Uplander FWD V6-3.5L VIN L (2006)
Crankshaft Position Sensor: Testing and Inspection
CRANKSHAFT POSITION SENSOR SYSTEM DIAGNOSIS
CIRCUIT DESCRIPTION
The crankshaft position (CKP) sensor is a 24X sensor. It provides 24 digital ON/OFF signals to the powertrain control module (PCM) per revolution
of the crankshaft. This information is used by the PCM for ignition timing, fuel injector timing, misfire diagnostics, and tachometer display. The PCM
supplies 12 volts to the sensor on the 12-volt reference circuit, and provides a ground on the low reference circuit. The CKP sensor provides signals to
the PCM on the medium resolution engine speed signal circuit.
DIAGNOSTIC AIDS
A faulty CKP sensor, CMP sensor, or a short to ground on either 12-volt reference circuit may cause the CKP signal to be lost, preventing the engine
from running.
TEST DESCRIPTION
