B197E
B197E-POWER LIFTGATE LATCH RELEASE- PAWL SWITCH PERFORMANCE
For a complete wiring diagram refer to Diagrams/Electrical
- When Monitored:
Whenever the power liftgate is performing a opening operation.
- Set Condition:
The release operation was not completed due to the non-transition of the pawl switch during the power release operation. The ratchet switch was detected as grounded but the pawl remained open This code is set during the power releasing operation from a fully closed liftgate.
Diagnostic Test
1. DTC PRESENT
NOTE: This DTC will only set during the cinching operation after the four second time out. This may make it difficult to reproduce.
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 B197E-POWER LIFTGATE LATCH RELEASE - PAWL SWITCH PERFORMANCE?
Yes
- Go To 2
No
- Using the wiring diagram/schematic as a guide, inspect the wiring and connectors for an intermittent condition. Operate the door several times and check for any binding or other obstructions.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test
2. BINDING LIFTGATE
Examine the liftgate for proper fit and alignment, loose/hard or torn seals, misaligned latch striker or anything that would cause an obstruction to proper operation.
Manually operate the liftgate of a known good vehicle and notice the effort needed to open and close.
Compare the effort needed on the disabled liftgate.
Especially notice the effort needed to unlatch and close the liftgate.
Does it take more effort to operate the liftgate than it should?
Yes
- Refer to Service information for the related symptom(s).
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test
No
- Go To 3
3. CHECK THE (Q901) LOGIC GROUND CIRCUIT FOR AN OPEN
Turn the ignition off.
Disconnect the Power Liftgate Module C2 harness connector.
Disconnect the Power Liftgate Latch harness connector.
Measure the resistance of the (Q901) Logic Ground circuit between the Power Liftgate Module C2 harness connector and the Power Liftgate Latch harness connector.
Wiggle the harness while observing the ohmmeter.
Is the resistance below 2.0 ohms?
Yes
- Go To 4
No
- Repair the (Q901) Logic Ground circuit for an open.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test
4. CHECK THE (Q60) LIFTGATE PAWL SWITCH SENSE CIRCUIT FOR AN OPEN
Measure the resistance of the (Q60) Liftgate Pawl Switch Sense circuit between the Power Liftgate Module C2 harness connector and the Power Liftgate Latch harness connector.
Wiggle the harness while observing the ohmmeter.
Is the resistance below 2.0 ohms?
Yes
- Go To5
No
- Repair the (Q60) Liftgate Pawl Switch Sense circuit for an open.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test
5. (Q60) LIFTGATE PAWL SWITCH SENSE CIRCUIT SHORT TO VOLTAGE
Disconnect the Power Liftgate Latch harness connector.
Turn the ignition on.
Measure the voltage between the (Q901) Logic Ground circuit and the (Q60) Liftgate Pawl Switch Sense circuit.
Wiggle the harness while observing the voltmeter.
Is there any voltage present?
No
- Go To 6
Yes
- Repair the (Q60) Liftgate Pawl Switch Sense circuit for a short to voltage.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test
6. (G78) LIFTGATE AJAR SWITCH SENSE CIRCUIT OPEN
Disconnect the Power Liftgate Module C2 harness connector.
Measure the resistance of the (G78) Liftgate Ajar Switch Sense circuit between the Power Liftgate C2 harness connector and the Power Liftgate Latch harness connector.
Wiggle the harness while observing the ohmmeter.
Is the resistance below 2.0 ohms?
Yes
- Go To 7
No
- Repair the (G78) Liftgate Ajar Switch Sense circuit for an open.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test
7. POWER LIFTGATE MODULE
With the scan tool under PLGM, monitor the PAWL SWITCH STATUS.
Using a screwdriver, click the latch to the first detent while observing the scan tool.
Unlatch the latch by pressing the handle switch and observe the scan tool for a change of state.
Repeat this step several times while moving the liftgate in different positions and wiggling the harness to check for an intermittent open circuit.
Did the scan tool show the switch state changing correctly every time?
Yes
- Replace the Power Liftgate Latch.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test
No
- Check the Power Liftgate Module and Power Liftgate Latch harness and connectors for damage, and repair as necessary. If the Power Liftgate Module and Power Liftgate Latch harness and connectors are OK, replace the Power Liftgate Module.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test