DTC B0954, B0955, B0956, or B0957
| DTC B0954, B0955, B0956, or B0957 |
| Diagnostic Instructions |
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Perform the
Diagnostic System Check - Vehicle
prior to using this diagnostic procedure.
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Review
Strategy Based Diagnosis
for an overview of the diagnostic approach.
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Diagnostic Procedure Instructions
provides an overview of each diagnostic category.
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| DTC Descriptors |
DTC B0954 01
Parking Aid Front Sensor Left Corner Circuit Short to Battery
DTC B0954 06
Parking Aid Front Sensor Left Corner Circuit Low Voltage/Open
DTC B0954 08
Parking Aid Front Sensor Left Corner Circuit Performance - Signal Invalid
DTC B0954 21
Parking Aid Front Sensor Left Corner Circuit Incorrect Period
DTC B0954 3A
Parking Aid Front Sensor Left Corner Circuit Incorrect Component Installed
DTC B0955 01
Parking Aid Front Sensor Left Middle Circuit Short to Battery
DTC B0955 06
Parking Aid Front Sensor Left Middle Circuit Low Voltage/Open
DTC B0955 08
Parking Aid Front Sensor Left Middle Circuit Performance - Signal Invalid
DTC B0955 21
Parking Aid Front Sensor Left Middle Circuit Incorrect Period
DTC B0955 3A
Parking Aid Front Sensor Left Middle Circuit Incorrect Component Installed
DTC B0956 01
Parking Aid Front Sensor Right Middle Circuit Short to Battery
DTC B0956 06
Parking Aid Front Sensor Right Middle Circuit Low Voltage/Open
DTC B0956 08
Parking Aid Front Sensor Right Middle Circuit Performance - Signal Invalid
DTC B0956 21
Parking Aid Front Sensor Right Middle Circuit Incorrect Period
DTC B0956 3A
Parking Aid Front Sensor Right Middle Circuit Incorrect Component Installed
DTC B0957 01
Parking Aid Front Sensor Right Corner Circuit Short to Battery
DTC B0957 06
Parking Aid Front Sensor Right Corner Circuit Low Voltage/Open
DTC B0957 08
Parking Aid Front Sensor Right Corner Circuit Performance - Signal Invalid
DTC B0957 21
Parking Aid Front Sensor Right Corner Circuit Incorrect Period
DTC B0957 3A
Parking Aid Front Sensor Right Corner Circuit Incorrect Component Installed
| Diagnostic Fault Information |
| Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
| 8V Reference | B1405 02 | B0954 06, B0955 06, B0956 06, B0957 06, B0958 06, B0959 06, B0960 06, B0961 06, B1405 03 | B0954 06, B0955 06, B0956 06, B0957 06, B0958 06, B0959 06, B0960 06, B0961 06, B1405 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, B0958 06, B0959 06, B0960 06, B0961 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 parking assist control module supplies 8 V to the object sensors via the 8 V reference circuit and provides ground via the low reference circuit. The parking assist control module triggers the sensors in a sequential loop. After each sensor transmits, the parking assist control module uses the sensor echo received through the signal circuit to calculate the distance and position of an object.
| Conditions for Running the DTC |
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Ignition ON
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The park assist is activated. The activation takes place through putting in the reverse gear or through operating the park assist switch.
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| Conditions for Setting the DTC |
B0954 01, B0955 01, B0956 01, or B0957 01
The parking assist control module has detected the voltage at the sensor circuit is greater than 11.5 V or the object sensor is not grounded.B0954 06, B0955 06, B0956 06, or B0957 06
The parking assist control module has detected the voltage at the sensor circuit is less than 0.5 V.B0954 08, B0955 08, B0956 08, or B0957 08
The parking assist control module has received an invalid signal.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.B0954 3A, B0955 3A, B0956 3A, or B0957 3A
The parking assist control module determines the wrong sensor type is installed.| Action Taken When the DTC Sets |
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The parking assist is disabled.
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The driver information center displays SERVICE PARK ASSIST.
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| Conditions for Clearing the DTC |
The condition for setting the DTC is no longer present.
| Reference Information |
Schematic Reference
Object Detection Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
Object Detection Description and Operation (UVC) Object Detection Description and Operation (UD5)
Electrical Information Reference
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Circuit Testing
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Connector Repairs
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Testing for Intermittent Conditions and Poor Connections
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Wiring Repairs
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Scan Tool Reference
Control Module References for scan tool information
| Circuit/System Verification |
| 1. |
Verify that DTC B1405 is not present.
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| 2. |
If DTC is present, refer to
DTC B1405
.
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| 3. |
Verify that DTC B0954 01, B0955 01, B0956 01 or B0957 01 is not present.
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| 4. |
If DTC is present, check the appropriate sensor for contamination with mud, ice or snow. If no contamination is diagnosed, refer to Circuit/System Testing.
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| 5. |
Verify that DTC B0954 21, B0955 21, B0956 21 or B0957 21 is not present.
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| 6. |
If DTC is present, check the respective sensor for contamination by mud, ice or snow. If no contamination is diagnosed, replace the sensor.
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| 7. |
Verify that DTC B0954 3A, B0955 3A, B0956 3A or B0957 3A is not present.
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| 8. |
If DTC is present, replace the respective sensor with a sensor of correct sensor type.
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| 9. |
Ignition ON, transmission in REVERSE, verify the scan tool Parking Assist System Status parameter displays Enabled.
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| Circuit/System Testing |
| 1. |
Ignition OFF for 30 s, disconnect the harness connector at the appropriate front object sensor.
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| 2. |
Test for less than 5 Ω between the low reference circuit terminal 2 and ground.
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| 3. |
If greater than the specified value, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the K41 Parking Assist Control Module.
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| 4. |
Ignition ON, activate the park assist, test for 7.5-9.0 V between the 8 V reference circuit terminal 1 and ground.
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| 5. |
If less than the specified range, test the 8 V reference circuit for an open/high resistance. If the circuit tests normal, replace the K41 Parking Assist Control Module.
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| 6. |
Ignition OFF, remove the malfunctioning object sensor and swap locations with another properly functioning front object sensor. Connect the harness connector at both sensors.
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| 7. |
Ignition ON, verify the DTC is set for the new location in which the malfunctioning sensor is installed.
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| 8. |
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 K41 Parking Assist Control Module.
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| 9. |
If the DTC sets for the new location in which the malfunctioning sensor is installed, replace the appropriate front object sensor.
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| Repair Instructions |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
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Front Parking Assist Alarm Sensor Replacement
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Control Module References
for parking assist control module replacement, setup and programming
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