DIAGNOSTIC ITEM 18: Diagnose when the scan tool cannot receive the data sent by occupant classification-ECU: Diagnosis

WARNING: This page is about a different car, the 2008 Mitsubishi Lancer. However, it is still accessible from the selected car via links, so may be relevant.

Required Special Tools:

MB991223: Harness Set
MB992006: Extra Fine Probe

STEP 1. Check joint connector (CAN1) C-105, occupant classification-ECU connector D-39, D-39-2 and intermediate connector C-41 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, occupant classification-ECU connector D-39, D-39-2 and intermediate connector C-41 in good condition?

YES : Go to Step 2.

NO : Repair the damaged parts.
STEP 2. Check the wiring harness between joint connector (CAN1) C-105 and occupant classification-ECU connector D-39-2 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 occupant classification-ECU connector D-39-2, and check the wiring harness.
2. Check the wiring harness between joint connector (CAN1) C-105 (terminal 11) and occupant classification-ECU connector D-39-2 (terminal 24)
  
  Fig 1: Checking Wiring Harness Between Joint Connector (CAN1) And OCU Connector Terminals
  Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
  
  OK: Continuity exists (2 Ω or less)
3. Check the wiring harness between joint connector (CAN1) C-105 (terminal 24) and occupant classification-ECU connector D-39-2 (terminal 25)
  
  Fig 2: Checking Wiring Harness Between Joint Connector (CAN1) And OCU Connector Terminals
  Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
  
  OK: Continuity exists (2 Ω or less)
Q: Is the wiring harness between joint connector (CAN1) C-105 and occupant classification-ECU connector D-39-2 in good condition?

YES : Check the power supply circuit of the occupant classification-ECU. Refer to SRS AIR BAG DIAGNOSIS .

NO : Repair the wiring harness between joint connector (CAN1) C-105 and occupant classification-ECU connector D-39-2.