• | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
• | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
• | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
---|---|---|---|---|
Liftgate Relay Switch B+ | 2 | 2 | -- | -- |
Liftgate Release Switch Signal | B3265 00 | B3265 00 | B3265 00 | -- |
Liftgate Relay Low Control | -- | 2 | 2 | -- |
Liftgate Relay Coil High Control | B2495 02 | 2 | B2495 01 | -- |
Liftgate Latch Control | 2 | 2 | 2 | -- |
Liftgate Release Switch Ground | -- | 1 | 1 | -- |
Liftgate Latch Ground | -- | 2 | 2 | -- |
1. Liftgate Release Switch Inoperative 2. Liftgate Latch Inoperative |
Pressing the liftgate switch closes a contact providing a ground for the rear closure handle switch open signal circuit. The body control module (BCM) will detect the voltage drop and command voltage to be supplied to the liftgate latch relay supply voltage circuit, thus energizing the liftgate relay which provides voltage to the liftgate latch releasing the liftgate.
Battery voltage must be between 9-16 volts.
The liftgate release switch signal circuit is active for longer than 10 minutes.
The liftgate release switch will be inoperative.
• | The DTC will be current for as long as the fault is present. |
• | When the fault is no longer present, the DTC will be a history DTC. |
• | A history DTC will clear after 50 ignition cycles. |
Rear Hatch/Gate Description and Operation
Control Module References for scan tool information
Ignition ON, observe the scan tool Trunk Release Solenoid Command parameter while pressing and releasing the liftgate release switch. The parameter should change between On and Off.
⇒ | If greater than the specified range, test the ground circuit for an open/high resistance. |
⇒ | If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the BCM. |
⇒ | If not the specified value, test the signal circuit for a short to voltage. If the circuit tests normal, replace the BCM. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
• | Control Module References for BCM replacement, setup, and programming |