2004 Nissan Armada 5.6 L cranks but won’t start

Posted by mellassi on January 18, 2014 under Imports | Be the First to Comment

We can’t get no communication with the scan tool, engine has no spark and no injector pulse.

1. With the key on check for power to the ignition coils on the White/Blue wire. If there is no power, check the operation of the engine control module main relay which is located in the engine room Intelligent Power Distribution Module (IPDM). This relay also powers up the engine control module.

2. If the coils have power, check for loss of signal from either the camshaft or crankshaft position sensor. Both should output square wave signals during cranking.

I switched the fog light relay with the main relay, engine starts. got new relay,  problem fixed.