AIRBAG SYSTEM, Diagnostic DTC:B1662/45

DTC Code DTC Name
B1662/45 Indicator Light Circuit Malfunction

DESCRIPTION

The indicator light circuit consists of the center airbag sensor assembly and combination meter assembly. If the center airbag sensor assembly detects a malfunction in the airbag system, the SRS warning light will come on to inform the driver.

DTC B1662/45 is stored when a malfunction is detected in the indicator light circuit.

DTC No. Detection Condition Trouble Area
B1662/45

  • The center airbag sensor assembly detects a short to ground or B+, or an open in the indicator light circuit.

  • Combination meter assembly malfunction

  • Center airbag sensor assembly malfunction

  • Instrument panel wire

  • Combination meter assembly

  • Center airbag sensor assembly

WIRING DIAGRAM

A01BACDE01

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK CONNECTORS


    1. Turn the ignition switch off.

    2. Disconnect the cable from the negative (-) battery terminal.

      CAUTION:

      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 center airbag sensor assembly and combination meter assembly.

      OK
      The connectors are properly connected.

      Tech Tips

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

    4. Disconnect the connectors from the center airbag sensor assembly and combination meter assembly.

    5. Check that the terminals of the connectors are not damaged.

      OK
      The terminals are not deformed or damaged.

    NG

    REPAIR OR REPLACE INSTRUMENT PANEL WIRE

    OK

  2. CHECK INSTRUMENT PANEL WIRE (SHORT TO GROUND)

    A01BE95E01
    Text in Illustration
    *1 Combination Meter Assembly
    *2 Center Airbag Sensor Assembly
    *a Connector B
    *b Instrument Panel Wire

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      B4-14 (LA) - Body ground Always 1 MΩ or higher

    NG

    REPAIR OR REPLACE INSTRUMENT PANEL WIRE

    OK

  3. CHECK INSTRUMENT PANEL WIRE (OPEN)

    A01BCD6E01
    Text in Illustration
    *1 Combination Meter Assembly
    *2 Center Airbag Sensor Assembly
    *a Connector B
    *b Connector C
    *c Instrument Panel Wire

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      B4-14 (LA) - H20-40 (SW) Always Below 1 Ω

    NG

    REPAIR OR REPLACE INSTRUMENT PANEL WIRE

    OK

  4. CHECK INSTRUMENT PANEL WIRE (SHORT TO Ｂ+)

    A01BE95E01
    Text in Illustration
    *1 Combination Meter Assembly
    *2 Center Airbag Sensor Assembly
    *a Connector B
    *b Instrument Panel Wire

    1. Connect the cable to the negative (-) battery terminal.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      B4-14 (LA) - Body ground Ignition switch ON Below 1 V

    NG

    REPAIR OR REPLACE INSTRUMENT PANEL WIRE

    OK

  5. CHECK CENTER AIRBAG SENSOR ASSEMBLY


    1. A01BBHKE01
      Text in Illustration
      *1 Combination Meter Assembly
      *2 Center Airbag Sensor Assembly
      *a Connector C
      *b Instrument Panel Wire

      Turn the ignition switch off.

    2. Disconnect the cable from the negative (-) battery terminal.

      CAUTION:

      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 center airbag sensor assembly.

    4. Connect the cable to the negative (-) battery terminal.

    5. Turn the ignition switch to ON, and wait for at least 60 seconds.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      H20-40 (SW) - Body ground For 6 seconds after ignition switch turned ON. Below 1 V
      After 6 seconds have passed since ignition switch turned ON. 11 to 14 V

    NG

    REPLACE CENTER AIRBAG SENSOR ASSEMBLY

    OK

    REPLACE COMBINATION METER ASSEMBLY