LEMON Manuals: Even more car manuals for everyone
Home >> Toyota >> 2018 >> Mirai >> Repair and Diagnosis >> Restraints >> Air Bag, SRS >> Airbag System - Diagnostic Codes (2 Of 3) >> Airbag System >> DTC B1660-43: Passenger Airbag ON/OFF Indicator Circuit Malfunction [06/2015 - ] >> Procedure

DTC B1660-43: Passenger Airbag ON/OFF Indicator Circuit Malfunction [06/2015 - ]: Procedure

  1. CHECK PASSENGER AIRBAG ON/OFF INDICATOR CONDITION 
    1. Turn the power switch on (IG).
    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 [06/2015 - ]

      GTY560029Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Result

      ON/OFF Indicator Illumination Proceed to
      One or both indicators are always on A
      Both indicators are always off B

    Result: 

    B 

    See step  7

    Result: 

    A 

    See step  2

  2. CHECK CONNECTION OF CONNECTORS 
    1. Turn the power switch off.
    2. Disconnect the cable from the negative (-) auxiliary battery terminal, and wait for at least 90 seconds.
    3. Check that the connectors are properly connected to the airbag sensor assembly and air conditioning control assembly.

      Result

      Result Proceed to
      The connectors are properly connected A
      The connectors are not properly connected B

    Result: 

    B 

    CONNECT CONNECTORS PROPERLY 

    Result: 

    A 

    See step  3

  3. CHECK CONNECTORS 
    1. Disconnect the connectors from the airbag sensor assembly and combination meter assembly.
    2. Check that the connectors (on the airbag sensor assembly side and combination meter assembly side) are not damaged.
      GTY511942Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Combination Meter Assembly
      *2 Airbag Sensor Assembly

      Result

      Result Proceed to
      The connectors are not deformed or damaged A
      The connectors are deformed or damaged B

    Result: 

    B 

    REPLACE HARNESS AND CONNECTOR 

    Result: 

    A 

    See step  4

  4. CHECK PASSENGER AIRBAG ON/OFF INDICATOR 
    1. Connect the connector to the combination meter assembly.
      GTY448922Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Connect the cable to the negative (-) auxiliary battery terminal, and wait for at least 2 seconds.
    3. Turn the power switch on (IG).
    4. Check the passenger airbag ON/OFF indicator operation.

      Result

      Result Proceed to
      The passenger airbag ON/OFF indicator does not come on A
      The passenger airbag ON/OFF indicator comes on B

    Result: 

    B 

    See step  6

    Result: 

    A 

    See step  5

  5. CHECK DTC 
    1. Connect the connectors to the airbag sensor assembly.
      GTY369642Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Combination Meter Assembly
      *2 Airbag Sensor Assembly
    2. Connect the cable to the negative (-) auxiliary battery terminal, and wait for at least 2 seconds.
    3. Turn the power switch on (IG), and wait for at least 60 seconds.
    4. Clear the DTCs.

      Refer to DTC CHECK / CLEAR [06/2015 - ]

      Body Electrical > SRS Airbag > Clear DTCs 

    5. Turn the power switch off.
    6. Turn the power switch on (IG), and wait for at least 60 seconds.
    7. Check for DTCs.

      Refer to DTC CHECK / CLEAR [06/2015 - ]

      Body Electrical > SRS Airbag > Trouble Codes 

      Result

      Result Proceed to
      DTC B1660/43 is not output A
      DTC B1660/43 is output B

      HINT: 

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

    Result: 

    A 

    USE SIMULATION METHOD TO CHECK. Refer to  DIAGNOSIS SYSTEM [06/2015 - ] 

    Result: 

    B 

    REPLACE AIRBAG SENSOR ASSEMBLY. Refer to  REMOVAL [06/2015 - 11/2018]  , or refer to  REMOVAL [11/2018 - ] 

  6. CHECK PASSENGER AIRBAG ON/OFF INDICATOR CIRCUIT 
    1. Disconnect the connector from the combination meter assembly.
      GTY559714Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Combination Meter Assembly *2 Airbag Sensor Assembly
      *3 Connector C *4 Connector B
      *5 Service Wire - -
      *a Front view of wire harness connector
      (to Combination Meter Assembly)      		 *b Rear view of wire harness connector
      (to Airbag Sensor Assembly)
    2. Connect the cable to the negative (-) auxiliary battery terminal, and wait for at least 2 seconds.
    3. Turn the power switch on (IG).
    4. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      G14-4 (P-AB) - Body ground Power switch on (IG) Below 1 V
      G14-3 (PAON) - Body ground Power switch on (IG) Below 1 V
    5. Turn the power switch off.
    6. Disconnect the cable from the negative (-) auxiliary battery terminal, and wait for at least 90 seconds.
    7. 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 a service wire.

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

      Standard Resistance

      Tester Connection Condition Specified Condition
      G14-4 (P-AB) - G14-3 (PAON) Always Below 1 Ω
    9. Disconnect the service wire from connector B.
    10. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      G14-4 (P-AB) - G14-3 (PAON) Always 1 MΩ or higher
      G14-4 (P-AB) - Body ground Always 1 MΩ or higher
      G14-3 (PAON) - Body ground Always 1 MΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [06/2015 - 11/2018]  , or refer to  REMOVAL [11/2018 - ] 

    Result: 

    NG 

    REPLACE HARNESS AND CONNECTOR 

  7. CHECK CONNECTION OF CONNECTORS 
    1. Turn the power switch off.
    2. Disconnect the cable from the negative (-) auxiliary battery terminal, and wait for at least 90 seconds.
    3. Check that the connectors are properly connected to the airbag sensor assembly and air conditioning control assembly.

