Liftgate Latch Release/Cinch Malfunction - DTC B2495
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Liftgate Latch Release/Cinch Malfunction - DTC B2495
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DTC B2495 01
Liftgate Latch Control Circuit Short to Battery
DTC B2495 02
Liftgate Latch Control Circuit Short to Ground
DTC B2495 04
Liftgate Latch Control Circuit Open
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Diagnostic Fault Information
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Circuit
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Short to Ground
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Open/High Resistance
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Short to Voltage
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Signal Performance
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Latch Control Terminal 1
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B2495 02
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B2495 04
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B2495 01
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-
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Latch Control Terminal 2
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B2495 02
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B2495 04
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B2495 01
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-
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Circuit/System Description
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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 control module 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 liftgate control module prior to activation for a high or low condition and during motor operation for an insufficient current flow condition.
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Conditions for Running the DTC
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The system voltage is 9-16 V.
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Conditions for Setting the DTC
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B2495 01
The liftgate control module detects a short to voltage in the liftgate latch motor cinch control circuit or the liftgate latch motor release control circuit.
B2495 02
The liftgate control module detects a short to ground in the liftgate latch motor cinch control circuit or the liftgate latch motor release control circuit.
B2495 04
The liftgate control module detects an open/high resistance in the liftgate latch motor cinch control circuit or the liftgate latch motor release control circuit.
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Action Taken When the DTC Sets
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The liftgate will be inoperative in the power and manual modes.
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Conditions for Clearing the DTC
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The DTC will be current for as long as the fault is present.
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When the fault is no longer present, the DTC will be a history DTC.
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A history DTC will clear after 50 ignition cycles.
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Whenever the liftgate control module loses power or is disconnected, the ignition must be cycled OFF then ON in order to reactivate the liftgate control module.
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DTC B2495 01 may be set due to minor fluctuations in the system voltage. The power liftgate will continue to function normally and only requires that the DTC be cleared when encountered.
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Schematic Reference
Liftgate Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
Liftgate Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References
for scan tool information
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Circuit/System Verification
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1.
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Ignition OFF, transmission in Park, using either the power door lock switches or the remote keyless entry transmitter, LOCK all doors and then UNLOCK all doors. This will set the liftgate module door lock status to unlock
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2.
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Manually open the liftgate. The A23C liftgate latch assembly should release allowing the liftgate to be pulled open.
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1.
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Ignition OFF, disconnect the X2 harness connector at the K39 liftgate control module.
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2.
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Test for less than 15 Ω between the control circuit terminal 1 and the control circuit terminal 2.
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3.
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If greater than the specified range, test either control circuit for a short to voltage or an open/high resistance. If circuits test normal, test or replace the M31 liftgate latch assembly.
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4.
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Verify that a test lamp does not illuminate between the control circuit terminal 1 and B+.
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5.
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If the test lamp illuminates, test the control circuit for a short to ground. If the circuit tests normal, test or replace the A23C liftgate latch assembly.
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6.
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Verify that a test lamp does not illuminate between the control circuit terminal 2 and B+.
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7.
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If the test lamp illuminates, test the control circuit for a short to ground. If the circuit tests normal, test or replace the A23C liftgate latch assembly.
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8.
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If all circuits test normal, replace the K39 liftgate control module
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Perform the
Diagnostic Repair Verification
after completing the repair.
