B1889
B1889-POWER LIFTGATE PINCH SENSOR 1 CIRCUIT HIGHB1889 - Power Lifgate Pinch Sensor 1 Circuit High:
WHEN MONITORED
Whenever the Power Liftgate Module is awake.
SET CONDITION
The power liftgate module has detected the left pinch sensor circuit voltage is above 4.6 volts for over 10 seconds.
POSSIBLE CAUSES
- (Q901) Logic ground open
- (Q75) Left pinch sensor signal wire open
- (Q75) Left pinch sensor signal short to voltage
- Left pinch sensor
- Power liftgate module - pinch sensor open
Diagnostic Test
1. DTC PRESENT
With the scan tool, record DTC's and any liftgate inhibitors.
Erase DTC's.
Turn the ignition off, wait 10 seconds, then turn the ignition on.
Operate the liftgate several times.
With the scan tool, read DTCs.
Q: Does the scan tool display B1889-POWER LIFTGATE PINCH SENSOR 1 CIRCUIT HIGH?
YES: Go To 2
NO: Using the wiring diagram/schematic as a guide, inspect the wiring and connectors for an intermittent condition. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test
2. (Q901) LOGIC GROUND OPEN
Turn the ignition off.
Remove the Liftgate trim panel.
Disconnect the Liftgate Left Pinch Sensor connector.
Measure the resistance between ground and the (Q901) Logic Ground circuit in the Liftgate Left Pinch Sensor connector.
Q: Is the resistance below 5.0 ohms?
YES: Go To 3
NO: Repair the (Q901) Logic Ground circuit for an open. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test
3. (Q75) LEFT PINCH SENSOR SIGNAL CIRCUIT OPEN
Turn the ignition on.
Measure the voltage between the (Q901) Logic Ground circuit and the (Q75 ) Left Pinch Sensor Signal circuit in the Left Pinch Sensor connector.
Q: Is the voltage below 5.3 volts?
YES: Go To 4
NO: Go to 5
4. (Q75) LEFT PINCH SENSOR SIGNAL WIRE OPEN
Turn the ignition off.
Disconnect the Power Liftgate Module C2 connector.
Measure the resistance of the Left Pinch Sensor Signal circuit between the Power Liftgate Module C2 connector and the Left Pinch Sensor connector.
Q: Is the resistance below 5.0 ohms?
YES: Replace the Power Liftgate Module. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test
NO: Repair the (Q75) Left Pinch Sensor Signal wire for an open. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test
5. (Q75) LEFT PINCH SENSOR SIGNAL SHORT TO VOLTAGE
Measure the voltage between the (Q901) Logic Ground circuit and the (Q75 ) Left Pinch Sensor Signal circuit in the Left Pinch Sensor connector.
Q: Is the voltage above 5.2 volts?
NO: Replace the Left Pinch Sensor. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test
YES: Repair the Left Pinch Sensor Signal wire for a short to battery Perform BODY VERIFICATION TEST - VER 1. Body Verification Test