      Result

      Result Proceed to
      The connectors are properly connected A
      The connectors are not properly connected B

    Result: 

    B 

    CONNECT CONNECTORS PROPERLY 

    Result: 

    A 

    See step  8

  8. CHECK CONNECTORS 
    1. Disconnect the connectors from the airbag sensor assembly and combination meter assembly.
    2. Check that the connectors (on the airbag sensor assembly side and combination meter assembly side) are not damaged.
      GTY520677Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Combination Meter Assembly
      *2 Airbag Sensor Assembly

      Result

      Result Proceed to
      The connectors are not deformed or damaged A
      The connectors are deformed or damaged B

    Result: 

    B 

    REPLACE HARNESS AND CONNECTOR 

    Result: 

    A 

    See step  9

  9. CHECK PASSENGER AIRBAG ON/OFF INDICATOR CIRCUIT 
    1. Connect the cable to the negative (-) auxiliary battery terminal, and wait for at least 2 seconds.
      GTY559714Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Combination Meter Assembly *2 Airbag Sensor Assembly
      *3 Connector C *4 Connector B
      *5 Service Wire - -
      *a Front view of wire harness connector
      (to Combination Meter Assembly)      		 *b Rear view of wire harness connector
      (to Airbag Sensor Assembly)
    2. Turn the power switch on (IG).
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      G14-4 (P-AB) - Body ground Power switch on (IG) Below 1 V
      G14-3 (PAON) - Body ground Power switch on (IG) Below 1 V
    4. Turn the power switch off.
    5. Disconnect the cable from the negative (-) auxiliary battery terminal, and wait for at least 90 seconds.
    6. 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 a service wire.

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

      Standard Resistance

      Tester Connection Condition Specified Condition
      G14-4 (P-AB) - G14-3 (PAON) Always Below 1 Ω
    8. Disconnect the service wire from connector B.
    9. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      G14-4 (P-AB) - G14-3 (PAON) Always 1 MΩ or higher
      G14-4 (P-AB) - Body ground Always 1 MΩ or higher
      G14-3 (PAON) - Body ground Always 1 MΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE HARNESS AND CONNECTOR 

    Result: 

    OK 

    See step  10

  10. CHECK PASSENGER AIRBAG ON/OFF INDICATOR (SOURCE VOLTAGE) 
    1. Connect the connectors to the airbag sensor assembly.
      GTY555161Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Combination Meter Assembly)
    2. Connect the cable to the negative (-) auxiliary battery terminal, and wait for at least 2 seconds.
    3. Turn the power switch on (IG).
    4. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      G13-21 (IG+) - Body ground Power switch on (IG) 11 to 14 V

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  11

  11. CHECK PASSENGER AIRBAG ON/OFF INDICATOR 
    1. Turn the power switch off.
      GTY600144Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Rear view of wire harness connector
      (to Airbag Sensor Assembly)
    2. Disconnect the cable from the negative (-) auxiliary battery terminal, and wait for at least 90 seconds.
    3. Connect the connector to the combination meter assembly.
    4. Disconnect the connectors from the airbag sensor assembly.
    5. Using a service wire, connect terminal 23 (PAON) and body ground.
    6. Using a service wire, connect terminal 17 (P-AB) and body ground.
    7. Connect the cable to the negative (-) auxiliary battery terminal, and wait for at least 2 seconds.
    8. Turn the power switch on (IG).
    9. Check the indicator according to the table below.

      OK

      Tester Connection Switch Condition Passenger Airbag ON/OFF Indicator
      G33-23 (PAON) - Body ground Power switch on (IG) "ON" comes on
      G33-17 (P-AB) - Body ground Power switch on (IG) "OFF" comes on
    10. Disconnect the service wire from airbag sensor assembly.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [06/2015 - 11/2018]  , or refer to  REMOVAL [11/2018 - ] 

    Result: 

    OK 

    See step  12

  12. CHECK DTC 
    1. Turn the power switch off.
      GTY369643Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Combination Meter Assembly
      *2 Airbag Sensor Assembly
    2. Disconnect the cable from the negative (-) auxiliary battery terminal, and wait for at least 90 seconds.
    3. Connect the connectors to the airbag sensor assembly.
    4. Connect the cable to the negative (-) auxiliary battery terminal and wait for at least 2 seconds.
    5. Turn the power switch on (IG), and wait for at least 60 seconds.
    6. Clear the DTCs.

      Refer to DTC CHECK / CLEAR [06/2015 - ]

      Body Electrical > SRS Airbag > Clear DTCs 

    7. Turn the power switch off.
    8. Turn the power switch on (IG), and wait for at least 60 seconds.
    9. Check for DTCs.

      Refer to DTC CHECK / CLEAR [06/2015 - ]

      Body Electrical > SRS Airbag > Trouble Codes 

      Result

      Result Proceed to
      DTC B1660/43 is not output A
      DTC B1660/43 is output B

      HINT: 

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

    Result: 

    A 

    USE SIMULATION METHOD TO CHECK. Refer to  DIAGNOSIS SYSTEM [06/2015 - ] 

    Result: 

    B 

    REPLACE AIRBAG SENSOR ASSEMBLY. Refer to  REMOVAL [06/2015 - 11/2018]  , or refer to  REMOVAL [11/2018 - ] 

scientia non olet · About LEMON Manuals