Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSMITSUBISHI2007ENDEAVOR SE, FWDREPAIR AND DIAGNOSIS (SINGLE PAGE)BODY & FRAMEIGNITION SWITCH/STEERING LOCKCHASSIS ELECTRICALIGNITION SWITCHIMMOBILIZER SYSTEM DIAGNOSISSYMPTOM PROCEDURESINSPECTION PROCEDURE 1: COMMUNICATION WITH SCAN TOOL MB991958 IS IMPOSSIBLEDIAGNOSIS

2007 Mitsubishi Endeavor SE, FWD

Inspection Procedure 1: Communication With Scan Tool MB991958 Is Impossible: Diagnosis

2007 Mitsubishi Endeavor SE, FWDSECTION Diagnosis

Required Special Tools:

MB991223: Harness Set
MB992006: Extra Fine Probe
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 (Vehicles with CAN communication system)

STEP 1. Using scan toll MB991958, read the MFI system 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 MB991958.

Use scan tool MB991958 to confirm the MFI system DTC.
1. Connect scan tool MB991958 to the data link connector.
2. Turn the ignition switch "ON" to position.
3. Read the MFI system diagnosis code.
  NOTE: If the scan tool MB991958 cannot communicate with the MFI system, refer to SYMPTOM PROCEDURES .
Q: Is an MFI system DTC P0513 output?

YES : Refer to DTC P0513: IMMOBILIZER MALFUNCTION .

NO : Go to Step 2.

Fig 1: Connecting Scan Tool To Data Link Connector
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
STEP 2. Check the immobilizer-ECU power supply circuit by backprobing.
1. Do not disconnect immobilizer-ECU connector C-39.
2. Turn the ignition switch to the "ON" position.
  
  Fig 2: Identifying Connector C-39 Terminals
  Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
3. Measure the voltage between terminal 1 and ground by backprobing.
  - The voltage should measure approximately 12 volts (battery positive voltage).
Q: Is the measured voltage approximately 12 volts (battery positive voltage)?

YES : Go to Step 5.

NO : Go to Step 3.

Fig 3: Measuring Voltage Between Terminal No. 5 And Ground
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
STEP 3. Check immobilizer-ECU connector C-39 and MFI relay connector B-15X for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q: Are immobilizer-ECU connector C-39 and MFI relay connector B-15X in good condition?

YES : Go to Step 4.

NO : Repair or replace the component(s). Refer to HARNESS CONNECTOR INSPECTION . Confirm that scan tool MB991958 communicates normally.

Fig 4: Identifying MFI Relay Connector B-15X
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.