Ford Escape Quiz
Body and Paint

Diagnosis and Testing - Sunroof Panel

In this manual: Body and Paint
General Information — 26Chassis — 160Powertrain — 323Electrical — 356Body and Paint — 290
~26min read

Diagnostic Trouble Code (DTC) Chart

The diagnosis in this manual assumes a certain level of skill and knowledge of Ford-approved diagnostic procedures.
REFER TO: Diagnostic Methods (100-00 General Information, Description and Operation).


Module Trouble Code Description Action
BCM B12F4:12 Vehicle Speed Output: Short to Battery GO to Pinpoint Test A
BCM B12F4:14 Vehicle Speed Output: Short to Ground or Open GO to Pinpoint Test A

Global Customer Symptom Codes (GCSC) Table

The diagnosis in this manual assumes a certain level of skill and knowledge of Ford-approved diagnostic procedures.
REFER TO: Diagnostic Methods (100-00 General Information, Description and Operation).


Symptom Action
Seating/Trim/Body > Body Panels > Sunroof Panel (Non-Glass) > Difficult to Close GO to Pinpoint Test A
Seating/Trim/Body > Body Panels > Sunroof Panel (Non-Glass) > Difficult to Close GO to Pinpoint Test F
Seating/Trim/Body > Body Panels > Sunroof Panel (Non-Glass) > Difficult to Open GO to Pinpoint Test F
Seating/Trim/Body > Body Panels > Sunroof Panel (Non-Glass) > Water Leak GO to Pinpoint Test C
Seating/Trim/Body > Noise > Roof/Sunroof Opening > Always GO to Pinpoint Test E

Symptom Charts

Symptom Chart: Sunroof Panel

The diagnosis in this manual assumes a certain level of skill and knowledge of Ford-approved diagnostic procedures.
REFER TO: Diagnostic Methods (100-00 General Information, Description and Operation).

Condition Action
Sunroof Panel Leaks
  • GO to Pinpoint Test C
Sunroof Panel Does Not Open or Close
  • GO to Pinpoint Test F
One-Touch Open Function Does Not Work
  • GO to Pinpoint Test H
Sunroof Panel Does Not Close While Vehicle Is Moving
  • GO to Pinpoint Test A

Symptom Chart: NVH

The diagnosis in this manual assumes a certain level of skill and knowledge of Ford-approved diagnostic procedures.
REFER TO: Diagnostic Methods (100-00 General Information, Description and Operation).

Condition Action
Sunroof Panel Has Excessive Wind Noise
  • GO to Pinpoint Test B
Sunroof Panel Rattles
  • GO to Pinpoint Test D
Sunroof Panel Makes Noise During Operation
  • GO to Pinpoint Test E

Symptom Chart: Sunshade

The diagnosis in this manual assumes a certain level of skill and knowledge of Ford-approved diagnostic procedures.
REFER TO: Diagnostic Methods (100-00 General Information, Description and Operation).

Condition Action
Sunshade Does Not Open or Close
  • GO to Pinpoint Test G

Pinpoint Tests


PINPOINT TEST A: SUNROOF PANEL DOES NOT CLOSE WHILE VEHICLE IS MOVING

For schematics and connector information, refer to Wiring Diagrams Cell 101.

Normal Operation and Fault Symptoms

When the vehicle is in motion, the BCM sends a PWM signal to the sunroof sliding glass panel motor, which then applies increased force when closing the sliding glass panel of the roof opening to reduce the possibility of reversal.

The sunroof motor must be initialized after performing repairs on any part of the sunroof system, or when the sunroof motor, glass, assembly or air deflector has been removed or replaced for any reason. REFER TO: Power Sunroof Initialization (501-17 Sunroof Panel, General Procedures).

DTC Fault Trigger Conditions

Trouble Code Description Fault Trigger Condition
BCM B12F4:12 Vehicle Speed Output: Short to Battery This DTC is stored in continuous memory and on demand if the vehicle speed circuit is shorted to supply voltage.
BCM B12F4:14 Vehicle Speed Output: Short to Ground or Open This DTC is stored in continuous memory and on demand if the vehicle speed circuit is open or shorted to ground.

