B196D–POWER LIFTGATE OPEN DIRECTION – FULL OPEN SWITCH PERFORMANCE

For a complete wiring diagram Refer to Section 8W

When Monitored:
During the Power Liftgate open cycle or liftgate fully closed prior to activation.
Set Condition:
The Power Liftgate Drive Unit Full Open Switch was detected as closed with the liftgate being fully closed or the latch being fully latched.
The Power Liftgate Drive Unit Full Open Switch was detected as closed before 820 pulses of the Power Liftgate Drive Unit position sensor were counted since the start of the open operation.
The Power Liftgate Drive Unit Full Open Switch remained open after approximately 860 pulses of the Power Liftgate Drive Unit position sensor were counted since the start of the open operation.
May be triggered by an intermittent full open switch failure.

Possible Causes

LATCH HAS BEEN MANUALLY LATCHED WITH THE GATE IN THE FULL OPEN POSITION

(Q51) LIFTGATE FULL OPEN SWITCH SENSE CIRCUIT OPEN

(Q51) LIFTGATE FULL OPEN SWITCH SENSE CIRCUIT INTERMITTENT SHORT TO GROUND

(Q51) LIFTGATE FULL OPEN SWITCH SENSE CIRCUIT SHORT TO GROUND

(Q901) LOGIC GROUND OPEN

POWER LIFTGATE DRIVE UNIT

POWER LIFTGATE MODULE

1.DTC PRESENT

Does the scan tool display B196D–POWER LIFTGATE OPEN DIRECTION – FULL OPEN SWITCH PERFORMANCE?

Yes

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 BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).

2.OBSTRUCTION OR STICKING SWITCH

Does the switch status change smoothly as the liftgate is pulled down from the full open position?

Yes

3.(Q51) FULL OPEN SWITCH SENSE CIRCUIT INTERMITTENT SHORT TO GROUND

CAUTION: Never operate the Power Liftgate Drive Unit with the link rod removed as it could damage the Drive Unit.

Did the switch status ever change?

Yes

Repair the (Q51) Liftgate Full Open Switch Sense circuit for an intermittent short to ground.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).

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

4.POWER LIFTGATE DRIVE UNIT – FULL OPEN SWITCH

Is the voltage constantly above 4.6 volts?

Yes

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

5.(Q51) LIFTGATE FULL OPEN SWITCH SENSE CIRCUIT SHORT TO GROUND

Is the resistance below 1000.0 ohms?

Yes

Repair the (Q51) Liftgate Full Open Switch Sense circuit for a short to ground.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).

6.(Q51) LIFTGATE FULL OPEN SWITCH SENSE CIRCUIT SHORT TO (Q901) LOGIC GROUND

Is the resistance below 1000.0 ohms?

Yes

Repair the (Q51) Liftgate Full Open Switch Sense circuit for a short to ground.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).

7.(Q901) LOGIC GROUND OPEN

Is the resistance below 9.5 ohms?

Yes

NOTE: The (Q901) Logic Ground circuit is grounded through the Power Liftgate Module and the (Z800) Ground circuit.
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.(Q51) LIFTGATE FULL OPEN SWITCH SENSE CIRCUIT OPEN

Is the resistance below 5.0 ohms?

No

Repair the (Q51) Liftgate Full Open Switch Sense circuit for an open.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).

Yes

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).