B2495

DTC B2495

DIAGNOSTIC INSTRUCTIONS
- Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Initial Inspection and Diagnostic Overview
- Review Strategy Based Diagnosis for an overview of the diagnostic approach.
- Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC DESCRIPTOR

DTC B2495 01
Endgate/Liftgate Latch Control Circuit Short to Battery

DTC B2495 02
Endgate/Liftgate Latch Control Circuit Short to Ground

DTC B2495 04
Endgate/Liftgate Latch Control Circuit open circuit




DIAGNOSTIC FAULT INFORMATION

CIRCUIT/SYSTEM DESCRIPTION
The latch motor is a bi-directional motor and cinch or unlatch operation is the result of the direction of the motor rotation. The liftgate module (LGM) controls the latch motor through the control circuits by supplying power and ground in the appropriate polarity. The motor control circuits are monitored by the LGM prior to activation for a high or low condition and during motor operation for an insufficient current flow condition.

CONDITIONS FOR RUNNING THE DTC
Battery voltage must be between 9-16 volts.

CONDITIONS FOR SETTING THE DTC

B2495 01
The LGM detects a short to voltage in the liftgate latch motor open control circuit or the liftgate latch motor close control circuit.

B2495 02
The LGM detects a short to ground in the liftgate latch motor open control circuit or the liftgate latch motor close control circuit.

B2495 04
The LGM detects an open/high resistance in the liftgate latch motor open control circuit or the liftgate latch motor close control circuit.

ACTION TAKEN WHEN THE DTC SETS
- The LGM stores the DTC to memory.
- The liftgate latch will malfunction.

CONDITIONS FOR CLEARING THE DTC
- This DTC will change from current to history when the fault is no longer present.
- A history DTC will clear after 100 consecutive ignition cycles if the condition for the malfunction is no longer present.
- The technician issues a scan tool CLEAR DTCs command.

CIRCUIT/SYSTEM VERIFICATION
Command the liftgate to Open and Close with the scan tool. The liftgate latch assembly should release the liftgate allowing the liftgate to open.

CIRCUIT/SYSTEM TESTING
1. Ignition OFF, disconnect the harness connector at the liftgate latch assembly.
2. Ignition OFF, test for less than 1.0 ohm of resistance between the control circuit terminal 1 and ground.
- If greater than the specified range, test the control circuit for a short to voltage or an open/high resistance. If circuits test normal, replace the LGM.
3. Ignition OFF, test for less than 1.0 ohm of resistance between the control circuit terminal 3 and ground.
- If greater than the specified range, test the control circuit for a short to voltage or an open/high resistance. If circuits test normal, replace the LGM.
4. Connect a test lamp between control circuit terminal 1 and control circuit terminal 3.
5. Command the Liftgate to OPEN and CLOSE with a scan tool. The test lamp should turn ON when commanding the OPEN and CLOSE states.
- If the test lamp remains OFF during either of the commands, test for a short to ground on either control circuit. If the circuits test normal, replace the LGM.
6. If all circuits test normal, test or replace the liftgate latch assembly.

COMPONENT TESTING
1. Install a 20-amp fused jumper wire between the control terminal 1 and 12 volts. Momentarily install a jumper wire between the control terminal 3 and ground. The Liftgate Latch Assembly should perform the CINCH or RELEASE function.
- If the function does not perform as specified, replace the appropriate liftgate latch assembly.
2. Reverse the jumper wires; the liftgate latch assembly should perform the RELEASE or CINCH function.
- If the function does not perform as specified, replace the liftgate latch assembly.

REPAIR INSTRUCTIONS
Perform the Diagnostic Repair Verification after completing the diagnostic procedure. Verification Tests