501-09 Rear View Mirrors 2014 Fiesta
Diagnosis and Testing Procedure revision date: 04/29/2013

Rear View Mirrors

Symptom Chart(s)

Symptom Chart: Rear View Mirrors - Exterior, Power


Condition Possible Sources Actions
Mirrors fold inward due to wind pressure Mirror structural bracket is damaged INSPECT the mirror for structural damage. If necessary, INSTALL a new mirror.
REFER to: Exterior Mirror (501-09 Rear View Mirrors, Removal and Installation).
The exterior mirror turn indicator is inoperative or always on
  • Fuse
  • Wiring, terminals or connectors
  • Exterior mirror
 
REFER to: Turn Signal and Hazard Lamps (417-01 Exterior Lighting, Diagnosis and Testing).
Both exterior mirrors are inoperative Refer to the Pinpoint Test   GO to Pinpoint Test A
A single exterior mirror is inoperative Refer to the Pinpoint Test   GO to Pinpoint Test B
A single exterior mirror does not operate in all directions Refer to the Pinpoint Test   GO to Pinpoint Test C


Symptom Chart: Rear View Mirrors - Exterior, Heated


Condition Possible Sources Actions
The heated exterior mirror is inoperative Refer to the Pinpoint Test   GO to Pinpoint Test D


Symptom Chart: Rear View Mirrors - Interior


Condition Possible Sources Actions
The interior mirror is blemished Interior mirror glass/housing is dirty

NOTE: Do not clean the housing or glass of any mirror with harsh abrasives, fuel or other petroleum-based cleaning products.

CLEAN the affected interior mirror surface.
The interior mirror is damaged INSPECT the interior mirror damage. If needed, INSTALL a new interior rear view mirror.
REFER to: Interior Rear View Mirror (501-09 Rear View Mirrors, Removal and Installation).
The interior auto-dimming interior mirror does not operate correctly Refer to the pinpoint test   GO to Pinpoint Test E


Symptom Chart: Noise, Vibration and Harshness (NVH)


Condition Possible Sources Actions
Exterior mirror vibrates/loose Exterior mirror motor screws loose REMOVE mirror glass and TIGHTEN the exterior mirror motor screws.
REFER to: Exterior Mirror (501-09 Rear View Mirrors, Removal and Installation).
Exterior mirror mounting nuts loose TIGHTEN the exterior mirror mounting nuts.
REFER to: Exterior Mirror (501-09 Rear View Mirrors, Removal and Installation).
Exterior mirror glass loose PRESS the center of the exterior mirror glass up, down, left and right to make sure the exterior mirror glass is seated correctly. If the exterior mirror glass is still loose, REMOVE the exterior mirror glass and INSPECT the exterior mirror backing plate for damage. If the exterior mirror backing plate is damaged, INSTALL a new exterior mirror glass.
REFER to: Exterior Mirror (501-09 Rear View Mirrors, Removal and Installation).
Aftermarket air deflector/stone shields If possible, REMOVE aftermarket air deflector/stone shield, then ROAD TEST the vehicle. If the concern is no longer present, ADVISE the customer that aftermarket components were causing undesired vibration.
Wind noise Foam gasket between exterior mirror housing and door is misaligned or damaged VERIFY the gasket is in good condition. If necessary, REPOSITION the foam gasket between exterior rear view mirror housing and door frame or REPAIR the foam gasket as needed. The foam gasket is not serviceable and if it cannot be repaired, INSTALL a new exterior mirror.
REFER to: Exterior Mirror (501-09 Rear View Mirrors, Removal and Installation).
Exterior mirror is not correctly fitted to the door VERIFY there are no gaps between the exterior mirror and the door. If necessary, LOOSEN the exterior mirror nuts and REPOSITION the exterior mirror as necessary.
Exterior mirror cover VERIFY the exterior mirror cover is not loose or broken. If necessary, INSTALL a new exterior mirror cover.
REFER to: Exterior Mirror (501-09 Rear View Mirrors, Removal and Installation).
The interior mirror vibrates/loose Interior mirror mounting loose If the mirror is still on the windshield, do not remove . ATTEMPT to fully seat the mirror first. If the mirror is still loose or vibrates, REMOVE and REINSTALL the mirror. If the condition still exists, INSTALL a new interior mirror.
REFER to: Interior Rear View Mirror (501-09 Rear View Mirrors, Removal and Installation).


