DTC 34: Connector Lock System Detects Connector Unlocked: 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

1. 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.

   Fig 1: Checking SRS-ECU Connector C-12, C-13

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
2. 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 (Refer to SRS CONTROL UNIT (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.

   Fig 2: Disconnecting SRS-ECU Connectors C-12 And C-13

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
   Fig 3: Identifying SRS-ECU Harness Connectors

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
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 COPE WITH INTERMITTENT MALFUNCTION ).

   Fig 4: Connecting Scan Tool To Data Link Connector

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.