Object Detection System: Diagnosis Cadillac STS I facelift

DIAGNOSTIC CODE INDEX

DIAGNOSTIC CODE INDEX

Diagnostic Starting Point - Object Detection

Begin the system diagnosis with the Diagnostic System Check - Vehicle . The Diagnostic System Check will provide the following information

1. The identification of the control module which commands the system
2. The ability of the control module to communicate through the serial data circuit
3. The identification of any stored diagnostic trouble codes (DTCs) and their status

The use of Diagnostic System Check - Vehicle , will identify the correct procedure for diagnosing the system and where the procedure is located.

Diagnostic Trouble Code (DTC) Displaying

This vehicle is equipped with an on-board diagnostic display feature capable of displaying DTCs using the 3 indicators on the rear parking assist display. After the bulb check has been completed, the red outside indicator flashes to indicate a malfunction with the system. The module disables operation of the ultrasonic rear parking assist (URPA) system under this condition.

In order to enter the diagnostic mode, complete the following actions

1. With the ignition turned OFF, short the rear parking assist diagnostic connector to ground while the vehicle is in PARK. Refer to «Component Connector End Views»(ref-338150-S01247117932009081700000) for the location of the rear parking assist diagnostic connector.
2. Turn the ignition ON.
3. Place your foot on the brake.
4. Shift the vehicle into REVERSE within 5 seconds. If the vehicle is not shifted into reverse within 5 seconds after turning the ignition ON, the diagnostic mode will still be initiated. However, a reverse input wiring fault will be registered as sequence #7 as shown in the Diagnostic Indicator table below. Refer to «Diagnostic Trouble Code (DTC) Clearing»(ref-338154-S19387149062009081700000) for specific steps on how to clear DTCs. After the reverse input wiring code is cleared, repeat the DTC displaying steps in order to enter the diagnostic mode.

When the diagnostic mode is first entered, the rear parking assist display displays the amber outside indicator and the red outside indicator. Then the indicators on the rear parking assist display will display one or more of the sequences in the table below to indicate where the fault exists within the rear parking assist system. Refer to Diagnostic Trouble Code (DTC) Clearing for the specific steps on how to clear diagnostic trouble codes.

Diagnostic Indicators

Diagnostic Trouble Code (DTC) Clearing

The rear parking assist diagnostic sequences may be cleared in one of the following ways

Diagnostic Instructions

1. Perform the «Diagnostic System Check - Vehicle»(ref-338149-S41903538652009081700000) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(ref-338149-S37154416862009081700000) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(ref-338149-S02595537362009081700000) provides an overview of each diagnostic category.

Conditions for Running the DTC

The system voltage is between 9-16 volts.

Conditions for Setting the DTC

The VDAAW module has not learned a calibration value.

Action Taken When the DTC Sets

1. The VDAAW module disables the system.
2. The SERVICE LANE DEPARTURE SYSTEM message is displayed on the DIC.

Conditions for Clearing the DTC

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.

1. Perform the «Diagnostic System Check - Vehicle»(ref-338149-S41903538652009081700000) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(ref-338149-S37154416862009081700000) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(ref-338149-S02595537362009081700000) provides an overview of each diagnostic category.

Battery voltage is between 9-16 volts.

The VDAAW module has detected an internal failure.

The VDAAW module will disable the VDAAW feature.

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.

Visual/Physical Inspection

1. Inspect for aftermarket devices which could affect the operation of the system. Refer to «Checking Aftermarket Accessories»(ref-338151-S01119782592009081700000) .
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

Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom

1. «Rear Parking Assist Malfunction»(ref-338154-S34259475152009081700000)
2. «Rear Parking Assist Inoperative - Red Indicator Flashes»(ref-338154-S11894587582009081700000)
3. «Side Object Sensor Malfunction»(ref-338154-S02438318542009081700000)
4. «Lane Departure Warning System Malfunction»(ref-338154-S23133582182009081700000)

1. Perform the «Diagnostic System Check - Vehicle»(ref-338149-S41903538652009081700000) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(ref-338149-S37154416862009081700000) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(ref-338149-S02595537362009081700000) provides an overview of each diagnostic category.

