DIAGNOSTIC ITEM 16: 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-105 and WCM connector C-07 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-105 and WCM connector C-07 in good condition? 

   1. YES:  Go to Step 2.
   2. NO:  Repair the damaged parts.
2. STEP 2. Check the wiring harness between joint connector (CAN1) C-105 and WCM connector C-07 for open circuit. 
   CAUTION:

   Strictly observe the specified wiring harness repair procedure. For details refer to SERVICE PRECAUTIONS  .

   1. Disconnect joint connector (CAN1) C-105 and WCM connector C-07, and check the wiring harness.
   2. Check the wiring harness between joint connector (CAN1) C-105 (terminal 9) and WCM connector C-07 (terminal 11)

      OK: Continuity exists (2 Ω or less) 

      Fig 1: Measuring Resistance Between Joint Connector C-105 Terminal 9 & WCM Connector C-07 Terminal 11

      Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
   3. Check the wiring harness between joint connector (CAN1) C-105 (terminal 20) and WCM connector C-07 (terminal 10)

      OK: Continuity exists (2 Ω or less) 

      Fig 2: Measuring Resistance Between Joint Connector C-105 Terminal 20 & WCM Connector C-07 Terminal 10

      Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

      Q: Is the wiring harness between joint connector (CAN1) C-105 and WCM connector C-07 in good condition? 

      1. YES:  Check the power supply circuit of the WCM. Refer to DIAGNOSIS .
      2. NO:  Repair the wiring harness between joint connector (CAN1) C-105 and WCM connector C-07.