B196D
B196D - Power Liftgate Open Direction Full Open Switch Performance
For a complete wiring diagram, refer to.
• When Monitored: During the power liftgate open cycle or liftgate fully closed.
• Set Condition: The full open switch was detected as closed with the liftgate being fully closed or the latch being fully latched. The full open switch was detected as closed before the liftgate was within a few degrees of full open position. The full open switch remained open after approximately reaching 10% of full open position during an open operation. May be triggered by an intermittent full open switch failure.
Theory of Operation
The full open switch indicates when the gate is a few degrees from full open position. The switch is closed when the liftgate is fully open and the switch is open when the liftgate is either fully closed and latched or between full open and closed. It can be checked by manually opening and closing the liftgate while monitoring the scan tool.
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, read Active DTCs.
Does the scan tool display B196D - Power Liftgate Open Direction Full Open Switch Performance?
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 or obstructions.
• Perform the Body Verification Test. Refer to => Non-DTC Based Diagnostics. Body Interior
Test Step 2 - Obstruction Or Sticking Switch
• Examine the liftgate for proper fit and alignment, foreign material in the drive unit or anything that would cause an obstruction to proper operation of the full open switch.
• With the scan tool under PLGM, read the full open switch state.
• Manually operate the liftgate while monitoring the scan tool.
Does the switch status change smoothly as the liftgate is pulled DOWN from the full open position?
Yes
• Go to Test Step 3
No
• Go to Test Step 4
Test Step 3 - Full Open Switch Sense Circuit Intermittent Short to Ground
Never operate the Power Liftgate Drive Unit with the link rod removed as it could damage the Drive Unit.
• Gain access to the power liftgate drive unit harness connector.
• Gain access to the power liftgate module.
• With the scan tool in inputs/outputs, read the full open switch state.
• Ensure the link rod is connected at this time.
• Manually open the liftgate to mid position.
• While monitoring the scan tool, wiggle the wiring harness from the power liftgate module to the full open switch on the power liftgate drive unit assembly.
Did the switch status ever change?
Yes
• Repair the liftgate full open switch sense circuit for an intermittent short to ground.
• Perform the Body Verification Test. Refer to => Non-DTC Based Diagnostics. Body Interior
No
• Replace the power liftgate drive unit.
• Perform the Body Verification Test. Refer to => Non-DTC Based Diagnostics. Body Interior
Test Step 4 - Power Liftgate Drive Unit - Full Open Switch
• Disconnect the power liftgate drive unit harness connector.
• Measure the voltage between the liftgate full open switch sense circuit and sensor ground in the drive unit connector.
• While measuring the voltage, wiggle the harness from the PLG module to the drive unit connector.
Is the voltage constantly above 4.6 volts?
Yes
• Replace the power liftgate drive unit.
• Perform the Body Verification Test. Refer to => Non-DTC Based Diagnostics. Body Interior
No
• Go to Test Step 6
Test Step 5 - Liftgate Full Open Switch Sense Circuit Short to Ground
• Turn the ignition OFF.
• Disconnect the power liftgate module C1 harness connector.
• Measure the resistance between ground and the liftgate full open switch sense circuit in the power liftgate drive unit harness connector.
Is the resistance less than 10k ohms?
Yes
• Repair the liftgate full open switch sense circuit for a short to ground.
• Perform the Body Verification Test. Refer to => Non-DTC Based Diagnostics. Body Interior
No
• Go to Test Step 6
Test Step 6 - Liftgate Full Open Switch Sense Circuit Short to Logic Ground
• Measure the resistance between the liftgate full open switch sense circuit and the logic ground circuit in the power liftgate drive unit harness connector.
Is the resistance less than 10k ohms?
Yes
• Repair the liftgate full open switch sense circuit for a short to the ground.
• Perform the Body Verification Test. Refer to => Non-DTC Based Diagnostics. Body Interior
No
• Go to Test Step 7
Test Step 7 - Liftgate Full Open Switch Sense Circuit Open
• Measure the resistance of the liftgate full open switch sense circuit between the power liftgate C1 connector and the power liftgate drive unit harness connector.
• Wiggle the wiring power liftgate module harness to check for an intermittent open condition.
Is the resistance less than 5.0 ohms?
No
• Repair the liftgate full open switch sense circuit for an open.
• Perform the Body Verification Test. Refer to => Non-DTC Based Diagnostics. Body Interior
Yes
• Replace the power liftgate module.
• Perform the Body Verification Test. Refer to => Non-DTC Based Diagnostics. Body Interior