Diagnostic Aids
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2007 GMC Yukon XL, 2007 GMC Yukon, 2007 Chevrolet Tahoe, 2007 Chevrolet Suburban, and 2007 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
- If DTC B1580 and B1590 are both set, the low reference circuit may be open, or the 5-volt reference circuit may be open, short to ground or short to voltage.
- Thoroughly inspect the wiring and connectors. An incomplete inspection of the wiring and connectors may result in misdiagnosis causing part replacement with the reappearance of the malfunction. If an intermittent malfunction exists, refer to Testing for Intermittent Conditions and Poor Connections .
DTC B1580 or B1590
| Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
| 1 | Did you perform the Diagnostic System Check - Vehicle? | - | Go to Step 2 | Go to Diagnostic System Check - Vehicle |
| 2 |
|
0.50-4.75 V | Go to Testing for Intermittent Conditions and Poor Connections | Go to Step 3 |
| 3 | Is there a horizontal and vertical DTC set on the same mirror? | - | Go to Step 6 | Go to Step 4 |
| 4 |
|
0.50 V | Go to Step 5 | Go to Step 8 |
| 5 |
|
4.75-5.25 V | Go to Step 12 | Go to Step 9 |
| 6 |
|
4.75-5.25 V | Go to Step 7 | Go to Step 10 |
| 7 | Measure the voltage between the 5-volt reference circuit and the low reference circuit at the mirror harness connector. Does the voltage measure within the specified range? |
4.75-5.25 V | Go to Step 12 | Go to Step 11 |
| 8 | Test for a short to voltage on the mirror position signal circuit. Refer to Circuit Testing
and Wiring Repairs
. Did you find and correct the condition? |
- | Go to Step 16 | Go to Step 13 |
| 9 | Test the mirror position signal circuit for an open, high resistance, short to ground or battery. Refer to Circuit Testing
and Wiring Repairs
. Did you find and correct the condition? |
- | Go to Step 16 | Go to Step 13 |
| 10 | Test the 5-volt reference circuit for an open, high resistance, short to ground or battery. Refer to Circuit Testing
and Wiring Repairs
. Did you find and correct the condition? |
- | Go to Step 16 | Go to Step 13 |
| 11 | Test the low reference circuit for an open, high resistance or short to battery. Refer to Circuit Testing
and Wiring Repairs
. Did you find and correct the condition? |
- | Go to Step 16 | Go to Step 13 |
| 12 | Inspect for poor connections at the harness connector of the power mirror. Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
. Did you find and correct the condition? |
- | Go to Step 16 | Go to Step 14 |
| 13 | Inspect for poor connections at the harness connector of the DDS/PDS. Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
. Did you find and correct the condition? |
- | Go to Step 16 | Go to Step 15 |
| 14 | Replace the power mirror. Refer to Mirror Replacement - Power . Did you complete the replacement? |
- | Go to Step 16 | - |
| 15 | Replace the DDS/PDS. Refer to Control Module References
for replacement, setup, and programming. Did you complete the replacement? |
- | Go to Step 16 | - |
| 16 |
|
- | Go to Step 2 | System OK |