B1883–POWER LIFTGATE POSITION SENSOR 1 CIRCUIT PERFORMANCE

For a complete wiring diagram Refer to Section 8W

When Monitored:
Whenever the Power Liftgate Module is power opening or closing.
Set Condition:
When the Power Liftgate Module senses the (Q204) Position Sensor Signal 1 circuit not pulsing during motor operation, this code will set.

Possible Causes

(Q204) POSITION SENSOR SIGNAL 1 CIRCUIT SHORT TO GROUND

(Q204) POSITION SENSOR SIGNAL 1 CIRCUIT OPEN

(Q204) POSITION SENSOR SIGNAL 1 CIRCUIT SHORT TO VOLTAGE

(Q204) POSITION SENSOR SIGNAL 1 CIRCUIT SHORTED TO (Q205) POSITION SENSOR SIGNAL 2 CIRCUIT

(Q901) LOGIC GROUND CIRCUIT OPEN

(Q203) POSITION SENSOR SUPPLY CIRCUIT OPEN

(Q203) POSITION SENSOR SUPPLY CIRCUIT SHORT TO GROUND

(Q203) POSITION SENSOR SUPPLY CIRCUIT SHORT TO VOLTAGE

POWER LIFTGATE DRIVE UNIT

POWER LIFTGATE MODULE

Diagnostic Test

1.CHECK FOR DTCS

Does the scan tool display B1883–POWER LIFTGATE POSITION SENSOR 1 CIRCUIT PERFORMANCE?

Yes

Go To 2

Using the wiring diagram/schematic as a guide, inspect the wiring and connectors for an intermittent condition.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).

2.(Q901) LOGIC GROUND OPEN

Is the resistance below 9.5 ohms?

Yes

Go To 3

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).

3.(Q204) POSITION SENSOR SIGNAL 1 CIRCUIT SHORT TO GROUND

Is the resistance below 10000.0 ohms?

Yes

Repair the (Q204) Position Sensor Signal 1 circuit for a short to ground.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).

Go To 4

4.(Q204) POSITION SENSOR SIGNAL 1 CIRCUIT SHORT TO VOLTAGE

Is there any voltage present?

Yes

Repair the (204) Position Sensor Signal 1 circuit for a short to voltage.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).

Go To 5

5.(Q204) POSITION SENSOR SIGNAL 1 CIRCUIT OPEN

Is the resistance below 5.0 ohms?

No

Repair the (Q204) Position Sensor Signal 1 circuit for an open.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).

Yes

Go To 6

6.(Q203) POSITION SENSOR SUPPLY CIRCUIT OPEN

Is the resistance below 5.0 ohms?

Yes

Go To 7

Repair the (Q203) Position Sensor Supply circuit for an open.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).

7.(Q203) POSITION SENSOR SUPPLY CIRCUIT SHORT TO GROUND

Is the resistance below 10000.0 ohms?

No

Go To 8

Yes

Repair the (Q203) Position Sensor Supply circuit for a short to ground.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).

8.(Q203) POSITION SENSOR SUPPLY CIRCUIT SHORT TO VOLTAGE

Is the voltage above 5.5 volts?

Yes

Repair the (Q203) Position Sensor Supply circuit for a short to voltage. If the power liftgate is inoperative after repairing the (Q203) Position Sensor Supply circuit, 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).

Go to 9

9.(Q204) POSITION SENSOR SIGNAL 1 CIRCUIT SHORTED TO (Q205) POSITION SENSOR SIGNAL 2 CIRCUIT

Is the resistance below 10000.0 ohms?

Yes

Repair the (Q204) Position Sensor Signal 1 circuit for a short to the (Q205) Position Sensor Signal 2 circuit.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).

Go To 10.

10.POWER LIFTGATE MODULE

Is the voltage approximately 5.0 volts for both measurements?

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).

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