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Diagnosis and Testing|Removal and Installation > < Rear View Mirrors

Focus RS 2003 (09.2002-)

Rear View Mirrors - Rear View Mirrors Focus RS 2003 (09/2002-)
Diagnosis and Testing

Refer to Wiring Diagrams Section 501-09, for schematic and connector information.

Inspection and Verification

  1. Verify the customer concern.
  1. Visually inspect for obvious signs of mechanical or electrical damage.

Visual Inspection Chart

Mechanical Electrical
  • Damaged mirror(s)
  • Damaged switch
  • Fuse(s)
  • Relay
  • Damaged wiring harness
  • Loose or corroded connectors
  • Mirror motor
  • Switch
  1. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
  1. If the cause is not visually evident, verify the symptom and refer to the Symptom Chart.

Symptom Chart

Symptom Chart

Symptom Possible Sources Action
The mirrors are inoperative
*
Exterior mirror control switch.
*
CARRY OUT the Exterior Mirror Control Switch Component Test. REFER to the Wiring Diagrams.
*
Circuit(s).
*
GO to Pinpoint Test A.
A single mirror is inoperative
*
Exterior mirror control switch.
*
CARRY OUT the Exterior Mirror Control Switch Component Test. REFER to the Wiring Diagrams.
*
Circuit(s).
*
Exterior mirror motor(s).
*
GO to Pinpoint Test B.
A single mirror does not function with switch logic
*
Exterior mirror control switch.
*
CARRY OUT the Exterior Mirror Control Switch Component Test. REFER to the Wiring Diagrams.
*
Circuit(s).
*
Exterior mirror motor(s).
*
GO to Pinpoint Test C.
The heated exterior mirror does not defrost
*
Heated rear window control switch.
*
CARRY OUT the Heated Rear Window Control Switch Component Test. REFER to the Wiring Diagrams.
*
Relay.
*
Circuit(s).
*
Heated mirror element(s).
*
GO to Pinpoint Test D.

Pinpoint Tests

PINPOINT TEST A : THE MIRRORS ARE INOPERATIVE
TEST CONDITIONS DETAILS/RESULTS/ACTIONS
A1: CHECK THE INTERIOR LIGHT DELAY FUNCTION.
1
CHECK the interior light delay function.

Does the interior light delay function operate correctly?
Yes
GO to A2.
No
CHECK the Generic Electronic Module (GEM) operation. REFER to Section  419-10 Multifunction Electronic Modules.
A2: CHECK THE VOLTAGE TO THE EXTERIOR MIRROR CONTROL SWITCH CIRCUIT
NOTE:
NOTE:The circuit numbers and wiring colors change at C51
1
Disconnect Exterior Mirror Control Switch C741.
2
Ignition switch in position II.

3
Measure the voltage between the exterior mirror control switch C741 pin 6, circuit 29-AD12 (OG/YE), harness side and ground.

Is the voltage greater than 10 volts?
Yes
GO to A3.
No
REPAIR circuit 29-AD12 (OG/YE). TEST the system for normal operation.
A3: CHECK THE EXTERIOR MIRROR CONTROL SWITCH GROUND CIRCUIT FOR CONTINUITY
NOTE:
NOTE:The circuit number changes at soldered joint S197
1
Ignition switch in position 0.

2
Measure the resistance between the exterior mirror control switch C741 pin 4, circuit 31-AD12 (BK), harness side and ground.

Is the resistance less than 5 ohms?
Yes
GO to A4.
No
REPAIR circuit 31-AD12 (BK). TEST the system for normal operation.
A4: CHECK CIRCUIT 32-AD1 (WH/RD) FOR CONTINUITY
NOTE:
NOTE:The circuit number and wiring colors change at splice S200
1
Disconnect Driver Exterior Mirror C807.

