Pinpoint Test A: The Mirrors are Inoperative - Non-Memory Mirrors

Rear View Mirrors - Exterior

Pinpoint Tests

Pinpoint Test A: The Mirrors are Inoperative - Non-Memory Mirrors

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 12 (7.5A) through circuit SBP12 (GN/RD) and ground through circuit GD179 (BK/VT). 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 - 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.

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A1 CHECK FOR POWER TO THE EXTERIOR MIRROR CONTROL SWITCH - CIRCUIT SBP12 (GN/RD)


- Disconnect: Exterior Mirror Control Switch C527.
- Measure the voltage between exterior mirror control switch C527-1, circuit SBP12 (GN/RD), harness side and ground.




- Is the voltage greater than 10 volts?

Yes
GO to A2.

No
VERIFY that SJB fuse 12 (7.5A) is OK. If OK, REPAIR the circuit. 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 GD179 (BK/VT) FOR AN OPEN


- Measure the resistance between exterior mirror control switch C527-3, circuit GD179 (BK/VT), 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 C521 .
- Measure the resistance between LH exterior mirror C521-10, circuit CPM23 (GY), harness side and exterior mirror control switch C527-6, 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 the system for normal operation.

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