Inspection Procedure 4

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

DIAGNOSIS

Required Special Tools:
- MB991223: Harness Set
- MB991502: Scan Tool (MUT-II)

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: Diagnostic Trouble Code Descriptions
MFI system DTC: Refer to Computers/Testing.
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 Computers/Testing/Diagnosis by Symptom/Symptom Chart. 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 How to Use Troubleshooting/Inspection Service Points-How to Cope with Intermittent Malfunction.)

NO: Replace the immobilizer-ECU.