Object Detection System: Diagnosis Chevrolet Malibu VIII facelift

Diagnostic Code Index

DIAGNOSTIC CODE INDEX

Diagnostic Instructions

1. Perform the «Diagnostic System Check - Vehicle»(ref-609122-S25539464382014041500000) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(ref-609122-S25032153612014041500000) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(ref-609122-S11603450302014041500000) provides an overview of each diagnostic category.

Diagnostic Fault Information

Conditions for Running the DTC

1. Ignition ON
2. The parking assist is activated. The activation takes place through putting in the reverse gear or through operating the park assist switch.

Conditions for Setting the DTC

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

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

The parking assist control module has detected the voltage at the sensor circuit less than 0.5 V.

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

The parking assist control module has received an invalid signal.

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

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

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

The parking assist control module determines the wrong sensor type is installed.

Action Taken When the DTC Sets

1. The parking assist is disabled.
2. The driver information center displays SERVICE PARK ASSIST.

Conditions for Clearing the DTC

The condition for setting the DTC is no longer present.

Circuit/System Testing

1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the appropriate B87 Rear Object Sensor. It may take up to two minutes for all vehicles systems to power down.
2. Test for less than 10 ohms between the low reference circuit terminal 2 and ground. If 10 ohms or greater Ignition OFF, disconnect the X2 harness connector at the K41R Rear Parking Assist Control Module. Test for less than 2 ohms in the low reference circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms replace the K41R Rear Parking Assist Control Module. If less than 10 ohms
3. Ignition ON.
4. Test for 7.5-9.5 V between the 8 V reference circuit terminal 1 and ground. If less than 7.5 V Ignition OFF, disconnect the harness connector at the K41R Rear Parking Assist Control Module. Test for infinite resistance between the 8 V reference circuit and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance Test for less than 2 ohms in the 8 V reference cicuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, replace the K41R Rear Parking Assist Control Module. If greater than 9.5 V Ignition OFF, disconnect the harness connector at the K41R Rear Parking Assist Control Module, ignition ON. Test for less than 1 V between the 8 V reference circuit and ground. If 1 V or greater, repair the short to voltage on the circuit. If less than 1 V, replace the K41R Rear Parking Assist Control Module. If between 7.5-9.5 V
5. Ignition ON.
6. Test for 4.8-5.2 V between the signal circuit terminal 3 and ground. If less than 4.8 V Ignition OFF, disconnect the harness connector at the K41R Rear Parking Assist Control Module. Test for infinite resistance between the signal circuit and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance Test for less than 2 ohms in the signal circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, replace the K41R Rear Parking Assist Control Module. If greater than 5.2 V Ignition OFF, diconnect the harness connector at the K41R Rear Parking Assist Control Module, ignition ON. Test for less than 1 V between the signal circuit and ground. If 1 V or greater, repair the short to voltage on the circuit. If less than 1 V, replace the K41R Rear Parking Assist Control Module. If between 4.8-5.2 V
7. Test or replace the appropriate B78 Rear Object Sensor.

1. Perform the «Diagnostic System Check - Vehicle»(ref-609122-S25539464382014041500000) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(ref-609122-S25032153612014041500000) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(ref-609122-S11603450302014041500000) provides an overview of each diagnostic category.

1. Ignition ON
2. The parking assist is activated. The activation takes place by putting in the reverse gear or by pressing the parking assist switch.

B0967 02

The parking assist control module has detected a short to ground.

B0968 01

The parking assist control module has detected a short to battery.

B0968 06

The parking assist control module has detected a short to ground or open.

1. The parking assist is disabled.
2. The driver information center displays SERVICE PARK ASSIST.

The condition for setting the DTC is no longer present.

