Idle Issues 2005 Nissan Pathfinder Diesel St-l

04-06 Titans/Pathfinders have an electronic module component that has been prone to early failure:
IPDM-ER is the (Intelligent Power Distribution Module in the Engine Room).

Failure Symptoms: Truck can be stuck in "limp mode", erratic flashing lights such as SLIP, 4WD, ABS, Check engine etc., and most importantly the engine dies and can only be restarted after some time!...
New reports are also showing Titans that won't start up from cold due to a failed IPDM-ER.

Don't look for warning lights or codes to assist you for the diagnosis of a failed IPDM-ER board however there is a "Auto Active Test" feature you can perform easily:
1- Turn the ignition switch on
2- Press the door light activator switch in 10 times........notice the open door light on the dash will flash each time you press the switch.
3- Turn the ignition switch Off then back ON.
4- The horn will beep, oil light will flash, the defroster will cycle, headlights will flash, cooling fan will cycle, wipers will come on and ac compressor will cycle if the IDPM-ER is functioning "NORMAL".

Removal of the IPDM-ER (Intelligent Power Distribution Module in the Engine Room) circuit fuse/relay board.

The job will take about 30 minutes....I know because I did a "test-run".
Seven plugs on the circuit board must carefully be unlocked with a small flat screwdriver and removed, then the board can be removed for switching the relays or total board replacement.
NOTE-1: This isn't a job I would prefer to do on the side of the road or with a hot engine bay as one must lean over the battery or between the battery and the open hood which is very close quarters...but I could do it if I had to.
NOTE-2: I placed a tarp over the battery and just leaned into the job to stay clean.
1- Remove the battery negative cable first then the positive.
2- Remove the IPDM upper black plastic cover then release the two plastic clips on the IDPM and use a small flat screw driver to push the connector locks inward to release and remove each of the seven plugs.
3- After all the plugs are removed lift the board pull out upside down only.
4- Remove the board and insert the replacement board (or make the temporary relay swap) and reconnect the seven plugs and finally the battery cable(s).
Note: A common pliers tool will assist removal of the relays if a temporary repair is to be used.

Complete Information

http://www.titanspot.com/Titan/topic/9442-ipdm-er-failurereplacement-04-06-titans/

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