Diagnostic Trouble Code Procedures: Diagnosis

Required Special Tools: 

• MB991223: Harness Set
• MB991958: Scan Tool (MUT-III Sub Assembly)
  • MB991824: Vehicle Communication Interface
  • MB991827: MUT-III USB Cable
  • MB991911: MUT-III Main Harness B
• MB991529: Diagnostic Trouble Code Check Harness

1. STEP 1. Check the solenoid valve and motor 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. Measure the voltages between terminal 18 and ground, and 17 and ground.
      Fig 1: Measuring Voltages

      Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

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

   • YES:  Replace the hydraulic unit (integrated with ABS-ECU). (Refer to HYDRAULIC UNIT .) Then go to  Step 3 .
   • NO:  Go to Step 2.
2. STEP 2. Check the harness wire between the relay box fusible link number 3 and the ABS-ECU connector A-02 (terminals 17 and 18). 
   NOTE: After inspecting the intermidiate connector C-05, inspect the wires. If the intermediate connector C-05 is damaged, repair or replace it. Refer to HARNESS CONNECTOR INSPECTION . If the connector has been repaired or replaced, go to Step 3.
   Fig 2: Identifying Connector C-05

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
   Fig 3: Identifying Relay Box Fusible Link Number 3

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
   Fig 4: Identifying Connector A-02

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

   Q: Is any of the harness wires between the relay box fusible link number 3 and the ABS-ECU connector A-02 (terminals 17 and 18) damaged? 

   • YES:  Repair it and then go to Step 3.
   • NO:  Go to Step 3.
3. STEP 3. Recheck for diagnostic trouble codes. 

   Q: Does any of the diagnostic trouble codes 31, 32, 33, 34, 41, 42, 43, 44, 45, 46, 47, 48, 51, or 53 reset? 

   • YES:  Return to  Step 1 .
   • NO:  This diagnosis is complete.