1. Ignition OFF, disconnect the harness connector at the S48A Multifunction Switch - Instrument Panel.
2. Test for less than 10 ohms between the S48A Multifunction Switch - Instrument Panel terminal 2 and ground. If 10 ohms or greater Ignition OFF. Test for less than 2 ohms in the ground circuit end to end. If 2 ohms or greater, repair the open/high resistance in the ground circuit. If less than 2 ohms, repair the open/high resistance in the ground connection. If less than 10 ohms
3. Ignition ON.
4. Verify the scan tool Parking Assist Switch parameter is Inactive. If not Inactive Ignition OFF, disconnect the harness connector at the K41R Rear Parking Assist Control Module. Test for infinite resistance between the signal circuit terminal 5 and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance, replace the K41R Rear Parking Assist Control Module. If Inactive
5. Install a 3 A fused jumper wire between the signal circuit terminal 5 and ground.
6. Verify the scan tool Parking Assist Switch parameter is Active. If not Active Ignition OFF, disconnect the harness connector at the K41R Rear Parking Assist Control Module, ignition ON. Test for less than 1 V between the signal circuit and ground. If 1 V or greater, repair the short to voltage on the circuit. If less than 1 V. Test for less than 2 ohms in the signal circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, replace the K41R Rear Parking Assist Control Module. If Active
7. Test or replace the S48A Multifunction Switch - Instrument Panel.

Parking Assist Switch Indicator Malfunction

1. Ignition OFF, disconnect the harness connector at the S48A Multifunction Switch - Instrument Panel.
2. Test for less than 10 ohms between the S48A Multifunction Switch - Instrument Panel terminal 2 and ground. If 10 ohms or greater Ignition OFF. Test for less than 2 ohms in the ground circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, repair the open/high resistance in the ground connection. If less than 10 ohms
3. Connect a test lamp between the voltage circuit terminal 3 and control circuit terminal 6.
4. Verify the test lamp turns ON and OFF when commanding the Parking Assist Switch LED On and Off with a scan tool. If the test lamp is always OFF Ignition OFF, disconnect the harness connector at the K41R Rear Parking Assist Control Module. Test for infinite resistance between the voltage circuit and ground. If less than infinite resistance, repair the short to ground in the circuit. If infinite resistance Test for less than 2 ohms in the control circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, replace the K41R Rear Parking Assist Control Module. If the test lamp is always ON Ignition OFF, disconnect the harness connector at the K41R Rear Parking Assist Control Module, ignition ON. Test for less than 1 V between the voltage circuit and ground. If 1 V or greater, repair the short to voltage on the circuit. If less than 1 V, replace the K41R Rear Parking Assist Control Module. If the test lamp turns ON and OFF
5. All OK.

1. Perform the «Diagnostic System Check - Vehicle»(ref-609122-S25539464382014041500000) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(ref-609122-S25032153612014041500000) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(ref-609122-S11603450302014041500000) provides an overview of each diagnostic category.

Ignition ON.

B0987 01

The frontview camera module detects a short to voltage in the control circuit.

B0987 06

The frontview camera module detects a short to ground or an open/high resistance in the control circuit.

Lane departure warning is disabled.

The condition for setting the DTC is no longer present.

1. Ignition OFF, and all vehicle systems OFF, disconnect the harness connector at the S48A Multifunction Switch - Instrument Panel, ignition ON. NOTE: Verify interior lighting dimming is turned all the way up.
2. Test for 10 - 13 V between the control circuit terminal 3 and ground. If less than 10 V Ignition OFF, disconnect the harness connector at the K9 Body Control Module. Test for infinite resistance between the control circuit and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance Test for less than 2 ohms in the control circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, refer to «Interior Backlighting Malfunction»(ref-609145-S18199295712014041500000) . If greater than 13 V Ignition OFF, disconnect the harness connector at the K9 Body Control Module, ignition ON. Test for less than 1 V between the control circuit and ground. If 1 V or greater, repair the short to voltage on the circuit. If less than 1 V, refer to «Interior Backlighting Malfunction»(ref-609145-S18199295712014041500000) . If between 10 - 13 V
3. Connect a test lamp between control circuit terminal 8 (with UD7) or terminal 6 (without UD7) and B+.
4. Verify the test lamp turns ON and OFF when commanding the Vehicle Direction Camera Indicator Status parameter On and Off with a scan tool. If the test lamp is always OFF Ignition OFF, disconnect the harness connector at the K109 Frontview Camera Module, ignition ON. Test for less than 1 V between the control circuit and ground. If 1 V or greater, repair the short to voltage on the circuit. If less than 1 V Ignition OFF. Test for less than 2 ohms in the control circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, replace the K109 Frontview Camera Module. If the test lamp is always ON Ignition OFF, disconnect the harness connector at the K109 Frontview Camera Module. Test for infinite resistance between the control circuit and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance, replace the K109 Frontview Camera Module. If the test lamp turns ON and OFF
5. Test or replace the S48A Multifunction Switch - Instrument Panel.

