Pinpoint Test C: A Single Mirror Does Not Function With Switch Logic - Non-Memory Mirrors

Rear View Mirrors - Exterior

Pinpoint Test C: A Single Mirror Does Not Function With Switch Logic - Non-Memory Mirrors

Refer to Wiring Diagram Set 124, Power Mirrors for schematic and connector information Electrical Diagrams.

Normal Operation

Under normal operation, the exterior mirror control switch supplies voltage and ground to control LH and RH exterior mirror motor movement. Each mirror contains a horizontal and vertical motor. The exterior mirror control switch controls movement by reversing polarity of the voltage and ground circuits being supplied to each motor.

This pinpoint test is intended to diagnose the following:

- Wiring, terminals or connectors

- Exterior mirror control switch

- Exterior mirror motor

- Exterior mirror

PINPOINT TEST C : A SINGLE MIRROR DOES NOT FUNCTION WITH SWITCH LOGIC - NON-MEMORY MIRRORS

NOTICE: Use the correct probe adapter(s) from the Flex Probe Kit when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

C1 CHECK THE MIRROR MOVEMENT (LEFT/RIGHT)

- Operate the LH and RH exterior mirrors in the left and right direction using the exterior mirror control switch.

Do both exterior mirrors move left and right?

Yes
GO to C2.

No
GO to C3.

C2 CHECK THE MIRROR MOVEMENT (UP/DOWN)

- Operate the LH and RH exterior mirrors in the up and down direction using the exterior mirror control switch.

Do both exterior mirrors move up and down?

Yes
The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector. TEST the system for normal operation.

No
GO to C4.

C3 CHECK THE VOLTAGE TO THE INOPERATIVE MIRROR

- Disconnect: Inoperative Exterior Mirror C516 (LH) or C622 (RH).

- NOTE: Position the exterior mirror control switch to the direction of the inoperative mirror.

While operating the exterior mirror control switch in the LH direction, measure the voltage between ground and:
- LH exterior mirror:C516-3, circuit CPM16 (BN/BU), harness side.

- RH exterior mirror:C622-3, circuit CPM20 (BN/WH), harness side.

Is the voltage greater than 10 volts?

Yes
CHECK the inoperative exterior mirror jumper harness between the vehicle harness and the exterior mirror motor for open circuits and damaged or pushed-out pins. If the jumper harness is not OK, REPAIR the jumper harness. If the jumper harness cannot be repaired, INSTALL a new exterior mirror. REFER to Exterior Mirror . If the jumper harness is OK, INSTALL a new exterior mirror motor. REFER to Exterior Mirror Motor . TEST the system for normal operation.

No
GO to C5.

C4 CHECK THE VOLTAGE TO THE INOPERATIVE MIRROR

- Disconnect: Inoperative Exterior Mirror C516 (LH) or C622 (RH).

- NOTE: Position the exterior mirror control switch to the direction of the inoperative mirror.

While operating the exterior mirror control switch in the upward direction, measure the voltage between ground and:
- LH exterior mirror:C516-2, circuit CPM17 (BU/GN), harness side.

- RH exterior mirror:C622-2, circuit CPM21 (YE/VT), harness side.

Is the voltage greater than 10 volts?

Yes
CHECK the inoperative exterior mirror jumper harness between the vehicle harness and the exterior mirror motor for open circuits and damaged or pushed-out pins. If the jumper harness is not OK, REPAIR the jumper harness. If the jumper harness cannot be repaired, INSTALL a new exterior mirror. REFER to Exterior Mirror . If the jumper harness is OK, INSTALL a new exterior mirror motor. REFER to Exterior Mirror Motor . TEST the system for normal operation.

No
GO to C6.

C5 CHECK THE MIRROR CONTROL CIRCUITS FOR AN OPEN

- Disconnect: Exterior Mirror Control Switch C527.

- LH exterior mirror: Measure the resistance between exterior mirror control switch C527-8, circuit CPM16 (BN/BU), harness side and LH exterior mirror C516-3, circuit CPM16 (BN/BU), harness side.

- RH exterior mirror: Measure the resistance between exterior mirror control switch C527-7, circuit CPM20 (BN/WH), harness side and RH exterior mirror C622-3, circuit CPM20 (BN/WH), harness side.

Is the resistance less than 5 ohms?

Yes
INSTALL a new exterior mirror control switch. REFER to Exterior Mirror Control Switch . TEST the system for normal operation.

No
REPAIR the circuit. TEST the system for normal operation.

C6 CHECK THE MIRROR CONTROL CIRCUITS FOR AN OPEN

- Ignition OFF.

- Disconnect: Exterior Mirror Control Switch C527.

- LH exterior mirror: Measure the resistance between exterior mirror control switch C527-5, circuit CPM17 (BU/GN), harness side and LH exterior mirror C516-2, circuit CPM17 (BU/GN), harness side.

- RH exterior mirror: Measure the resistance between exterior mirror control switch C527-2, circuit CPM21 (YE/VT), harness side and RH exterior mirror C622-2, circuit CPM21 (YE/VT), harness side.