Installer motor position sensor — check

The setting motor position sensor is a variable resistance (potentiometer) and transmits to the control unit information about the position of the idle speed controller. This signal is needed when adjusting the idle speed. Deterioration of engine performance when additional units are turned on may be caused by a defect in this sensor.



Check supply voltage. Connect a voltmeter in series to pins 2 and 6 of the harness connector and to ground. Turn on the ignition. Required value: 4.8 5.2 V. Turn off the ignition.

• Check the quality of the stock. To do this, switch off the ignition and connect an ohmmeter to pin 3 and to ground. Required value: 0 ohm.

• Ring the wiring between pin 3 (in cars produced before April 1989 - contact 2) position sensor wiring harness connector and terminal 17 of the control unit connector or ground.

• Connect an ohmmeter between pin 2 (in cars produced before April 1989 - contact 1) sensor connector. Required value: 4-6 kOhm.

Connector pinout differences:

• engine 1.5 l, release from 9.88 to 4.89: power-contact 2 or 3; ground - pin 1.