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

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 TEST EQUIPMENT .

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.
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 TEST EQUIPMENT .
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 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 TROUBLE SYMPTOM CHART .
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 C-06 Terminal 16 And KOS-ECU Connector C-31 Terminal 2
  Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.