B1966
B1966-POWER LIFTGATE SENSOR SUPPLY HIGHB1966 - Power Liftgate Sensor Supply High:
WHEN MONITORED
Whenever the Power Liftgate Module is awake.
SET CONDITION
The power liftgate module has detected the position sensor supply voltage is above 5.5 volts for over 10 seconds.
POSSIBLE CAUSES
- (Q901) Logic ground open
- (Q203) Position sensor supply circuit open
- (Q203) Position sensor supply circuit short to battery
- Power liftgate drive unit
- Power liftgate module
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 B1966-POWER LIFTGATE SENSOR SUPPLY 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.
Disconnect the Power Liftgate Drive Unit connector.
Measure the resistance between the (Z918) Ground and the (Q901) Logic Ground circuit in the Power Liftgate Drive Unit connector.
Q: Is the resistance below 9.5 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. (Q203) POSITION SENSOR SUPPLY CIRCUIT SHORT TO BATTERY
Turn the ignition on.
Measure the voltage between the (Q901) Logic Ground circuit and the (Q203) Position Sensor Supply circuit in the Power Liftgate Drive Unit connector.
Q: Is the voltage above 5.5 volts?
YES: Repair the (Q203) Position Sensor Supply circuit for a short to battery. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test
NO: Go to 4
4. (Q203) POSITION SENSOR SUPPLY CIRCUIT OPEN
Turn the ignition off.
Disconnect the Power Liftgate Module C1 connector.
Measure the resistance of the (Q203) Position Sensor Supply circuit between the Power Liftgate Module C1 connector and the Power Lift-gate Drive Unit 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 (Q203) Position Sensor Supply circuit for an open. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test