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Home >> Toyota >> 2018 >> Avalon XLE >> Repair and Diagnosis >> Restraints >> Air Bag, SRS >> Supplemental Restraint System - Diagnostic Codes & Symptom Tests - (Except Hybrid) >> Airbag System >> DTC B1660/43: Passenger Airbag ON/OFF Indicator Circuit Malfunction [10/2014 - ] >> Procedure

DTC B1660/43: Passenger Airbag ON/OFF Indicator Circuit Malfunction [10/2014 - ]: Procedure

  1. CHECK PASSENGER AIRBAG ON/OFF INDICATOR CONDITION 
    1. Turn the engine switch on (IG).
    2. Check the passenger airbag ON/OFF indicator operation.

      Result

      ON/OFF Indicator Illumination Proceed to
      Always ON A
      OFF B

      HINT: 

      Refer to the normal condition of the passenger airbag ON/OFF indicator (Refer to DIAGNOSIS SYSTEM [10/2014 - ] ).

    Result: 

    B 

    See step  9

    Result: 

    A 

    See step  2

  2. CHECK CONNECTORS 
    1. Turn the engine 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 ECU assembly and radio and display receiver assembly*1 or navigation ECU sub-assembly*2. Also check that the connectors that link the instrument panel wire and No. 2 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 ECU assembly and radio and display receiver assembly*1 or navigation ECU sub-assembly*2. Also disconnect the connectors that link the instrument panel wire and No. 2 instrument panel wire.
    5. Check that the terminals of the connectors are not damaged.

      OK

      The terminals are not deformed or damaged.

      *1: for Radio and Display Type

      *2: for Navigation Receiver Type

    Result: 

    NG 

    REPLACE WIRE HARNESS 

    Result: 

    OK 

    See step  3

  3. CHECK PASSENGER AIRBAG ON/OFF INDICATOR 
    1. Connect the connectors that link the instrument panel wire and No. 2 instrument panel wire.
    2. Connect the connector to the radio and display receiver assembly*1 or navigation ECU sub-assembly*2.
    3. Connect the cable to the negative (-) battery terminal.
    4. Turn the engine switch on (IG).
    5. Check the passenger airbag ON/OFF indicator operation.

      OK

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

      *1: for Radio and Display Type

      *2: for Navigation Receiver Type

    Result: 

    NG 

    See step  5

    Result: 

    OK 

    See step  4

  4. CHECK DTC 
    1. Turn the engine switch off.
      GTY587972Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *1 Radio and Display Receiver Assembly (for Radio and Display Type)
      *2 Navigation ECU Sub-assembly (for Navigation Receiver Type)
      *3 Airbag ECU 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 ECU assembly.
    4. Connect the cable to the negative (-) battery terminal.
    5. Clear the DTCs stored in memory (Refer to DTC CHECK / CLEAR [10/2014 - ] ).
    6. Turn the engine switch off.
    7. Turn the engine switch on (IG), and wait for at least 60 seconds.
    8. Check for DTCs (Refer to DTC CHECK / CLEAR [10/2014 - ] ).

      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: 

    OK 

    USE SIMULATION METHOD TO CHECK 

    (Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2014 - 10/2015] or HOW TO PROCEED WITH TROUBLESHOOTING [10/2015 - ] )

    Result: 

    NG 

    REPLACE AIRBAG ECU ASSEMBLY 

    (Refer to REMOVAL [10/2014 - ] )

  5. CHECK WIRE HARNESS (OPEN) 
    1. Turn the engine switch off.
      GTY591891Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *A for Radio and Display Type
      *B for Navigation Receiver Type
      *1 Radio and Display Receiver Assembly (for Radio and Display Type)
      *2 Navigation ECU Sub-assembly (for Navigation Receiver Type)
      *3 Airbag ECU Assembly
      *4 Service Wire
      *a Front view of wire harness connector
      (to Airbag ECU Assembly)
      *b Front view of wire harness connector
      (to Radio and Display Receiver Assembly (for Radio and Display Type))
      *c Front view of wire harness connector
      (to Navigation ECU Sub-assembly (for Navigation Receiver Type))
    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. for Radio and Display Type:

      Disconnect the connector from the radio and display receiver assembly.

    4. for Navigation Receiver Type:

      Disconnect the connector from the navigation ECU sub-assembly.

    5. 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.

