Pinpoint Test B: A Single Exterior Rear View Mirror is Inoperative

Rear View Mirrors - Exterior

Pinpoint Test B: A Single Exterior Rear View Mirror is Inoperative

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

Normal Operation

Under normal operation, the exterior rear view mirror switch uses a common circuit to control the up/down and right/left movements of both exterior rear view mirrors.

This pinpoint test is intended to diagnose the following:

- Wiring, terminals or connectors

- Exterior rear view mirror switch

- Exterior rear view mirror motor

- Exterior rear view mirror

PINPOINT TEST B : A SINGLE EXTERIOR REAR VIEW MIRROR IS 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.

B1 CHECK THE LH EXTERIOR REAR VIEW MIRROR OPERATION

- Operate the LH exterior rear view mirror using the exterior rear view mirror switch.

Does the LH exterior rear view mirror operate?

Yes
GO to B2.

No
GO to B4.

B2 CHECK THE EXTERIOR REAR VIEW MIRROR SWITCH

- Ignition OFF.

- Disconnect: Exterior Rear View Mirror Switch C527.

- Carry out the exterior rear view mirror switch component test.

Did the exterior mirror control switch pass the component test?

Yes
GO to B3.

No
INSTALL a new exterior rear view mirror switch. REFER to Exterior Mirror Control Switch Service and Repair. TEST the system for normal operation.

B3 CHECK THE EXTERIOR REAR VIEW MIRRORS COMMON CIRCUIT FOR AN OPEN

- Disconnect: RH Exterior Rear View Mirror C601.

- Measure the resistance between exterior rear view mirror switch C527-3, circuit CPM18 (GN/BN), harness side and RH exterior rear view mirror C601-6, circuit CPM18 (GN/BN), harness side.

Is the resistance less than 5 ohms?

Yes
INSTALL a new exterior rear view mirror motor. REFER to Exterior Mirror Motor Service and Repair. TEST the system for normal operation.

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

B4 CHECK THE EXTERIOR REAR VIEW MIRROR SWITCH

- Ignition OFF.

- Disconnect: Exterior Rear View Mirror Switch C527.

- Carry out the Exterior Rear View Mirror Switch component test.

Did the exterior mirror control switch pass the component test?

Yes
GO to B5.

No
INSTALL a new exterior rear view mirror switch. REFER to Exterior Mirror Control Switch Service and Repair. TEST the system for normal operation.

B5 CHECK THE EXTERIOR REAR VIEW MIRRORS COMMON CIRCUIT FOR AN OPEN

- Disconnect: LH Exterior Rear View Mirror Switch C521.

- Measure the resistance between exterior rear view mirror switch C527-3, circuit CPM18 (GN/BN), harness side and LH exterior rear view mirror C521-6, circuit CPM18 (GN/BN), harness side.