Diagnostic Aids

1. The RPA system is equipped with an on-board diagnostic display feature capable of displaying diagnostic trouble codes from the RPA display. Before using this diagnostics, it is necessary to get familiar and understand how the on-board diagnostic feature operates. Refer to «Diagnostic Trouble Code (DTC) Displaying»(ref-338154-S41469204742009081700000) and to «Diagnostic Trouble Code (DTC) Clearing»(ref-338154-S19387149062009081700000) on how the diagnostic trouble codes are displayed and cleared from the RPA display system.
2. Make sure the rear park assist (RPA) object sensors located on the vehicle rear bumper are clean and clear. Remove any objects that is blocking the sensors.
3. Inspect for after market devices which could affect the operation of the RPA system.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the rear object sensor control module.
2. Test for less than 1.0 ohm between the ground circuit terminal 12 and ground. If greater than the specified value, test the ground circuit for an open/high resistance.
3. Ignition ON, verify that a test lamp illuminates when connected between the ignition 1 voltage circuit terminal 13 and ground. If the test lamp does not illuminate, test the ignition 1 voltage circuit for a short to ground or an open/high resistance.
4. Ignition ON, transmission in reverse, verify that a test lamp illuminates when connected between the backup lamp supply voltage circuit terminal 15 and ground. If the test lamp does not illuminate, test the backup lamp supply voltage circuit for a short to ground or an open/high resistance. If circuit tests normal replace the rear integration module (RIM).
5. Start the engine, scan tool installed, with the vehicle drive wheels raised and the vehicle placed in drive or 1st gear. Verify that the speedometer value matches the scan tool Vehicle Speed parameter in the ECM Engine Data List. If the speedometer does not match the scan tool Vehicle Speed parameter, test the vehicle speed signal circuit terminal 18 for a short to voltage, a short to ground or an open/high resistance. If the circuit tests normal, replace the ECM.
6. Ignition OFF, connect the harness connector at the rear object sensor control module.
7. Disconnect the harness connector at the rear parking assist display.
8. Ignition ON, verify a test lamp illuminates between the telltale assembly supply voltage circuit terminal A and ground. If the test lamp does not illuminate, test the circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the rear object sensor control module.
9. Connect a test lamp one at a time between the 12 volt supply circuit terminal A and the control circuits listed below: Left amber LED control circuit terminal B Center amber LED control circuit terminal C Red LED control circuit terminal D
10. Ignition ON, transmission in reverse, place an object less than 0.3 m (11 in) away from the rear bumper. The test lamp should illuminate at each control circuit. If the test lamp does not illuminate at any of the control circuits, test the appropriate control circuit for a short to voltage or an open/high resistance. If the circuits test normal, replace the rear object sensor control module.
11. If all circuits test normal, test or replace the rear parking assist display.

Component Testing

1. Ignition OFF, disconnect the harness connector at the RPA display.
2. Connect a 10A fused jumper wire between 12-volt reference circuit terminal A and B+.
3. Connect a 10A fused jumper wire between control circuit terminal and ground of the appropriate LED listed below: Left amber LED control circuit terminal B Center amber LED control circuit terminal C Red LED control circuit terminal D
4. Verify that the appropriate LED illuminates. If the component does not perform as specified, replace the RPA display.

1. Perform the «Diagnostic System Check - Vehicle»(ref-338149-S41903538652009081700000) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(ref-338149-S37154416862009081700000) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(ref-338149-S02595537362009081700000) provides an overview of each diagnostic category.