2
Measure the resistance between the exterior mirror control switch C741 pin 3, circuit 32-AD1 (WH/RD), harness side and the driver exterior mirror C807 pin 1, circuit 32-AD6 (WH), harness side.

Is the resistance less than 5 ohms?
Yes
VERIFY the customer concern.
No
REPAIR circuit 32-AD1 (WH/RD). TEST the system for normal operation.

PINPOINT TEST B : A SINGLE MIRROR IS INOPERATIVE
TEST CONDITIONS DETAILS/RESULTS/ACTIONS
B1: CHECK FOR CONTINUITY BETWEEN THE EXTERIOR MIRROR CONTROL SWITCH AND THE INOPERATIVE EXTERIOR MIRROR
NOTE:
NOTE:The circuit numbers and wiring colors change at splice S200.
1
Disconnect Inoperative Exterior Mirror C807 or C808.

2
Measure the resistance between the exterior mirror control switch C741 pin 3, circuit 32-AD1 (WH/RD), harness side and the inoperative exterior mirror:
  • Driver exterior mirror C807 pin 1, circuit 32-AD6 (WH), harness side.
  • Passenger exterior mirror C808 pin 1, circuit 32-AD9 (WH/GN), harness side.

Is the resistance less than 5 ohms?
Yes
INSTALL a new exterior mirror. TEST the system for normal operation.
No
REPAIR circuit 32-AD6 (WH) or circuit 32-AD9 (WH/GN). TEST the system for normal operation.

PINPOINT TEST C : A SINGLE MIRROR DOES NOT FUNCTION WITH SWITCH LOGIC
TEST CONDITIONS DETAILS/RESULTS/ACTIONS
C1: CHECK THE EXTERIOR MIRROR FUNCTIONS WITH SWITCH LOGIC
1
Ignition switch in position II.
2
OPERATE the exterior mirror control switch.

Does the exterior mirror function with switch logic?
Yes
VERIFY the customer concern.
No
Driver exterior mirror UP/DOWN inoperative GO to C2. . Driver exterior mirror LEFT/RIGHT inoperative GO to C5. . Passenger exterior mirror UP/DOWN inoperative GO to C8. . Passenger exterior mirror LEFT/RIGHT inoperative GO to C11. .
C2: CHECK THE DRIVER EXTERIOR MIRROR UP/DOWN CIRCUIT
NOTE:
NOTE:The circuit numbers and wiring colors change at splice S200.
1
Disconnect Driver Exterior Mirror C807.
2
Ignition switch in position II.
3
OPERATE the exterior mirror control switch to select the driver exterior mirror.

4
Measure the voltage between the driver exterior mirror C807 pin 2, circuit 34-AD7 (BU/RD), harness side and pin 1, circuit 32-AD6 (WH), harness side.
  • OPERATE the exterior mirror control switch UP and DOWN.

Is the voltage greater than 10 volts when the exterior mirror control switch is moved to the UP position and is the polarity reversed when moved to the DOWN position?
Yes
INSTALL a new exterior mirror. TEST the system for normal operation.
No
GO to C3.
C3: CHECK CIRCUIT 34-AD7 (BU/RD) FOR CONTINUITY
1
Ignition switch in position 0.
2
Disconnect Exterior Mirror Control Switch C741.

3
Measure the resistance between the exterior mirror control switch C741 pin 1, circuit 34-AD7 (BU/RD), harness side and the exterior mirror C807 pin 2, circuit 34-AD7 (BU/RD), harness side.

Is the resistance less than 5 ohms?
Yes
GO to C4.
No
REPAIR circuit 34-AD7 (BU/RD). TEST the system for normal operation.
C4: CHECK CIRCUIT 32-AD6 (WH) FOR CONTINUITY

1
Measure the resistance between the exterior mirror control switch C741 pin 3, circuit 32-AD1 (WH/RD), harness side and the exterior mirror C807 pin 1, circuit 32-AD6 (WH), harness side.