Possible Sources

  • Wiring, Terminals or Connectors
  • Sunroof Motor/Module Assembly
  • Sunroof Panel Harness
  • BCM
A1 CHECK THE VEHICLE SPEED OUTPUT CIRCUIT FOR A SHORT TO BATTERY
  • Ignition OFF.
  • Disconnect the sunroof module C921.
  • Disconnect the C2280F connector.
  • The ignition is on.
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    C921-9 Ground

Is there voltage present?
Yes REPAIR the circuit.
No GO to A2
A2 CHECK THE VEHICLE SPEED OUTPUT CIRCUIT FOR A SHORT TO GROUND
  • Ignition OFF.
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    C921-9 Ground

Is the resistance greater than 10000 Ohms?
Yes GO to A3
No REPAIR the circuit.
A3 CHECK THE VEHICLE SPEED OUTPUT CIRCUIT FOR AN OPEN
  • Ignition OFF.
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    C921-9 C2280F-60

Is the resistance less than 3 ohms?
Yes GO to A4
No REPAIR the circuit.
A4 CHECK THE SUNROOF PANEL JUMPER HARNESS
  • Check the sunroof panel jumper harness between the vehicle harness C921 and the sunshade connector and motor connectors for an open or short in the circuit.

Is the sunroof panel jumper harness OK?
Yes GO to A5
No REPAIR the electrical circuit or REPLACE the sunroof panel jumper harness.
A5 CHECK THE SUNROOF MOTOR FOR CORRECT OPERATION
  • Ignition OFF.
  • Disconnect all sunroof panel system connectors, BCM C2280F and all applicable inline connectors.
  • Check for:
    • corrosion - install a new connector or terminals and clean the module contacts
    • damaged or bent pins – install new terminals or pins
    • backed-out pins - install new pins as necessary
  • Connect all sunroof panel system connectors, BCM C2280F and all applicable inline connectors and make sure they are installed correctly.
  • Operate the system and verify that the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, STOP this test and FOLLOW the TSB instructions. If no TSB applies to this concern, INSTALL a new sunroof motor.
REFER TO: Sunroof Motor (501-17 Sunroof Panel, Removal and Installation).
CHECK the system for normal operation. If the concern is not resolved, INSTALL a new BCM.
REFER TO: Body Control Module (BCM) (419-10 Multifunction Electronic Modules, Removal and Installation).
No The system is currently operating correctly. The concern may have been caused by a loose or corroded connector.
PINPOINT TEST B: SUNROOF PANEL HAS EXCESSIVE WIND NOISE

Normal Operation and Fault Symptoms

During normal operation, the sunroof closes tightly and evenly against the roof opening, preventing wind noise. Any seal failure will cause wind noise.

The sunroof motor must be initialized after performing repairs on any part of the sunroof system, or when the sunroof motor, glass, assembly or air deflector has been removed or replaced for any reason. REFER TO: Power Sunroof Initialization (501-17 Sunroof Panel, General Procedures).

Possible Sources

  • Front Seal
  • Primary Seal
  • Acoustic Seal
  • Air Deflector

Visual Inspection and Pre-checks

  • Roof Opening Seals
B1 CHECK THE SUNROOF PANEL NOISE
  • Road test the vehicle with the sunroof panel in the CLOSED, VENT and OPEN positions.

Is wind noise present only in the OPEN position?
Yes GO to B3
No GO to B2
B2 CHECK THE GLASS SUNROOF PANEL SEALS
  • Check the sunroof panel front seal, primary seal and acoustic seal to make sure they are installed correctly and are not damaged.

Are the seals OK?
Yes CHECK other vehicle conditions that may cause excessive wind noise. For example, the secondary windshield, wiper arms, rearview mirrors, ventilation, glove box door, air conditioning and ventilation louvers on the instrument panel, or the antenna base on the trim panel. REPAIR as necessary.
No INSTALL or REPAIR the sunroof opening panel seal(s) as necessary.
B3 CHECK THE AIR DEFLECTOR
  • Check the air deflector for damage and proper attachment.

Is the air deflector in good condition?
Yes PARTIALLY close the sunroof panel until the noise is eliminated. If the noise is eliminated, INFORM the customer that changing the position of the glass will eliminate the wind noise. If the wind noise is not eliminated, INSTALL a new air deflector.
REFER TO: Air Deflector (501-17 Sunroof Panel, Removal and Installation).
No Properly INSTALL or REPLACE the air deflector.
REFER TO: Air Deflector (501-17 Sunroof Panel, Removal and Installation).
PINPOINT TEST C: SUNROOF PANEL LEAKS

Normal Operation and Fault Symptoms

When the sunroof glass is fully closed, it is flush with the roof panel. The sunroof primary seal provides insulation from adverse weather conditions such as rain and wind, preventing them from entering the cabin. A damaged, deformed, or improperly installed seal cannot seal the glass effectively.

