DIAGNOSTIC ITEM 12: Diagnose when the scan tool cannot receive the data sent by WCM.: Diagnosis

Required Special Tools: 

• MB991223: Harness Set
• MB992006: Extra Fine Probe

1. STEP 1. Check joint connector (CAN1) C-06 and WCM connector C-09 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 SERVICE PRECAUTIONS .

   Q: Are joint connector (CAN1) C-06 and WCM connector C-09 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-06 and WCM connector C-09  .
   CAUTION: Strictly observe the specified wiring harness repair procedure. For details refer to SERVICE PRECAUTIONS .
   1. Disconnect joint connector (CAN1) C-06 and WCM connector C-301, and check the wiring harness.
   2. Check the wiring harness between joint connector (CAN1) C-06 (terminal 5) and WCM connector C-09 (terminal 11)
   3. Check the wiring harness between joint connector (CAN1) C-06 (terminal 16) and WCM connector C-09 (terminal 10)

   Q: Is the wiring harness between joint connector (CAN1) C-06 and WCM connector C-09 in good condition? 

   YES  : Check the power supply circuit of the WCM. Refer to DIAGNOSIS .

   NO  : Repair the wiring harness between joint connector (CAN1) C-06 and WCM connector C-09.