DTC P1320 - IGNITION SIGNAL Nissan Maxima A32

1. Check Power Supply Turn ignition off. Disconnect condenser and each ignition coil harness connector. Turn ignition on. Using a voltmeter, measure voltage between each ignition coil harness connector terminal No. 1 (Red wire) and ground. Also, measure voltage between condenser harness connector No. 1 (Red wire) and ground. If battery voltage does not exist, repair fault in Red wire. If battery voltage exists, go to next step.
2. Check Ground Circuit Using an ohmmeter, for continuity between each ignition coil harness connector terminal No. 2 (Black wire) and ground. If continuity exists, go to next step. If continuity does not exist, check for fault in circuit and repair as necessary.
3. Check Output Signal Circuit Turn ignition off. Disconnect ECM harness connector and each ignition coil harness connector. Verify harness continuity between ignition coil connector terminal No. 3 and ECM terminals No. 1, 2, 3, 7, 8 and 9. see scheme 3 If continuity is present, go to next step. If continuity is not present, repair harness or connectors as necessary.
4. Check Ignition Coil With connector removed from ignition coil, measure resistance between terminals No. 1 (Red wire) and 2 (Black wire). If zero ohms exist, replace ignition coil. If other than zero ohms exist, go to next step.
5. Check Condenser With connector removed from condenser, measure resistance between terminals. If less than one megohm exists, replace condenser. If one megohm or more exist, disconnect and inspect harness connectors in circuit. Check ECM connector terminals for corrosion or damage. Repair if necessary and retest system.

Scheme 27

Scheme 28