1. Perform the «Diagnostic System Check - Vehicle»(ref-609122-S25539464382014041500000) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(ref-609122-S25032153612014041500000) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(ref-609122-S11603450302014041500000) provides an overview of each diagnostic category.

1. Ignition ON
2. Frontview camera enabled

The frontview camera module detects a malfunction.

1. The frontview camera module is disabled.
2. The frontview camera module disable history buffer stores information why the system was disabled.

The condition for setting the DTC is no longer present.

Diagnostic Aids

The frontview camera module disable history buffers are used to store information about the frontview camera module features that are disabled. The buffers will only update if the disable condition changes.

Example: If the data received from the steering wheel angle sensor is Invalid across many ignition cycles then it will only appear in 1 history buffer and not all history buffers. If this condition is the current reason why the frontview camera module is disabled then it will be set in frontview camera module disable history buffer 1. If a new reason occurs, such as vehicle speed validity is invalid, then the invalid steering wheel angle sensor fault will shift into disable history buffer 2 and vehicle speed validity invalid will be in disable history buffer 1. Since there are only 4 disable history buffers, the invalid steering wheel angle sensor will age out if 4 other disable reasons occur since the last invalid steering wheel angle sensor event occurred. Frontview camera module disable history buffer 1 contains the current reason that one of the frontview camera module features is disabled.

The frontview camera module disable history buffers can display the following values

1. Lane Departure Warning Indicator Malfunction
2. Lane Departure Warning Switch Malfunction
3. Camera Obstructed
4. Accelerator Pedal Position Out of Range
5. Driven Wheel Speed Signal Invalid
6. Non-Driven Wheel Speed Signal Invalid
7. Brake Pedal Moderate Travel Signal Invalid
8. Brake Pedal Initial Travel Position Achieved
9. Lost Communication with Steering Wheel Angle Sensor Module
10. Invalid Data Received From Steering Wheel Angle Sensor Module
11. Forward Collision Alert Switch Malfunction
12. Clutch Pedal Position (CPP) Sensor Performance
13. Clutch Pedal Position (CPP) Sensor Performance
14. Transmission Gear Engaged
15. Acceleration Sensor Longitudinal Signal
16. Invalid Data Received From Yaw Rate Sensor Module
17. Power Mode Controlled by Backup Device
18. System Power Mode
19. Overvoltage
20. Undervoltage
21. Undefined

1. Perform the «Diagnostic System Check - Vehicle»(ref-609122-S25539464382014041500000) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(ref-609122-S25032153612014041500000) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(ref-609122-S11603450302014041500000) provides an overview of each diagnostic category.

Ignition voltage is between 9-16 V.

The stored VIN does not match the received VIN.

1. The parking assist system or the lane departure warning system is disabled.
2. The driver information center displays SERVICE PARK ASSIST or SERVICE LANE DEPARTURE SYSTEM.

The stored VIN matches the VIN stored in the body control module.

1. Perform the «Diagnostic System Check - Vehicle»(ref-609122-S25539464382014041500000) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(ref-609122-S25032153612014041500000) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(ref-609122-S11603450302014041500000) provides an overview of each diagnostic category.

DTC Descriptors

For symptom byte information, refer to Symptom Byte List .

1. Ignition ON
2. Transmission in REVERSE

B1405 02

The parking assist control module has detected the object sensor supply voltage circuit is shorted to ground.

B1405 03

The parking assist control module has detected the object sensor supply voltage circuit is less than 7.2 V.

B1405 07

The parking assist control module has detected the object sensor supply voltage circuit is greater than 9.2 V.

1. The parking assist is disabled.
2. The driver information center displays SERVICE PARK ASSIST.

The condition for setting the DTC is no longer present.

1. Ignition OFF, disconnect the harness connector at each of the B78 Rear Object Sensors. Ignition ON.
2. Test for 7.2-9.2 V between the object sensor reference circuit terminal 1 at all B78 Rear Object Sensor harness connectors and ground. If less than 7.2 V Ignition OFF, disconnect the harness connector at the K41R Rear Parking Assist Control Module. Test for infinite resistance between the 8 V reference circuit and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance Test for less than 2 ohms in the 8 V reference circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, replace the K41R Rear Parking Assist Control Module. If greater than 9.2 V Disconnect the harness connector X 2 at the K41R Rear Parking Assist Control Module, ignition ON. Test for less than 1 V between the 8 V supply voltage circuit and ground. If 1 V or greater, repair the short to voltage in the circuit. If less than 1 V, replace the K41R Rear Parking Assist Control Module. If between 7.2-9.2 V
3. All OK.

