Pinpoint Test A: The Mirrors are Inoperative

Rear View Mirrors

Pinpoint Test

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 voltage from Smart Junction Box (SJB) fuse 30 (5A) through circuit SBP30 (BN/RD) and ground through circuit GD175 (BK/BU). The exterior mirror control switch uses circuit CPM23 (GY) as the common circuit for 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

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A1 CHECK FOR POWER TO THE EXTERIOR MIRROR CONTROL SWITCH - CIRCUIT SBP30 (BN/RD)


- Disconnect: Exterior Mirror Control Switch C527.
- Measure the voltage between exterior mirror control switch C527-3, circuit SBP30 (BN/RD), harness side and ground.




- Is the voltage greater than 10 volts?

Yes
GO to A2.

No
VERIFY that SJB fuse 30 (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. TEST the system for normal operation. Diagrams By Number

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A2 CHECK CIRCUIT GD175 (BK/BU) FOR AN OPEN


- Ignition OFF.
- Measure the resistance between exterior mirror control switch C527-1, circuit GD175 (BK/BU), 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.

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A3 CHECK CIRCUIT CPM23 (GY) 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.

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A4 CHECK CIRCUIT CPM23 (GY) FOR A SHORT TO GROUND


- Ignition OFF.
- Measure the resistance between exterior mirror control switch C527-6, circuit CPM23 (GY), 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.

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A5 CHECK CIRCUIT CPM23 (GY) FOR AN OPEN


- Disconnect: LH Exterior Mirror C522 .
- Measure the resistance between exterior mirror control switch C527-6, circuit CPM23 (GY), harness side and LH exterior mirror C522-2, circuit CPM23 (GY), harness side.




- Is the resistance less than 5 ohms?

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

No
REPAIR the circuit. TEST system for normal operation.

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