U1002

U1002-PTS DISPLAY COMMUNICATION CIRCUIT LOW





For a complete wiring diagram Refer to Diagrams/Electrical.

- When Monitored:

With the ignition in Run/Start, PRNDL in R, N, or D; vehicle speed less than 40 mph (Late build vehicles will disable the Park Assist System in neutral).

- Set Condition:

Display data line low.





Diagnostic Test

1.CHECK FOR ACTIVE DTC: U1002-PTS DISPLAY COMMUNICATION CIRCUIT LOW

Turn the ignition on.

Apply the vehicle park brake.

Shift the transmission into reverse.

With the scan tool, record and erase Park Assist Module DTCs.

Wait 30 seconds.

With the scan tool, read Park Assist Module DTCs.

Is DTC: U1002-PTS DISPLAY COMMUNICATION CIRCUIT LOW active?

Yes

- Go To 2

No

- The condition that caused this code to set is not present at this time. Check for an intermittent condition by inspecting the related wiring harness for chaffed, pierced, pinched, and partially broken wires. Also inspect the related connectors for broken, bent, pushed out, spread, corroded, or contaminated terminals.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

2.CHECK PARK ASSIST MODULE FOR AN INTERNAL SHORT TO GROUND





Turn the ignition off.

Disconnect the Park Assist Module harness connector.

Measure the resistance between ground and the (D777) Park Assist Display Signal circuit.

Is the resistance below 10K ohms?

Yes

- Go To 3

No

- Replace the Park Assist Module.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

3.CHECK THE (D777) PARK ASSIST DISPLAY SIGNAL CIRCUIT FOR A SHORT TO THE (Z171) PARK ASSIST DISPLAY GROUND CIRCUIT





Disconnect the Park Assist Display harness connector.

Measure the resistance between the (D777) Park Assist Display Signal circuit and the (Z171) Park Assist Display Ground circuit.

Is the resistance below 10K ohms?

Yes

- Repair the (D777) Park Assist Display Signal circuit for a short to the (Z171) Park Assist Display Ground circuit.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

No

- Go To 4

4.CHECK THE (D777) PARK ASSIST DISPLAY SIGNAL CIRCUIT FOR A SHORT TO THE (X750) PARK ASSIST SENSOR GROUND CIRCUIT





Measure the resistance between the (D777) Park Assist Display Signal circuit and the (X750) Park Assist Sensor Ground circuit.

Is the resistance below 10K ohms?

Yes

- Repair the (D777) Park Assist Display Signal circuit for a short to the (X750) Park Assist Sensor Ground circuit.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

No

- Go To 5

5.CHECK THE (D777) PARK ASSIST DISPLAY SIGNAL CIRCUIT FOR A SHORT TO THE (Z914) PARK ASSIST MODULE GROUND CIRCUIT





Measure the resistance between the (D777) Park Assist Display Signal circuit and the (Z914) Park Assist Module Ground circuit.

Is the resistance below 10K ohms?

Yes

- Repair the (D777) Park Assist Display Signal circuit for a short to the(Z914) Park Assist Module Ground circuit.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

No

- Go To 6

6.CHECK THE (D777) PARK ASSIST DISPLAY SIGNAL CIRCUIT FOR A SHORT TO GROUND





Measure the resistance between ground and the (D777) Park Assist Display Signal circuit.

Is the resistance below 10K ohms?

Yes

- Repair the (D777) Park Assist Display Signal circuit for a short to ground.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

No

- Replace the Park Assist Display.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test