Possible Sources

  • Sunroof Panel Initialization
  • Windshield Seal
  • Sunroof Panel Fixed Glass Urethane Seal
  • Sunroof Panel Primary Seal
  • Main Track Assembly
  • Tension Track Assembly
  • Sunroof Frame Urethane Seal

Visual Inspection and Pre-checks

  • Roof Opening Seals
C1 CHECK SUNROOF PANEL MOTOR INITIALIZATION
  • Perform the sunroof panel motor initialization procedure.
    REFER TO: Power Sunroof Panel Initialization (Sunroof Panel 501-17, General Procedures).

Is the concern still present?
Yes GO to C2
No The system is currently operating normally. The sunroof panel motor has not been initialized.
C2 VERIFY THAT THE LEAK IS NOT FROM THE WINDSHIELD
  • Lower the headliner.
    REFER TO: Headliner (501-05 Interior Trim and Ornamentation, Removal and Installation).
  • Check the sunroof panel and windshield for leaks.

Is the leak coming from the windshield?
Yes SEAL the windshield.
REFER TO: Fixed Glass (501-11 Glass, Frames and Mechanisms, General Procedures).
No GO to C3
C3 CHECK THE SUNROOF PANEL LEAK LOCATION
  • Check the front and rear of the sunroof panel for leaks.

Is the leak coming from the fixed sunroof glass or the sunroof antenna area?
Yes REPLACE the sunroof fixed glass.
REFER TO: Sunroof Fixed Glass (501-17 Sunroof Panel, Removal and Installation).
No GO TO C4
C4 CHECK THE CONDITION OF THE SUNROOF PANEL PRIMARY SEAL
  • Check the sunroof panel primary seal for position, deformation, cracks, tears, or looseness.

Is the sunroof panel primary seal in good condition and undamaged?
Yes GO to C5
No INSTALL a new sunroof panel primary seal.
C5 CHECK THE SUNROOF FRAME URETHANE SEAL
  • Check the sunroof frame urethane seal for damage or holes.

Is the sunroof frame urethane seal in good condition?
Yes GO to C6
No If possible, seal the leak point. This can be done by adding urethane to the leak area from inside or outside. For proper materials,
REFER TO: Sunroof Frame (501-17 Sunroof Panel, Removal and Installation).
CHECK the system for proper operation. If the frame urethane seal cannot be repaired, replace the frame. REFER TO: Sunroof Frame (501-17 Sunroof Panel, Removal and Installation).
C6 CHECK THE CONDITION OF THE SUNROOF PANEL TRACK ASSEMBLIES
  • Check the sunroof panel main track and tension track assemblies for damage.

Assembly is in good condition
Yes INSPECT other areas of the vehicle that may allow water to enter the roof, such as the windshield or rear window.
No INSTALL a new sunroof frame assembly if necessary.
REFER TO: Sunroof Frame (501-17 Sunroof Panel, Removal and Installation).
PINPOINT TEST D: SUNROOF PANEL RATTLES

Normal Operation and Fault Symptoms

When the sunroof glass is fully closed, it is flush with the roof panel. All components must be properly secured. The sunroof system consists of many components that require specified torque values and correct installation to avoid NVH concerns. Over time, components may loosen or become damaged, fasteners may loosen, insulation material may wear, and foreign objects may accumulate in the sunroof frame. One or more of these conditions may cause rattling in the sunroof panel system.

Possible Sources

  • Sunroof Panel Lift Arm
  • Main Track Assembly
  • Tension Track Assembly
  • Loose Fasteners
D1 CHECK SUNROOF GLASS OPERATION
  • Check the sunroof glass during operation.

Is the sunroof glass loose?
Yes Tighten the sliding sunroof glass.
REFER TO: Sunroof Glass (501-17 Sunroof Panel, Removal and Installation).
No GO to D2
D2 CHECK THE SUNROOF PANEL TRACKS
  • Open the sunroof glass.
  • Check the main and tension track assemblies, as well as the rear lift arms, for obstructions, loose mounting, or signs of damage.

