Grand Caravan V6-4.0L (2008)
Power Trunk / Liftgate Hazard Sensor: Testing and Inspection
PINCH SENSOR
WARNING: Use extreme caution when testing pinch sensor operation.
To verify power liftgate system and pinch sensor operation.
1. Cycle the power liftgate through two complete open and close cycles, during each of the final close cycles, with the liftgate in mid-travel ,
depress each of the pinch sensors to verify the power liftgate control module detects an obstruction and returns to the open position. If OK, pinch
sensors and module are OK at this time. If NOT OK, go to STEP 2
2. Remove the liftgate trim panel to access the inoperable pinch sensor's electrical connector. Using an ohmmeter, check for continuity on the two
wires leading from the pinch sensor. While depressing the pinch sensor, continuity should be 300 ohms max. While NOT depressing the pinch
sensor, continuity should be 10,000 ohms min. If OK, pinch sensor is OK at this time. If NOT OK, replace the pinch sensor.
THERMISTOR
The thermistor portion of the right pinch sensor provides the temperature signal to the power liftgate control module (temperature is provided when the
pinch sensor is in an unpinched condition; when pinched, temperature is unavailable because the thermistor is shorted). Refer to the RIGHT PINCH
SENSOR/THERMISTOR DIAGNOSTIC TABLE to test the thermistor resistance.
