Object Detection: Diagnosis Hummer H2 I рестайлинг

Visual/Physical Inspection

1. Inspect for aftermarket devices which could affect the operation of the system. Refer to «Checking Aftermarket Accessories»(ref-299147-S04714420442008092200000) .
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

Rear Vision Camera System Malfunction (RPO UVC) or Rear Vision Camera System Malfunction (RPO UVB)

Diagnostic Instructions

1. Perform the «Diagnostic System Check - Vehicle»(ref-299145-S35517489322008092200000) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(ref-299145-S33690120492008092200000) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(ref-299145-S10820546452008092200000) provides an overview of each diagnostic category.

Circuit/System Testing

Rear Vision System Always On

1. Ignition OFF, disconnect the harness connector at the inside rearview mirror.
2. Ignition ON, vehicle in PARK, verify a test lamp does not illuminate between the control circuit terminal 9 and ground. If the test lamp illuminates, test the control circuit for a short to voltage. If the circuit test normal, refer to «Backup Lamps Malfunction»(ref-299113-S34359065592008092200000) .
3. If all circuits test normal, replace the inside rearview mirror.

Rear Vision System Does Not Display

1. Ignition OFF, disconnect the harness connector at the inside rearview mirror.
2. Ignition ON, vehicle in PARK, verify that a test lamp illuminates between the ignition circuit terminal 13 and ground. If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance.
3. Verify that a test lamp illuminates between the ignition circuit terminal 13 and the ground circuit terminal 8. If the test lamp does not illuminate, test the ground circuit for an open/high resistance.
4. Park brake applied, transmission in reverse, verify that a test lamp illuminates between the control circuit terminal 9 and ground. If the test lamp does not illuminate, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the BCM.
5. Ignition OFF, connect the harness connector at the inside rearview mirror. Disconnect the harness connector at the rearview camera.
6. Park brake applied, transmission in reverse, verify a test lamp illuminates between the ignition circuit terminal C and ground. If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance. If the circuit tests normal, test or replace the inside rearview mirror.
7. Park brake applied, transmission in reverse, verify a test lamp illuminates between the ignition circuit terminal C and the ground circuit terminal D. If the test lamp does not illuminate, test the ground circuit for an open/high resistance. If the circuit tests normal, test or replace the inside rearview mirror.
8. Ignition OFF, disconnect the harness connector at the inside rearview mirror.
9. Ignition ON, test for less than 1 volt between the following signal circuit terminals and ground: Video + circuit terminal 1 Video- circuit terminal 2 If greater than the specified value, test the signal circuit for a short to voltage.
10. Test for infinite resistance between the following signal circuit terminals and ground: Video + circuit terminal 1 Video- circuit terminal 2 If less than the specified value, test the signal circuit for a short to ground.
11. Test for less than 2 ohms of resistance between the video + circuit terminal 1 at the inside rearview mirror and the video + circuit terminal A at the rearview camera. If greater than the specified range, test the video+ circuit for an open/high resistance.
12. Test for less than 2 ohm of resistance between the video- circuit terminal 2 at the inside rearview mirror and the video- circuit terminal E at the rearview camera.
13. If all circuits test normal, replace the rearview camera and test the system for proper operation. If the condition continues after replacement, replace the inside rearview mirror.

1. Perform the «Diagnostic System Check - Vehicle»(ref-299145-S35517489322008092200000) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(ref-299145-S33690120492008092200000) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(ref-299145-S10820546452008092200000) provides an overview of each diagnostic category.

Diagnostic Fault Information

Diagnostic Aids

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. For normal operating characteristics of the rear vision camera system, refer to the Navigation System section of the owners manual.

Rear Vision System Always On

1. Ignition OFF, disconnect the harness connector at the rearview camera image display module.
2. Ignition ON, vehicle in PARK, verify a test lamp does not illuminate between the control circuit terminal 1 and ground. If the test lamp illuminates, test the control circuit for a short to voltage. If the circuit test normal, refer to «Backup Lamps Malfunction»(ref-299113-S34359065592008092200000) .
3. If all circuits test normal, replace the rearview camera image display module.

Rear Vision System Does Not Display

1. Ignition OFF, disconnect the harness connector at the rearview camera image display module.
2. Ignition OFF, test for greater than 1.0 ohm between the camera video signal circuit terminal 11 and ground. If less than 1.0 ohm, test the signal circuit for a short to ground. If the circuit tests normal, replace the radio.
3. Ignition ON, verify that a test lamp does not illuminate between the camera video signal circuit terminal 11 and ground. If the test lamp illuminates, test the signal circuit for a short to voltage. If the circuit tests normal, replace the radio.
4. Ignition OFF, test for greater than 1.0 ohm between the camera video signal circuit terminal 12 and ground. If less than 1.0 ohm, test the signal circuit for a short to ground. If the circuit tests normal, replace the radio.
5. Ignition ON, verify that a test lamp does not illuminate between the camera video signal circuit terminal 12 and ground. If the test lamp illuminates, test the signal circuit for a short to voltage. If the circuit tests normal, replace the radio.
6. Ignition OFF, disconnect the harness connector X4 at the radio.
7. Test for less than 1.0 ohm along the signal circuit terminal 11 to terminal 7. If greater than 1.0 ohm, repair the signal circuit for an open/high resistance.
8. Test for less than 1.0 ohm along the signal circuit terminal 12 to terminal 6. If greater than 1.0 ohm, repair the signal circuit for an open/high resistance.
9. If all circuits test normal, replace the rearview camera module.

Service Rear Vision Camera System is Displayed

1. Ignition OFF, disconnect the harness connector at the rearview camera image display module.
2. Ignition ON, vehicle in PARK, verify that a test lamp illuminates between the ignition circuit terminal 2 and ground. If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance.
3. Verify that a test lamp illuminates between the ignition circuit terminal 2 and the ground circuit terminal 3. If the test lamp does not illuminate, test the ground circuit for an open/high resistance.
4. Park brake applied, transmission in reverse, verify that a test lamp illuminates between the control circuit terminal 1 and ground. If the test lamp does not illuminate, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the body control module (BCM).
5. Ignition OFF, connect the harness connector at the rearview camera image display module and disconnect the harness connector at the rearview camera.
6. Ignition OFF, test for less than 1.0 ohm between the ground circuit terminal B and ground. If greater than 1.0 ohm, test the ground circuit for an open/high resistance. If the circuit tests normal, replace the rearview camera image display module.
7. Ignition ON, command the backup lamps with a scan tool.
8. Test for 4.8-5.2 volts between the 6-volt reference circuit terminal A and ground. If less than 4.8 volts, test the 5-volt reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the rearview camera image display module. If greater than 5.2 volts, test the 5-volt reference circuit for a short to voltage. If the circuit tests normal, replace the rearview camera image display module.
9. Ignition OFF, test for greater than 1.0 ohm between the camera video signal circuit terminal C and ground. If less than 1.0 ohm, test the signal circuit for a short to ground. If the circuit tests normal, replace the rearview camera image display module.
10. Ignition ON, verify that a test lamp does not illuminate between the camera video signal circuit terminal C and ground. If the test lamp illuminates, test the signal circuit for a short to voltage. If the circuit tests normal, replace the rearview camera image display module.
11. Ignition OFF, disconnect the rearview camera module. Test for less than 1.0 ohm along the signal circuit terminal C to terminal 9. If greater than 1.0 ohm, repair the signal circuit for an open/high resistance.
12. If all circuits test normal, replace the rearview camera.