Pinpoint Test B: A Single Mirror Is Inoperative
Rear View Mirrors - Exterior
Pinpoint Tests
Pinpoint Test B: A Single Mirror is Inoperative
Refer to Wiring Diagram Set 124, Power Mirrors for schematic and connector information. Diagrams By Number
Normal Operation
The exterior mirror control switch uses a common circuit for both exterior mirror down/up and left/right movement.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Exterior mirror control switch
- Exterior mirror motor
- Exterior mirror
PINPOINT TEST B: A SINGLE 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) can damage the connector.
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B1 CHECK THE LH EXTERIOR MIRROR OPERATION
- Set the exterior mirror control switch to the LH mirror position.
- Use the exterior mirror control switch to operate the LH exterior mirror.
- Does the LH exterior mirror operate?
Yes
GO to B2.
No
GO to B4.
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B2 CHECK THE EXTERIOR MIRROR CONTROL SWITCH
- Ignition OFF.
- Disconnect: Exterior Mirror Control Switch C527.
- Carry out the Exterior Mirror Control Switch Component Test.
Refer to Power Mirror Switch for component testing.
- Did the exterior mirror control switch pass the component test?
Yes
GO to B3.
No
INSTALL a new exterior mirror control switch. REFER to Exterior Mirror Control Switch Service and Repair. TEST the system for normal operation.
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B3 CHECK THE COMMON CIRCUIT BETWEEN THE EXTERIOR MIRROR CONTROL SWITCH AND THE RH EXTERIOR MIRROR FOR AN OPEN
- Disconnect: RH Exterior Mirror C601.
- Measure the resistance between exterior mirror control switch C527-3, circuit 32-AD1 (WH/RD), harness side and RH exterior mirror C601-1, circuit 32-AD9 (WH/GN), harness side.
- Is the resistance less than 5 ohms?
Yes
CHECK the RH exterior mirror jumper harness between the vehicle harness and the exterior mirror motor for open circuits and damaged or pushed-out pins. If the jumper harness is not OK, REPAIR the jumper harness. If the jumper harness cannot be repaired or is OK, INSTALL a new exterior mirror. REFER to Exterior Mirror Exterior Mirror. TEST the system for normal operation.
No
REPAIR the circuit. TEST the system for normal operation.
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B4 CHECK THE EXTERIOR MIRROR CONTROL SWITCH
- Ignition OFF.
- Disconnect: Exterior Mirror Control Switch C527.
- Carry out the Exterior Mirror Control Switch Component Test.
Refer to Power Mirror Switch for component testing.
- Did the exterior mirror control switch pass the component test?
Yes
GO to B5.
No
INSTALL a new exterior mirror control switch. REFER to Exterior Mirror Control Switch Service and Repair. TEST the system for normal operation.
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B5 CHECK THE COMMON CIRCUIT BETWEEN THE EXTERIOR MIRROR CONTROL SWITCH AND THE LH EXTERIOR MIRROR 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
CHECK the LH exterior mirror jumper harness between the vehicle harness and the exterior mirror motor for open circuits and damaged or pushed-out pins. If the jumper harness is not OK, REPAIR the jumper harness. If the jumper harness cannot be repaired or is OK, INSTALL a new exterior mirror. REFER to Exterior Mirror Exterior Mirror. TEST the system for normal operation.
No
REPAIR the circuit. TEST the system for normal operation.
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