Ford Explorer: Front End Body Panels / Diagnosis and Testing - Active Grille Shutter

Ford Explorer 2020-2024 Service Manual / Body and Paint / Body and Paint / Front End Body Panels / Diagnosis and Testing - Active Grille Shutter

Diagnostic Trouble Code (DTC) Chart

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices.
REFER to: Diagnostic Methods (100-00 General Information, Description and Operation).


  Diagnostic Trouble Code Chart


Module   DTC Description Action
  PCM P059F:00 Active Grille Air Shutter "A" Performance/Stuck Off: No Sub Type Information   GO to Pinpoint Test A
  PCM P05A1:00 Active Grille Air Shutter "A" Position Sensor Minimum/Maximum Stop Performance: No Sub Type Information   GO to Pinpoint Test A
  PCM P05A2:00 Active Grille Air Shutter "A" Control Circuit/Open: No Sub Type Information   GO to Pinpoint Test A
  PCM P05A7:00 Active Grille Air Shutter "A" Supply Voltage Circuit Low: No Sub Type Information   GO to Pinpoint Test A
  PCM P05AE:00 Active Grille Air Shutter "B" Performance/Stuck Off: No Sub Type Information   GO to Pinpoint Test A
  PCM P05B0:00 Active Grille Air Shutter "B" Position Sensor Minimum/Maximum Stop Performance: No Sub Type Information   GO to Pinpoint Test A
  PCM P05B1:00 Active Grille Air Shutter "B" Control Circuit/Open: No Sub Type Information   GO to Pinpoint Test A
  PCM P05B6:00 Active Grille Air Shutter "B" Supply Voltage Circuit Low: No Sub Type Information   GO to Pinpoint Test A
  PCM P05C0:00 Active Grille Air Shutter Module "A" Over Temperature: Over Temperature   GO to Pinpoint Test B
  PCM P05C1:00 Active Grille Air Shutter Module "B" Over Temperature: No Sub Type Information   GO to Pinpoint Test A
  PCM U0046:00 Vehicle Communication Bus C: No Sub Type Information   GO to Pinpoint Test A
  PCM U0284:00 Lost Communication with Active Grille Air Shutter Module "A": No Sub Type Information   GO to Pinpoint Test A
  PCM U0285:00 Lost Communication with Active Grille Air Shutter Module "B": No Sub Type Information   GO to Pinpoint Test A

Symptom Chart(s)

Symptom Chart: Active Grille Shutter

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices.
REFER to: Diagnostic Methods (100-00 General Information, Description and Operation).


  Symptom Chart


Condition Possible Sources Actions
The active grille shutter is inoperative or does not operate correctly
  • Refer to the Pinpoint Test
  GO to Pinpoint Test A

Pinpoint Test(s)


PINPOINT TEST A : THE ACTIVE GRILLE SHUTTER IS INOPERATIVE OR DOES NOT OPERATE CORRECTLY

Refer to Wiring Diagrams Cell 33 for schematic and connector information.

Normal Operation and Fault Conditions

REFER to: Active Grille Shutter - System Operation and Component Description (501-02 Front End Body Panels, Description and Operation).

