Diagnostic Aids
WARNING: This page is about a different car, the 2007 Hummer H2. However, it is still accessible from the selected car via links, so may be relevant.
- If DTC B1580 is set by itself, the left horizontal position sensor signal circuit may be open, shorted to ground or battery.
- If DTC B1590 is set by itself, the left vertical position sensor signal circuit may be open, shorted to ground or battery.
- If DTC B1610 is set by itself, the right horizontal position sensor signal circuit may be open, shorted to ground or battery.
- If DTC B1620 is set by itself, the right vertical position sensor signal circuit may be open, shorted to ground or battery.
- If DTCs B1580 and B1590 are both set, the left 5-volt reference or low reference circuit(s) may be open, shorted to ground or battery.
- If DTCs B1610 and B1620 are both set, the right 5-volt reference or low reference circuit(s) may be open, shorted to ground or battery.
DTC B1580, B1590, B1610, or B1620
| Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
| Schematic Reference: Outside Rearview Mirror Schematics Connector End View Reference: Mirror Connector End Views |
||||
| 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 DDM/PDM. 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 . Did you complete the replacement? |
- | Go to Step 16 | - |
| 15 | Replace the appropriate door module. 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 |