Friday, August 2, 2019

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 274

Circuit/System Description

The object alarm 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 V to the object alarm sensors via the 8 V 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 echo received through the

signal circuit to calculate the distance and position of an object.

Conditions for Running the DTC

* DTC B1325 is not set

* Ignition voltage is between 9-16 V

* Transmission in REVERSE

Conditions for Setting the DTC

B0958 01, B0959 01, B0960 01, or B0961 01

Voltage seen on the object alarm sensor signal circuit is greater than 11.5 V or the object alarm sensor is not grounded.

B0958 06, B0959 06, B0960 06, or B0961 06

Voltage seen on the object alarm sensor signal circuit is less than 0.5 V.

B0958 08, B0959 08, B0960 08, or B0961 08

An invalid signal is received by the object alarm module.

B0958 21, B0959 21, B0960 21, or B0961 21

The object alarm sensor determines no change in the position of an object while the vehicle is in motion.

B0958 3A, B0959 3A, B0960 3A, B0961 3A

The object alarm module determines there is an incorrect sensor installed.

Action Taken When the DTC Sets

* The parking assist system is disabled.

* 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).

Conditions for Clearing the DTC

* The DTC will transition to history when the fault is no longer present.

* A history DTC will clear after 100 malfunction-free ignition cycles.

Diagnostic Aids

Make sure the object alarm sensors located on the vehicle rear bumper are clear. Remove any snow, mud or ice that is blocking the sensors.

Reference Information

Schematic Reference

Object Detection Schematics (See: Accessories and Optional Equipment/Collision Avoidance and Parking Assist Systems/Diagrams/Electrical

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