Ignition Coil: Testing and Inspection
Ignition Coil TroubleshootingNOTE: Perform an ignition coil test after finishing the fundamental tests for the ignition system and the fuel and emissions system.
1. Remove the ignition coil cover.
2. Disconnect the six ignition coil 3P connectors.
3. Measure the voltage at the No.3 terminal of each ignition coil 3P connector with the ignition switch ON (II).
Is there battery voltage?
YES - Go to step 4.
NO - Repair open in the wire between ignition coil and No.11 (15 A) fuse in the driver's under-dash fuse/relay box.
4. Turn the ignition switch OFF.
5. Check for continuity between the No.2 terminal of each ignition coil 3P connector and body ground.
Is there continuity?
YES - Go to step 6.
NO - Repair open in the wire between ignition coil and body ground.
6. Disconnect the Powertrain Control Module (PCM) 31P connector from the PCM.
7. Check for continuity between the body ground and PCM connector terminals C3, C4, C12, C13, C14, and/or C23 individually.
Is there continuity?
YES - Repair short in the wire between ignition coil and PCM.
NO - Go to step 8.
8. Connect the PCM 31 P connector.
9. Measure the voltage at the No.1 terminal of each ignition coil 3P connector with the ignition switch to start (III).
Is there about 0.5 V?
YES - Replace the ignition coil.
NO - Repair open in the wire between ignition coil and PCM.