Are the tracks in good condition?
Yes GO to D3
No If the rear lift arm is the cause of the rattle, REPLACE the sunroof frame.
REFER TO: Sunroof Frame (501-17 Sunroof Panel, Removal and Installation).
D3 CHECK THE SUNROOF PANEL SHIELD
  • Check that the shield is installed correctly.

Is the shield installed correctly?
Yes GO to D4
No INSTALL the shield correctly.
REFER TO: Shield, Roof Opening Panel (501-17 Roof Opening Panel, Removal and Installation).
D4 CHECK THE ROOF OPENING PANEL
  • Make sure the roof opening panel frame, drive unit assembly and wiring harnesses are free of obstructions and damage, and are securely attached.

Is the roof opening panel OK?
Yes The system operates normally.
No REPAIR as necessary.
PINPOINT TEST E: SUNROOF PANEL MAKES NOISE DURING OPERATION

Normal Operation and Fault Symptoms

When the roof opening panel glass closes, it should do so quietly and smoothly. The sunroof system is made up of many components that require specific torque values and correct installation to avoid NVH concerns. Over time, components may loosen or become damaged, attachments may loosen, sound insulation material may wear, and foreign objects may collect in the roof opening panel frame. One or more of these conditions may cause noise in the roof opening panel system.

Possible Sources

  • Roof Opening Obstructions
  • Roof Opening Panel Lift Mechanisms
  • Roof Opening Panel Shield
  • Roof Opening Panel Motor
E1 CHECK THE ROOF OPENING PANEL GLASS FOR OBSTRUCTIONS OR DAMAGE
  • Inspect the roof opening panel for obstructions and damage.

Are there any obstructions and/or damage?
Yes REMOVE all obstructions. REPAIR the roof opening panel if necessary.
No GO to E2
E2 CHECK THE ROOF OPENING PANEL GLASS OPERATION
  • Check the roof opening panel glass while operating it.

Is the roof opening panel glass loose?
Yes Tighten the roof opening panel correctly.
REFER TO: Roof Opening Panel Glass (501-17 Roof Opening Panel, Removal and Installation).
No GO to E3
E3 CHECK THE ROOF OPENING PANEL GUIDES
  • Open the sunroof glass.
  • Check the main and tension track assemblies, as well as the rear lift arms, for obstructions, loose mounting, or signs of damage.

Are the tracks in good condition?
Yes GO to E4
No If the rear lift arm is the cause of the noise, REMOVE any obstructions or REPLACE the roof opening panel frame.
REFER TO: Roof Opening Panel Frame (501-17 Roof Opening Panel, Removal and Installation).
E4 CHECK THE ROOF OPENING PANEL SHIELD
  • Check that the roof opening panel shield moves correctly.

Does the roof opening panel shield move correctly?
Yes GO to E5
No REPAIR or INSTALL a new roof opening panel shield if necessary.
REFER TO: Shield, Roof Opening Panel (501-17 Roof Opening Panel, Removal and Installation).
E5 CHECK THE ROOF OPENING PANEL MOTORS
  • Gain access to the roof opening panel glass and shield motors.
  • Open the roof opening panel and shield.

Is the sunroof motor operating correctly?
Yes INSTALL a new roof opening panel shield motor.
REFER TO: Roof Opening Panel Motor (501-17 Roof Opening Panel, Removal and Installation).
No INSTALL a new roof opening panel motor.
REFER TO: Roof Opening Panel Motor (501-17 Roof Opening Panel, Removal and Installation).
PINPOINT TEST F: SUNROOF PANEL DOES NOT OPEN, CLOSE OR VENT

For schematics and connector information, refer to Wiring Diagrams Cell 101.

Normal Operation and Fault Symptoms

The roof opening panel motor receives battery voltage constantly from the BJB fuse F37 (30A) and receives ignition voltage (delayed accessory) from the BCM fuse F6 (10A). The roof opening panel motor is grounded at G300 and the roof opening panel switch is grounded at G203. When the roof opening panel switch is pressed to open the roof, a ground signal is sent to the roof opening panel motor in the open circuit. When the roof opening panel switch is pulled to close the roof, a ground signal is sent to the roof opening panel motor in the closed circuit. When the roof opening panel tilt switch is pressed, a ground signal is sent to the roof opening panel motor in the tilt/vent switch circuit. The motor responds to these signals depending on the position of the glass panel and shield. A one-touch operation is performed by pressing either switch for less than 1 second. For more information on operation, REFER TO: Roof Opening Panel System Operation and Component Description (501-17 Roof Opening Panel, Description and Operation).

