B2504

B2504 WARNING LAMP FAULT - SHORT TO GND OR BULB OPEN

CIRCUIT DESCRIPTION
The SRS warning lamp is located in the cluster. When the airbag system is normal, the SRI flashes for approx. 6 seconds after the ignition switch is turned ON, and then turns off automatically. If there is a malfunction in the airbag system, the SRI lights up to inform the driver of the abnormality. The SRSCM shall measure the voltage at the airbag SRI (Malfunction Indicator Lamp) output pin, both when the lamp is on and when the lamp is off, to detect whether the commanded state matches the actual state.

INSPECTION PROCEDURE
1. Check the fuse.

[PREPARATION]
1. Remove airbag fuse and airbag warning lamp fuse from the junction block.
2. Inspect the state of the fuses.
3. Replace if necessary.
2. Check the SRS warning lamp circuit.

[PREPARATION]
1. Connect the negative (-) terminal cable to the battery.
2. Turn the ignition switch to ON.

[CHECK]
1. Measure voltage at the harness side connector of the SRSCM.

Voltage: 9 - 16V

[NG]-> Check the SRS warning light bulb/repair the SRS warning light circuit.

[OK]->

2. Check the SRS SRI (Service Reminder Indicator).

[OK]-> SRS SRI ON

[NG]-> If no fault is found in wiring or connector, replace the SRSCM.

[OK]->
From the results of the above inspection, the pan can now be considered to be normal.