Skip to main content
How to Troubleshoot the Immobilizer System

General Check before Troubleshooting
Before troubleshooting the immobilizer system, check the following general items and solve any if applicable:
  • The battery is low; charge the battery fully, then troubleshoot the immobilizer system.
  • The ignition key is not a genuine Honda part; use the Honda-approved key blank, register the key, then troubleshoot the immobilizer system.
  • A key ring, or keys, or a key case is used; remove the key from it, and troubleshoot the immobilizer system with a key only.
  • An aftermarket electrical part is attached; remove it, then troubleshoot the immobilizer system.

Symptom Troubleshooting by the Immobilizer Indicator Lighting Pattern
The pattern of the immobilizer indicator can help troubleshoot the condition of the immobilizer system. Following are descriptions of the four possible patterns:

Normal operation

If the immobilizer code is identified, the immobilizer indicator comes on for 2 seconds, then goes off after turning the ignition switch to ON (II).
The immobilizer indicator does not come on when the ignition switch is turned to LOCK (0).

Immobilizer code is not identified

If the immobilizer code is not identified, the immobilizer indicator comes on for 2 seconds, then blinks after turning the ignition switch to ON (II).
The immobilizer indicator blinks ten times, then goes off when the ignition switch is turned to LOCK (0).

Immobilizer indicator does not come on

If the immobilizer indicator does not come on after turning the ignition switch to ON (II), an open or short in the F-CAN lines between the ECM/PCM and the gauge control module. 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 to ON (II), do the gauge control module self-diagnostic function. If the indicator drive circuit is OK, do the SYSTEM CHECK with the HDS. Before troubleshooting the immobilizer system, check the following general points and solve any if applicable.

Symptom Troubleshooting Using Malfunctioning Circuit Functions
If a malfunction occurs in the immobilizer circuit, use the table to cross-reference the malfunctioning function to the line(s) that should be checked:

System Check
NOTE: The HDS can be used to:
  • Check the state of the immobilizer key registration and the S-NET line by doing a SYSTEM CHECK.
  • Check the number of times the immobilizer-keyless control unit doesn't permit the engine to run by checking the STATUS LOG.
  1. Connect the HDS to the data link connector, then turn the ignition switch to ON (II) and follow the prompts to the MAIN MENU.
    NOTE: If the HDS does not communicate with the vehicle, go to the DLC circuit troubleshooting.
  1. At the MAIN MENU, enter IMMOBILIZER, then select the IMMOBILIZER SETUP.
  1. Check the status log using the HDS. Troubleshooting the line with the highest counts first. If all the lines are ‘‘0'' zero, the problem may not be caused by the immobilizer system, check for ignition or fuel problems.
    NOTE: Once repaired, clear the status log by removing the No. 1 (10 A) fuse in the under-dash fuse/relay box or disconnecting the immobilizer-keyless control unit.