Pinpoint Tests

Both Exterior Mirrors Are Inoperative


Refer to Wiring Diagrams Cell 124 for schematic and connector information.

Normal Operation and Fault Conditions

CJB fuse 16 (5A) supplies voltage to the exterior mirror control switch at all times. The exterior mirror control switch supplies voltage and ground to the exterior mirror motors based on switch inputs.

Possible Sources

Visual Inspection and Diagnostic Pre-Checks

Inspect CJB fuse 16 (5A).


PINPOINT TEST A : BOTH EXTERIOR MIRRORS ARE INOPERATIVE
A1   CHECK FOR VOLTAGE TO THE MASTER WINDOW CONTROL SWITCH
  • Ignition OFF.
  • Disconnect Exterior Mirror Control Switch C577 .
  • Measure:


    Positive Lead Measurement / Action Negative Lead
      C577-6   Ground



Is the voltage greater than 11 volts?

Yes GO to A2
No VERIFY that CJB fuse 16 (5A) is OK. If OK, REPAIR the circuit. If not OK, REFER to the Wiring Diagrams Manual to identify the possible causes of the circuit short.


A2   CHECK FOR GROUND AT THE MASTER WINDOW CONTROL SWITCH
  • Measure:


    Positive Lead Measurement / Action Negative Lead
      C577-4   Ground



Is the resistance less than 3 ohms?

Yes GO to A3
No REPAIR the circuit.


A3   CHECK THE EXTERIOR REAR VIEW MIRROR COMMON CIRCUIT FOR AN OPEN
  • Disconnect LH Exterior Mirror C521 .
  • Measure:


    Positive Lead Measurement / Action Negative Lead
      C577-3   C521-6



Is the resistance less than 3 ohms?

Yes INSTALL a new exterior mirror control switch.
No REPAIR the circuit.



A Single Exterior Mirror Is Inoperative


Refer to Wiring Diagrams Cell 124 for schematic and connector information.

Normal Operation and Fault Conditions

The LH and RH exterior mirrors share a common circuit that is used for up/down and left/right movement. See Rear View Mirrors - Exterior, Power
REFER to: Rear View Mirrors - System Operation and Component Description (501-09 Rear View Mirrors, Description and Operation).

Possible Sources


PINPOINT TEST B : A SINGLE EXTERIOR MIRROR IS INOPERATIVE
B1   CHECK THE EXTERIOR MIRROR CONTROL SWITCH
  • Ignition OFF.
  • Disconnect Exterior Mirror Control Switch C577 .
  • Perform the exterior rear view mirror switch component test.
    Refer to Wiring Diagrams Cell 149 for schematic and connector information.

Does the exterior mirror control switch pass the component test?

Yes GO to B2
No INSTALL a new exterior mirror control switch.


B2   CHECK THE EXTERIOR MIRROR COMMON CIRCUIT FOR AN OPEN AT THE EXTERIOR MIRROR
  • Disconnect Inoperative Exterior Mirror C521 or C626 .
  • Measure:

      LH Exterior Mirror


    Positive Lead Measurement / Action Negative Lead
      C577-3   C521-6




      RH Exterior Mirror


    Positive Lead Measurement / Action Negative Lead
      C577-3   C626-6



Is the resistance less than 3 ohms?

Yes CHECK the inoperative 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 exterior mirror.
REFER to: Exterior Mirror (501-09 Rear View Mirrors, Removal and Installation).
If the jumper harness is OK, INSTALL a new exterior mirror motor. REFER to: Exterior Mirror (501-09 Rear View Mirrors, Removal and Installation).
No REPAIR the circuit.



A Single Exterior Mirror Does Not Operate In All Directions


Refer to Wiring Diagrams Cell 124 for schematic and connector information.

