B2129

B2129 - PTS Display Supply Circuit Voltage Less Than Threshold






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: Park assist sensor display voltage less than 8.0 volts.






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 B2129 - PTS Display Supply Circuit Voltage Less Than Threshold?

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 Park Assist Display for an Internal Short to Ground

• Turn the ignition OFF.

• Disconnect the park assist display module harness connector.

• Turn the ignition ON.

• With the scan tool, record and erase park assist module DTCs.

• Wait 30 seconds.

• With the scan tool, read park assist module DTCs.

Is this DTC still active?

Yes

• Go to Test Step 3

No

• Replace the park assist display module. .

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

Test Step 3 - Check the Park Assist Display Supply Circuit for a Short Ground






• Using a 12 volt test lamp connected to 12 volts check the park assist display supply circuit.

Does the test lamp illuminate brightly?

Yes

• Repair the park assist display supply circuit for a short to ground.

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

No

• Replace the park assist module. .

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