1. Perform the «Diagnostic System Check - Vehicle»(ref-609122-S25539464382014041500000) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(ref-609122-S25032153612014041500000) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(ref-609122-S11603450302014041500000) provides an overview of each diagnostic category.

Ignition ON.

DTC B356A 02

The frontview camera module has detected a short to ground for more than 10 s.

DTC B356A 05

The frontview camera module has detected a short to voltage or an open/high resistance for more than 10 s.

1. Lane departure warning is disabled.
2. Service Lane Departure is displayed on the driver information center.

1. The condition responsible for setting the DTC no longer exists.
2. A history DTC will clear once 100 consecutive malfunction-free ignition cycles have occurred.

Manually depressing the lane departure warning switch for an extended length of time will cause this DTC to set.

1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the S48A Multifunction Switch - Instrument Panel. It may take up to 2 minutes for all vehicle systems to power down.
2. Test for less than 10 ohms between the ground circuit terminal 5 and ground. If 10 ohms or greater Test for less than 2 ohms in the ground circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, repair the open/high resistance in the ground connection. If less than 10 ohms
3. Ignition ON.
4. Verify the scan tool Vehicle Direction Warning Switch Status parameter is Off. If not Off Ignition OFF, disconnect the harness connector at the K109 Frontview Camera Module. Test for infinite resistance between the S48A Multifunction Switch - Instrument Panel signal circuit terminal 6 and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance, replace the K109 Frontview Camera Module. If Off
5. Install a 3 A fused jumper wire between the signal circuit terminal 6 and ground circuit terminal 5.
6. Verify within 10 s the scan tool Vehicle Direction Warning Switch Status parameter is On. If not On Ignition OFF, disconnect harness connector at the K109 Frontview Camera Module. Ignition ON. Test for less than 1 V between the signal circuit terminal 6 and ground. If 1 V or greater, repair the short to voltage on the circuit. If less than 1 V. Test for less than 2 ohms in the signal circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, replace the K109 Frontview Camera Module. If On
7. Test or replace the S48A Multifunction Switch - Instrument Panel.

Visual/Physical Inspection

1. Inspect for aftermarket devices which may affect the operation of the system. Refer to «Checking Aftermarket Accessories»(ref-609142-S41089298292014041500000) .
2. Inspect the easily accessible or visible system components for obvious damage or conditions which may cause the symptom.
3. Make sure the parking assist sensors located on the vehicle front and rear bumper are clear. Remove any snow, mud or ice that is blocking the sensors.

Symptom List

1. «Forward Collision Alert System Malfunction»(ref-609181-S18256478922014041500000)
2. «Lane Departure Warning System Malfunction»(ref-609181-S32030442942014041500000)
3. «Parking Assist System Malfunction»(ref-609181-S26802637252014041500000)
4. «Rear Vision Camera System Malfunction»(ref-609181-S04686802852014041500000)

1. Perform the «Diagnostic System Check - Vehicle»(ref-609122-S25539464382014041500000) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(ref-609122-S25032153612014041500000) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(ref-609122-S11603450302014041500000) provides an overview of each diagnostic category.

Certain factors will affect the operation of the forward collision alert system. Forward collision alert is intended to detect vehicles. It is not intended to warn the driver of any objects that are not detected as a vehicle such as pedestrians, animals, signs, guard rails, bridges, construction barrels or other stationary or slow moving objects. In few cases the camera may inadvertently detect a vehicle that is not in the path ahead, or the system may occasionally provide unrealistic alerts. This could occur with a turning vehicle ahead, guard rails, traffic signs, or other stationary objects. This is normal operation, the vehicle does not need service. When the system is operating properly, the green vehicle ahead alert indicator will illuminate on the vehicle direction display when the system detects a vehicle in the path ahead. This indicates that all of the required operating conditions are met. The green vehicle ahead alert indicator will not appear when the system is having difficulty seeing other vehicles on the road. This can occur if the front view camera is blocked with mud, dirt, snow, ice, slush, if the windshield is damaged, or when weather limits visibility, such as while driving in fog, rain, or snow conditions. This is normal operation, the vehicle does not need service.

