• | 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 |
---|---|---|---|---|
5-Volt Reference | B1580, B1590 | B1580, B1590 | B1580, B1590 | -- |
Driver/Passenger Mirror Horizontal Position Sensor Signal | B1580 | B1580 | B1580 | -- |
Driver/Passenger Mirror Vertical Position Sensor Signal | B1590 | B1590 | B1590 | -- |
Driver/Passenger Mirror Motor Horizontal Control | B1605 02 | B1605 04 | B1605 01 | -- |
Driver/Passenger Mirror Motors Common Control | B1544 02 | B1544 04 | B1544 01 | -- |
Driver/Passenger Mirror Motor Vertical Control | B1600 02 | B1600 04 | B1600 01 | -- |
Low Reference | B1580, B1590 | B1580, B1590 | B1580, B1590 | -- |
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 vertical 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 horizontal 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 Driver Door Module (DDM) and Passenger Door Module (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. Five 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. |
• | Control circuit terminal 1 |
• | Control circuit terminal 2 |
• | Control circuit terminal 6 |
⇒ | If the test lamp illuminates, test the appropriate control circuit for a short to voltage. |
• | Control circuit terminal 1 |
• | Control circuit terminal 2 |
• | Control circuit terminal 6 |
⇒ | If less the specified value, test the appropriate control circuit for a short to ground. |
⇒ | If not within the specified range, test both control circuits for an open/high resistance. If the circuits test normal, test or replace the rearview mirror. |
⇒ | If not within the specified range, test both control circuit for an open/high resistance. If the circuits test normal, test or replace the rearview mirror. |
• | 5-volt reference circuit terminal 7 |
• | Signal circuit terminal 4 |
• | Signal circuit terminal 5 |
• | Low reference circuit terminal 10 |
⇒ | If the test lamp illuminates, test the appropriate circuit for a short to voltage. |
• | 5-volt reference circuit terminal 7 |
• | Signal circuit terminal 4 |
• | Signal circuit terminal 5 |
• | Low reference circuit terminal 10 |
⇒ | If less than the specified value, test the appropriate circuit for a short to ground. |
⇒ | If not within the specified range, test the 5-volt reference circuit and the low reference circuit for an open/high resistance. If the circuits test normal, test or replace the rearview mirror. |
⇒ | If not within the specified range, test the signal circuit for an open/high resistance. If the circuits test normal, test or replace the rearview mirror. |
⇒ | If not within the specified range, test the signal circuit for an open/high resistance. If the circuits test normal, test or replace the rearview mirror. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
• | Control Module References for DDM or PDM replacement, setup, and programming |