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Pinpoint Test A: The Mirrors Are Inoperative




Rear View Mirrors - Exterior

Pinpoint Tests

Pinpoint Test A: The Mirrors are Inoperative

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

Normal Operation

The exterior mirror control switch receives power through circuit 29-AD12 (OG/YE) and ground through circuit 31-AD12 (BK). The exterior mirror control switch uses circuit 32-AD1 (WH/RD) 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

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.

-------------------------------------------------
A1 CHECK FOR VOLTAGE TO THE EXTERIOR MIRROR CONTROL SWITCH


- Ignition OFF.
- Disconnect: Exterior Mirror Control Switch C527.
- Ignition ON.
- Measure the voltage between exterior mirror control switch C527-6, circuit 29-AD12 (OG/YE) harness side and ground.




- Is the voltage greater than 10 volts?

Yes
GO to A2.

No
VERIFY that Central Junction Box (CJB) fuse 131 (5A) is OK. If OK, REPAIR the circuit. TEST the system for normal operation.

-------------------------------------------------
A2 CHECK FOR GROUND TO THE EXTERIOR MIRROR CONTROL SWITCH


- Ignition OFF.
- Measure the resistance between exterior mirror control switch C527-4, circuit 31-AD12 (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 C527-3, circuit 32-AD1 (WH/RD) 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 A SHORT TO GROUND


- Ignition OFF.
- Measure the resistance between exterior mirror control switch C527-3, circuit 32-AD1 (WH/RD) harness side and ground.




- Is the resistance greater than 10,000 ohms?

Yes
GO to A5.

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

-------------------------------------------------
A5 CHECK COMMON CIRCUIT FOR AN OPEN


- Disconnect: LH Exterior Mirror C520.
- Measure the resistance between exterior mirror control switch C527-3, circuit 32-AD1 (WH/RD) harness side and LH exterior mirror C520-1, circuit 32-AD6 (WH) harness side.




- Is the resistance less than 5 ohms?

Yes
INSTALL a new exterior mirror control switch. TEST the system for normal operation.

No
REPAIR the circuit. TEST system for normal operation.

-------------------------------------------------

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