• | 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 | B0954 06, B0955 06, B0956 06, B0957 06, B138A 03 | B0954 06, B0955 06, B0956 06, B0957 06, B138A 03 | B138A 07 | -- |
Left Front Corner Object Sensor Signal | B0954 06 | B0954 06 | B0954 01 | B0954 08, B0954 21 |
Left Front Middle Object Sensor Signal | B0955 06 | B0955 06 | B0955 01 | B0955 08, B0955 21 |
Right Front Middle Object Sensor Signal | B0956 06 | B0956 06 | B0956 01 | B0956 08, B0956 21 |
Right Front Corner Object Sensor Signal | B0957 06 | B0957 06 | B0957 01 | B0957 08, B0957 21 |
Low Reference | -- | B0954 06, B0955 06, B0956 06, B0957 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 an 8 V reference and ground reference to each of the object sensors. The object alarm module triggers the sensors in a sequential loop. After each sensor transmits, the object alarm module uses the sensor ring received through the signal circuit to calculate the distance and position of an object.
• | DTC B1325 is not set |
• | The ignition voltage is at least 9.0 V and no more than 16.0 V |
• | Transmission is in DRIVE or REVERSE |
The front object sensor signal circuit detects a voltage greater than 11.5 V.
The front object sensor signal circuit detects a voltage less than 0.5 V.
The object alarm module detects an invalid signal.
The front object sensor determines no change in the position of an object while the vehicle is in motion.
• | Park assist system is disabled. |
• | SERVICE PARK ASSIST message is displayed on the driver information center and a chime will sound. |
• | The object alarm module clears the history DTC when a current DTC is not detected in 100 ignition cycles. |
• | The condition for the DTC is no longer present. |
Object Detection Description and Operation
Control Module References for scan tool information
⇒ | If DTC is set, refer to DTC B138A. |
⇒ | If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the object alarm module. |
⇒ | If greater than the specified range, test the voltage reference circuit for a short to voltage. If the circuit tests normal, replace the object alarm module. |
⇒ | If less than the specified range, test the voltage reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the object alarm module. |
⇒ | If the DTC does not set for the new location, test the signal circuit terminal 3 for a short to voltage, short to ground, or an open/high resistance. If the circuit tests normal, replace the object alarm module. |
⇒ | If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the object alarm module. |
⇒ | If greater than the specified range, test the voltage reference circuit for a short to voltage. If the circuit tests normal, replace the object alarm module. |
⇒ | If less than the specified range, test the voltage reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the object alarm module. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
• | Control Module References for park assist module replacement, setup, and programming |