Accord Coupe Not Starting Key Light Flashing "IMMOBILISER"

[hughezee]

Simple test procedure to diagnose a possible faulty immobiliser unit on your 1998-2002 Accord Coupe, however its strongly recommended diagnosis is carried out with a Honda Scanner Tool

1. Disconnect the 5P connector (A) from the immobilizer receiver unit (B).

2. Check for voltage between no.1 terminal and body ground. You should see battery voltage.

3. Check for continuity between the no.4 terminal and body ground. You should see continuity.

4. Check for continuity between the no.2 terminal and the ECU. You should see continuity between the terminal and ECU (red wire, A25 at the ECU).

5. Check for continuity between the no.3 terminal and the ECU. You should see continuity between the terminal and ECU (blue wire, A13 at the ECU).

If you get to any of these steps and don't see the required voltage or continuity, its advisable to check the system again with a spare key or the corresponding fuses before condemning the unit itself?

Also see above image of the wiring diagram should you wish to trace a fault in the system or bypass the unit

[Brett]

Great write up Stu