U1101

U1101 - Lost Communication with Rear 1 PTS Display






For a complete wiring diagram, refer to.

• When Monitored: While the vehicle is in reverse for speeds less than 10 mph (16km/h).

• Set Condition: Data display line open.






Test Step 1 - Check For Active DTC

• 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.

Does the scan tool display U1101 - Lost Communication with Rear 1 PTS Display?

Yes

• Go to Test Step 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 chafed, pierced, pinched, and partially broken wires. Also inspect the related connectors for broken, bent, pushed out, spread, corroded, or contaminated terminals.

• Perform the Body Verification Test. Refer to => Non-DTC Based Diagnostics. Body Interior

Test Step 2 - Check the 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 park assist display signal circuit between the park assist module harness connector and the park assist display harness connector.

Is the resistance less than 10.0 ohms?

Yes

• Go to Test Step 3

No

• Repair the park assist display signal circuit for an open.

• Perform the Body Verification Test. Refer to => Non-DTC Based Diagnostics. Body Interior

Test Step 3 - Check the Park Assist Display Supply Circuit for an Open






• Measure the resistance of the park assist display supply circuit between the park assist module harness connector and the park assist display harness connector.

Is the resistance less than 10.0 ohms?

Yes

• Go to Test Step 4

No

• Repair the park assist display supply circuit for an open.

• Perform the Body Verification Test. Refer => Non-DTC Based Diagnostics. Body Interior

Test Step 4 - Check the Park Assist Display Ground Circuit for an Open






• Using a 12 volt test lamp connected to 12 volts check the park assist display ground circuit at the park assist display harness connector.

Does the test lamp illuminate brightly?

Yes

• Go to Test Step 5

No

• Repair the park assist display ground circuit for an open.

• Perform the Body Verification Test. Refer to => Non-DTC Based Diagnostics. Body Interior

Test Step 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, check for DTCs.

Does the scan tool display U1101 - Lost Communication With Rear 1 PTS Display?

Yes

• Replace the park assist module. .

• Perform the Body Verification Test. Refer to => Non-DTC Based Diagnostics. Body Interior

No

• Test Complete.

• Perform the Body Verification Test. Refer to => Non-DTC Based Diagnostics. Body Interior