Airbag System Srs Warning Light Remains On

Restraints. Camry. Acv40 Gsv40
Supplemental Restraint System. Camry. Acv40 Gsv40

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK CAN COMMUNICATION SYSTEM

CHECK BATTERY

CHECK CONNECTORS

CHECK WIRE HARNESS (SOURCE VOLTAGE OF CENTER AIRBAG SENSOR ASSEMBLY)

CHECK WIRE HARNESS (SOURCE VOLTAGE OF COMBINATION METER ASSEMBLY)

CHECK SRS WARNING LIGHT

AIRBAG SYSTEM - SRS Warning Light Remains ON


DESCRIPTION

The SRS warning light is located on the combination meter assembly.
When the SRS is normal, the SRS warning light comes on for approximately 6 seconds after the ignition switch is turned from the LOCK to the ON position, and then goes off automatically.
If there is a malfunction in the SRS, the SRS warning light comes on to inform the driver of a problem.
When terminals TC and CG of the DLC3 are connected, the DTC is displayed by blinking of the SRS warning light.
The SRS is equipped with a voltage-increase circuit (DC-DC converter) in the center airbag sensor assembly in case the source voltage drops.
When the battery voltage drops, the voltage-increase circuit (DC-DC converter) functions to increase the voltage of the SRS to normal voltage.
A malfunction in this circuit is not recorded in the center airbag sensor assembly. The SRS warning light automatically goes off when the source voltage returns to normal.
The signal to illuminate the SRS warning light is transmitted from the center airbag sensor assembly to the combination meter assembly through the CAN communication system.

WIRING DIAGRAM


Camry. Acv40 Gsv40.Supplemental Restraint System.Airbag System.Airbag System Srs Warning Light Remains On


Camry. Acv40 Gsv40.Supplemental Restraint System.Airbag System.Airbag System Srs Warning Light Remains On


INSPECTION PROCEDURE

1.CHECK CAN COMMUNICATION SYSTEM

  1. Check if a CAN communication DTC is output (CAMRY_ACV40 RM000000WIB09JX.htmlfor LHD, CAMRY_ACV40 RM000000WIB09KX.html for RHD).

    Result:

    Condition
    		Proceed To
    DTC is not output
    		A
    DTC is output
    		B


B
REPAIR CIRCUITS INDICATED BY OUTPUT DTCS
A


2.CHECK BATTERY

  1. Measure the voltage of the battery.

    Standard voltage:
    11 to 14 V


NG
CHECK AND REPLACE BATTERY OR CHARGING SYSTEM
OK


3.CHECK CONNECTORS

  1. Turn the ignition switch to the LOCK position.

  1. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.

  1. Check that the connectors are properly connected to the center airbag sensor assembly and combination meter assembly.

    OK:
    The connectors are properly connected.


NG
CONNECT CONNECTORS PROPERLY
OK


4.CHECK WIRE HARNESS (SOURCE VOLTAGE OF CENTER AIRBAG SENSOR ASSEMBLY)


    Camry. Acv40 Gsv40.Supplemental Restraint System.Airbag System.Airbag System Srs Warning Light Remains On

  1. Disconnect the connectors from the center airbag sensor assembly.

  1. Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.

  1. Turn the ignition switch to the ON position.

  1. Operate all components of the electrical system (defogger, wipers, headlight, heater blower, etc.).

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

    Standard voltage:
    Tester Connection
    		Condition
    		Specified Condition
    E30-21 (IG2) - Body ground
    		Ignition switch ON
    		10 to 14 V

  1. Turn the ignition switch to the LOCK position.

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

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    E30-25 (E1) - Body ground
    		Always
    		Below 1 Ω
    E30-26 (E2) - Body ground
    		Always
    		Below 1 Ω


NG
REPAIR OR REPLACE WIRE HARNESS
OK


5.CHECK WIRE HARNESS (SOURCE VOLTAGE OF COMBINATION METER ASSEMBLY)


    Camry. Acv40 Gsv40.Supplemental Restraint System.Airbag System.Airbag System Srs Warning Light Remains On

  1. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.

  1. Disconnect the F1 connector from the combination meter assembly.

  1. Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.

  1. Turn the ignition switch to the ON position.

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

    Standard voltage:
    Tester Connection
    		Condition
    		Specified Condition
    F1-1 (B2) - Body ground
    		Always
    		10 to 14 V
    F1-2 (B) - Body ground
    		Ignition switch ON
    		10 to 14 V
    F1-13 (IG+) - Body ground
    		Ignition switch ON
    		10 to 14 V

  1. Turn the ignition switch to the LOCK position.

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

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    F1-12 (E2) - Body ground
    		Always
    		Below 1 Ω
    F1-24 (ES) - Body ground
    		Always
    		Below 1 Ω


NG
REPAIR OR REPLACE WIRE HARNESS
OK


6.CHECK SRS WARNING LIGHT

  1. Turn the ignition switch to the LOCK position.

  1. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.

  1. Connect the connector to the combination meter assembly.

  1. Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.

  1. Turn the ignition switch to the ON position.

  1. Check the SRS warning light condition.

    OK:
    After the primary check period, SRS warning light goes off for approximately 10 seconds, and comes on.
    HINT:
    The primary check period shows approximately 6 seconds after the ignition switch is turned to the ON position.


NG
GO TO METER / GAUGE SYSTEM (CAMRY_ACV40 RM0000012G107SX.html)
OK

REPLACE CENTER AIRBAG SENSOR ASSEMBLY (CAMRY_ACV40 RM000000UWV065X.html)