Normal Operation and Fault Conditions

The exterior mirror control switch supplies voltage and ground to the LH and RH exterior mirrors to control movement. Each mirror contains a horizontal and a vertical motor. The exterior rear view mirror switch controls movement by reversing polarity of the voltage and ground circuits being supplied to each motor. See Rear View Mirrors - Exterior, Power
REFER to: Rear View Mirrors - System Operation and Component Description (501-09 Rear View Mirrors, Description and Operation).

Possible Sources


PINPOINT TEST C : A SINGLE MIRROR DOES NOT OPERATE IN ALL DIRECTIONS
C1   CHECK THE EXTERIOR MIRROR MOVEMENT
  • Operate the LH and RH exterior mirror in the left, right, up and down directions using the exterior mirror control switch.

Do the exterior mirrors move corresponding to the exterior mirror control switch?

Yes The system is operating correctly at this time. INSPECT the system for loose or corroded connectors.
No GO to C2


C2   CHECK THE EXTERIOR MIRROR CONTROL SWITCH
  • Ignition OFF.
  • Disconnect Exterior Mirror Control Switch C577 .
  • Perform the exterior rear view mirror switch component test.
    Refer to Wiring Diagrams Cell 149 for schematic and connector information.

Does the exterior mirror control switch pass the component test?

Yes GO to C3
No INSTALL a new exterior mirror control switch.


C3   CHECK THE EXTERIOR MIRROR CONTROL CIRCUITS FOR A SHORT TO VOLTAGE
  • Disconnect Inoperative Exterior Mirror C521 or C626 .
  • Ignition ON.
  • Measure:

      LH Exterior Mirror


    Positive Lead Measurement / Action Negative Lead
      C577-1   Ground
      C577-3   Ground
      C577-7   Ground




      RH Exterior Mirror


    Positive Lead Measurement / Action Negative Lead
      C577-2   Ground
      C577-5   Ground
      C577-3   Ground



Is any voltage present?

Yes REPAIR the affected circuit.
No GO to C4


C4   CHECK THE EXTERIOR MIRROR CONTROL CIRCUITS FOR AN OPEN
  • Ignition OFF.
  • Measure:

      LH Exterior Mirror


    Positive Lead Measurement / Action Negative Lead
      C577-1   C521-7
      C577-3   C521-6
      C577-7   C521-5




      RH Exterior Mirror


    Positive Lead Measurement / Action Negative Lead
      C577-2   C626-5
      C577-3   C626-6
      C577-5   C626-7



Are the resistances less than 3 ohms?

Yes GO to C5
No REPAIR the affected circuit.


C5   CHECK THE EXTERIOR MIRROR CONTROL CIRCUITS FOR A SHORT TOGETHER
  • Measure:

      LH Exterior Mirror


    Positive Lead Measurement / Action Negative Lead
      C521-6   C521-7
      C521-5   C521-7
      C521-5   C521-6




      RH Exterior Mirror


    Positive Lead Measurement / Action Negative Lead
      C626-6   C626-5
      C626-6   C626-7
      C626-5   C626-7



Are the resistances greater than 10,000 ohms?

Yes CHECK the inoperative 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 exterior mirror.
REFER to: Exterior Mirror (501-09 Rear View Mirrors, Removal and Installation).
If the jumper harness is OK, INSTALL a new exterior mirror motor. REFER to: Exterior Mirror (501-09 Rear View Mirrors, Removal and Installation).
No REPAIR the affected circuit.



The Heated Exterior Mirror Is Inoperative


Refer to Wiring Diagrams Cell 56 for schematic and connector information.

Refer to Wiring Diagrams Cell 124 for schematic and connector information.

Normal Operation and Fault Conditions

See Rear View Mirrors - Exterior, Heated
REFER to: Rear View Mirrors - System Operation and Component Description (501-09 Rear View Mirrors, Description and Operation).

Possible Sources

Visual Inspection and Diagnostic Pre-Checks


PINPOINT TEST D : THE HEATED EXTERIOR MIRROR IS INOPERATIVE
D1   CHECK THE OPERATION OF THE REAR WINDOW DEFROST SYSTEM
  • Start the engine.
  • With the engine running, activate the rear window defrost.
  • Using an infrared temperature gun or equivalent, measure the temperature of the rear window glass for approximately 30 seconds, noting changes in temperature.