1. The RPA system is equipped with an on-board diagnostic display feature capable of displaying diagnostic trouble codes from the RPA display. Before using this diagnostics, it is necessary to get familiar and understand how the on-board diagnostic feature operates. Refer to «Diagnostic Trouble Code (DTC) Displaying»(ref-338154-S41469204742009081700000) and to «Diagnostic Trouble Code (DTC) Clearing»(ref-338154-S19387149062009081700000) on how the diagnostic trouble codes are displayed and cleared from the RPA display system.
2. Make sure the rear park assist (RPA) object sensors located on the vehicle rear bumper are clean and clear. Remove any objects that is blocking the sensors.
3. Inspect for after market devices which could affect the operation of the RPA system.

Diagnostic Indicator Pattern 1

1. Enter the diagnostic mode. Refer to «Diagnostic Trouble Code (DTC) Displaying»(ref-338154-S41469204742009081700000) . Verify that the Diagnostic Indicator Pattern 1 is displayed as shown in the diagnostic indicator list. If the Diagnostic Indicator Pattern 1 does not display after entering the diagnostic mode, test the signal circuit terminal 16 for a short to voltage or an open/high resistance. If the circuit tests normal, test or replace the rear object sensor control module.
2. Proceed to the next Diagnostic Indicator Pattern displayed.

Diagnostic Indicator Pattern 2, 3, 4 and 5

1. Ignition OFF, disconnect the harness connector of the appropriate rear object sensor.
2. Ignition OFF for 30 seconds, test for less than 5.0 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 REVERSE, test for 8.0-9.0 volts between the voltage reference circuit terminal 3 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, disconnect the harness connector at the object alarm module.
5. Ignition ON, test for less than 1.0 volt between the appropriate signal circuit listed below and ground: LR middle object sensor signal circuit terminal 2 LR corner object sensor signal circuit terminal 1 RR middle object sensor signal circuit terminal 3 RR corner object sensor signal circuit terminal 4 If greater than the specified range, test the signal circuit for a short to voltage.
6. Ignition OFF, test for infinite resistance between the appropriate signal circuit listed below and ground: LR middle object sensor signal circuit terminal 2 LR corner object sensor signal circuit terminal 1 RR middle object sensor signal circuit terminal 3 RR corner object sensor signal circuit terminal 4 If not than the specified value, test the signal circuit for a short to ground.
7. Test for less than 2 ohms between the signal circuit terminal 1 at the sensor harness connector and the appropriate signal circuit listed below: LF middle object sensor signal circuit terminal 2 LF corner object sensor signal circuit terminal 1 RF middle object sensor signal circuit terminal 3 RF corner object sensor signal circuit terminal 4 If greater than the specified range, test the signal circuit for an open/high resistance.
8. If all circuits test normal, test or replace the appropriate rear object alarm sensor.

Diagnostic Indicator Pattern 6

1. Ignition OFF, disconnect the harness connector at the rear object sensor control module.
2. Ignition ON, test for 9.5 volts between the chime control circuit terminal 22 and ground. If less than the specified value, test the chime control circuit for a short to ground or an open/high resistance. If all circuits test normal, replace the BCM. If greater than the specified value, refer to «Speaker Malfunction»(ref-338122-S04919276902009081700000) .

Diagnostic Indicator Pattern 7

Verify that the Diagnostic Indicator Pattern 7 displays as shown in diagnostic indicator list.

1. If the diagnostic indicator pattern 7 is displayed, refer to «Diagnostic Trouble Code (DTC) Displaying»(ref-338154-S41469204742009081700000) and to «Diagnostic Trouble Code (DTC) Clearing»(ref-338154-S19387149062009081700000) .

Diagnostic Indicator Pattern 8 and 9

1. While still in the diagnostic mode, disconnect the rear object sensors one at a time and verify that the indicator pattern 8 or 9 does not display after the suspect sensors has been disconnected. If the indicator pattern 8 or 9 continues to display after each sensor has been disconnected and reconnected, test the object sensor supply voltage circuit and the low reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the rear object sensor control module. If the indicator pattern 8 and 9 does not display after disconnecting the suspect sensor, replace the suspect sensor.
2. If all circuits test normal, replace the object sensor control module.