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

      Standard Resistance

      FOR RADIO AND DISPLAY TYPE

      Tester Connection Condition Specified Condition
      E6-2 (PAON) - E6-5 (P-AB) Always Below 1 Ω
      FOR NAVIGATION RECEIVER TYPE

      Tester Connection Condition Specified Condition
      E24-2 (PAON) - E24-5 (P-AB) Always Below 1 Ω

    Result: 

    NG 

    See step  17

    Result: 

    OK 

    See step  6

  6. CHECK WIRE HARNESS (SHORT) 
    1. Disconnect the service wire from connector B.
      GTY540475Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *A for Radio and Display Type
      *B for Navigation Receiver Type
      *1 Radio and Display Receiver Assembly (for Radio and Display Type)
      *2 Navigation ECU Sub-assembly (for Navigation Receiver Type)
      *3 Airbag ECU Assembly
      *a Front view of wire harness connector
      (to Radio and Display Receiver Assembly (for Radio and Display Type))
      *b Front view of wire harness connector
      (to Navigation ECU Sub-assembly (for Navigation Receiver Type))
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      FOR RADIO AND DISPLAY TYPE

      Tester Connection Condition Specified Condition
      E6-2 (PAON) - E6-5 (P-AB) Always 1 MΩ or higher
      FOR NAVIGATION RECEIVER TYPE

      Tester Connection Condition Specified Condition
      E24-2 (PAON) - E24-5 (P-AB) Always 1 MΩ or higher

    Result: 

    NG 

    See step  18

    Result: 

    OK 

    See step  7

  7. CHECK WIRE HARNESS (SHORT TO B+) 
    1. Connect the cable to the negative (-) battery terminal.
      GTY540475Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *A for Radio and Display Type
      *B for Navigation Receiver Type
      *1 Radio and Display Receiver Assembly (for Radio and Display Type)
      *2 Navigation ECU Sub-assembly (for Navigation Receiver Type)
      *3 Airbag ECU Assembly
      *a Front view of wire harness connector
      (to Radio and Display Receiver Assembly (for Radio and Display Type))
      *b Front view of wire harness connector
      (to Navigation ECU Sub-assembly (for Navigation Receiver Type))
    2. Turn the engine switch on (IG).
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      FOR RADIO AND DISPLAY TYPE

      Tester Connection Condition Specified Condition
      E6-2 (PAON) - Body ground Engine switch on (IG) Below 1 V
      E6-5 (P-AB) - Body ground Engine switch on (IG) Below 1 V
      FOR NAVIGATION RECEIVER TYPE

      Tester Connection Condition Specified Condition
      E24-2 (PAON) - Body ground Engine switch on (IG) Below 1 V
      E24-5 (P-AB) - Body ground Engine switch on (IG) Below 1 V
    4. Turn the engine 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: 

    NG 

    See step  19

    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.
      GTY540475Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *A for Radio and Display Type
      *B for Navigation Receiver Type
      *1 Radio and Display Receiver Assembly (for Radio and Display Type)
      *2 Navigation ECU Sub-assembly (for Navigation Receiver Type)
      *3 Airbag ECU Assembly
      *a Front view of wire harness connector
      (to Radio and Display Receiver Assembly (for Radio and Display Type))
      *b Front view of wire harness connector
      (to Navigation ECU Sub-assembly (for Navigation Receiver Type))

      Standard Resistance

      FOR RADIO AND DISPLAY TYPE

      Tester Connection Condition Specified Condition
      E6-2 (PAON) - Body ground Always 1 MΩ or higher
      E6-5 (P-AB) - Body ground Always 1 MΩ or higher
      FOR NAVIGATION RECEIVER TYPE

      Tester Connection Condition Specified Condition
      E24-2 (PAON) - Body ground Always 1 MΩ or higher
      E24-5 (P-AB) - Body ground Always 1 MΩ or higher

      Result

      Result Proceed to
      OK (for Radio and Display Type) A
      OK (for Navigation Receiver Type) B
      NG C

    Result: 

    A 

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY 

    (Refer to REMOVAL [10/2014 - ] )

    Result: 

    B 

    REPLACE NAVIGATION ECU SUB-ASSEMBLY 

    (Refer to REMOVAL [10/2014 - ] )

    Result: 

    C 

    See step  20

  9. CHECK CONNECTORS 
    1. Turn the engine 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 ECU assembly and radio and display receiver assembly*1 or navigation ECU sub-assembly*2. Also check that the connectors that link the instrument panel wire and No. 2 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 ECU assembly and radio and display receiver assembly*1 or navigation ECU sub-assembly*2. Also disconnect the connectors that link the instrument panel wire and No. 2 instrument panel wire.
    5. Check that the terminals of the connectors are not damaged.

