P1540 JEEP Vehicle Speed Sensor Malfunction

P1540 JEEP Vehicle Speed Sensor Malfunction

Possible causes
– Faulty Vehicle Speed Sensor
– Vehicle Speed Sensor harness is open or shorted
– Vehicle Speed Sensor circuit poor electrical connection
– Engine Light ON (or Service Engine Soon Warning Light)
P1540 JEEP Description

The Vehicle Speed Sensor 1 (Output Shaft Rotation Sensor) is mounted to the extension case (from the outside of the case). the sensor outputs a pulse signal which is transmitted to the Transmission Control Module (TCM) where it is converted to vehicle speed.

The transfer clutch drum is connected directly to the rear wheel driving propeller shaft. Vehicle speed sensor 1 on the AWD model detects rear-wheel speed.

JEEP Vehicle:JEEP Commander,JEEP Compass,JEEP Grand Cherokee,JEEP Liberty,JEEP Patriot,JEEP Wrangler,JEEP Wrangler Unlimited,

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