Pinpoint Test A: The Mirrors Are Inoperative

Rear View Mirrors - Exterior

Pinpoint Test A: The Mirrors are Inoperative

Refer to Wiring Diagram Set 124, Power Mirrors for schematic and connector information [1][2]Diagrams By Number.

Normal Operation

The exterior mirror control switch receives power from the Smart Junction Box (SJB) through circuit SBP12(GN/RD) and ground through circuit GD133(BK). The exterior mirror control switch uses circuit CPM23(GY) as the common circuit for both exterior mirror up/down and right/left movement.

This pinpoint test is intended to diagnose the following:

- Fuse

- Wiring, terminals or connectors

- Exterior mirror control switch

PINPOINT TEST A : THE MIRRORS ARE INOPERATIVE

A1 CHECK FOR VOLTAGE TO EXTERIOR MIRROR CONTROL SWITCH

- Ignition OFF.

- Disconnect: Exterior Mirror Control Switch C527.

- Ignition ON.

- Measure the voltage between exterior mirror control switch C527-3, circuit SBP12 (GN/RD), harness side and ground.





Is the voltage greater than 10 volts?

Yes
GO to A2.

No
VERIFY that SJB (Smart Junction Box) fuse 12 (7.5A) is OK. If OK, REPAIR the circuit. If not OK, REFER to the Wiring Diagrams to identify the possible causes of the circuit short [1][2]Diagrams By Number. TEST the system for normal operation.

A2 CHECK FOR GROUND TO EXTERIOR MIRROR CONTROL SWITCH

- Ignition OFF.

- Measure the resistance between exterior mirror control switch C527-1, circuit GD133 (BK), harness side and ground.





Is the resistance less than 5 ohms?

Yes
GO to A3.

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

A3 CHECK COMMON CIRCUIT FOR A SHORT TO VOLTAGE

- Ignition ON.

- Measure the voltage between exterior mirror control switch C527-6, circuit CPM23 (GY), harness side and ground.





Is any voltage present?

Yes
REPAIR the circuit. TEST the system for normal operation.

No
GO to A4.

A4 CHECK COMMON CIRCUIT FOR AN OPEN OR A SHORT TO GROUND

- Ignition OFF.

- Disconnect: LH Exterior Mirror C516.

- Measure the resistance between exterior mirror control switch C527-6, circuit CPM23 (GY), harness side and ground; and between exterior mirror control switch C527-6, circuit CPM23 (GY), harness side and LH exterior mirror C516-2, circuit CPM23 (GY), harness side.





Is the resistance greater than 10,000 ohms between the exterior mirror control switch connector and ground and less than 5 ohms between the exterior mirror control switch connector and the exterior mirror connector?

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.