Applies to: 2001-’04 Honda Civic
Got a 2001-’04 Civic in your shop with any or all of these symptoms?
The engine cranks but it won’t start.
The MIL comes on.
The immobilizer indicator blinks while the engine cranks.
The HDS can’t communicate with the ECM/PCM.
Check for loose alternator bolts. If these bolts are loose for any reason such as the alternator was R&R’ed, or an accessory A/C was installed on a DX model at the dealership, the alternator can overcharge and fry the ECM/PCM.
If the alternator bolts are loose, tighten them and try restarting the engine. If the engine still won’t start, then check the ECM/PCM connector for battery voltage and ground. If you’re reading battery voltage and ground at the connector, then replace the ECM/PCM. Keep in mind, though, any ECM/PCM damage that’s caused by loose alternator bolts from A/C installation or body repair isn’t covered under warranty.
Courtesy of Honda Service News via ALLDATA.
Underhood Service Staff Writers
Latest posts by Underhood Service Staff Writers (see all)
- VIDEO: Variable Valve Timing Actuator Service - Oct 26, 2016
- MAHLE Original GM LS Exhaust Manifold Gasket Set Features MLS Construction - Oct 26, 2016
- Gates Corp. Welcomes Sarah Burgess For Meet & Greet At AAPEX - Oct 26, 2016