DTC 44

SRS Warning Light Drive Circuit System Fault 2

SRS Warning Light Drive Circuit Part 1:

CIRCUIT OPERATION
- Power for the SRS warning light is supplied from the ignition switch (IG1).
- The SRS warning light illuminates when the ignition switch is turned to the "ON" position and goes out after approximately seven seconds if there is not a malfunction in the SRS system.

DTC SET CONDITIONS
- This DTC is set under one of the following cases while the SRS-ECU is monitoring the warning light drive circuit.
- When a short circuit occurs in the warning light drive circuit.
- When a malfunction is detected in the output transistor inside the SRS-ECU.
However, if the vehicle condition returns to normal, DTC 44 will be automatically erased, and the SRS warning light will go out.

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

DIAGNOSIS

Required Special Tool:
- MB991502: Scan Tool (MUT-II)

STEP 1. Check the SRS warning light drive circuit system.

Q: Is the SRS warning light drive circuit normal?

YES: Erase the DTC memory and check for the diagnostic trouble code. If DTC 43 is set, replace the SRS-ECU. Then go to Step 2.

STEP 2. Check for the diagnostic trouble code.

Q: Is DTC 44 set?

YES: There is no action to be taken.

NO: The procedure is complete (If no malfunctions are not found in all steps, an intermittent malfunction is suspected. Refer to How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction).