B188E
B188E-POWER LIFTGATE CONTROL CIRCUIT 1 HIGHB188E - Power Liftgate Control Circuit 1 High:
WHEN MONITORED
Whenever the Power Liftgate is power opening or closing.
SET CONDITION
When the Power Liftgate Module senses voltage more than 9.5 volts on the (Q88) Liftgate Open Driver circuit prior to starting a liftgate power cycle, this code will set.
POSSIBLE CAUSES
- (Q88) Liftgate open driver circuit short to voltage
- (Q89) Liftgate close driver circuit short to voltage
- (Q88) Liftgate open driver circuit short to (Q89) liftgate close driver circuit
- Power liftgate module
Diagnostic Test
1. DTC PRESENT
With the scan tool, record DTC's. Erase DTC's
Turn the ignition off, wait 10 seconds, then turn the ignition on.
If possible, operate the liftgate several times.
With the scan tool, read DTCs.
Q: Does the scan tool display B188E-POWER LIFTGATE CONTROL CIRCUIT 1 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. (Q88) LIFTGATE OPEN DRIVER CIRCUIT SHORT TO VOLTAGE
Disconnect the Power Liftgate Module C1 connector.
Disconnect the Power Liftgate Drive Unit connector.
Measure the voltage between the (Q88) Liftgate Open Driver circuit and ground.
Q: Is there any voltage present?
YES: Repair the (Q88) Liftgate Open Driver circuit for a short to voltage. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test
NO: Go To 3
3. (Q89) LIFTGATE CLOSE DRIVER CIRCUIT SHORT TO VOLTAGE
Measure the voltage between the (Q89) Liftgate Close Driver circuit and ground.
Q: Is there any voltage present?
YES: Repair the (Q89) Liftgate Close Driver circuit for a short to voltage. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test
NO: Go To 4
4. (Q88) LIFTGATE OPEN DRIVER CIRCUIT SHORT TO (Q89) LIFTGATE CLOSE DRIVER CIRCUIT
Turn the ignition off.
Measure the resistance between the (Q88) Liftgate Open Driver circuit and the (Q89) Liftgate Close Driver circuit.
Q: Is the resistance below 10000.0 ohms?
NO: Replace the Power Liftgate Module. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test
YES: Repair the (Q88) Liftgate Open Driver circuit for a short to the (Q89) Liftgate Close Driver circuit. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test