PINPOINT TEST G : The Alarm System Activates When Opening The Liftgate With A Correctly Cut Key
- G1 BYPASS THE LIFTGATE ANTI-THEFT INHIBIT SWITCH
- Disconnect: Liftgate Anti-Theft Inhibit Switch.
- Ignition ON.
- Using a scan tool, view BCM PIDs.
- Using a scan tool, monitor the BCM KCS_Lgate/Tr PID.
Does the PID indicate Unlock?
Yes REMOVE the jumper wire. GO to G2. No REMOVE the jumper wire. INSTALL a new liftgate lock cylinder. REFER to Handles, Locks, Latches and Entry Systems - Without Intelligent Access (IA) . - G2 CHECK THE LIFTGATE ANTI-THEFT INHIBIT SWITCH GROUND CIRCUIT FOR AN OPEN
- Using a scan tool, monitor the BCM KCS_Lgate/Tr PIDs.
- Connect a fused jumper wire:
Positive Lead Measurement / Action Negative Lead C4813-1 Ground
Does the PID indicate Unlock?
Yes REMOVE the jumper wire. REPAIR the circuit. No REMOVE the jumper wire. GO to G3. - G3 CHECK THE LIFTGATE ANTI-THEFT INHIBIT SWITCH INPUT CIRCUIT FOR AN OPEN
- Ignition OFF.
- Disconnect: BCM C2280C.
Is the resistance greater than 3 ohms?
Yes GO to G4. No REPAIR the circuit. - G4 CHECK FOR CORRECT BCM OPERATION
- Ignition OFF.
- Disconnect and inspect all BCM connectors.
- Repair:
- corrosion (install new connector or terminals - clean module pins)
- damaged or bent pins - install new terminals/pins
- pushed-out pins - install new pins as necessary
- Reconnect all BCM connectors. Make sure they seat and latch correctly.
- Operate the system and determine if the concern is still present.
Is the concern still present?
Yes CHECK OASIS for any applicable TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no TSBs address this concern, INSTALL a new BCM. REFER to REFER to Multifunction Electronic Modules . No The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.
