Ignition System: Testing and Inspection
Ignition Coil Relay Circuit Troubleshooting1. Check the No. 8 (15 A) fuse in the auxiliary fuse box.
Are the fuse OK?
YES - Go to step 2.
NO - Replace the fuse.
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, then terminal No. 4 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 auxiliary fuse box or terminal No. 4 and the auxiliary fuse box.
4. 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 5.
NO - Repair an open in the wire between ignition coil relay 4P socket terminal No. 2 and No. 1 ignition coil 3P connector terminal No. 3.
5. 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.