Keyless Access System Symptom Troubleshooting Information

Keyless Access System Symptom Troubleshooting Information

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

Normal operation:

When pressing the engine start/stop button to select the ON mode and the immobilizer code is identified, the immobilizer indicator quickly flashes once.

Immobilizer code is not identified:

When pressing the engine start/stop button to select the ON mode but the immobilizer code is not identified, the immobilizer indicator comes on for 2 seconds, then blinks until the OFF mode is selected. 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.

When in the OFF mode, the immobilizer indicator will blink 10 times to signal that until has reset correctly, then the immobilizer indicator will go off.

Immobilizer indicator does not come on:

If the immobilizer indicator does not come on after pressing the engine start/stop button to select the ON mode, there is an open or short in the F-CAN lines between the PCM and the gauge control module. Watch the malfunction indicator lamp (MIL). If the MIL stays on, go to the PGM-FI system troubleshooting. MIL Circuit Troubleshooting

Immobilizer indicator does not go off:

If the immobilizer indicator does not go off after pressing the engine start/stop button to select the ON mode, do the gauge control module self-diagnostic function. Reading and Clearing Diagnostic Trouble Codes If the indicator drive circuit is OK, do the SYSTEM CHECK and STATUS LOG CHECK with the HDS.

2. General check before troubleshooting.
Before troubleshooting the keyless access system, check the following items and solve any if applicable issues.

- Check the No. 3-1 (IG MAIN) (50 A) fuse and the No. 15 (10 A) in the under-hood fuse/relay box.

- Check the No. 9 (20 A) fuse in the driver's under-dash fuse/relay box.

- Check for poor connection at the power control unit and the keyless access control unit.

- Check the DTCs with the HDS, if there is a DTC indicated, troubleshoot the DTC first.

- Before testing, troubleshoot the keyless access system first using SELF CHECK, and if any malfunction is found, troubleshoot it first.

- Make sure the remote is not in a purse with coins, wrapped with any metal material, placed near a mobile phone or computer.

- Make sure the vehicle battery is fully charged.

- Make sure the remote batteries are not low; if they are, replace the battery.

- Make sure a different remote is not being used; only use an Acura-approved remote.

- Make sure the remote is not attached to a key ring or key case, if it is, 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.

3. System Checks.
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 (Keyless Access Control Unit)





System Check 2 (Keyless Access Control Unit)





System Check (Remote Slot Control Unit)





4. Status Log.
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 log number with the highest count first. If no counts are listed, the keyless access system is OK. Continue with normal symptom troubleshooting.

Status Log (Keyless Access Control Unit)





Status Log (Remote Slot Control Unit)