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Posted on Jan 02, 2017
SOURCE: Headlight problem
There was a relay between the headlight selector switch and the dip/high beam stepper relay which was not on the circuit diagram.
Its a bit difficult to access and is right under the dash on the far left above the fuse panel (British right hand drive type).
The multi spade connector (5 terminals) had been intermittent and overheating for some time. I cut off the connector and soldered all connections to the relay.
The 240SE is back to its reliable self.
Posted on Sep 08, 2008
The stepper motor is not replaceable on this auto. The ECM and crank sensor controll the idle process for this Nissan. First change your crank position sensor you know the cars computer is ok. This is where i would start. Once this has been accomplished if this did not fix your problem.please return and ask me for me and i will go threw the Idle Air Relearning Process with you. I REPEAT DO NOT DO A RELEARN PROCESS WITH THIS FAULTY CRANK SENSOR ENGINE CAN RACE OUT OF CONTROL DAMAGING YOUR ENGINE AND FRYING YOUR ECM WITH OVER VOLTAGE> Your crank sensor is picking up the wrong signals telling the engine it is rotating at a completely different RPM is what is wrong and that is the reason for the radical RPM and transmission shifts. THe trans is programmed to shift at certain RPMs but it cant change right because the crank sensor it telling it it is at 1100 rpm and its really at 2200 rpm. it is simple computer network failure. Change this and get back to me if you have any other questions
Posted on Apr 09, 2012
SOURCE: Stepper motor
make sure u mark them were the needles go .they come off easy u can use a fork if they r hard to come out/if u dont mark them u will be like me trying to to set them becouse noone is helping me to figure that out.just get tape mark spot were they set with out ingine on.u be ok .its easy fix.
Posted on Jan 25, 2013
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Operation The amount of air taken in during idling is regulated by the opening and closing of the servo valve located in the air passage that bypasses the throttle valve. The servo valve is opened or closed by the activation of the stepper motor (incorporated within the idle air control motor in the forward or reverse direction. Battery positive voltage is supplied, by way of the MFI relay, to the coil of the stepper motor. The engine control module switches ON the power transistors (located within the engine control module) in sequential order, and, when current flows to the stepper motor coil, the stepper motor is activated in the forward or reverse direction.
Removal & Installation
Checking Coil Resistance
Oct 11, 2010 | 2005 Mitsubishi Endeavor
Sep 07, 2008 | 1993 Volvo 240
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