      OK

      The terminals are not deformed or damaged.

      *1: for Radio and Display Type

      *2: for Navigation Receiver Type

    Result: 

    NG 

    REPLACE WIRE HARNESS 

    Result: 

    OK 

    See step  10

  10. CHECK WIRE HARNESS (OPEN) 
    1. Connect the connectors that link the instrument panel wire and No. 2 instrument panel wire.
      GTY591891Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *A for Radio and Display Type
      *B for Navigation Receiver Type
      *1 Radio and Display Receiver Assembly (for Radio and Display Type)
      *2 Navigation ECU Sub-assembly (for Navigation Receiver Type)
      *3 Airbag ECU Assembly
      *4 Service Wire
      *a Front view of wire harness connector
      (to Airbag ECU Assembly)
      *b Front view of wire harness connector
      (to Radio and Display Receiver Assembly (for Radio and Display Type))
      *c Front view of wire harness connector
      (to Navigation ECU Sub-assembly (for Navigation Receiver Type))
    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

      FOR RADIO AND DISPLAY TYPE

      Tester Connection Condition Specified Condition
      E6-2 (PAON) - E6-5 (P-AB) Always Below 1 Ω
      FOR NAVIGATION RECEIVER TYPE

      Tester Connection Condition Specified Condition
      E24-2 (PAON) - E24-5 (P-AB) Always Below 1 Ω

    Result: 

    NG 

    See step  17

    Result: 

    OK 

    See step  11

  11. CHECK WIRE HARNESS (SHORT) 
    1. Disconnect the service wire from connector B.
      GTY540475Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *A for Radio and Display Type
      *B for Navigation Receiver Type
      *1 Radio and Display Receiver Assembly (for Radio and Display Type)
      *2 Navigation ECU Sub-assembly (for Navigation Receiver Type)
      *3 Airbag ECU Assembly
      *a Front view of wire harness connector
      (to Radio and Display Receiver Assembly (for Radio and Display Type))
      *b Front view of wire harness connector
      (to Navigation ECU Sub-assembly (for Navigation Receiver Type))
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      FOR RADIO AND DISPLAY TYPE

      Tester Connection Condition Specified Condition
      E6-2 (PAON) - E6-5 (P-AB) Always 1 MΩ or higher
      FOR NAVIGATION RECEIVER TYPE

      Tester Connection Condition Specified Condition
      E24-2 (PAON) - E24-5 (P-AB) Always 1 MΩ or higher

    Result: 

    NG 

    See step  18

    Result: 

    OK 

    See step  12

  12. CHECK WIRE HARNESS (SHORT TO B+) 
    1. Connect the cable to the negative (-) battery terminal.
      GTY540475Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *A for Radio and Display Type
      *B for Navigation Receiver Type
      *1 Radio and Display Receiver Assembly (for Radio and Display Type)
      *2 Navigation ECU Sub-assembly (for Navigation Receiver Type)
      *3 Airbag ECU Assembly
      *a Front view of wire harness connector
      (to Radio and Display Receiver Assembly (for Radio and Display Type))
      *b Front view of wire harness connector
      (to Navigation ECU Sub-assembly (for Navigation Receiver Type))
    2. Turn the engine switch on (IG).
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      FOR RADIO AND DISPLAY TYPE

      Tester Connection Condition Specified Condition
      E6-2 (PAON) - Body ground Engine switch on (IG) Below 1 V
      E6-5 (P-AB) - Body ground Engine switch on (IG) Below 1 V
      FOR NAVIGATION RECEIVER TYPE

      Tester Connection Condition Specified Condition
      E24-2 (PAON) - Body ground Engine switch on (IG) Below 1 V
      E24-5 (P-AB) - Body ground Engine switch on (IG) Below 1 V
    4. Turn the engine 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: 

    NG 

    See step  19

    Result: 

