U1101

U1101-LOST COMMUNICATION WITH PTS DISPLAY





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:

Data display line open.





Diagnostic Test

1.CHECK FOR ACTIVE DTC: U1101-LOST COMMUNICATION WITH PTS DISPLAY

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: U1101-LOST COMMUNICATION WITH PTS DISPLAY 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 THE (D777) PARK ASSIST DISPLAY SIGNAL CIRCUIT FOR AN OPEN





Turn the ignition off.

Disconnect the Park Assist Module harness connector.

Disconnect the Park Assist Display Module harness connector.

Measure the resistance of the (D777) Park Assist Display Signal circuit between the Park Assist Module harness connector and the Park Assist Display harness connector.

Is the resistance below 5.0 ohms?

Yes

- Go To 3

No

- Repair the (D777) Park Assist Display Signal circuit for an open.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

3.CHECK THE (X777) PARK ASSIST DISPLAY SUPPLY CIRCUIT FOR AN OPEN





Measure the resistance of the (X777) Park Assist Display Supply circuit between the Park Assist Module harness connector and the Park Assist Display harness connector.

Is the resistance below 5.0 ohms?

Yes

- Go To 4

No

- Repair the (X777) Park Assist Display Supply circuit for an open.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

4.CHECK THE (Z171) PARK ASSIST DISPLAY GROUND CIRCUIT FOR AN OPEN





Measure the resistance of the (Z171) Park Assist Display Ground circuit between the Park Assist Module harness connector and the Park Assist Display harness connector.

Is the resistance below 5.0 ohms?

Yes

- Go To 5

No

- Repair the (Z171) Park Assist Display Ground circuit for an open.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

5.CHECK THE OPERATION OF THE PARK ASSIST DISPLAY





Replace the Park Assist Display.

Reconnect the Park Assist Module harness connector.

Turn the ignition on.

With the scan tool, read DTCs.

Does the scan tool display U1101-LOST COMMUNICATION WITH PTS DISPLAY?

Yes

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

No

- Test Complete.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test