INSPECTION PROCEDURE 1: Communication between the Scan Tool and the ABS-ECU is not Possible.: Diagnosis

Required Special Tool:

• MB991223: Harness Set

1. Check the power supply circuit at the ABS-ECU connector A-02.
   1. Disconnect the ABS-ECU connector A-02 and measure at the harness side.
   2. Start the engine.
   3. Measure the voltage between terminal 15 and ground.
      Fig 1: Checking Power Supply Circuit At ABS-ECU Connector A-02

      Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

   Q: Is the voltage approximately 12 volts (battery positive voltage)?

   YES : Go to Step 3.

   NO : Go to Step 2.

2. Check the harness wire between the ignition switch (IG2) and the ABS-ECU connector A-02 (terminal 15).
   Fig 2: Identifying Intermediate Connector C-94

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
   Fig 3: Identifying Intermediate Connectors C-111 And C-112

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
   NOTE: After inspecting the intermediate connectors C-94, C-111 and C-112, inspect the wire. If the intermediate connector C-94, C-111, or C-112 is damaged, repair or replace it. Refer to HARNESS CONNECTOR INSPECTION . If the connector has been repaired or replaced, go to Step 5.
   Fig 4: Identifying ABS-ECU Connector A-02

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

   Q: Is the harness wire between the ignition switch (IG2) and the ABS-ECU connector A-02 (terminal 15) damaged?

   YES : Repair it and go to Step 5.

   NO : Go to Step 3.

3. Check the harness wires between the ABS-ECU connector A-02 (terminals 11 and 12) and the data link connector C-29 (terminals 1 and 7).
   Fig 5: Identifying Intermediate Connector C-77

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
   Fig 6: Identifying Intermediate Connector C-94

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
   NOTE: After inspecting the intermediate connectors C-77 and C-94, inspect the wires. If the intermediate connector C-77 or C-94 is damaged, repair or replace it. Refer to HARNESS CONNECTOR INSPECTION . If the connector has been repaired or replaced, go to Step 5.
   Fig 7: Identifying ABS-ECU Connector A-02

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
   Fig 8: Identifying Data Link Connector C-29

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

   Q: Is any of the harness wires between the ABS-ECU connector A-02 (terminals 11 and 12) and the data link connector C-29 (terminals 1 and 7) damaged?

   YES : Repair it and go to Step 5.

   NO : Go to Step 4.

4. Check the harness wires between the ABS-ECU connector A-02 (terminals 16, 19 and 30) and ground.
   Fig 9: Identifying ABS-ECU Connector A-02

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

   Q: Is any of the harness wires between the ABS-ECU connector A-02 (terminals 16, 19 and 30) and ground damaged?

   YES : Repair it and then go to Step 5.

   NO : Replace the hydraulic unit (integrated with ABS-ECU) (Refer to HYDRAULIC UNIT .) and then go to Step 5.

5. Check symptom.

   Q: Does the scan tool communicate with the TCL system?

   YES : This diagnosis is complete.

   NO : Return to Step I.