Immobilizer System Symptom Troubleshooting Information

Symptom Troubleshooting by the Immobilizer Indicator Lighting Pattern


Immobilizer system condition can be checked by the immobilizer indicator lighting pattern.

Normal operation

If the immobilizer code is identified, the immobilizer indicator comes on for 2 seconds, then goes off after turning the ignition switch ON (II).
The immobilizer indicator does not come on when the ignition switch is turned OFF.

Immobilizer code is not identified

If the immobilizer code is identified, the immobilizer indicator comes on for 2 seconds, then blinks after turning the ignition switch ON (II).
The immobilizer indicator blinks ten times, then goes off when the ignition switch is turned OFF.

Immobilizer indicator does not come on

If the immobilizer indicator does not come on after turning the ignition switch ON (II), an open or short in the F-CAN lines between the ECM/PCM and the gauge control module (tach). Watch the malfunction indicator lamp (MIL). If the MIL stays on, go to the PGM-FI system troubleshooting.

Immobilizer indicator does not go off

If the immobilizer indicator does not go off after turning the ignition switch ON (II), do the gauge control module (tach) self-diagnostic function. If the indicator drive circuit is OK, do the SYSTEM CHECK with the HDS.

General Check before Troubleshooting


Before troubleshooting the immobilizer system, check the following general points and solve any if applicable.

  • Battery is low; charge the battery fully, then troubleshoot the immobilizer system.
  • Ignition key is not a genuine Honda part; use the Honda-approved key blank register the key, then troubleshoot the immobilizer system.
  • Key ring, or keys, or a key case is used; remove the key from it, and troubleshoot the immobilizer system with a key only.
  • Aftermarket electrical part is attached; remove it, then troubleshoot the immobilizer system.

How to Troubleshoot


NOTE: If the HDS does not communicate with the vehicle, go to the DLC circuit troubleshooting.

1.Do the PGM-FI system DTCs check. If there is any DTC, go to the indicated DTC troubleshooting.

2.Do the Body Electrical DTCs check. If there is any DTC, go to the indicated DTC troubleshooting.

3.Do the status check using the HDS. If there is a system check number, do the troubleshooting for the item indicated.

4.Check the status log using HDS. Troubleshoot the line with the highest counts. If all line are ‘‘0'' zero, the problem may not be caused by the immobilizer system, check for ignition or fuel problems.

5.Do the system troubleshooting according to the symptom troubleshooting.

NOTE: Once repaired, clear the status log by removing the back up power fuse, or disconnecting the battery.

Symptom Troubleshooting of an open Power Supply and Ground Circuit


If a malfunction occurs in the immobilizer circuit for the +B, IG and GND (LG) lines, identify the lines to check with this table.