Airbag System Srs Warning Light Does Not Come On

Restraints. Lexus Gs430, Gs300. Uzs190 Grs190
Supplemental Restraint System. Lexus Gs430, Gs300. Uzs190 Grs190

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK BATTERY

CHECK CONNECTORS

CHECK WIRE HARNESS (SOURCE VOLTAGE OF COMBINATION METER)

CHECK SRS WARNING LIGHT

AIRBAG SYSTEM - SRS Warning Light does not Come ON


DESCRIPTION

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WIRING DIAGRAM

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INSPECTION PROCEDURE

1.CHECK BATTERY

  1. Measure the voltage of the battery.

    Voltage:
    11 to 14 V


NG
CHECK AND REPLACE BATTERY OR CHARGING SYSTEM
OK


2.CHECK CONNECTORS

  1. Turn the engine switch off.

  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 the combination meter.

    OK:
    The connectors are connected.


NG
CONNECT CONNECTORS, THEN GO TO STEP 1
OK


3.CHECK WIRE HARNESS (SOURCE VOLTAGE OF COMBINATION METER)


    Lexus Gs430, Gs300. Uzs190 Grs190.Supplemental Restraint System.Airbag System.Airbag System Srs Warning Light Does Not Come On

  1. Turn the engine switch off.

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

  1. Disconnect the connector from the combination meter.

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

  1. Turn the engine switch on (IG).

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

    Voltage:
    Tester connection
    		Condition
    		Specified condition
    L31-1 (IG+) - Body ground
    		Engine switch on (IG)
    		10 to 14 V
    L31-22 (B) - Body ground
    		Always
    		10 to 14 V

  1. Turn the engine switch off.

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

    Resistance:
    Tester connection
    		Condition
    		Specified condition
    L31-28 (ES) - Body ground
    		Always
    		Below 1 Ω


NG
REPAIR OR REPLACE WIRE HARNESS
OK


4.CHECK SRS WARNING LIGHT

  1. Turn the engine switch off.

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

  1. Connect the connector to the combination meter.

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

  1. Turn the engine switch on (IG).

  1. Check the SRS warning light condition.

    OK:
    The SRS warning light does not come on.


NG
GO TO COMBINATION METER SYSTEM
OK

REPLACE CENTER AIRBAG SENSOR ASSEMBLY