag ON/OFF Indicator (Clock Assembly))

      Standard Resistance

      Tester Connection Condition Specified Condition
      F81-4 (PAON) - Body ground Always 1 MΩ or higher
      F81-3 (P-AB) - Body ground Always 1 MΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  21

    Result: 

    OK 

    See step  18

  18. CHECK PASSENGER AIRBAG ON/OFF INDICATOR (SOURCE VOLTAGE) 
    1. Connect the cable to the negative (-) battery terminal.
      GTY911038Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Instrument Panel Junction Block Assembly
      *2 Airbag Sensor Assembly
      *3 Passenger Airbag ON/OFF Indicator (Clock Assembly)
      *4 Instrument Panel Wire
      *a Front view of wire harness connector
      (to Passenger Airbag ON/OFF Indicator (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 Switch Condition Specified Condition
      F81-1 (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: 

    NG 

    REPLACE WIRE HARNESS OR BATTERY 

    Result: 

    OK 

    See step  19

  19. CHECK PASSENGER AIRBAG ON/OFF INDICATOR 
    1. Connect the connector to the passenger airbag ON/OFF indicator (clock assembly).
      GTY919103Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Instrument Panel Junction Block Assembly
      *2 Airbag Sensor Assembly
      *3 Passenger Airbag ON/OFF Indicator (Clock Assembly)
      *4 Instrument Panel Wire
      *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 Switch Condition Specified Condition
      F150-35 (PAON) - Body ground Ignition switch ON "ON" comes on
      F150-34 (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: 

    NG 

    REPLACE PASSENGER AIRBAG ON/OFF INDICATOR (CLOCK ASSEMBLY). Refer to  REMOVAL [10/2017 - ] 

    Result: 

    OK 

    See step  20

  20. CHECK DTC 
    1. Connect the connector to the airbag sensor assembly.
      GTY842757Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Instrument Panel Junction Block Assembly
      *2 Airbag Sensor Assembly
      *3 Passenger Airbag ON/OFF Indicator (Clock Assembly)
    2. Connect the cable to the negative (-) battery terminal.
    3. Clear the DTCs stored in memory.

      Refer to DTC CHECK / CLEAR [09/2019 - ]

      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 [09/2019 - ]

      Body Electrical > SRS Airbag > Trouble Codes 

      OK

      DTC B1660 is not output.

      HINT: 

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

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [09/2019 - 08/2020]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [08/2020 - ] 

    Result: 

    NG 

    REPLACE AIRBAG SENSOR ASSEMBLY. Refer to  REMOVAL [09/2019 - 08/2020]  , or refer to  REMOVAL [08/2020 - ] 

  21. CHECK INSTRUMENT PANEL WIRE (SHORT TO GROUND) 
    1. Disconnect the connector from the instrument panel junction block assembly.
      GTY901420Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Instrument Panel Junction Block Assembly
      *2 Airbag Sensor Assembly
      *3 Passenger Airbag ON/OFF Indicator
      (Clock Assembly)
      *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
      3A-8 (PAON) - Body ground Always 1 MΩ or higher
      3A-29 (PAON) - Body ground Always 1 MΩ or higher
      3A-46 (P-AB) - Body ground Always 1 MΩ or higher
      3A-51 (P-AB) - Body ground Always 1 MΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY. Refer to  REMOVAL [10/2017 - 08/2020]  , or refer to  REMOVAL [08/2020 - 12/2021]  , or refer to  REMOVAL [12/2021 - ] 

    Result: 

    NG 

    REPLACE INSTRUMENT PANEL WIRE 

  22. CHECK INSTRUMENT PANEL WIRE (SHORT TO B+) 
    1. Disconnect the connector from the instrument panel junction block assembly.
      GTY901420Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Instrument Panel Junction Block Assembly
      *2 Airbag Sensor Assembly
      *3 Passenger Airbag ON/OFF Indicator
      (Clock Assembly)
      *4 Instrument Panel Wire
      *a Front view of wire harness connector
      (to Instrument Panel Junction Block 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 Switch Condition Specified Condition
      3A-8 (PAON) - Body ground Ignition switch ON Below 1 V
      3A-29 (PAON) - Body ground Ignition switch ON Below 1 V
      3A-46 (P-AB) - Body ground Ignition switch ON Below 1 V
      3A-51 (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: 

    OK 

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY. Refer to  REMOVAL [10/2017 - 08/2020]  , or refer to  REMOVAL [08/2020 - 12/2021]  , or refer to  REMOVAL [12/2021 - ] 

    Result: 

    NG 

    REPLACE INSTRUMENT PANEL WIRE 

  23. CHECK INSTRUMENT PANEL WIRE (SHORT) 
    1. Disconnect the connector from the instrument panel junction block assembly.
      GTY901420Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Instrument Panel Junction Block Assembly
      *2 Airbag Sensor Assembly
      *3 Passenger Airbag ON/OFF Indicator
      (Clock Assembly)
      *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
      3A-8 (PAON) - 3A-46 (P-AB) Always 1 MΩ or higher
      3A-29 (PAON) - 3A-51 (P-AB) Always 1 MΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY. Refer to  REMOVAL [10/2017 - 08/2020]  , or refer to  REMOVAL [08/2020 - 12/2021]  , or refer to  REMOVAL [12/2021 - ] 

    Result: 

    NG 

    REPLACE INSTRUMENT PANEL WIRE 

  24. CHECK INSTRUMENT PANEL WIRE (OPEN) 
    1. Disconnect the connector from the instrument panel junction block assembly.

      HINT: 

      The service wire has already been inserted into connector B.

      GTY845860Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Instrument Panel Junction Block Assembly *2 Airbag Sensor Assembly
      *3 Passenger Airbag ON/OFF Indicator (Clock Assembly) *4 Instrument Panel 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)
      *c Service Wire - -
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      3A-8 (PAON) - 3A-46 (P-AB) Always Below 1 Ω
    3. Disconnect the service wire from connector B.
    4. Using a service wire, connect terminals 3 (P-AB) and 4 (PAON) of connector E.
      NOTE:

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

      GTY839480Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Instrument Panel Junction Block Assembly *2 Airbag Sensor Assembly
      *3 Passenger Airbag ON/OFF Indicator (Clock Assembly) *4 Instrument Panel Wire
      *a Front view of wire harness connector
      (to Instrument Panel Junction Block Assembly)      		 *b Front view of wire harness connector
      (to Passenger Airbag ON/OFF Indicator (Clock Assembly))
      *c Service Wire - -
    5. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      3A-29 (PAON) - 3A-51 (P-AB) Always Below 1 Ω
    6. Disconnect the service wire from connector E.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY. Refer to  REMOVAL [10/2017 - 08/2020]  , or refer to  REMOVAL [08/2020 - 12/2021]  , or refer to  REMOVAL [12/2021 - ] 

    Result: 

    NG 

    REPLACE INSTRUMENT PANEL WIRE 

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