DTC 34

Connector Lock System Detects Connector Unlocked

DTC SET CONDITIONS
This DTC is set if a poor connection at the SRS-ECU is detected. However, if the vehicle condition returns to normal, the DTC 34 will be automatically erased, and the SRS warning light will go out.

TROUBLESHOOTING HINTS
- Improper engaged connector
- Damaged connectors Malfunction of the SRS-ECU

DIAGNOSIS

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




STEP 1. Check the SRS-ECU connectors C-137 /C-137 and C-145 .

Q: Are the connectors correctly engaged?

YES: Go to Step 2.
NO: Engage the connectors correctly. Then go to Step 3.

STEP 2. Check the SRS-ECU connectors C-137 /C-137 and C-145 for damage.




1. Disconnect the SRS-ECU connectors C-137 and C-145.




2. Check the connector lock switch terminal inside the harness side connector for improper contact or deformation.

Q: Are the SRS-ECU connector C-137 and C-145 in good condition?

YES: Erase the DTC memory, and recheck if any DTC sets. If DTC 34 sets, replace the SRS-ECU. Then go to Step 3.
NO: Repair or replace the SRS-ECU connectors C-137, C-145. Harness Connector Inspection. Then go to Step 3.

STEP3.Check for DTC.

Q: Is DTC 34 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 INTRODUCTION, How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction.)