DTC 34

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, DTC number 34 will be automatically erased, and the SRS warning light will switch off.

TROUBLESHOOTING HINTS
- Damaged connectors
- Malfunction of the SRS-ECU

DIAGNOSIS

Required Special Tools:
- MB991958: Scan Tool (M.U.T.-III Sub Assembly)
- MB991824: V.C.I.
- MB991827: M.U.T.-III USB Cable
- MB991911: M.U.T.-III Main Harness B




STEP 1. Check the SRS-ECU connector C-12, C-13.

Q: Are connectors correctly engaged?

YES: Go to Step 2.

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

STEP 2. Check SRS-ECU connector C-12, C-13 for damage.







1. Disconnect SRS-ECU connectors C-12 and C-13.
2. Check the connector lock switch terminal inside the harness side connector for improper contact or deformation.

Q: Are the SRS-ECU connector C-12, C-13 in good condition?

YES: Erase the diagnostic trouble code memory, and check the diagnostic trouble code. If DTC 34 sets, replace the SRS-ECU. Then go to Step 3.

NO: Repair or replace the SRS-ECU connector C-12, C-13. (Refer to Harness Connector Inspection.) Then go to Step 3.

STEP 3. Recheck the diagnostic trouble code.
Check again if the DTC is set.




1. Erase the DTC.
2. Turn the ignition switch to the "ON" position.
3. Check if the DTC is set.
4. Turn the ignition switch to the "LOCK" (OFF) position.

Q: Is DTC 34 set?

YES: There is no action to be taken.

NO: The procedure is complete (If no malfunctions are found in all steps, an intermittent malfunction is suspected. Refer to How to Use Troubleshooting/INSPECTION Service Points - How to Cope with Intermittent Malfunction).