P1122 Function throttle actuator intermittent
P1126 Electronic throttle motor power intermittent

Hi Gents,

I'm pretty sure the IPDM (Engine bay) is faulty, I have no supply voltage to pin 3 on the engine ECU and no power at terminal 28 in the IPDM (BCM). If I ground pin 104 at the ECU I can hear the relay "click" but still have no power at terminal 28 at the IPDM. Fuse 51 is live and good.
The problem that I don't understand is; with a solid live fault at the BCM why don't I have a live fault at the throttle motor? Any Nissan techies out there know? I found pinholes in the wiring where someone has been there before me and had this idea that maybe somewhere they plumbed another feed in, but pin 3 is dead at the ECU so where did they do it?

Hi Mark,

Thanks Dave,

This wiring diagram proves that the problem resides in the IPDM, still don't understand why I've got two good PWM signals at the throttle motor with no power on Terminal 3? But I'm confident that the IPDM needs repair/replacement, BBA said they can probably repair it.

Hmmmm, BBA have told me that they can't in fact test/repair it, bit of a waste of time but such is the nature of diagnostics! Anyone know of anyone who could test/repair this? I would imagine that a new unit will be prohibitively expensive and require coding.

Looks like the owner will have to go for new or second hand. I don't have the equipment to code the new unit or S/H so referred her to Nissan specialist.

Mark

Hi Mark, did you ever find out what the customer had done to fix this fault, as I have one exactly the same.

Thanks, Martin.