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

DIAGNOSIS

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 reregister 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.