SRS Warning Light Remains ON (to 12/2010)

SUPPLEMENTAL RESTRAINT SYSTEM: AIRBAG SYSTEM: SRS Warning Light Remains ON
- SRS Warning Light Remains ON

DESCRIPTION

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 displayed differently from other codes. The source voltage drop is indicated when the SRS warning light comes on without showing any DTCs.

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 SRS warning light is located on the combination meter.

When the SRS is normal, the SRS warning light comes on for approximately 6 seconds after the ignition switch is turned from off to on (IG), 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 DTCs are displayed by blinking the SRS warning light.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK BATTERY

(a) Measure the voltage of the battery.

Standard voltage:

11 to 14 V

NG -- REPLACE BATTERY
OK -- Continue to next step.

2. CHECK WIRE HARNESS (POWER SOURCE)

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





(b) Turn the ignition switch on (IG).

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

Standard voltage:





NG -- REPAIR OR REPLACE WIRE HARNESS (BATTERY - CENTER AIRBAG SENSOR ASSEMBLY)
OK -- Continue to next step.

3. CHECK WIRE HARNESS (CENTER AIRBAG SENSOR ASSEMBLY - BODY GROUND)

(a) Turn the ignition switch off.





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

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

Standard resistance:





NG -- REPAIR OR REPLACE WIRE HARNESS
OK -- Continue to next step.

4. CHECK CONNECTION OF CONNECTORS

(a) Check that the connectors are properly connected to the center airbag sensor assembly.

OK:

The connectors are connected.

NG -- CONNECT CONNECTORS
OK -- Continue to next step.

5. CHECK WIRE HARNESS (CENTER AIRBAG SENSOR ASSEMBLY - COMBINATION METER)

(a) Disconnect the connectors from the combination meter.





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





(c) Turn the ignition switch on (IG).

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

Standard voltage:





(e) Turn the ignition switch off.

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

Standard resistance:





NG -- REPAIR OR REPLACE WIRE HARNESS
OK -- Continue to next step.

6. CHECK COMBINATION METER

(a) Connect the connectors to the combination meter.





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

(c) Turn the ignition switch on (IG).

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

Standard voltage:





NG -- REPLACE COMBINATION METER

OK -- REPLACE CENTER AIRBAG SENSOR ASSEMBLY