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C1450-FRONT DIFFERENTIAL POSITION SENSOR CIRCUIT HIGH (CONTINUED) 3. FRONT DIFFERENTIAL POSITION SENSOR OPERATION Turn the ignition off. Connect the FDCM harness connector. Ignition on, engine not running. Using a jumper wire, jumper across from the (T522) Front Locker Sensor Sense circuit and the (T521) Locker Sen- While monitoring the sensor state on the DRBIII T , tap the jumper wire on and off the (T522) Front Locker Sensor Sense circuit terminal. Hold the jumper wire on and off the terminal for a minimum of 3 seconds. Does the state change on the DRBIII T while tapping the terminal? Yes >> Replace the Front Locker Solenoid. Perform FDCM VERIFICATION TEST. No >> Go To 4 4. (T522) FRONT LOCKER SENSOR SENSE CIRCUIT OPEN Turn the ignition off. Disconnect the FDCM harness connector. Measure the resistance of the (T522) Front Locker Sensor Sense cir- Is the resistance below 5.0 ohms? Yes >> Go To 5 No >> Repair the open in the (T522) Front Locker Sensor Sense circuit. Perform FDCM VERIFICATION TEST. 3 - 48 DIFFERENTIAL & DRIVELINE - ELECTRICAL DIAGNOSTICS DR/DH |