Diagnostic Item 18: Diagnose When The Scan Tool Cannot Receive The Data Sent By Occupant Classification-Ecu: Diagnosis

Required Special Tools: 

• MB991223: Harness Set
• MB992006: Extra Fine Probe

1. STEP 1. Check joint connector (CAN1) C-103, occupant classification-ECU connector D-34, D-34-2 and intermediate connector C-31 for loose, corroded or damaged terminals, or terminals pushed back in the connector. 
   CAUTION: The strand end of the twisted wire should be within 10 cm (4 inches) from the connector. For details, refer to TEST EQUIPMENT .

   Q: Are joint connector (CAN1) C-103, occupant classification-ECU connector D-34, D-34-2 and intermediate connector C-31 in good condition? 

   YES  : Go to Step 2.

   NO  : Repair the damaged parts.

2. STEP 2. Check the wiring harness between joint connector (CAN1) C-103 and occupant classification-ECU connector D-31-2. 
   CAUTION: Strictly observe the specified wiring harness repair procedure. For details, refer to TEST EQUIPMENT .
   1. Disconnect joint connector (CAN1) C-103 and occupant classification-ECU connector C-301, and check the wiring harness.
   2. Check the wiring harness between joint connector (CAN1) C-103 (terminal No. 11) and occupant classification-ECU connector D-31-2 (terminal No. 24)
   3. Check the wiring harness between joint connector (CAN1) C-103 (terminal No. 24) and occupant classification-ECU connector D-31-2 (terminal No. 25)

   Q: Is the wiring harness between joint connector (CAN1) C-103 and occupant classification-ECU connector D-31-2 in good condition? 

   YES  : Check the power supply circuit of the occupant classification-ECU. Refer to TROUBLE SYMPTOM CHART .

   NO  : Repair the wiring harness between joint connector (CAN1) C-103 and occupant classification-ECU connector D-31-2.