Additionally, the Front View Camera Disable History can give useful hints about what affected the operation of the forward collision alert system. For the Front View Camera Disable History, refer to DTC B1011 .

Note. Perform the Circuit/System Verification before proceeding with Circuit/System Testing.

Frontview Camera Module Malfunction

1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the K109 Frontview Camera Module. It may take up to 2 minutes for all vehicle systems to power down.
2. Test for less than 10 ohms between the ground circuit terminal 1 and ground. If 10 ohms or greater Ignition OFF. Test for less than 2 ohms in the ground circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, repair the open/high resistance in the ground connection. If less than 10 ohms
3. Verify a test lamp illuminates between the B+ circuit terminal 3 and ground. If the test lamp does not illuminate and the circuit fuse is good Ignition OFF. Test for less than 2 ohms in the B+ circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, verify the fuse is not open and there is voltage at the fuse. If the test lamp does not illuminate and the circuit fuse is open Ignition OFF. Test for infinite resistance between the B+ circuit and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance, replace the K109 Frontview Camera Module. If the test lamp illuminates
4. Replace the K109 Frontview Camera Module.

Forward Collision Alert Indicator Malfunction

1. Ignition OFF, and all vehicle systems OFF, disconnect the harness connector at the P43 Collision Alert Indicators. It may take up to 2 minutes for all vehicle systems to power down.
2. Test for less than 10 ohms between the ground circuit terminal 4 and ground. If 10 ohms or greater Ignition OFF. Test for less than 2 ohms in the ground circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, repair the open/high resistance in the ground connection. If less than 10 ohms
3. Ignition ON.
4. Verify a test lamp illuminates between the ignition circuit terminal 1 and ground. If the test lamp does not illuminate and the circuit fuse is good Ignition OFF. Test for less than 2 ohms in the ignition circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, verify the fuse is not open and there is voltage at the fuse. If the test lamp does not illuminate and the circuit fuse is open Ignition OFF. Test for infinite resistance between the ignition circuit and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance, replace the P43 Collision Alert Indicators. If the test lamp illuminates
5. Connect a test lamp between the control circuit terminal 2 and the ignition circuit terminal 1.
6. Verify the test lamp turns ON and OFF when commanding the Instrument Cluster All Indicators ON and OFF with a scan tool. If the test lamp is always OFF Ignition OFF, disconnect the harness connector at the P16 Instrument Cluster, ignition ON. Test for less than 1 V between the control circuit and ground. If 1 V or greater, repair the short to voltage on the circuit. If less than 1 V Ignition OFF. Test for less than 2 ohms in the control circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, replace the P16 Instrument Cluster. If the test lamp is always ON Ignition OFF, disconnect the harness connector at the P16 Instrument Cluster. Test for infinite resistance between the control circuit and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance, replace the P16 Instrument Cluster. If the test lamp turns ON and OFF
7. Test or replace the P43 Collision Alert Indicators.

Forward Collision Alert Switch Malfunction

1. Ignition OFF, disconnect the harness connector at the S70L Steering Wheel Controls Switch - Left, ignition ON.
2. Verify a test lamp illuminates between the ignition circuit terminal 1 and ground. If test lamp does not illuminate and the circuit fuse is good Ignition OFF. Test for less than 2 ohms in the Ignition circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, verify the fuse is not open and there is voltage at the fuse. If the test lamp does not illuminate and the circuit fuse is open Ignition OFF. Test for infinite resistance between the Ignition circuit and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance, replace the S70L Steering Wheel Controls Switch - Left. If the test lamp illuminates
3. Ignition OFF, connect the harness connector at the S70L Steering Wheel Controls Switch - Left, disconnect the X3 harness connector at the K9 Body Control Module, ignition ON.
4. Test for less than 1 V between the signal circuit terminals listed below and ground: Terminal 4 Terminal 16 If 1 V or greater Repair the short to voltage on the signal circuit. If less than 1 V
5. Ignition OFF.
6. Test for infinite resistance between the signal circuit terminals listed below and ground: Terminal 4 Terminal 16 If less than infinite resistance Repair the short to ground on the signal circuit. If infinite resistance
7. Disconnect the harness connector at the S70L Steering Wheel Controls Switch - Left.
8. Test for less than 5 ohms between the circuit terminals listed below: S70L Steering Wheel Controls Switch - Left terminal 1 and K9 Body Control Module terminal 4. S70L Steering Wheel Controls Switch - Left terminal 2 and K9 Body Control Module terminal 16. If greater than 5 ohms Repair the open/high resistance in the circuit. If less than 5 ohms
9. Test or replace the S70L Steering Wheel Controls Switch - Left.

