Inspection Procedure 3: When The Ignition Key Is Turned To "On" (Engine Stopped), The Brake/Abs Warning Light Does Not Illuminate; Inspection Procedure 4: The Brake/Abs Warning Light Remains Illuminated After The Engine Is Started: Diagnosis

Required Special Tools: 

• MB991958: Scan Tool (M.U.T.-III Sub Assembly)
  • MB991824: Vehicle Communication Interface (V.C.I.)
  • MB991827: M.U.T.-III USB Cable
  • MB991910: M.U.T.-III Main Harness A

1. STEP 1. Using scan tool MB991958, diagnose the CAN bus line. 
   CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.

   Use scan tool MB991958 to diagnose the CAN bus lines.

   1. Connect scan tool MB991958 to the data link connector.
   2. Turn the ignition switch to the "ON" position.
   3. Diagnose the CAN bus line.

   Q: Is the check result satisfactory? 

   YES:  Go to Step 2.

   NO:  Repair the CAN bus lines (Refer to CAN BUS DIAGNOSTICS TABLE ). Repair the CAN bus lines, and then go to Step 2.

   Fig 1: Connecting Special Tool To Data Link Connector

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
2. STEP 2. Using scan tool MB991958, read the combination meter diagnostic trouble code. 
   CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.

   Use scan tool MB991958 to check whether combination meter DTC U1102 has been set.

   1. Connect scan tool MB991958 to the data link connector.
   2. Turn the ignition switch to the "ON" position.
   3. Check whether combination meter DTC U1102 has been set.

   Q: Is combination meter DTC U1102 set? 

   YES:  Replace the hydraulic unit (integrated with ABS-ECU).

   NO:  Replace the combination meter.

   Fig 2: Connecting Special Tool To Data Link Connector

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.