A communication link exists between the shield motor and the roof motor for rear and fourth communication only between the two motors, not for diagnostics. If the communication circuit between the roof motor and the shield motor is open or shorted, the roof motor will operate only to fully close the sunroof glass, and the shield motor will not operate at all.

Possible Sources

  • Fuses
  • Wiring, Terminals or Connectors
  • Sunroof Motor/Module Assembly
  • Roof Opening Panel Switch
  • Sunroof Panel Harness

Visual Inspection and Pre-checks

  • BCM Fuse F6 (10A)
  • BJB Fuse F37 (30A)
F1 CHECK POWER WINDOW OPERATION
  • The ignition is on.
  • Try to operate the power windows.

Do the power windows operate normally?
Yes GO to F2
No Perform the diagnostics for the auxiliary delay relay circuit.
REFER TO: Glass, Frames and Mechanisms - Vehicles With: Driver Window One-Touch Down (501-11 Glass, Frames and Mechanisms, Diagnosis and Testing).
F2 CHECK SHIELD OPERATION
  • Press and hold the shield open switch until the shield is fully open.
  • Press and hold the shield close switch until the shield is fully closed.

Does the shield operate correctly?
Yes GO to F3
No GO to F8
F3 CHECK THE ROOF OPENING PANEL GLASS OPERATION
  • Check the operation of the roof opening panel glass.
    • Press and release the glass switch. The glass should open fully in one-touch open mode. If not, press and hold the glass open switch to fully open the glass.
    • Pull and release the glass switch. The glass should close approximately 8 in. (200 mm) from the closed position. Then pull and hold the glass close switch to fully close the glass.
    • Press and release the vent switch. The glass should move to the vent position. If not, press and hold the vent switch to fully vent the glass.

Does the glass operate correctly?
Yes The roof opening panel is now operating correctly.
No • If the sunroof glass does not operate with one-touch control, but opens, closes and vents manually, perform the operation (press and hold).
REFER TO: Sunroof Electric Motor Initialization (501-17 Sunroof, General Procedures). • If the glass does not operate with any of the press-and-hold switches, GO to F8.
• If the glass operates correctly when pressing and holding a specific individual switch, GO to F4.
F4 CHECK THE SUNROOF MOTOR CONTROL CIRCUITS FOR A SHORT TO VOLTAGE
  • Ignition OFF.
  • Disconnect the sunroof module C921.
  • Disconnect the sunroof switch C9001.
  • The ignition is on.
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    C921-1 Ground
    C921-2 Ground

Is there voltage present?
Yes REPAIR the circuit.
No GO to F5
F5 CHECK THE SUNROOF MOTOR CONTROL CIRCUITS FOR A SHORT TO GROUND
  • Ignition OFF.
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    C921-1 Ground
    C921-2 Ground

Is the resistance less than 3 ohms?
Yes GO to F6
No REPAIR the circuit.
F6 CHECK THE SUNROOF MOTOR CONTROL CIRCUITS FOR AN OPEN
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    C921-1 C9001-2
    C921-2 C9001-3

Is the resistance less than 3 ohms?
Yes GO to F7
No REPAIR the circuit.
F7 CHECK THE SUNROOF MOTOR CONTROL CIRCUITS FOR A SHORT CIRCUIT
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    C921-1 C921-2

Is the resistance greater than 10000 ohms?
Yes GO to F11
No REPAIR the circuit.
F8 CHECK THE SUNROOF SWITCH GROUND CIRCUIT
  • Ignition OFF.
  • Disconnect the sunroof switch C9001.
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    C9001-4 Ground

Is the resistance less than 3 ohms?
Yes GO to F9
No REPAIR the circuit.
F9 CHECK THE SUNROOF MODULE GROUND CIRCUIT
  • Disconnect the sunroof module C921.
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    C921-21 Ground

Is the resistance less than 3 ohms?
Yes GO to F10
No REPAIR the circuit.
F10 CHECK THE SUNROOF MODULE VOLTAGE CIRCUITS
  • The ignition is on.
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    C921-14 Ground
    C921-16 Ground

Is the voltage greater than 11 volts?
Yes GO to F11
No CHECK that the BCM fuses F2 (10 A) and F37 (30 A) are OK.
If the fuses are OK, REPAIR the faulty circuit for high resistance or an open.
If the fuses are not OK, REFER TO the wiring diagrams to determine the cause of the short circuit.
F11 CHECK THE SUNROOF JUMPER HARNESS
  • Check the sunroof jumper harness between the vehicle harness C3921 and the shield connector and the motor connectors for an open or short circuit.

