• | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
• | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
• | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
---|---|---|---|---|
Position Sensor 5-Volt Reference | B1580, B1590 | B1580, B1590 | B1580, B1590 | -- |
Driver/Passenger Mirror Horizontal Position Sensor Signal | B1580 | 1 | B1580 | -- |
Driver/Passenger Mirror Vertical Position Sensor Signal | B1590 | 1 | B1590 | -- |
Left/Right Mirror Motor Horizontal Control | B1544 04, B1605 02 | B1544 04, B1605 04 | B1605 01 | -- |
Left/Right Mirror Motor Common Control | B1544 04, B1600 04, B1605 04, B1544 02 | B1544 04, B1600 04, B1605 04 | B1544 01 | -- |
Left/Right Mirror Motor Vertical Control | B1544 04, B1600 02 | B1544 04, B1600 04 | B1600 01 | -- |
Low Reference | B1580, B1590 | B1580, B1590 | B1580, B1590 | -- |
1. Memory Mirror Malfunction |
The Driver Door Module (DDM) or Passenger Door Module (PDM) controls the mirror horizontal and vertical motors through the use of bi-directional motor controls. When the mirror is commanded up and down, voltage or ground is supplied to the mirror vertical motor through the mirror motor up/down control circuit and voltage or ground is supplied through the mirror motor common control circuit.
Horizontal controls operate in the same manner with the mirror motor left/right control circuit supplying voltage or ground and the mirror motor common control circuit suppling voltage or ground to the mirror horizontal motor when the mirror is commanded right and left.
The DDM and PDM determine the position of the outside rearview mirrors based on inputs from two mirror position sensors, one for vertical position, the other for horizontal position. 5 volts is applied to each sensor through a shared 5-volt reference circuit and a shared low reference circuit supplies ground. Each sensor has an individual signal circuit which provides position voltage to the DDM/PDM.
Outside Rearview Mirror Schematics
Outside Mirror Description and Operation
Control Module References for scan tool information
⇒ | If the parameter does not cycle between the specified values, replace the DDM. |
⇒ | If the parameter does not cycle between the specified values, replace the DDM. |
⇒ | If a mirror does not move in all the commanded directions refer to, Mirror Motor Circuit Test. |
⇒ | If a mirror does not adjust to the stored memory setting refer to, Mirror Position Sensor Circuit Test. |
⇒ | If the test lamp remains OFF during either of the commands, test for a short to ground or an open/high resistance on either control circuits. If the circuits test normal, replace the door module. |
⇒ | If the test lamp remains OFF during either of the commands, test for a short to ground or an open/high resistance on either control circuits. If the circuits test normal, replace the door module. |
⇒ | If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the appropriate door module. |
⇒ | If less than the specified range, test the 5-volt reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the appropriate door module. |
⇒ | If greater than the specified range, test the 5-volt reference circuit for a short to voltage. If the circuit tests normal, replace the door module. |
⇒ | If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the door module. |
⇒ | If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the door module. |
⇒ | If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the door module. |
⇒ | If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the door module. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
• | Control Module References for DDM or PDM replacement, setup, and programming |