Component Testing

Forward Collision Alert Switch

Static Test

1. Ignition OFF, disconnect the harness connector at the S70L Steering Wheel Controls Switch - Left.
2. Test for 6.1k-7.5k ohms between the control terminal 1 and the signal circuit terminal 2. If not between 6.1k-7.5k ohms Replace the S70L Steering Wheel Controls Switch - Left. If between 6.1k-7.5k ohms
3. Test for 1.6k-2.1k ohms between the control terminal 1 and the signal circuit terminal 2 while pressing the switch. If not between 1.6k-2.1k ohms Replace the S70L Steering Wheel Controls Switch - Left. If between 1.6k-2.1k ohms
4. All OK.

1. Perform the «Diagnostic System Check - Vehicle»(ref-609122-S25539464382014041500000) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(ref-609122-S25032153612014041500000) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(ref-609122-S11603450302014041500000) provides an overview of each diagnostic category.

The following is a brief description of potential causes which may aid in diagnosis

1. Manual Disable - The parking assist system has been disabled through the parking assist switch or audio system personalization menu.
2. Hitch/Object Attached - The parking assist control module is detecting an object that is attached to the vehicle. Common items such as a hitch receiver, trailer, or a bicycle rack may cause this concern. Additionally, damage to the rear of the vehicle or a misaligned sensor may cause this concern. If the vehicle is damaged in a manner that causes the sensor to detect the bumper itself, the parking assist control module will interpret this as an attached object and disable the system. Carefully inspect the bumper, bumper mounting surface, and sensor retainers before continuing with normal diagnosis. After the detected cause has been addressed the vehicle must be driven at speed greater than 40 km/h (25 MPH).
3. Vehicle Overspeed - The vehicle is travelling too fast in reverse at speeds of greater than 8 km/h (5 MPH).
4. Inhibit - The parking assist control module has lost or received invalid GMLAN signal(s).
5. Sensor Disturbance - An outside interference is causing sensor movement. Such interference may be caused a heavy pounding, like that of a nearby jackhammer, or large changes in pressure, such as a large truck air brakes.
6. Sensor Ring Time - If the sensor fails its own diagnostic initialization the parking assist control module will set this error. After the detected cause has been addressed the vehicle must be driven at speed greater than 40 km/h (25 MPH). The following is a list of reasons this cause may have set: One or more of the sensors may be blocked by snow, mud, ice, or other debris. This might happen after going through a car wash in cold weather. Silicone insulator surrounding sensor maybe missing, cut, or twisted. Improperly installed sensor, sensor maybe be crooked due to a tight wire harness. One or more of the sensors may be scratched or the paint maybe chipped. Excessive paint thickness on a sensor may cause an excessive sensor ring time. When replacing or refinishing a sensor, do not apply an excessive amount of paint or clear coat.

Park Assist Switch Circuit Malfunction

1. Ignition OFF, disconnect the harness connector at the S48A Multifunction Switch - Instrument Panel.
2. Test for less than 10 ohms between the S48A Multifunction Switch - Instrument Panel terminal 2 and ground. If 10 ohms or greater Ignition OFF. Test for less than 2 ohms in the ground circuit end to end. If 2 ohms or greater, repair the open/high resistance in the ground circuit. If less than 2 ohms, repair the open/high resistance in the ground connection. If less than 10 ohms
3. Ignition ON.
4. Verify the scan tool Parking Assist Switch parameter is Inactive. If not Inactive Ignition OFF, disconnect the harness connector at the K41R Rear Parking Assist Control Module. Test for infinite resistance between the signal circuit terminal 5 and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance, replace the K41R Rear Parking Assist Control Module. If Inactive
5. Install a 3 A fused jumper wire between the signal circuit terminal 5 and ground.
6. Verify the scan tool Parking Assist Switch parameter is Active. If not Active Ignition OFF, disconnect the harness connector at the K41R Rear Parking Assist Control Module, ignition ON. Test for less than 1 V between the signal circuit and ground. If 1 V or greater, repair the short to voltage on the circuit. If less than 1 V. Test for less than 2 ohms in the signal circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, replace the K41R Rear Parking Assist Control Module. If Active
7. Test or replace the S48A Multifunction Switch - Instrument Panel.

