Object Detection System: Diagnosis Chevrolet Silverado 2500 HD

DIAGNOSTIC CODE INDEX

DIAGNOSTIC CODE INDEX

Diagnostic Starting Point - Object Detection

Begin the system diagnosis by reviewing the system Description and Operation. Refer to Object Detection Description and Operation . Reviewing the Description and Operation information will help you determine the correct symptom diagnostic procedure when a malfunction exists. Reviewing the Description and Operation information will also help you determine if the condition described by the customer is normal operation. Refer to Symptoms - Object Detection in order to identify the correct procedure for diagnosing the system and where the procedure is located.

Scan Tool Output Controls

Scan Tool Output Controls

Scan Tool Data List

The scan tool data list contains all the object detection system related parameters that are available on the scan tool. The parameters in the list are arranged in alphabetical order. The column, Data List, indicates the location of the parameter within the scan tool menu selections.

Use the object detection scan tool data list as directed by a diagnostic table or in order to supplement the diagnostic procedures. Begin all of the diagnostic procedures with the Diagnostic System Check - Vehicle. Use the scan tool data list after the following is determined

1. There is no published diagnostic trouble code (DTC) procedure nor published symptom procedure for the customer concern.
2. The DTC or symptom diagnostic procedure indicated by the diagnostic system check does not resolve the customer concern.

The typical data values are obtained from a properly operating vehicle under the conditions specified in the second row of the scan tool data list table. Comparison of the parameter values from the suspect vehicle with the typical data values may reveal the source of the customer concern.

Scan Tool Data List

Scan Tool Data Definitions

The scan tool data definitions contain a brief description of all object detection system related parameters available on the scan tool. The parameters that are available on the scan tool are listed below in alphabetical order.

Diagnostic Instructions

1. Perform the «Diagnostic System Check - Vehicle»(ref-278018-S19353494792008012100000) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(ref-278018-S03493196652008012100000) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(ref-278018-S38264170562008012100000) provides an overview of each diagnostic category.

Conditions for Running the DTC

Ignition voltage is between 9-16 volts.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector of the suspect rear object alarm sensor.
2. Test for less than 1.0 ohm of resistance between the low reference circuit and ground. If greater than 1.0 ohm, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the rear object alarm module.
3. Ignition ON with the transmission in reverse, test for 8.2-8.8 volts between the rear object alarm sensor supply voltage circuit and the low reference circuit. If greater than 8.8V, test the supply voltage circuit for a short to voltage. If the circuit tests normal, replace the object alarm module. If less than 8.2V, test the supply voltage circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the rear object alarm module.
4. Ignition OFF, test for greater than 1.0 ohm of resistance between the rear object alarm sensor signal circuit and ground. If less than 1.0 ohm, test the signal circuit for a short to ground. If the circuit tests normal, replace the rear object alarm module.
5. Ignition ON, verify that a test lamp does not illuminate between the rear object alarm sensor signal circuit and ground. If the test lamp illuminates, test the signal circuit for a short to voltage. If the circuit tests normal, replace the rear object alarm module.
6. Ignition OFF, disconnect the rear object alarm module. Test for less than 1.0 ohm of resistance along the signal circuit. If greater than 1.0 ohms, repair the signal circuit for an open/high resistance.
7. If all circuits test normal, replace the suspect rear object alarm sensor.

1. Perform the «Diagnostic System Check - Vehicle»(ref-278018-S19353494792008012100000) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(ref-278018-S03493196652008012100000) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(ref-278018-S38264170562008012100000) provides an overview of each diagnostic category.

Ignition voltage is between 9-16 volts.

Conditions for Setting the DTC

The object alarm module has detected that the switch circuit is determined to be shorted to ground and must exist for 300 milliseconds.

Action Taken When the DTC Sets

1. The object alarm module commands ON the telltale assembly information center red indicator and disables the object detection system.
2. The object alarm module will send a serial data message to the instrument panel cluster (IPC) to display SERVICE PARK ASSIST message in the driver information center (DIC) and a chime will sound from the radio speakers.

1. Ignition OFF, disconnect the harness connector at the I/P multifunction assembly switch.
2. Ignition ON, verify the scan tool Park Assist Switch parameter is Inactive. If not Inactive, test the rear park disable signal circuit for a short to ground. If the circuit tests normal, replace the object alarm module
3. Ignition OFF, test for greater than 1.0 ohm of resistance between the rear park assist disable signal of the I/P multifunction assembly switch and ground. If less than 1.0 ohm, test the rear park assist disable signal circuit at the I/P multifunction assembly switch for a short to ground. If all circuits test normal, replace the I/P multifunction assembly switch.

1. Perform the «Diagnostic System Check - Vehicle»(ref-278018-S19353494792008012100000) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(ref-278018-S03493196652008012100000) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(ref-278018-S38264170562008012100000) provides an overview of each diagnostic category.

Ignition voltage is between 9-16 volts.

The following condition must exist for 300 milliseconds

The object alarm module has detected that one of the three indicator control circuits for the rear display is determined to be open or shorted.

1. The object alarm module commands ON the telltale assembly information center red indicator and disables the object detection system.
2. The object alarm module will send a serial data message to the instrument panel cluster (IPC) to display SERVICE PARK ASSIST message in the driver information center (DIC) and a chime will sound from the radio speakers.

