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 the ignition switch is turned to 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 to LOCK (0).
+B line open:
When the ignition switch is turned to 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 to LOCK (0).
Immobilizer code is not identified:
When the ignition switch is turned to 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 to LOCK (0).
Immobilizer indicator does not come on:
If the immobilizer indicator does not come on when the ignition switch is turned to 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.
NOTE: If the ignition switch is faulty (a short to power in the wire), the immobilizer code identification is not performed, so the indicator does not come on. But the engine is able to start in this condition.
Immobilizer indicator does not go off:
If the immobilizer indicator does not go off after the ignition switch is turned to ON (II), check for a short in the red wire between the gauge control module and the immobilizer control unit-receiver/keyless access control unit.
2. Symptom troubleshooting for an open power supply and ground circuit.
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:
3. General check before troubleshooting.
Before troubleshooting the keyless access system, verify the following items, and solve it if applicable.
- Check for DTCs with the HDS, if there is a DTC indicated, troubleshoot the DTC first.
- Make sure the remote is not in a purse with coins, wrapped with any metal material, or 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 the Acura-approved key.
- 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.
4. How to troubleshoot without the built-in key.
- Connect the HDS to the data link connector, then turn the ignition switch to ON (II) with the remote.
- Check the system checks 1 and 2 and status log with the HDS.
- Check for DTCs
5. 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
System Check 2
6. 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 with the highest count first. If no counts are listed, the keyless access system is OK. Continue with normal symptom troubleshooting.