Is the sunroof panel jumper harness OK?
Yes GO to F12
No REPAIR the electrical circuit or REPLACE the sunroof panel jumper harness.
F12 CHECK THE SUNROOF MOTOR/MODULES AND SWITCH FOR CORRECT OPERATION
  • Ignition OFF.
  • Disconnect the entire sunroof system and the related inline connectors.
  • Check for:
    • corrosion - install a new connector or terminals and clean the module contacts
    • damaged or bent pins – install new terminals or pins
    • backed-out pins - install new pins as necessary
  • Connect the entire sunroof system and the related inline connectors and make sure they are installed correctly.
  • Operate the system and verify that the concern is still present.

Is the concern still present?
Yes CHECK in OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, STOP this test and FOLLOW the TSB instructions. If no TSB applies to this concern, INSTALL a new sunroof motor and shade motor.
REFER TO: Sunroof Motor (501-17 Sunroof, Removal and Installation).
CHECK the system for normal operation. If the concern still exists, INSTALL a new sunroof switch. REFERENCE: Sunroof Control Switch (501-17 Sunroof, Removal and Installation).
No The system is currently operating correctly. The concern may have been caused by a loose or corroded connector.
PINPOINT TEST G: SUNSHADE DOES NOT OPEN AND CLOSE

For schematics and connector information, refer to Wiring Diagrams Cell 101.

Normal Operation and Fault Symptoms

The shade motor is constantly supplied with battery voltage from fuse F37 (30 A) of the BJB, and receives ignition voltage (delayed accessory) from the BCM fuse F6 (10 A). The sunroof motor is grounded through circuit G300, and the sunroof switch is grounded through circuit G203. When the shade open switch is pressed, a signal is sent to the shade motor, the circuit to the sunshade is opened, and the shade opens. When the shade close switch is pressed, a signal is sent to the shade motor, the circuit to the sunshade is closed, and the shade closes.

If the K (communication) bus circuit between the sunroof motor and the shade motor is open or shorted, the sunroof motor will only close the sunroof fully once, then it cannot be used. Also, if the K bus circuit is open or shorted, the shade motor will not operate, but the sunroof will close to the fully closed position once.

If the shade is not opened at least to the front of the rear window (comfort stop), the glass will not open.

Possible Sources

  • Fuse(s)
  • Wiring, Terminals or Connectors
  • Sunroof Motor/Module Assembly
  • Sunroof switch panel
G1 CHECK THE SHADE CONTROL CIRCUITS FOR A SHORT TO VOLTAGE
  • Ignition OFF.
  • Disconnect the sunroof module C921.
  • Disconnect the sunroof switch C9041.
  • The ignition is on.
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    C921-4 Ground
    C921-5 Ground

Is there voltage present?
Yes Repair the circuit.
No GO to G2
G2 CHECK THE SHADE CONTROL CIRCUITS FOR A SHORT TO GROUND
  • Ignition OFF.
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    C921-4 Ground
    C921-5 Ground

Is the resistance greater than 10000 ohms?
Yes GO to G3
No REPAIR the circuit.
G3 CHECK THE SHADE CONTROL CIRCUITS FOR AN OPEN
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    C921-4 C9041-2
    C921-5 C9041-3

Is the resistance less than 3 ohms?
Yes GO to G4
No REPAIR the circuit.
G4 CHECK THE SHADE CONTROL CIRCUITS FOR A SHORT CIRCUIT
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    C921-4 C921-5

Is the resistance greater than 10000 ohms?
Yes GO to G5
No REPAIR the circuit.
G5 CHECK THE SUNROOF JUMPER HARNESS
  • Check the sunroof panel jumper harness between the vehicle harness C921 and the sunshade connector and motor connectors for an open or short in the circuit.

