Circuit Description
The mirror horizontal and vertical position sensors are potentiometers. The driver door module (DDM) and passenger door module (PDM) provide these sensors with a 5-volt reference circuit and a low reference circuit. The DDM/PDM monitors the horizontal and vertical position sensor signal circuits which change values based on mirror position. These voltage values are used to determine mirror position and can be set into memory. When the DDM/PDM receives a memory recall request, the DDM/PDM will control the power mirror to the memory position based on the horizontal and vertical position sensor signal values.
DTC Descriptors
This diagnostic procedure supports the following DTCs:
| • | DTC B1580 Mirror Horizontal Position Sensor Circuit |
| • | DTC B1590 Mirror Vertical Position Sensor Circuit |
| • | DTC B1610 Passenger Mirror Horizontal Position Sensor Circuit |
| • | DTC B1620 Passenger Mirror Vertical Position Sensor Circuit |
Conditions for Running the DTC
Battery voltage must between 9-16 volts.
Conditions for Setting the DTC
The horizontal and/or vertical position sensor signals are greater than 4.75 volts or less than 0.50 volts.
Action Taken When the DTC Sets
Memory movements on the malfunctioning axis are disabled.
Conditions for Clearing the DTC
When the fault is no longer present, the DDM/PDM changes the current DTC to a history DTC. The DDM/PDM will clear the history DTC after 50 fault free ignition cycles.
Diagnostic Aids
| • | 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. |
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 | |
2 |
Does the scan tool indicate that the left and right mirror horizontal and vertical position parameters are within the specified range? | 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 |
Does the scan tool indicate that the mirror position parameter is less than the specified value? | 0.50 V | Go to Step 5 | Go to Step 8 |
5 |
Does the scan tool indicate that the mirror position parameter is within the specified range? | 4.75-5.25 V | Go to Step 12 | Go to Step 9 |
6 |
Does the voltage measure within the specified range? | 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 Outside Rearview 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 |
Does the DTC reset? | -- | Go to Step 2 | System OK |