Is the resistance less than 5 ohms?
Yes
INSTALL a new exterior mirror. TEST the system for normal operation.
No
REPAIR circuit 32-AD6 (WH). TEST the system for normal operation.
C5: CHECK THE DRIVER EXTERIOR MIRROR LEFT/RIGHT CIRCUIT
NOTE:
NOTE:The circuit numbers and wiring colors change at splice S200
1
Disconnect Driver Exterior Mirror C807.
2
Ignition switch in position II.
3
OPERATE the exterior mirror control switch to select the driver exterior mirror.

4
Measure the voltage between the exterior mirror C807 pin 3, circuit 33-AD8 (YE/BU), harness side and C807 pin 1, circuit 32-AD6 (WH), harness side.
  • OPERATE the exterior mirror control switch LEFT and RIGHT.

Is the voltage greater than 10 volts when the exterior mirror control switch is moved to the LEFT position and is the polarity reversed when moved to the RIGHT position?
Yes
INSTALL a new exterior mirror. TEST the system for normal operation.
No
GO to C6.
C6: CHECK CIRCUIT 33-AD8 (YE/BU) FOR CONTINUITY
1
Ignition switch in position 0.
2
Disconnect Exterior Mirror Control Switch C741.

3
Measure the resistance between the exterior mirror control switch C741 pin 7, circuit 33-AD8 (YE/BU), harness side and the exterior mirror C807 pin 3, circuit 33-AD8 (YE/BU), harness side.

Is the resistance less than 5 ohms?
Yes
GO to C7.
No
REPAIR circuit 33-AD8 (YE/BU). TEST the system for normal operation.
C7: CHECK CIRCUIT 32-AD6 (WH) FOR CONTINUITY

1
Measure the resistance between the exterior mirror control switch C741 pin 3, circuit 32-AD1 (WH/RD), harness side and the mirror C807 pin 1, circuit 32-AD6 (WH), harness side.

Is the resistance less than 5 ohms?
Yes
INSTALL a new exterior mirror. TEST the system for normal operation.
No
REPAIR circuit 32-AD6 (WH). TEST the system for normal operation.
C8: CHECK THE PASSENGER MIRROR UP/DOWN CIRCUIT
NOTE:
NOTE:The circuit numbers and wiring colors change at splice S200.
1
Disconnect Passenger Exterior Mirror C808.
2
Ignition switch in position II.

3
Measure the voltage between the exterior mirror C808 pin 2, circuit 34-AD10 (BU/YE), harness side and C808 pin 1, circuit 32-AD9 (WH/GN), harness side.
  • OPERATE the exterior mirror control switch UP and DOWN.

Is the voltage greater than 10 volts when the exterior mirror control switch is moved to the UP position and is the polarity reversed when moved to the DOWN position?
Yes
INSTALL a new exterior mirror. TEST the system for normal operation.
No
GO to C9.
C9: CHECK CIRCUIT 34-AD10 (BU/YE) FOR CONTINUITY
1
Ignition switch in position 0.
2
Disconnect Exterior Mirror Control Switch C741.

3
Measure the resistance between the exterior mirror control switch C741 pin 2, circuit 34-AD10 (BU/YE), harness side and exterior mirror C808 pin 2, circuit 34-AD10 (BU/YE), harness side.

Is the resistance less than 5 ohms?
Yes
GO to C10.
No
REPAIR circuit 34-AD10 (BU/YE). TEST the system for normal operation.
C10: CHECK CIRCUIT 32-AD9 (WH/GN) FOR CONTINUITY

1
Measure the resistance between the exterior mirror control switch C741 pin 3, circuit 32-AD1 (WH/RD), harness side and the exterior mirror C808 pin 1, circuit 32-AD9 (WH/GN), harness side.

