B197B–POWER LIFTGATE OPEN DIRECTION – PAWL SWITCH PERFORMANCE

For a complete wiring diagram Refer to Section 8W

When Monitored:
Whenever the power liftgate is performing an open operation.
Set Condition:
The pawl switch was not detected as returning to ground after a latch release operation.

Possible Causes

BINDING LIFTGATE

(Q901) LOGIC GROUND CIRCUIT OPEN

(Q60) LIFTGATE PAWL SWITCH SENSE WIRE OPEN

(Q60) LIFTGATE PAWL SWITCH SENSE WIRE SHORT TO VOLTAGE

(Q84) LIFTGATE LATCH CINCH DRIVER CIRCUIT SHORT TO GROUND

(Q84) LIFTGATE LATCH CINCH DRIVER CIRCUIT SHORT TO VOLTAGE

(Q85) LIFTGATE LATCH RELEASE CIRCUIT SHORT TO VOLTAGE

(Q85) LIFTGATE LATCH RELEASE DRIVER CIRCUIT SHORT TO GROUND

POWER LIFTGATE LATCH

Diagnostic Test

1.DTC PRESENT

Does the scan tool display B197B–POWER LIFTGATE OPEN DIRECTION - PAWL SWITCH PERFORMANCE?

Yes

Go To2

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. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).

2.BINDING 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. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).

Go To3

3.(Q85) LIFTGATE LATCH RELEASE DRIVER CIRCUIT SHORT TO GROUND

Is the resistance below 1000.0 ohms?

No

Go To4

Yes

Repair the (Q85) Liftgate Latch Release Driver circuit for a short to ground.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).

4.CHECK THE (Q84) LIFTGATE LATCH CINCH DRIVER CIRCUIT AND THE (Q85) LIFTGATE LATCH RELEASE DRIVER CIRCUIT FOR A SHORT TO VOLTAGE

Is there any voltage present?

Yes

Repair the (Q84) Liftgate Latch Cinch Driver circuit or the (Q85) Liftgate Latch Release Driver circuit for a short to voltage.

Go To 5

5.(Q84) LIFTGATE LATCH CINCH DRIVER CIRCUIT SHORT TO GROUND

Is the resistance below 1000.0 ohms?

No

Go To6

Yes

Repair the (Q84) Liftgate Latch Cinch Driver circuit for a short to ground.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).

6.CHECK THE (Q60) LIFTGATE PAWL SWITCH SENSE FOR A SHORT TO VOLTAGE

Is there any voltage present?

No

Go To 7

Yes

Repair the (Q60) Liftgate Pawl Switch Sense circuit for a short to .
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).

7.CHECK THE (Q901) LOGIC GROUND WIRE FOR AN OPEN

Is the resistance below 2.0 ohms?

Yes

Go To8

Repair the (Q901) Logic Ground circuit for an open.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).

8.CHECK THE (Q60) LIFTGATE PAWL SWITCH SENSE CIRCUIT FOR AN OPEN

Is the resistance below 2.0 ohms?

Yes

Go To9

Repair the (Q60) Liftgate Pawl Switch Sense circuit for an open.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).

9.POWER LIFTGATE MODULE

Did the scan tool show the switch state changing correctly every time?

Yes

Replace the Power Liftgate Latch in accordance with the service information.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).

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 in accordance with the service information.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).