1. Perform the «Diagnostic System Check - Vehicle»(ref-338149-S41903538652009081700000) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(ref-338149-S37154416862009081700000) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(ref-338149-S02595537362009081700000) provides an overview of each diagnostic category.

1. The side object sensors are capable of detecting when they are blocked by mud, snow, or ice build up on the fascia. When a sensor is blocked, the driver information center (DIC) will display SIDE BLIND ZONE SYSTEM UNAVAILABLE. The SBZA system transitions back to the normal operating state when the blockage is removed. Bumper sticks, labels, and heavy rain storms may also cause this condition.
2. The SBZA system is designed to ignore stationary objects; however, the system may occasionally detect guard rails, signs, trees, shrubs, or other stationary objects as an object in the blind zone. This is normal system operation and does not require service.
3. The SBZA system may indicate an object in the blind zone if a trailer is attached to the vehicle, or a bicycle or object is extending out to either side of the vehicle.
4. The SBZA system is disabled if any of the following occurs: The door modules determine that a malfunction exists in the side object indicator. There is a loss of serial data communication or a SBZA system DTC is set. The SBZA system is manually disabled by the driver through the DIC.
5. Each side object sensor maintains a history buffer of the previous 16 SBZA events which can be accessed using the scan tool. These parameters may be used to help diagnose a system malfunction or an intermittent concern.
6. Because the sensors are identical, they may be swapped from one side of the vehicle to the other in an attempt to isolate a concern. Sensors should NOT be swapped from one vehicle to another.

Right Side Object Sensor Malfunction

1. Ignition OFF, disconnect the harness connector at the right side object sensor.
2. Test for less than 5 ohms between the ground circuit terminals listed below and ground: Terminal 5 Terminal 6 If greater than the specified range, test the appropriate ground circuit for an open/high resistance.
3. Ignition ON, verify that a test lamp illuminates between the B+ circuit terminal 2 and ground. If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
4. If all circuits test normal, replace the right side object sensor.

Left Side Object Sensor Malfunction

1. Ignition OFF, disconnect the harness connector at the left side object sensor.
2. Test for less than 5 ohms between the ground circuit terminal 5 and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
3. Ignition ON, verify that a test lamp illuminates between the B+ circuit terminal 2 and ground. If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
4. Ignition OFF, disconnect the harness connector at the right side object sensor.
5. Ignition ON, test for less than 1 volt between the serial data circuit terminal 4 and ground. If greater than the specified range, test the serial data circuit for a short to ground.
6. Test for infinite resistance between the serial data circuit terminal 4 and ground. If not the specified value, test the serial data circuit for a short to ground.
7. Test for less than 2 ohms between the serial data circuit terminal 4 at the left side object sensor harness connector and the serial data circuit terminal 4 at the right side object sensor harness connector. If greater than the specified range, test the serial data circuit for an open/high resistance.
8. If all circuits test normal, replace the left side object sensor.

Side Object Indicator Malfunction

1. Ignition OFF, disconnect the X3 and X4 harness connectors at the appropriqate door module.
2. Install a 3A fused jumper wire between the control circuit terminal 4 X3 and B+. Install a jumper wire between the low reference circuit terminal 7 X4 and ground.
3. Ignition ON, verify the indicator is illuminated. If the indicator is not illuminated, test the control circuit and the low reference circuit for a short to voltage, short to ground, or an open/high resistance. If the circuits test normal, test or replace the appropriate outside rearview mirror.
4. If all circuits test normal, replace the appropriate door module.

1. Perform the «Diagnostic System Check - Vehicle»(ref-338149-S41903538652009081700000) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(ref-338149-S37154416862009081700000) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(ref-338149-S02595537362009081700000) provides an overview of each diagnostic category.

Diagnostic Fault Information

1. Ignition OFF for 120 seconds, disconnect the harness connector at the VDAAW module.
2. Ignition OFF, test for less than 1.0 ohm between the ground circuit terminal 4 and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
3. Ignition ON, verify a test lamp illuminates between the B+ circuit terminal 2 and ground. If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
4. If all circuits test normal, replace the VDAAW module.