SRS Warning Light Drive Circuit System Fault 1 (Light Does Not Switch Off)

DTC 43 - SRS warning light drive circuit system (Light does not switch off)

DTC 43, 44 - SRS Warning Light Drive Circuit:

Connector - C-02, C-04, C-24, D-06, D-08, D-13:

CIRCUIT OPERATION
Power for the SRS warning light is supplied from the ignition switch (IG1) circuit.

The SRS warning light illuminates when the ignition switch is turned "ON," and goes out after approximately seven seconds if there is not a malfunction in the SRS system.

The SRS-ECU judges how severe a collision is by detecting signals from the left and right front impact sensors and the analog G-sensor. If the impact is over a predetermined level, the SRS-ECU outputs an ignition signal. At this time, if the safing G-sensor is on, the SRS air bag will inflate.

DTC SET CONDITIONS
This diagnostic trouble code is output when a short to ground occurs in the harness between the SRS warning light and SRS-ECU while SRS-ECU is monitoring the light and the light is ON.

TROUBLESHOOTING HINTS
Damaged wiring harnesses or connectors
- Malfunction of the SRS-ECU
- Malfunction of the combination meter

DIAGNOSIS




STEP 1. Check the SRS warning light
1. Disconnect SRS-ECU connector C-24.
2. Turn the ignition switch "ON."

If the SRS warning light illuminates, go to Step 2.
If the SRS warning light does not illuminate, replace the SRS-ECU. Then go to Step 3.







STEP 2. Check the harness wires between combination meter connector C-02 and SRS-ECU connector C-24
If harness wires are in good condition, go to Step 3. If any harness wires between combination meter connection C-02 and SRS-ECU connector C-24 are damaged, repair them. Then go to Step 3.

STEP 3. Check the diagnostic trouble code
Confirm that the diagnostic trouble code is not output.