• | 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 Right Control | B1605 02 | B1605 04 | B1605 01 | -- |
Driver/Passenger Mirror Right/Down Motors Common | B1544 02 | B1544 04 | B1544 01 | -- |
Driver/Passenger Mirror Motor Down Control | B1600 02 | B1600 04 | B1600 01 | -- |
Low Reference | B1580, B1590 | B1580, B1590 | B1580, B1590 | -- |
The Driver Door Switch (DDS) or Passenger Door Switch (PDS) controls the mirror horizontal and vertical motors through the use of bi-directional motor controls. When the mirror is commanded up, voltage is supplied to the mirror vertical motor through the Driver/Passenger Mirror Motor Right/Down Motors Common circuit and ground is supplied through the Driver/Passenger Mirror Motor Down Control circuit. When the mirror is commanded down, voltage is supplied to the mirror vertical motor through the Driver/Passenger Mirror Motor Down Control circuit and ground is supplied through the Driver/Passenger Mirror Motor Right/Down Motors Common circuit.
Horizontal controls operate in the same manner with the Driver/Passenger Mirror Motor Right/Down Motors Common circuit supplying voltage and the Driver/Passenger Mirror Motor Right Control circuit supply a ground to the mirror horizontal motor when the mirror is commanded right. When the mirror is commanded left, voltage is supplied to the mirror horizontal motor through the Driver/Passenger Mirror Motor Right Control circuit and ground is supplied through the Driver/Passenger Mirror Motor Right/Down Motors Common circuit.
On vehicles equipped with RPO DL3/DR4, the Driver Door Switch (DDS) and Passenger Door Switch (PDS) determines 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 DDS/PDS.
Outside Rearview Mirror Schematics
Outside Mirror Description and Operation
⇒ | If the parameter does not cycle between the specified values, replace the DDS. |
⇒ | If the parameter does not cycle between the specified values, replace the DDS. |
⇒ | If the vehicle is not equipped with RPO DL3/DR4, refer to Mirror Motor Circuit Malfunction |
⇒ | If not within the specified range or the parameter does not change as the mirror is moved, refer to Mirror Position Sensor Circuit Malfunction. |
⇒ | If either mirror does not move in all commanded directions, refer to Mirror Motor Circuit Malfunction. |
• | 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 motor. |
⇒ | 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 motor. |
• | 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 motor. |
⇒ | 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 motor. |
⇒ | 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 motor. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
• | Control Module References for DDS or PDS replacement, setup, and programming |
• | 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. |
The outside rearview mirror switch controls the outside rearview mirrors based on the position of the mirror selector switch and which movement position is selected. The outside rearview mirror switch has four positions: up, down, left, and right. B+ is applied to the switch and when a movement position switch is selected, B+ is sent to the commanded mirror via a mirror control control. The opposite mirror control circuit acts as a ground circuit for the bi-directional mirror motor. Ground is the applied through the switch.
Outside Rearview Mirror Schematics
Outside Mirror Description and Operation
⇒ | If greater than the specified range, test the ground circuit for an open/high resistance. |
⇒ | If the test lamp does not illuminate, test the B+ circuit for an open/high resistance. If the B+ circuit fuse is open, test the B+ circuit and each of the mirror position control circuits for a short to ground. |
⇒ | If greater than the specified range, test the control circuit for an open/high resistance. If the circuit tests normal, test or replace the outside rearview mirror switch. |
⇒ | If greater than the specified range, test the control circuit for an open/high resistance. If the circuit tests normal, test or replace the outside rearview mirror switch. |
⇒ | If greater than the specified range, test the control circuit for an open/high resistance. If the circuit tests normal, test or replace the outside rearview mirror switch. |
⇒ | If greater than the specified range, test the control circuit for an open/high resistance. If the circuit tests normal, test or replace the outside rearview mirror switch. |
⇒ | If the test lamp does not illuminate, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, test or replace the outside rearview mirror switch. |
⇒ | If the test lamp does not illuminate, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, test or replace the outside rearview mirror switch. |
⇒ | If the test lamp does not illuminate, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, test or replace the outside rearview mirror switch. |
⇒ | If the test lamp does not illuminate, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, test or replace the outside rearview mirror switch. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.