B1231

B1231-PTS SENSOR 8 CIRCUIT LOW





For a complete wiring diagram refer to Diagrams/Electrical.

- When Monitored:

While the vehicle is in reverse at speeds less than 16 km/h (10 mph).

- Set Condition:

Sensor ring down time is too short (700 secs).





Diagnostic Test

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 this DTC as 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 chafed, 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 SENSOR NO. 8 FOR A SHORT TO GROUND





Shift the transmission into park.

With the scan tool, erase DTCs.

Turn the ignition off.

Disconnect Park Assist Sensor No. 8.

Turn the ignition on.

Shift the transmission into reverse.

With the scan tool, read Park Assist Module DTCs.

Does the scan tool display this DTC as active?

Yes

- Go To 3

No

- Replace Park Assist Sensor No. 8.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

3. CHECK THE (D701) PARK ASSIST SENSOR NO. 8 SIGNAL CIRCUIT FOR A SHORT TO (X750) PARK ASSIST SENSOR GROUND CIRCUIT





Turn the ignition off.

Disconnect the Park Assist Module harness connector.

Measure the resistance between the (D701) Park Assist Sensor No. 8 Signal circuit and the (X750) Park Assist Sensor Ground circuit.

Is the resistance below 10K ohms?

Yes

- Repair the (D701) Park Assist Sensor No. 8 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 4

4. CHECK THE (D701) PARK ASSIST SENSOR NO. 8 SIGNAL CIRCUIT FOR A SHORT TO (X779) PARK ASSIST DISPLAY GROUND CIRCUIT





Measure the resistance between the (D701) Park Assist Sensor No. 8 Signal circuit and the (X779) Park Assist Display Ground circuit.

Is the resistance below 10K ohms?

Yes

- Repair the (D701) Park Assist Sensor No. 8 Signal circuit for a short to the (X779) Park Assist Display Ground circuit.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

No

- Go To 5

5. CHECK THE (D701) PARK ASSIST SENSOR NO. 8 SIGNAL CIRCUIT FOR A SHORT TO (Z920) PARK ASSIST MODULE GROUND CIRCUIT





Measure the resistance between the (D701) Park Assist Sensor No. 8 Signal circuit and the (Z920) Park Assist Module Ground circuit.

Is the resistance below 10K ohms?

Yes

- Repair the (D701) Park Assist Sensor No. 8 Signal circuit for a short to the (Z920) Park Assist Module Ground circuit.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

No

- Go To 6

6. CHECK THE (D701) PARK ASSIST SENSOR NO. 8 SIGNAL CIRCUIT FOR A SHORT TO GROUND





Measure the resistance between ground and the (D701) Park Assist Sensor No. 8 Signal circuit.

Is the resistance below 10K ohms?

Yes

- Repair the (D701) Park Assist Sensor No. 8 Signal circuit for a short to ground.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

No

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