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
Under normal operation, the exterior mirror control switch uses circuit 945 (YE/BK) as the 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
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B1 CHECK THE LH MIRROR OPERATION
- Operate the LH exterior mirror using the exterior mirror control switch.
- 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
- 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 CIRCUIT 945 (YE/BK) FOR AN OPEN
- Ignition OFF.
- Disconnect: RH Exterior Mirror C622.
- Measure the resistance between exterior mirror control switch C527-6, circuit 945 (YE/BK), harness side and RH exterior mirror C622-2, circuit 945 (YE/BK), the 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, INSTALL a new RH exterior mirror. REFER to Exterior Mirror Exterior Mirror. If the jumper harness is OK, INSTALL a new exterior mirror motor. REFER to Exterior Mirror Motor Service and Repair. 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
- 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 CIRCUIT 945 (YE/BK) FOR AN OPEN
- Ignition OFF.
- Disconnect: LH Exterior Mirror C516 .
- Measure the resistance between exterior mirror control switch C527-6, circuit 945 (YE/BK), harness side and LH exterior mirror C516-2, circuit 945 (YE/BK), 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, INSTALL a new LH exterior mirror. REFER to Exterior Mirror Exterior Mirror. If the jumper harness is OK, INSTALL a new exterior mirror motor. REFER to Exterior Mirror Motor Service and Repair. TEST the system for normal operation.
No
REPAIR the circuit. TEST the system for normal operation.
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