B1980
B1980 - Power Liftgate Latch Control 1 Circuit Low
For a complete wiring diagram, refer to.
• When Monitored: Anytime the power liftgate is in a latch cinch or release operation.
• Set Condition: When the liftgate latch motor cinch or release output is pulled low prior to or during a latch cinch or release operation, this code will set.
Test Step 1 - DTC Present
• With the scan tool, record and erase DTCs.
• Turn the ignition OFF, wait 10 seconds, then turn the ignition ON.
• Operate the power liftgate several times if possible.
• With the scan tool, check for DTCs.
• If the B210D - Battery Voltage LOW DTC is present, repair that code before proceeding.
Does the scan tool display B1980 - Power Liftgate Latch Control 1 Circuit Low?
Yes
• Go to Test Step 2
No
• Using the wiring diagram/schematic as a guide, inspect the wiring and connectors for an intermittent condition. Operate the liftgate several times and check for any binding conditions in the latch assembly.
• Perform the Body Verification Test. Refer to => Non-DTC Based Diagnostics . Body Interior
Test Step 2 - Binding Liftgate Latch
• Examine the liftgate for proper alignment, worn or binding hinges, latch alignment or anything that would cause an obstruction to proper operation.
• With an open liftgate, manually close the latch and open it with the handle switch several times.
Were there any mechanical problems found?
Yes
• Refer to service information for the related symptoms.
• Perform the Body Verification Test. Refer to => Non-DTC Based Diagnostics. Body Interior
No
• Go to Test Step 3.
Test Step 3 - Check the Liftgate Latch Cinch Driver Circuit for a Short to the Logic Ground
• Turn the ignition OFF.
• Disconnect the power liftgate latch connector.
• Measure the resistance between the logic ground circuit and the liftgate latch cinch driver circuit in the latch connector.
• Wiggle the harness and check for an intermittent short circuit condition.
Is the resistance less than 10k ohms?
Yes
• Go to Test Step 6
No
• Go to Test Step 4
Test Step 4 - Check the Liftgate Latch Release Driver Circuit for a Short to the Logic Ground
• Measure the resistance between the logic ground circuit and the liftgate latch release driver circuit in the latch connector.
• Wiggle the harness and check for an intermittent short circuit condition.
Is the resistance less than 10k ohms?
Yes
• Go to Test Step 6
No
• Go to Test Step 5
Test Step 5 - Check the Liftgate Latch Cinch Driver Circuit for a Short to the Liftgate Latch Release Driver Circuit
• Disconnect the power liftgate module C2 harness connector.
• Measure the resistance between the liftgate latch cinch driver circuit and the liftgate latch release driver circuit.
Is the resistance less than 10k ohms?
Yes
• Repair the liftgate latch cinch driver circuit for a short to the liftgate latch release driver circuit.
• Perform the Body Verification Test. Refer to => Non-DTC Based Diagnostics. Body Interior
No
• Replace the power liftgate latch assembly.
• Perform the Body Verification Test. Refer to => Non-DTC Based Diagnostics. Body Interior
Test Step 6 - Check the Liftgate Latch Release Driver Circuit for a Short to Ground
• Disconnect the power liftgate module C2 harness connector.
• Measure the resistance between ground and the liftgate latch Release driver circuit.
• Wiggle the harness and check for an intermittent short circuit condition.
Is the resistance less than 10k ohms?
Yes
• Repair the liftgate latch release driver circuit for a short to ground.
• Perform the Body Verification Test. Refer to => Non-DTC Based Diagnostics. Body Interior
No
• Go to Test Step 7
Test Step 7 - Check the Liftgate Latch Cinch Driver Circuit for a Short to Ground
• Measure the resistance between ground and the liftgate latch cinch driver circuit.
• Wiggle the harness and check for an intermittent short circuit condition.
Is the resistance less than 10k ohms?
Yes
• Repair the liftgate latch cinch driver circuit for a short to ground.
• Perform the Body Verification Test. Refer to => Non-DTC Based Diagnostics. Body Interior
No
• Replace the power liftgate module.
• Perform the Body Verification Test. Refer to => Non-DTC Based Diagnostics. Body Interior