Engine Speed/Reference Sensor

TESTING REFERENCE AND SPEED SENSORS

Disconnect the two electrical connectors. The gray connector is for the reference mark sensor and the white connector is for the speed sensor. Using an ohmmeter, check the resistance between terminal 1 (yellow wire) and terminal 2 (black wire) on the sensor side end of each connector. If the resistance is not approximately 960 ± 96 ohms, the sensor is faulty and should be replaced.

When replacing a sensor, be sure the connectors are not interchanged, and that the sensor is placed in the correct position in the bellhousing. The bellhousing is marked with a B for the reference sensor, and a D for the speed sensor. Tighten the sensor mounting screw to 7 ± 1 Nm (62 ± 9 in.lb.). Be careful not to overtighten the mounting screw.

If no faults are found with the reference sensor, inspect the raised pin on the flywheel. Using a socket wrench on the front of the crankshaft vibration damper (pulley), hand-turn the engine until the pin is visible through the bellhousing timing check hole. If the pin is missing or damaged, it should be replaced.