Is the resistance less than 5 ohms?
Yes
INSTALL a new mirror. TEST the system for normal operation.
No
REPAIR circuit 32-AD9 (WH/GN). TEST the system for normal operation.
C11: CHECK THE PASSENGER EXTERIOR MIRROR LEFT/RIGHT CIRCUIT
NOTE:
NOTE:The circuit numbers and wiring colors change at splice S200
1
Disconnect Passenger Mirror C808.
2
Ignition switch in position II.

3
Measure the voltage between the exterior mirror C808 pin 3, circuit 33-AD11 (YE/VT), harness side and C808 pin 1, circuit 32-AD9 (WH/GN), harness side.
  • OPERATE the exterior mirror control switch LEFT and RIGHT.

Is the voltage greater than 10 volts when the exterior mirror control switch is moved to the LEFT position and is the polarity reversed when moved to the RIGHT position.
Yes
INSTALL a new exterior mirror. TEST the system for normal operation.
No
GO to C12.
C12: CHECK CIRCUIT 33-AD11 (YE/VT) FOR CONTINUITY
1
Ignition switch in position 0.
2
Disconnect Exterior Mirror Control Switch C741.

3
Measure the resistance between the exterior mirror control switch C741 pin 5, circuit 33-AD11 (YE/VT), harness side and the exterior mirror C808 pin 3, circuit 33-AD11 (YE/VT), harness side.

Is the resistance less than 5 ohms?
Yes
GO to C13.
No
REPAIR circuit 33-AD11 (YE/VT). TEST the system for normal operation.
C13: CHECK CIRCUIT 32-AD9 (WH/GN) FOR CONTINUITY

1
Measure the resistance between the exterior mirror control switch C741 pin 3, circuit 32-AD1 (WH/RD), harness side and the exterior mirror C808 pin 1, circuit 32-AD9 (WH/GN), harness side.

Is the resistance less than 5 ohms?
Yes
INSTALL a new exterior mirror. TEST the system for normal operation.
No
REPAIR circuit 32-AD9 (WH/RD). TEST the system for normal operation.

PINPOINT TEST D : THE HEATED EXTERIOR MIRROR DOES NOT DEFROST
TEST CONDITIONS DETAILS/RESULTS/ACTIONS
D1: CHECK THE OPERATION OF THE HEATED REAR WINDOW
1
Ignition ON.
2
OPERATE the heated rear window control switch.

Does the heated rear window function correctly?
Yes
GO to D2.
No
REPAIR the heated rear window. REFER to Section  501-11 Glass, Frames and Mechanisms.
D2: CHECK THE VOLTAGE TO THE INOPERATIVE EXTERIOR MIRROR
1
Ignition switch in position 0.
2
Disconnect Inoperative Exterior Mirror C807 or C808.
3
Ignition switch in position II.
4
OPERATIVE the heated rear window control switch.

5
Measure the voltage between the:
  • Driver exterior mirror C807 pin 4, circuit 15S-HB35 (GN/BK), harness side and ground.
  • Passenger exterior mirror C808 pin 4, circuit 15S-HB36 (GN/OG), harness side and ground.

Is the voltage greater than 10 volts?
Yes
GO to D3.
No
REPAIR circuit 15S-HB35 (GN/BK) or circuit 15S-HB36 (GN/OG). TEST the system for normal operation.
D3: CHECK THE INOPERATIVE EXTERIOR MIRROR GROUND CIRCUIT FOR CONTINUITY
1
Ignition switch in position 0.

2
Measure the resistance between:
  • Driver exterior mirror C807 pin 5, circuit 31-HB35 (BK), harness side and ground.
  • Passenger exterior mirror C808 pin 5, circuit 31-HB36 (BK), harness side and ground.

Is the resistance less than 5 ohms?
Yes
INSTALL a new heated exterior mirror glass. TEST the system for normal operation.
No
REPAIR circuit 31-HB35 (BK) or circuit 31-HB36 (BK). TEST the system for normal operation

Diagnosis and Testing|Removal and Installation > < Rear View Mirrors