DIAGNOSTIC ITEM 18: Diagnose when the scan tool cannot receive the data sent by KOS-ECU < vehicles with KOS >: Diagnosis

Required Special Tools: 

• MB991223: Harness Set
• MB992006: Extra Fine Probe

1. STEP 1. Check joint connector (CAN1) C-06 and KOS-ECU 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 SERVICE PRECAUTIONS  .

   Q: Are joint connector (CAN1) C-06 and KOS-ECU connector C-31 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-06 and KOS-ECU connector C-31 for open circuit. 
   CAUTION: Strictly observe the specified wiring harness repair procedure. For details, refer to SERVICE PRECAUTIONS  .
   1. Disconnect joint connector (CAN1) C-06 and KOS-ECU connector C-31, and check the wiring harness.
   2. Check the wiring harness between joint connector (CAN1) C-06 (terminal 5) and KOS-ECU connector C-31 (terminal 1)

      OK: Continuity exists (2 Ω or less) 

      Fig 1: Checking Wiring Harness Between Joint Connector (CAN1) C-06 (Terminal 5) And KOS-ECU Connector C-31 (Terminal 1)

      Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
   3. Check the wiring harness between joint connector (CAN1) C-06 (terminal 16) and KOS-ECU connector C-31 (terminal 2)

      OK: Continuity exists (2 Ω or less) 

   Q: Is the wiring harness between joint connector (CAN1) C-06 and KOS-ECU connector C-31 in good condition? 

   1. YES:  Check the power supply circuit of the KOS-ECU. Refer to DIAGNOSIS .
   2. NO:  Repair the wiring harness between joint connector (CAN1) C-06 and KOS-ECU connector C-31.
      Fig 2: Checking Wiring Harness Between Joint Connector (CAN1) C-06 (Terminal 16) And KOS-ECU Connector C-31 (Terminal 2)

      Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.