Symptom Troubleshooting Information

The immobilizer and keyless access system condition can be checked by the immobilizer indicator lighting pattern.

Normal operation: 

When the ignition switch is turned ON (II) and the immobilizer code is identified, the immobilizer indicator comes on for 2 seconds, then goes off.

The immobilizer indicator blinks five times when the ignition switch is turned OFF.

+B line open: 

When the ignition switch is turned ON (II) and the immobilizer code is identified, the immobilizer indicator comes on for 2 seconds, then goes off.

The immobilizer indicator goes off when the ignition switch is turned OFF.

Immobilizer code is not identified: 

When the ignition switch is turned ON (II) but the immobilizer code is not identified, the immobilizer indicator comes on for 2 seconds, then blinks. The state of the keyless registration and IMOCD (S-net) line can be checked by doing a system check and status log checks with the HDS. The immobilizer indicator goes off when the ignition switch is turned OFF.

Immobilizer indicator does not come on: 

If the immobilizer indicator does not come on when the ignition switch is turned ON (II), check for an open in the wire shown:

• When the built-in key is used:
  • Check for continuity between the immobilizer control unit-receiver and the keyless access control unit
  • Check for power to the keyless access control unit IG1 and IG2 line.
  • Check for continuity between the immobilizer control unit-receiver and the gauge control module (IMOLMP line).
• When the remote is used:
  • Check for power to the keyless access control unit IG1 and IG2 line.
  • Check for continuity between the immobilizer control unit-receiver and the gauge control module (IMOLMP line).
  • Check for continuity between the keyless access control unit and body ground.

Immobilizer indicator does not go off: 

If the immobilizer indicator does not go off after the ignition switch is turned ON (II), check for a short in the wire shown:

• Check for continuity between the immobilizer control unit-receiver and the gauge control module.
• Check for continuity between the keyless access control unit and the gauge control module.

If a malfunction occurs in the immobilizer or keyless access system circuit power supply and ground lines, identify the lines to check with this table:

Fig 1: Symptom Troubleshooting Chart

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Before troubleshooting the keyless access system, verify the following items and solve it if applicable.

• Check the DTCs with the HDS, if the DTC is indicated, troubleshoot the DTC first.
• Make sure the remote is not in a purse with coins, wrapped with any metal material, place near a mobile phone or computer.
• Make sure the vehicle battery is fully charged.
• Make sure the remote batteries are not low; replace the battery.
• Make sure a different remote is not being used; only use the Acura-approved key.
• Make sure the remote is not attached to a key ring or key case, remove the key from it.
• Make sure aftermarket accessories are not installed: remove any aftermarket accessories.
• Make sure aftermarket accessories are not connected to the IMOCD (S-NET) line: disconnect any aftermarket accessories from the IMOCD (S-NET) line.
• Make sure there is no electrical interference nearby: avoid areas with electrical interference.

• Connect the HDS to the data link connector, then turn the ignition switch ON (II) with the remote.
• Check the system checks 1 and 2 and status log by the HDS.
• Check the DTCs

If a System Check 1 or 2 result is indicated on the display of the HDS, troubleshoot the items based on these Check tables.

System Check 1 

System Check 2 

If the symptom does not occur again during the symptom check, check the Status Log with the HDS, and troubleshoot the items based on this table:

Check the status log count. Troubleshoot the status with the highest count first. If no counts are listed, the keyless access system is OK. Continue with normal symptom troubleshooting.