Diagnosis Procedure

Required Special Tools:

MB991223: Harness Set
MB991958: Scan Tool (MUT-III Sub Assembly)
- MB991824: Vehicles Communication Interface (V.C.I.)
- MB991827: MUT-III USB Cable
- MB991911: Main Harness A

STEP 1. Check the battery voltage.
Measure the battery voltage during cranking.

Q: Is the voltage 8 volts or more?
1. YES : Go to Step 2.
2. NO : Check the condition of the battery. Refer to BATTERY CHECK .
STEP 2. Using scan tool MB991958, read the diagnostic trouble code.
CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to "LOCK" (OFF) position before connecting or disconnecting scan tool.
1. Connect scan tool MB991958 to the data link connector.
2. Turn the ignition switch "ON" position.
3. Read the diagnosis code.
Q: Have any DTCs set?
1. YES : Refer to DTC 11: TRANSPONDER COMMUNICATION SYSTEM OR RADIO INTERFERENCE OF ENCRYPTED CODE .
2. NO : Go to Step 3.
Fig 1: Connecting Scan Tool To Data Link Connector
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
STEP 3. Using scan tool MB991958, read the diagnostic trouble code.
CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to "LOCK" (OFF) position before connecting or disconnecting scan tool.
1. Connect scan tool MB991958 to the data link connector.
2. Turn the ignition switch "ON" position.
3. Read the diagnosis code.
Q: Have any MFI system DTCs set?
1. YES : Refer to DIAGNOSIS .
2. NO : Go to Step 4.
Fig 2: Connecting Scan Tool To Data Link Connector
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
STEP 4. Attempt to start the engine.
Q: Does the engine start?
1. YES : The procedure is complete (If no malfunctions are found in all steps, an intermittent malfunction is suspected. Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTION ).
2. NO : Refer to SYMPTOM CHART . If the malfunction is not resolved, replace the immobilizer-ECU. Then register the password (secret code) and encrypted code (Refer to HOW TO REGISTER ENCRYPTED CODE ). The engine should now start.