• | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
• | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
• | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
---|---|---|---|---|
8-Volt Reference | B0958 06, B0959 06, B0960 06, B0961 06, B1E3A 07 | B0958 06, B0959 06, B0960 06, B0961 06 | B1E3A 07 | -- |
Left Rear Object Sensor Signal | B0958 06 | B0958 06 | B0958 01 | B0958 08, B0958 21 |
Left Middle Rear Object Sensor Signal | B0959 06 | B0959 06 | B0959 01 | B0959 08, B0959 21 |
Right Middle Rear Object Sensor Signal | B0960 06 | B0960 06 | B0960 01 | B0960 08, B0960 21 |
Right Rear Object Sensor Signal | B0961 06 | B0961 06 | B0961 01 | B0960 08, B0960 21 |
Low Reference | -- | B0958 06, B0959 06, B0960 06, B0961 06 | -- | -- |
The object sensors are 3-wire sensors that are used to determine the distance between the vehicle and an object of interest. The object alarm module supplies 8 volts to the object sensors via the 8 volt reference circuit and provides ground via the low reference circuit. The object alarm module triggers the sensors in a sequential loop. After each sensor transmits, the object alarm module uses the sensor ring received though the signal circuit to calculate the distance and position of an object.
• | DTC B1325 is not set |
• | Ignition voltage is between 9-16 volts |
• | The vehicle is in REVERSE |
The object alarm module has detected the 8-volt reference circuit is less than 7.2 volts.
The object alarm module has detected the 8-volt reference circuit is greater than 9.2 volts.
• | Parking assist is disabled. |
• | The object alarm module commands the red indicator ON. |
• | The object alarm module sends a serial data message to the instrument panel cluster (IPC) to display SERVICE PARK ASSIST message in the driver information center (DIC) and a chime will sound. |
• | The DTC will transition to history when the fault is no longer present. |
• | A history DTC will clear after 100 malfunction-free ignition cycles. |
Object Detection Description and Operation
Control Module References for scan tool information
Ignition ON, transmission in REVERSE, verify that the scan tool Sensor Voltage Feed Output parameter is 7.2-9.2 volts.
⇒ | If the DTC is set, test the 8-volt reference circuit terminal 1 for a short to voltage, short to ground, or an open/high resistance. If circuit tests normal, replace the object alarm module. |
⇒ | If the DTC is set, replace the object sensor that was connected immediately before the DTC set. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
• | Control Module References for object alarm module replacement, setup, and programming. |