Diagnostic Instructions

DTC Descriptors

DTC B0954 01: Parking Aid Front Sensor 1 Circuit Short to Battery-Left Corner

DTC B0954 06: Parking Aid Front Sensor 1 Circuit Short to Ground or Open-Left Corner

DTC B0954 08: Parking Aid Front Sensor 1 Circuit Signal Invalid-Left Corner

DTC B0954 21: Parking Aid Front Sensor 1 Circuit Incorrect Period-Left Corner

DTC B0955 01: Parking Aid Front Sensor 2 Circuit Short to Battery-Left Middle

DTC B0955 06: Parking Aid Front Sensor 2 Circuit Short to Ground or Open-Left Middle

DTC B0955 08: Parking Aid Front Sensor 2 Circuit Signal Invalid-Left Middle

DTC B0955 21: Parking Aid Front Sensor 2 Circuit Incorrect Period-Left Middle

DTC B0956 01: Parking Aid Front Sensor 3 Circuit Short to Battery-Right Middle

DTC B0956 06: Parking Aid Front Sensor 3 Circuit Short to Ground or Open-Right Middle

DTC B0956 08: Parking Aid Front Sensor 3 Circuit Signal Invalid-Right Middle

DTC B0956 21: Parking Aid Front Sensor 3 Circuit Incorrect Period-Right Middle

DTC B0957 01: Parking Aid Front Sensor 4 Circuit Short to Battery-Right Corner

DTC B0957 06: Parking Aid Front Sensor 4 Circuit Short to Ground or Open-Right Corner

DTC B0957 08: Parking Aid Front Sensor 4 Circuit Signal Invalid-Right Corner

DTC B0957 21: Parking Aid Front Sensor 4 Circuit Incorrect Period-Right Corner

Diagnostic Fault Information

Circuit	Short to Ground	Open/High Resistance	Short to Voltage	Signal Performance
8-Volt Reference	B0954 06, B0955 06, B0956 06, B0957 0,	B0954 06, B0955 06, B0956 06, B0957 06	B1E3A 07	--
Left Front Object Sensor Signal	B0954 06	B0954 06	B0954 01	B0954 08, B0954 21
Left Middle Front Object Sensor Signal	B0955 06	B0955 06	B0955 01	B0955 08, B0955 21
Right Middle Front Object Sensor Signal	B0956 06	B0956 06	B0956 01	B0956 08, B0956 21
Right Front Object Sensor Signal	B0957 06	B0957 06	B0957 01	B0957 08, B0957 21
Low Reference	--	B0954 06, B0955 06, B0956 06, B0957 06	--	--

Circuit/System Description

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.

Conditions for Running the DTC

Conditions for Setting the DTC

B0954 01, B0955 01, B0956 01, or B0957 01

Voltage seen on the object sensor signal circuit is greater than 11.5 volts.

B0954 06, B0955 06, B0956 06, or B0957 06

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

B0954 08, B0955 08, B0956 08, or B0957 08

An invalid signal is received by the object alarm module.

B0954 21, B0955 21, B0956 21, or B0957 21

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

Action Taken When the DTC Sets

Conditions for Clearing the DTC

Reference Information

Schematic Reference

Object Detection Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Object Detection Description and Operation

Electrical Information Reference

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

1. Verify that DTC B1E3A is not set.

⇒	If B1E3A is set, refer to.

2. Park brake OFF, transmission in DRIVE, individually place a suitable object in front of each sensor. Verify the appropriate scan tool Front Region parameter is between Zone 1 and Zone 4.

Circuit/System Testing

Single Object Sensor DTC Set

1. Ignition OFF, disconnect the harness connector at the appropriate object sensor.
2. Ignition OFF for 30 seconds, test for less than 5 ohms between the low reference circuit terminal 2 and ground.

⇒	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.

3. Ignition ON, transmission in DRIVE, test for 8.0-9.0 volts between the voltage reference circuit terminal 1 and ground.

⇒	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.

4. Ignition OFF, remove the malfunctioning object sensor and swap locations with another properly functioning rear object sensor. Connect the harness connector at both sensors.
5. Ignition ON, verify the DTC is set for the new location in which the malfunctioning sensor is installed.

⇒	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.

6. If the DTC sets for the new location in which the malfunctioning sensor is installed, replace the appropriate rear object sensor.

Multiple Object Sensor DTCs Set

1. Ignition OFF, disconnect the harness connector at each of the object sensors.
2. Ignition OFF for 30 seconds, test for less than 5 ohms between the low reference circuit terminal 2 and ground.

⇒	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.

3. Ignition ON, transmission in DRIVE, test for 8.0-9.0 volts between the voltage reference circuit terminal 1 and ground.

⇒	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.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.