Does the temperature of the rear window glass rise?

Yes GO to D2
No DIAGNOSE the rear window defrost system.
REFER to: Glass, Frames and Mechanisms - Vehicles With: Front Manual Windows (501-11 Glass, Frames and Mechanisms, Diagnosis and Testing).


D2   CHECK THE OPERATION OF THE HEATED EXTERIOR MIRRORS
  • With the rear window defrost ON, using an infrared temperature gun or equivalent, measure the temperature of the LH and RH exterior mirror glass for approximately 30 seconds, noting changes in temperature.

Does at least one heated mirror operate correctly?

Yes GO to D3
No VERIFY that CJB fuse 25 (7.5A) is OK. If OK, REPAIR circuit CBP25 (WH/OG). If not OK, REFER to the Wiring Diagrams manual to identify the possible causes of the circuit short.


D3   CHECK THE VOLTAGE TO THE HEATED EXTERIOR MIRROR
  • Ignition OFF.
  • Disconnect Inoperative Exterior Mirror C521 or C626 .
  • Start the engine.
  • With the engine running, activate the rear window defrost.
  • Measure:

      LH Exterior Mirror


    Positive Lead Measurement / Action Negative Lead
      C521-1   Ground




      RH Exterior Mirror


    Positive Lead Measurement / Action Negative Lead
      C626-1   Ground



Is the voltage greater than 11 volts?

Yes GO to D4
No REPAIR the circuit.


D4   CHECK THE EXTERIOR MIRROR GROUND CIRCUIT FOR AN OPEN
  • Ignition OFF.
  • Measure:

      LH Exterior Mirror


    Positive Lead Measurement / Action Negative Lead
      C521-2   Ground




      RH Exterior Mirror


    Positive Lead Measurement / Action Negative Lead
      C626-2   Ground



Is the resistance less than 3 ohms?

Yes CHECK the exterior mirror jumper harness between the vehicle harness and the exterior mirror glass for shorted 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 exterior mirror.
REFER to: Exterior Mirror (501-09 Rear View Mirrors, Removal and Installation).
If the jumper harness is OK, INSTALL a new exterior mirror glass. REFER to: Exterior Mirror (501-09 Rear View Mirrors, Removal and Installation).
No REPAIR the circuit.



The Interior Auto-Dimming Mirror Does Not Operate Correctly


Refer to Wiring Diagrams Cell 124 for schematic and connector information.

Normal Operation and Fault Conditions

See Rear View Mirrors - Interior, Auto-Dimming
REFER to: Rear View Mirrors - System Operation and Component Description (501-09 Rear View Mirrors, Description and Operation).

Possible Sources


PINPOINT TEST E : THE INTERIOR AUTO-DIMMING MIRROR DOES NOT OPERATE CORRECTLY
E1   CHECK THE OPERATION OF THE REVERSING LAMPS
  • Ignition ON.
  • While observing the reversing lamps, move the gear selector lever through the entire range.

Do the reversing lamps illuminate only when the selector lever is in reverse ?

Yes GO to E2
No DIAGNOSE the reversing lamps.
REFER to: Reversing Lamps (417-01 Exterior Lighting, Diagnosis and Testing).


E2   INSPECT THE INTERIOR AUTO-DIMMING MIRROR FOR PROPER INSTALLATION
  • Inspect the interior auto-dimming mirror to make sure the rearward facing sensor is at the top of the mirror glass.

Is the rearward facing sensor at the top of the interior auto-dimming mirror glass?

Yes GO to E3
No INSTALL the interior auto-dimming mirror with the rearward facing sensor at the top of the mirror glass.
REFER to: Interior Rear View Mirror (501-09 Rear View Mirrors, Removal and Installation).


