Circuit Description
The driver door module (DDM) and the passenger door module (PDM) receive vertical and horizontal position signals from the mirrors. These signals are used by the DDM and PDM for memory recall functions to determine the vertical and horizontal positions of the mirrors. The DDM and PDM command the mirror memory settings based on the voltage level they receive back from the position sensors. Each door module provides a 5 volt supply, a signal, and a ground circuit to the sensors. The sensors are variable resistors that the DDM and PDM monitor the voltage level across. When a memory setting is recalled, the DDM and PDM command the mirror motors in the appropriate direction until the position sensors are within the voltage range stored in memory. The DDM and PDM monitor the mirror position sensors 5 volt supply circuits to determine if the voltage level received is out of range. If the DDM or PDM detects a voltage level out of range for greater than 2 seconds, a DTC is set.
Conditions for Setting the DTC
| • | The DDM or PDM detects a mirror vertical or horizontal position sensor supply voltage range under 4.0 volts or over 5.2 volts. |
| • | Condition must be present for 2 seconds. |
Action Taken When the DTC Sets
| • | Stores a history DTC B2286 or B2287 in DDM or PDM memory. |
| • | These DTCs can only be set as a history code even if the malfunction is current. |
| • | No driver warning message will be displayed for this DTC. |
Conditions for Clearing the DTC
| • | The DDM or PDM detects the mirror vertical and horizontal position sensor supply voltage range between 4.0-5.2 volts for greater than 2 seconds, and: |
| • | The DTC is cleared using the IPC clearing feature, or |
| • | The DTC is cleared using a scan tool. |
Diagnostic Aids
| • | The following conditions may cause an intermittent malfunction: |
| - | There is an intermittent short to ground or voltage in a mirror position sensor reference circuit. |
| - | There is an intermittent short to voltage in a mirror position sensor signal circuit. |
| - | A mirror vertical or horizontal sensor is shorted internally. |
| • | If the DTC does not reset after the code is cleared, then the problem may be intermittent. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems. |
Test Description
The numbers below refer to the step numbers on the diagnostic table.
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This tests the mirror position sensor reference voltage using a scan tool. Normal reference voltage range is between 4.0-5.2 volts.
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This test determines whether the mirror position sensor is shorted internally using a scan tool with the mirror disconnected. Reference voltage with the mirror disconnected is approximately 5.0 volts.
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This tests for a short to ground in the mirror position sensor reference circuit.
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This test determines whether the mirror position sensor reference circuit or the mirror position sensor signal circuit is short to voltage. Reference voltage with the mirror position sensor reference circuit short to voltage is B+.
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
Schematic Reference: Door Control Module Schematics Connector End View Reference: Power Door Systems Connector End Views | ||||
1 | Did you perform the Door Systems Diagnostic System Check? | -- | Go to Step 2 | |
Does the scan tool indicate that the Position Sensor Ref parameter is within the specified range? | 4.0-5.2 V | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 | |
Does the scan tool indicate that the Position Sensor Ref parameter is within the specified range? | 4.0-5.2 V | Go to Step 9 | Go to Step 4 | |
Does the scan tool indicate that the Position Sensor Ref parameter is less than the specified value? | 4.0-5.2 V | Go to Step 6 | Go to Step 5 | |
Does the scan tool indicate that the Position Sensor Ref parameter is equal to battery positive voltage? | -- | Go to Step 7 | Go to Step 8 | |
6 | Test the appropriate 5V reference circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 13 | Go to Step 10 |
7 | Test the appropriate 5V reference circuit for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 13 | Go to Step 10 |
8 | Test the appropriate signal circuit(s) for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 13 | Go to Step 10 |
9 | Inspect for poor connections at the harness connector of the appropriate mirror. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 13 | Go to Step 11 |
10 | Inspect for poor connections at the harness connector of the appropriate door module. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 13 | Go to Step 12 |
11 | Replace the appropriate mirror. Refer to Outside Rearview Mirror Replacement . Did you complete the replacement? | -- | Go to Step 13 | -- |
12 | Replace the appropriate door module. Refer to Door Control Module Replacement . Did you complete the replacement? | -- | Go to Step 13 | -- |
13 |
Does the DTC reset? | -- | Go to Step 2 | System OK |