Parking Assist Switch Indicator Malfunction

1. Ignition OFF, disconnect the harness connector at the S48A Multifunction Switch - Instrument Panel.
2. Test for less than 10 ohms between the S48A Multifunction Switch - Instrument Panel terminal 2 and ground. If 10 ohms or greater Ignition OFF. Test for less than 2 ohms in the ground circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, repair the open/high resistance in the ground connection. If less than 10 ohms
3. Connect a test lamp between the voltage circuit terminal 3 and control circuit terminal 6.
4. Verify the test lamp turns ON and OFF when commanding the Parking Assist Switch LED On and Off with a scan tool. If the test lamp is always OFF Ignition OFF, disconnect the harness connector at the K41R Rear Parking Assist Control Module. Test for infinite resistance between the voltage circuit and ground. If less than infinite resistance, repair the short to ground in the circuit. If infinite resistance Test for less than 2 ohms in the control circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, replace the K41R Rear Parking Assist Control Module. If the test lamp is always ON Ignition OFF, disconnect the harness connector at the K41R Rear Parking Assist Control Module, ignition ON. Test for less than 1 V between the voltage circuit and ground. If 1 V or greater, repair the short to voltage on the circuit. If less than 1 V, replace the K41R Rear Parking Assist Control Module. If the test lamp turns ON and OFF
5. All OK.

1. Perform the «Diagnostic System Check - Vehicle»(ref-609122-S25539464382014041500000) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(ref-609122-S25032153612014041500000) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(ref-609122-S11603450302014041500000) provides an overview of each diagnostic category.

A poor video image can be caused by ice, snow, and mud buildup on the lens of the rearview camera. Also, extreme lighting conditions can affect performance, such as operating in the dark or with bright sunlight shining on the camera. Extreme high or low temperatures can also affect the image quality. An open in the shield of the video signal circuit can also cause a distorted screen.

Note. Circuit/System Verification must be performed before Circuit/System Testing.

1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the B87 Rearview Camera. It may take up to 2 min for all vehicle systems to power down.
2. Test for less than 10 ohms between the ground circuit terminal 5 and ground. If 10 ohms or greater Test for less than 2 ohms in the ground circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, repair the open/high resistance in the ground connection. If less than 10 ohms
3. Ignition ON.
4. Verify a test lamp illuminates between the ignition circuit terminal 6 and ground. If the test lamp does not illuminate and the circuit fuse is good Ignition OFF. Test for less than 2 ohms in the ignition circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, verify the fuse is OK and there is voltage at the fuse. If the test lamp does not illuminate and the circuit fuse is open Ignition OFF. Test for infinite resistance between the ignition circuit and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance, refer to «Power Mode Mismatch»(ref-609142-S10543886372014041500000) . If the test lamp illuminates
5. Engine running, park brake applied, transmission in REVERSE.
6. Verify a test lamp illuminates between the control circuit terminal 3 and ground. If the test lamp does not illuminate Ignition OFF, disconnect the X7 harness connector at the K9 Body Control Module. Test for infinite resistance between the control circuit and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance Test for less than 2 ohms in the control circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, replace the K9 Body Control Module. If the test lamp illuminates
7. Ignition OFF, disconnect the X4 harness connector at the A11 Radio, ignition ON.
8. Test for less than 1 V between the signal circuit terminal listed below and ground: B87 Rearview Camera signal (+) circuit terminal 1. B87 Rearview Camera signal (-) circuit terminal 4. If 1 V or greater Repair the short to voltage on the circuit. If less than 1 V
9. Test for infinite resistance between the signal circuit terminal listed below and ground: B87 Rearview Camera signal (+) circuit terminal 1. B87 Rearview Camera signal (-) circuit terminal 4. If less than infinite resistance Repair the short to ground on the circuit. If infinite resistance
10. Test for less than 2 ohms in the following signal (+) circuits end to end. B87 Rearview Camera signal (+) circuit terminal 1 to A11 Radio X4, terminal 5 B87 Rearview Camera signal (-) circuit terminal 4 to A11 Radio X4, terminal 15 If 2 ohms or greater Repair the open/high resistance in the appropriate circuit. If less than 2 ohms
11. Test for less than 2 ohms in the signal (-) circuit end to end. B87 Rearview Camera signal (+) circuit terminal 1 to A11 Radio X4, terminal 5 B87 Rearview Camera signal (-) circuit terminal 4 to A11 Radio X4, terminal 15 If 2 ohms or greater Test the appropriate signal circuit for an open/high resistance. If less than 2 ohms
12. Replace the B87 Rearview Camera.
13. Engine running, transmission in REVERSE.
14. Verify a clear rear vision image is displayed on the driver information display. If a clear rear vision image is not displayed Refer to «Radio Information Display Malfunction (with Monochrome Display)»(ref-609136-S14204902722014041500000) , «Radio Information Display Malfunction (with Color Display)»(ref-609136-S39982535012014041500000) . If a clear rear vision image displayed
15. All Ok.