    OK 

    See step  13

  13. CHECK WIRE HARNESS (SHORT TO GROUND) 
    1. Measure the resistance according to the value(s) in the table below.
      GTY540475Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *A for Radio and Display Type
      *B for Navigation Receiver Type
      *1 Radio and Display Receiver Assembly (for Radio and Display Type)
      *2 Navigation ECU Sub-assembly (for Navigation Receiver Type)
      *3 Airbag ECU Assembly
      *a Front view of wire harness connector
      (to Radio and Display Receiver Assembly (for Radio and Display Type))
      *b Front view of wire harness connector
      (to Navigation ECU Sub-assembly (for Navigation Receiver Type))

      Standard Resistance

      FOR RADIO AND DISPLAY TYPE

      Tester Connection Condition Specified Condition
      E6-2 (PAON) - Body ground Always 1 MΩ or higher
      E6-5 (P-AB) - Body ground Always 1 MΩ or higher
      FOR NAVIGATION RECEIVER TYPE

      Tester Connection Condition Specified Condition
      E24-2 (PAON) - Body ground Always 1 MΩ or higher
      E24-5 (P-AB) - Body ground Always 1 MΩ or higher

    Result: 

    NG 

    See step  20

    Result: 

    OK 

    See step  14

  14. CHECK PASSENGER AIRBAG ON/OFF INDICATOR (SOURCE VOLTAGE) 
    1. Connect the cable to the negative (-) battery terminal.
      GTY546724Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *A for Radio and Display Type
      *B for Navigation Receiver Type
      *1 Radio and Display Receiver Assembly (for Radio and Display Type)
      *2 Navigation ECU Sub-assembly (for Navigation Receiver Type)
      *3 Airbag ECU Assembly
      *a Front view of wire harness connector
      (to Radio and Display Receiver Assembly (for Radio and Display Type))
      *b Front view of wire harness connector
      (to Navigation ECU Sub-assembly (for Navigation Receiver Type))
    2. Turn the engine switch on (IG).
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      FOR RADIO AND DISPLAY TYPE

      Tester Connection Condition Specified Condition
      E6-1 (B) - Body ground Engine switch on (IG) 11 to 14 V
      FOR NAVIGATION RECEIVER TYPE

      Tester Connection Condition Specified Condition
      E24-1 (B) - Body ground Engine switch on (IG) 11 to 14 V
    4. Turn the engine 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: 

    NG 

    REPLACE WIRE HARNESS OR BATTERY 

    Result: 

    OK 

    See step  15

  15. CHECK PASSENGER AIRBAG ON/OFF INDICATOR 
    1. for Radio and Display Type:

      Connect the connector to the radio and display receiver assembly.

      GTY555324Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *1 Radio and Display Receiver Assembly (for Radio and Display Type)
      *2 Navigation ECU Sub-assembly (for Navigation Receiver Type)
      *3 Airbag ECU Assembly
      *a Front view of wire harness connector
      (to Airbag ECU Assembly)
    2. for Navigation Receiver Type:

      Connect the connector to the navigation ECU sub-assembly.

    3. Connect the cable to the negative (-) battery terminal.
    4. Turn the engine switch on (IG).
    5. Check the indicator according to the conditions in the table below.

      OK

      Terminal Connection Condition Specified Condition
      D36-23 (PAON) - Body ground Engine switch on (IG) "ON" comes on
      D36-17 (P-AB) - Body ground Engine switch on (IG) "OFF" comes on

      Result

      Result Proceed to
      OK A
      NG (for Radio and Display Type) B
      NG (for Navigation Receiver Type) C
    6. Turn the engine switch off.
    7. 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: 

    B 

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY 

    (Refer to REMOVAL [10/2014 - ] )

    Result: 

    C 

    REPLACE NAVIGATION ECU SUB-ASSEMBLY 

    (Refer to REMOVAL [10/2014 - ] )

    Result: 

    A 

    See step  16

  16. CHECK DTC 
    1. Connect the connector to the airbag ECU assembly.
      GTY587972Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *1 Radio and Display Receiver Assembly (for Radio and Display Type)
      *2 Navigation ECU Sub-assembly (for Navigation Receiver Type)
      *3 Airbag ECU Assembly
    2. Connect the cable to the negative (-) battery terminal.
    3. Clear the DTCs stored in memory (Refer to DTC CHECK / CLEAR [10/2014 - ] ).
    4. Turn the engine switch off.
    5. Turn the engine switch on (IG), and wait for at least 60 seconds.
    6. Check for DTCs (Refer to DTC CHECK / CLEAR [10/2014 - ] ).

