Inspection Procedure 3

Engine Cranks, but does not Start.

TECHNICAL DESCRIPTION
If the engine cranks, but does not start, an MFI system problem may exist in addition to a malfunctioning immobilizer system. The engine will not start if the ignition key has not been properly registered.

TROUBLESHOOTING HINTS
- Malfunction of MFI system
- Malfunction of immobilizer-ECU

DIAGNOSIS

Required Special Tools:
- MB991502: Scan Tool (MUT-II)
- MB991958: Scan Tool (MUT-III Sub Assembly)
- MB991824: V.C.I.
- MB991827: USB Cable
- MB991911: Main Harness B

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

Q: Is the voltage 8 volts or more?

YES: Go to Step 2.

NO: Check the condition of the battery.

STEP 2. Using scan tool MB991502 or MB991958, read the MFI system diagnostic trouble code (DTC).

CAUTION: To prevent damage to scan tool MB991502 or MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991502 or MB991958.







1. Connect scan tool MB991502 or MB991958 to the data link connector.
2. Turn the ignition switch "ON" position.
3. Read the diagnosis code.

Q: Have any DTCs set?

YES: Go to Step 3.

No: Go to Step 5.

STEP 3. Check for immobilizer system DTCs.

Q: Have any immobilizer system DTCs set?

YES: Refer to Diagnostic Trouble Code Chart.

NO: Go to Step 4.

STEP 4. Check for MFI system DTCs.

Q: Have any MFI system DTCs set?

YES: Refer to Diagnosis.

NO: Go to Step 5.

STEP 5. Attempt to start the engine.

Q: Does the engine start?

YES: The procedure is complete (If no malfunctions are found in all steps, an intermittent malfunction is suspected. Refer to How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction).

NO: Refer to Diagnosis - Symptom Chart. If the malfunction is not resolved, replace the immobilizer-ECU. Then register the password (secret code) and encrypted code. The engine should now start.