Ignition System: Testing and Inspection
Ignition Coil Relay Circuit TroubleshootingNOTE: If the vehicle does not start, and there is no voltage on the BLK/WHT wire of the ignition coils, then do this troubleshooting.
1. Check the No.46 (15A) fuse in the under-hood fuse/relay box and No.8 (15A) fuse in the under-hood subfuse box.
Are the fuse(s) OK?
YES - Go to step 2.
NO - Replace the fuse (s).
2. Remove the ignition coil relay from the relay block and test it.
Is the relay OK?
YES - Go to step 3.
NO - Replace the ignition coil relay.
3. Measure the voltage between ignition coil relay 4P socket terminal No.1 and body ground.
Is there battery voltage?
YES - Go to step 4.
NO - Repair an open in the wire between ignition coil relay 4P socket terminal No.1 and the under-hood subfuse box.
4. Measure the voltage between ignition coil relay 4P socket terminal No.4 and body ground.
Is there battery voltage?
YES - Go to step 5.
NO - Repair an open in the wire between ignition coil relay 4P socket terminal No.4 and the under-hood fuse/relay box.
5. Check for continuity between ignition coil relay 4P socket terminal No.2 and No.1 ignition coil 3P connector terminal No.3.
Is there continuity?
YES - Go to step 6.
NO - Repair an open in the wire between ignition coil relay 4P socket terminal No.2 and ignition coil 3P connector terminal No.3.
6. Check for continuity between ignition coil relay 4P socket terminal No.3 and body ground.
Is there continuity?
YES - Repair a short in the wire between ignition coil relay 4P socket terminal No.3 and PCM.
NO - Repair an open in the wire between ignition coil relay 4P socket terminal No.3 and PCM.