Inspection Procedure 3

Engine Does Not Start (Cranking But No Initial Combustion).

TECHNICAL DESCRIPTION (COMMENT)
If the fuel injectors are not operating, there might be a problem with the MFI system in addition to a malfunction of the immobilizer system. It is normal for this to occur if an attempt is made to start the engine using a key that has not been properly registered.

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

Required Special Tools:
- MB991223: Harness Set
- MB991502: Scan Tool

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

Q: Is the voltage 8 volts or more?

YES: Go to Step 2.

NO: Check the battery. The engine should start.

STEP 2. Check the immobilizer system DTC and MFI system DTC.

Q: Which DTC resets, the immobilizer system DTC or the MFI system DTC?
Immobilizer system DTC.
MFI system DTC : Refer to Diagnosis <2.4L> or Diagnosis <3.0L>.
No DTC : Go to Step 3.

STEP 3. Check the starting system.

Q: Does the engine start?

YES: Go to Step 4.

NO: Refer to Diagnosis - Symptom Chart <2.4L> Diagnosis - Symptom Chart <3.0L>. If a malfunction is not resolved, replace the immobilizer-ECU. Then register the password (secret code) and encrypted code. The engine should start.

STEP 4. Recheck for malfunction.

Q: Is a malfunction eliminated?

YES: This diagnosis is complete. (If no malfunction are not found in all steps, an intermittent malfunction is suspected. Refer to INTRODUCTION, How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction.)

NO: Replace the immobilizer-ECU.