INSPECTION PROCEDURE 4: The Active skid control system OFF indicator light remains illuminated after the engine is started.: Diagnosis

Required Special Tool:

MB991223: Harness Set

STEP 1. Check the Active skid control system OFF indicator light drive circuit at M-ASTC-ECU connector E-121 terminal.
1. Disconnect M-ASTC-ECU connector E-121.
2. Turn the ignition switch to the "ON" position.
Fig 1: Identifying Connector E-121
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

Q: Does the indicator light turn off?
1. YES: Replace the M-ASTC-ECU and then go to Step 3.
2. NO: Go to Step 2.
STEP 2. Check the harness wires between combination meter connector D-03 terminal 51 and M-ASTC-ECU connector E-121 terminal 82.
NOTE: After inspecting combination meter connector combination meter connector D-03, intermediate connector E-122 and M-ASTC-ECU connector E-121, inspect the wire. If combination meter connector D-03, intermediate connector E-122 and M-ASTC-ECU connector E-121 are damaged, repair or replace them. Refer to HARNESS CONNECTOR INSPECTION . Then go to Step 3.

Fig 2: Identifying Connector D-03
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

Fig 3: Identifying Connector E-121
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

Fig 4: Identifying Connector E-122
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

Q: Is the harness wire between combination meter connector D-03 terminal 51 and M-ASTC-ECU connector E-121 terminal 82 damaged?
1. YES: Repair it and then go to Step 3.
2. NO: Replace the combination meter (printed circuit board) and then go to Step 3.
STEP 3. Retest the system.
Q: Does the Active skid control system OFF indicator light turn off 3 seconds after start-up?
1. YES: The procedure is complete.
2. NO: Return to Step 1.