E3   VERIFY THE FORWARD AND REARWARD FACING SENSORS ARE NOT BLOCKED
  • Inspect the auto-dimming interior mirror to verify the forward and rearward facing sensors are not blocked. Sources of blockage can include:
    • stickers, window decals or tags
    • fold-down screens for TVs or DVD players
    • non-OEM window tinting
    • dirt or debris

Are either of the sensors blocked?

Yes If possible, REMOVE the obstruction. If it is not possible to remove the obstruction, ADVISE the customer the blockage will affect the operation of the interior auto-dimming mirror.
No GO to E4


E4   CHECK THE OPERATION OF THE INTERIOR AUTO-DIMMING MIRROR - DAYLIGHT CONDITIONS
  • Ignition ON.
  • Select PARK.
  • Use a bright lamp to illuminate the forward facing sensor. The mirror should adjust to a high reflectance mode (mirror will be clear).

Does the mirror adjust to a high reflectance (clear) state?

Yes GO to E5
No INSTALL a new interior auto-dimming mirror.
REFER to: Interior Rear View Mirror (501-09 Rear View Mirrors, Removal and Installation).


E5   CHECK THE OPERATION OF THE INTERIOR AUTO-DIMMING MIRROR - NIGHTTIME CONDITIONS WITH GLARE
  • Select PARK.
  • Simulate nighttime conditions with glare:
    • Cover the forward facing sensor with black electrical tape or other dark material (covering the sensor with a finger or hand is not adequate).
    • Illuminate the rearward facing sensor. The mirror glass should darken to a lower reflectance mode.

Does the mirror adjust to a low reflectance (dark) state?

Yes GO to E6
No GO to E8


E6   CHECK THE OPERATION OF THE INTERIOR AUTO-DIMMING MIRROR - NIGHTTIME CONDITIONS WITHOUT GLARE
  • Simulate nighttime conditions without glare:
    • Cover the forward and rearward facing sensors with black electrical tape or other dark material (covering the sensors with a finger or hand is not adequate).

Does the mirror adjust to a high reflectance (clear) state?

Yes GO to E7
No GO to E8


E7   CHECK THE OPERATION OF THE INTERIOR AUTO-DIMMING MIRROR - NIGHTTIME CONDITIONS WITH GLARE AND THE VEHICLE IN REVERSE
  • Simulate nighttime conditions with glare:
    • Cover the forward facing sensor with black electrical tape or other dark material (covering the sensor with a finger or hand is not adequate).
    • Illuminate the rearward facing sensor. The mirror glass should darken to a lower reflectance mode.
  • Select REVERSE.

Does the mirror adjust to a high reflectance (clear) state after reverse was selected?

Yes The system is operating normally at this time. REVIEW the operation of the interior auto-dimming mirror with the customer.
No GO to E8


E8   CHECK FOR VOLTAGE TO THE INTERIOR AUTO-DIMMING MIRROR
  • Ignition OFF.
  • Disconnect Interior Auto-Dimming Mirror C911 .
  • Ignition ON.
  • Measure:


    Positive Lead Measurement / Action Negative Lead
      C911-1   Ground



Is the voltage greater than 11 volts?

Yes GO to E9
No VERIFY that CJB fuse 2 (7.5A) is OK. If OK, REPAIR the circuit. If not OK, REFER to the Wiring Diagrams Manual to identify the possible causes of the circuit short.


E9   CHECK FOR GROUND TO THE INTERIOR AUTO-DIMMING MIRROR
  • Ignition OFF.
  • Measure:


    Positive Lead Measurement / Action Negative Lead
      C911-4   Ground



Is the resistance less than 3 ohms?

Yes GO to E10
No REPAIR the circuit.


E10   CHECK FOR VOLTAGE TO THE INTERIOR AUTO-DIMMING MIRROR REVERSE CIRCUIT
  • Ignition ON.
  • Select REVERSE.
  • Measure:


    Positive Lead Measurement / Action Negative Lead
      C911-9   Ground



Is the voltage greater than 11 volts?

Yes INSTALL a new interior auto-dimming mirror.
REFER to: Interior Rear View Mirror (501-09 Rear View Mirrors, Removal and Installation).
No REPAIR the circuit.





Copyright © Ford Motor Company