Is the sunroof panel jumper harness OK?
Yes GO to G6
No REPAIR the electrical circuit or REPLACE the sunroof panel jumper harness.
G6 CHECK THE SUNROOF MOTOR/MODULES AND SWITCH FOR CORRECT OPERATION
  • Ignition OFF.
  • Disconnect the entire sunroof system and the related inline connectors.
  • Check for:
    • corrosion - install a new connector or terminals and clean the module contacts
    • damaged or bent pins – install new terminals or pins
    • backed-out pins - install new pins as necessary
  • Connect the entire sunroof system and the related inline connectors and make sure they are installed correctly.
  • Operate the system and verify that the concern is still present.

Is the concern still present?
Yes CHECK in OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, STOP this test and FOLLOW the TSB instructions. If no TSB applies to this concern, INSTALL a new sunroof motor and shade motor.
REFER TO: Sunroof Motor (501-17 Sunroof, Removal and Installation).
CHECK the system for normal operation. If the concern still exists, INSTALL a new sunroof switch. REFERENCE: Sunroof Control Switch (501-17 Sunroof, Removal and Installation).
No The system is currently operating correctly. The concern may have been caused by a loose or corroded connector.
PINPOINT TEST H: ONE-TOUCH OPEN/CLOSE DOES NOT WORK

For schematics and connector information, refer to Wiring Diagrams Cell 101.

Normal Operation and Fault Symptoms

All sunroof switches are one-touch, position-type switches that can operate with a single touch in either direction by pressing the switch for less than 1 second. For manual operation, simply press and hold the switch until the sunroof glass or sunshade is in the desired position, then release the switch. When the sunroof glass is in the fully closed position or between fully closed and full vent positions, the vent switch operates either manually or with one-touch control, similar to the sunroof and sunshade switches. If the sunshade is not opened at least to the front of the rear fixed glass (comfort stop) when the sunroof glass or vent switch is pressed, the sunshade will first open to the comfort stop position before the sunroof glass moves. The sunroof glass and sunshade will not move at the same time. One-touch operation of the sunroof or sunshade can be cancelled at any time by pressing any sunroof switch during operation. When the sunroof is open and the one-touch close switch is pressed, a signal is sent to the sunroof motor through the sunroof closed circuit, causing the sunroof to close with one-touch operation (it closes approximately 8 in. (200 mm) from the fully closed position only). One-touch open operation is similar to one-touch close, except when the sunshade is closed. When the sunroof motor is commanded to perform a one-touch open operation, the motors will communicate, the sunshade motor will perform a one-touch open operation, and then the sunroof motor will perform the requested one-touch open operation. Sunshade one-touch operation is similar to the sunroof, except that when the sunroof is open, the sunshade will only move to the comfort stop position. The sunroof does not open due to one-touch closing of the sunshade. For additional information on operation, REFER TO: Sunroof Panel - System Operation and Component Description (501-17 Sunroof Panel, Description and Operation).

Possible Sources

  • Sunroof Initialization (Sunroof Motor or Sunshade Motor)
  • Sunroof Motor/Module Assembly
  • Sunshade Motor
  • Roof Opening Panel Switch
H1 CHECK SUNROOF MOTORS FOR INITIALIZATION
  • Perform the power sunroof motor initialization procedure for the sunroof and sunshade.
    REFER TO: Power Sunroof Initialization (501-17 Sunroof Panel, General Procedures).
  • Operate the system with one-touch control.

Is the concern still present?
Yes GO to H2
No The system is currently operating normally. The sunroof panel motor has not been initialized.
H2 CHECK SUNROOF MOTOR/MODULES AND SWITCH FOR PROPER OPERATION
  • Ignition OFF.
  • Disconnect the entire sunroof system and the related inline connectors.
  • Check for:
    • corrosion - install a new connector or terminals and clean the module contacts
    • damaged or bent pins – install new terminals or pins
    • backed-out pins - install new pins as necessary
  • Connect the entire sunroof system and the related inline connectors and make sure they are installed correctly.
  • Operate the system and verify that the concern is still present.

Is the concern still present?
Yes CHECK in OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, STOP this test and FOLLOW the TSB instructions. If no TSB applies to this concern, INSTALL a new sunroof motor and shade motor.
REFER TO: Sunroof Motor (501-17 Sunroof, Removal and Installation).
CHECK the system for normal operation. If the concern still exists, INSTALL a new sunroof switch. REFERENCE: Sunroof Control Switch (501-17 Sunroof, Removal and Installation).
No The system is currently operating correctly. The concern may have been caused by a loose or corroded connector.

Test yourself

A quick Ford Escape quiz: every answer comes with an explanation and a link to the manual page.