      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: 

    OK 

    USE SIMULATION METHOD TO CHECK 

    (Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2014 - 10/2015] or HOW TO PROCEED WITH TROUBLESHOOTING [10/2015 - ] )

    Result: 

    NG 

    REPLACE AIRBAG ECU ASSEMBLY 

    (Refer to REMOVAL [10/2014 - ] )

  17. CHECK INSTRUMENT PANEL WIRE (OPEN) 
    1. Disconnect the instrument panel wire from the No. 2 instrument panel wire.
      GTY564638Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *1 Radio and Display Receiver Assembly (for Radio and Display Type)
      *2 Navigation ECU Sub-assembly (for Navigation Receiver Type)
      *3 Airbag ECU Assembly
      *4 No. 2 Instrument Panel Wire
      *5 Instrument Panel Wire
      *6 Service Wire
      *a Front view of wire harness connector
      (to Airbag ECU Assembly)
      *b Front view of wire harness connector
      (to No. 2 Instrument Panel 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
      DE2-21 (PAON) - DE2-3 (P-AB) Always Below 1 Ω
    3. Disconnect the service wire from connector B.

    Result: 

    OK 

    REPLACE NO. 2 INSTRUMENT PANEL WIRE 

    Result: 

    NG 

    REPLACE INSTRUMENT PANEL WIRE 

  18. CHECK INSTRUMENT PANEL WIRE (SHORT) 
    1. Disconnect the instrument panel wire from the No. 2 instrument panel wire.
      GTY573204Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *1 Radio and Display Receiver Assembly (for Radio and Display Type)
      *2 Navigation ECU Sub-assembly (for Navigation Receiver Type)
      *3 Airbag ECU Assembly
      *4 No. 2 Instrument Panel Wire
      *5 Instrument Panel Wire
      *a Front view of wire harness connector
      (to No. 2 Instrument Panel Wire)
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      DE2-21 (PAON) - DE2-3 (P-AB) Always 1 MΩ or higher

    Result: 

    OK 

    REPLACE NO. 2 INSTRUMENT PANEL WIRE 

    Result: 

    NG 

    REPLACE INSTRUMENT PANEL WIRE 

  19. CHECK INSTRUMENT PANEL WIRE (SHORT TO B+) 
    1. Disconnect the instrument panel wire from the No. 2 instrument panel wire.
      GTY573204Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *1 Radio and Display Receiver Assembly (for Radio and Display Type)
      *2 Navigation ECU Sub-assembly (for Navigation Receiver Type)
      *3 Airbag ECU Assembly
      *4 No. 2 Instrument Panel Wire
      *5 Instrument Panel Wire
      *a Front view of wire harness connector
      (to No. 2 Instrument Panel Wire)
    2. Connect the cable to the negative (-) battery terminal.
    3. Turn the engine switch on (IG).
    4. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      DE2-21 (PAON) - Body ground Engine switch on (IG) Below 1 V
      DE2-3 (P-AB) - Body ground Engine switch on (IG) Below 1 V
    5. Turn the engine 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: 

    OK 

    REPLACE NO. 2 INSTRUMENT PANEL WIRE 

    Result: 

    NG 

    REPLACE INSTRUMENT PANEL WIRE 

  20. CHECK INSTRUMENT PANEL WIRE (SHORT TO GROUND) 
    1. Disconnect the instrument panel wire from the No. 2 instrument panel wire.
      GTY573204Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *1 Radio and Display Receiver Assembly (for Radio and Display Type)
      *2 Navigation ECU Sub-assembly (for Navigation Receiver Type)
      *3 Airbag ECU Assembly
      *4 No. 2 Instrument Panel Wire
      *5 Instrument Panel Wire
      *a Front view of wire harness connector
      (to No. 2 Instrument Panel Wire)
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      DE2-21 (PAON) - Body ground Always 1 MΩ or higher
      DE2-3 (P-AB) - Body ground Always 1 MΩ or higher

    Result: 

    OK 

    REPLACE NO. 2 INSTRUMENT PANEL WIRE 

    Result: 

    NG 

    REPLACE INSTRUMENT PANEL WIRE 

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