Inspection Procedure 2

Registering The Ignition Key Is Impossible.

TECHNICAL DESCRIPTION (COMMENT)
The transponder built-in ignition key or the immobilizer-ECU is suspected to be defective.

TROUBLESHOOTING HINTS
- Malfunction of ignition key
- Malfunction of immobilizer-ECU

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

STEP 1. Check the DTC 11.

Q: Does DTC 11 reset?

YES: Refer to DTC 11.

NO: Replace the ignition key that cannot be registered. Then re-register the encrypted code. Check that the ignition key can be registered. Then Go to Step 2.

STEP 2. 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.