1. Perform the «Diagnostic System Check - Vehicle»(ref-609122-S25539464382014041500000) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(ref-609122-S25032153612014041500000) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(ref-609122-S11603450302014041500000) provides an overview of each diagnostic category.

Certain factors will affect the operation of the lane departure warning system. When the system is operating properly, the green lane departure indicator will illuminate on the instrument cluster. This indicates that all of the required operating conditions to permit lane departure warning have been met. The green lane departure indicator will not appear when the system is having difficulty seeing the lines on the road or if the view of the camera on the windshield is blocked with mud, dirt, snow, ice, or slush, if the windshield is damaged, or when weather limits visibility, such as while driving in fog, rain, or snow conditions. This is normal operation, the vehicle does not need service. Additionally, lane departure warnings may occasionally occur in a properly operating vehicle due to tar marks, shadows, cracks in the road, or other road imperfections. This is normal system operation and the vehicle does not require service. The driver information center may also display LANE DEPARTURE SYSTEM UNAVAILABLE due to the temporary conditions listed above.

Lane Departure Warning Switch Circuit Malfunction

1. Ignition OFF, disconnect the harness connector at the S48D Multifunction Switch - Instrument Panel.
2. Test for less than 10 ohms between the ground circuit terminal 1 and ground. If 10 ohms or greater Ignition OFF. Test for less than 2 ohms in the ground circuit end to end. If 2 ohms or greater, repair the open/high resistance in the ground circuit. If less than 2 ohms, repair the open/high resistance in the ground connection. If less than 10 ohms
3. Ignition ON.
4. Verify the scan tool Lane Departure Warning Switch parameter is Off. If not Off Ignition OFF, disconnect the harness connector at the K109 Vehicle Camera Module. Test for infinite resistance between the signal circuit terminal 4 and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance, replace the K109 Vehicle Camera Module. If Off
5. Install a 3 A fused jumper wire between the signal circuit terminal 4 and ground.
6. Verify the scan tool Lane Departure Warning Switch parameter is On. If not On Ignition OFF, disconnect the harness connector at the K109 Vehicle Camera Module, ignition ON. Test for less than 1 V between the signal circuit and ground. If 1 V or greater, repair the short to voltage on the circuit. If less than 1 V. Test for less than 2 ohms in the signal circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, replace the K109 Vehicle Camera Module. If On
7. Test or replace the S48D Multifunction Switch - Instrument Panel.

Lane Departure Warning Switch Indicator Circuit Malfunction

1. Ignition OFF, disconnect the harness connector at the S48D Multifunction Switch - Instrument Panel.
2. Test for less than 10 ohms between the low control circuit terminal 8 and ground. If 10 ohms or greater Ignition OFF. Test for less than 2 ohms in the low control circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, replace the K109 Vehicle Camera Module. If less than 10 ohms
3. Ignition ON, test for 4.8-5.2 V between the voltage circuit terminal 3 and ground. If less than 4.8 V Ignition OFF, disconnect the harness connector at the K9 Body Control Module. Test for infinite resistance between the voltage circuit and ground. If less than infinite resistance, repair the short to ground in the circuit. If infinite resistance Test for less than 2 ohms in the voltage circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, replace the K9 Body Control Module. If greater than 5.2 V Ignition OFF, disconnect the harness connector at the K9 Body Control Module, ignition ON. Test for less than 1 V between the voltage circuit and ground. If 1 V or greater, repair the short to voltage on the circuit. If less than 1 V, replace the K9 Body Control Module. If between 4.8-5.2 V
4. Test or replace the S48D Multifunction Switch - Instrument Panel.