1. Ignition OFF, disconnect the harness connector at the telltale assembly information center.
2. Ignition ON, place the transmission in reverse. Verify a test lamp illuminates when connected between the supply voltage circuit terminal A and ground. If the test lamp does not illuminate, test the supply voltage circuit for a short to ground or an open/high resistance.
3. Ignition ON, scan tool installed, place the transmission in reverse. Verify that a test lamp illuminates when connected between the supply voltage circuit terminal A and each indicator control circuit terminals B, C, and D while performing the scan tool special functions LED test. If the test lamp does not illuminate for one or more indicator control circuits, test the suspect indicator control circuit for a short to ground or an open/high resistance. If all the circuit(s) test normal, replace the telltale assembly information center.
4. If all circuits test normal, test or replace the object alarm module.

1. Perform the «Diagnostic System Check - Vehicle»(ref-278018-S19353494792008012100000) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(ref-278018-S03493196652008012100000) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(ref-278018-S38264170562008012100000) provides an overview of each diagnostic category.

Ignition voltage is between 9-16 volts.

When the calibration data set is not programmed in the object alarm module upon startup.

1. The object alarm module commands ON the information center telltale red indicator.
2. The object alarm module will send a serial data communication message to the instrument panel cluster (IPC) to display SERVICE PARK ASSIST message on the driver information center (DIC) and the chime sounds.

Conditions for Clearing the DTC

1. The DTC becomes history when the conditions for setting the DTC are no longer present.
2. The history DTC clears after 40 malfunction-free warm-up cycles.

Ignition ON, scan tool installed, verify that DTC B1008 is a history code

1. If DTC B1008 is current, perform the programming and setup procedure for the front or rear object alarm module.

1. Perform the «Diagnostic System Check - Vehicle»(ref-278018-S19353494792008012100000) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(ref-278018-S03493196652008012100000) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(ref-278018-S38264170562008012100000) provides an overview of each diagnostic category.

Ignition voltage is between 9-16 volts.

1. The object detection module VIN digits does not match the digits stored in the BCM.
2. The VIN stored in the BCM does not match that of the vehicle.

1. The object alarm system is disabled.
2. The object alarm module commands ON the information center telltale red indicator.
3. The object alarm module sends a serial data message to the instrument panel Cluster (IPC) to display SERVICE PARK ASSIST message on the driver information center (DIC), and the chime will sound.

1. The DTC becomes history when the conditions for setting the DTC are no longer present. The VIN that is stored in the object alarm module matches the VIN stored in the BCM.
2. The history DTC clears after 40 malfunction-free warm-up cycles.

Ignition ON, scan tool installed, verify that DTC B1015 is a history code and verify that there is no VIN mismatch with the BCM, object alarm module and the vehicle VIN.

1. If any VIN mismatch exists, program the module with the correct VIN.

1. Perform the «Diagnostic System Check - Vehicle»(ref-278018-S19353494792008012100000) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(ref-278018-S03493196652008012100000) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(ref-278018-S38264170562008012100000) provides an overview of each diagnostic category.

Ignition voltage is between 9-16 volts.

1. The object alarm module commands ON the information center telltale red indicator.
2. The object alarm module sends a serial data communication message to the instrument panel cluster (IPC) to display SERVICE PARK ASSIST message in the driver information center (DIC), and the chime will sound.

1. The DTC becomes history when the conditions for setting the DTC are no longer present.
2. The object alarm module receives a clear code command from the scan tool.

1. Ignition ON and the scan tool installed, verify that DTC B1325 is not current. If current, refer to «DTC B1325»(ref-278006-S38705345792008012100000) .
2. Ignition ON and the scan tool installed, verify that DTC B0958, B0959, B0960 or B0961 is not current. If current, refer to «DTC B0958, B0959, B0960, or B0961»(ref-278044-S27001467492008012100000) .
3. Ignition ON and with the transmission range in REVERSE, verify that the scan tool Sensor Feed Voltage Output parameter is between 7.2-9.2 V. If less than 7.2 V, test the supply voltage circuit of the object alarm sensor for a short to ground or an open/high resistance. If the circuit tests normal, replace the object alarm module. If greater than 9.2 V, test the supply voltage circuit of the object alarm sensor for a short to voltage. If the circuits test normal, replace the object alarm module.
4. If all circuits test normal, test or replace the suspect object alarm sensor.

Visual/Physical Inspection

1. Inspect for aftermarket devices which could affect the operation of the system. Refer to «Checking Aftermarket Accessories»(ref-278019-S10639375482008012100000) .
2. Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.
3. Make sure the rear parking assist sensors located on the vehicle rear bumper are clear. Remove any snow, mud or ice that is blocking the sensors.

Symptom List

Information Center Telltale Malfunction

1. Perform the «Diagnostic System Check - Vehicle»(ref-278018-S19353494792008012100000) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(ref-278018-S03493196652008012100000) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(ref-278018-S38264170562008012100000) provides an overview of each diagnostic category.

1. Ignition OFF, disconnect the harness connector at the object alarm module.
2. Ignition ON, with the telltale assembly supply voltage circuit connected to B+, verify that each telltale assembly indicator illuminates when each indicator control circuit terminal(s) B, C and D is connected to ground. If one or two indicators of the telltale assembly does not illuminate, test the control circuit(s) for a short to ground or an open/high resistance. If the circuit(s) test normal, replace the telltale assembly information center. If all the indicators of the telltale assembly does not illuminate, test the supply voltage circuit for a short to ground or an open/high resistance. If the circuit(s) test normal, replace the telltale assembly information center.
3. If all circuits test normal, test or replace the rear object alarm module.