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
PCM P05C1:00 Active Grille Air Shutter Module "B" Over Temperature: No Sub Type Information This DTC sets when the lower active grille shutter actuator detects excessive internal heat.
PCM P05B1:00 Active Grille Air Shutter "B" Control Circuit/Open: No Sub Type Information When the lower active grille shutter actuator senses open circuit, it sends a message to the PCM via the LIN. The PCM sets this DTC when the fault is communicated for a predetermined amount of time.
PCM P05A2:00 Active Grille Air Shutter "A" Control Circuit/Open: No Sub Type Information When the upper active grille shutter actuator senses open circuit, it sends a message to the PCM via the LIN. The PCM sets this DTC when the fault is communicated for a predetermined amount of time.
PCM P059F:00 Active Grille Air Shutter "A" Performance/Stuck Off: No Sub Type Information When the upper active grille shutter actuator senses it is unable to move the active grille shutter, it sends a message to the PCM via the LIN. The PCM sets this DTC when the fault is communicated for a predetermined amount of time.
PCM P05A1:00 Active Grille Air Shutter "A" Position Sensor Minimum/Maximum Stop Performance: No Sub Type Information When the upper active grille shutter actuator senses it is unable to obtain a fully open or closed position of the active grille shutter, it sends a message to the PCM via the LIN. The PCM then sets the DTC when the fault is communicated for a predetermined amount of time.
PCM P05A7:00 Active Grille Air Shutter "A" Supply Voltage Circuit Low: No Sub Type Information When the upper active grille shutter actuator senses low voltage, it sends a message to the PCM via the LIN. The PCM sets this DTC when the fault is communicated for a predetermined amount of time.
PCM P05AE:00 Active Grille Air Shutter "B" Performance/Stuck Off: No Sub Type Information When the lower active grille shutter actuator senses it is unable to move the active grille shutter, it sends a message to the PCM via the LIN. The PCM sets this DTC when the fault is communicated for a predetermined amount of time.
PCM P05B0:00 Active Grille Air Shutter "B" Position Sensor Minimum/Maximum Stop Performance: No Sub Type Information When the lower active grille shutter actuator senses it is unable to obtain a fully open or closed position of the active grille shutter, it sends a message to the PCM via the LIN. The PCM then sets the DTC when the fault is communicated for a predetermined amount of time.
PCM P05B6:00 Active Grille Air Shutter "B" Supply Voltage Circuit Low: No Sub Type Information When the lower active grille shutter actuator senses low voltage, it sends a message to the PCM via the LIN. The PCM sets this DTC when the fault is communicated for a predetermined amount of time.
PCM U0046:00 Vehicle Communication Bus C: No Sub Type Information This DTC sets when the PCM detects a short to voltage, ground or open in the LIN.
PCM U0284:00 Lost Communication with Active Grille Air Shutter Module "A": No Sub Type Information When the PCM does not receive communication from the upper active grille shutter actuator for a predetermined amount of time, the PCM sets this DTC.
PCM U0285:00 Lost Communication with Active Grille Air Shutter Module "B": No Sub Type Information When the PCM does not receive communication from the lower active active grille shutter actuator for a predetermined amount of time, the PCM sets this DTC.

Possible Sources

  • Fuse
  • Wiring, terminals or connectors
  • Active grille shutter actuator
  • Active grille shutters
  • PCM

Visual Inspection and Pre-checks

  • Verify BJB fuse 14 (15A) is OK.
  • Make sure the grille opening does not have any debris or other obstructions that inhibit operation of the active grille shutter.
  • Make sure the active grille shutter actuator electrical connector is not disconnected.
  • Check for functional operation: Key-On > Key-Off > Start Engine.
  • The AGS must must perform its learn procedure from fully open then to the commanded position.
A1 RETRIEVE THE PCM (POWERTRAIN CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)
  • Ignition ON.
  • Using a diagnostic scan tool, perform PCM self-test.

Is any DTC present?
Yes For P05A7, U0046 or U0284, GO to A2
For P05B6 or U0285, GO to A10
For P059F or P05A1, GO to A7
For P05AE or P05B0, GO to A15
For P05A2, GO to A3
For P05B1, GO to A11
For P05C0, INSTALL a new upper active grille shutter actuator.
REFER to: Active Grille Shutter Actuator (501-02 Front End Body Panels, Removal and Installation). For P05C1, INSTALL a new lower active grille shutter actuator.
REFER to: Active Grille Shutter Actuator (501-02 Front End Body Panels, Removal and Installation).
No GO to A2

A2 CHECK THE VOLTAGE SUPPLY TO THE UPPER ACTIVE GRILLE SHUTTER ACTUATOR
  • Ignition OFF.
  • Disconnect: Upper Active Grille Shutter Actuator C1977.
  • Ignition ON.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C1977-3   Ground

Is the voltage greater than 11 volts?
Yes GO to A3
No VERIFY BJB fuse 14 (15A) is OK. If OK, REPAIR the circuit. If not OK, REFER to the Wiring Diagrams manual to identify the cause of the circuit short.

A3 CHECK THE UPPER ACTIVE GRILLE SHUTTER ACTUATOR GROUND CIRCUIT FOR AN OPEN
  • Ignition OFF.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C1977-1   Ground

Is the resistance less than 3 ohms?
Yes For DTC U0046 or U0284, GO to A4
For DTC P05A7, GO to A9
No REPAIR the circuit.

A4 CHECK THE LIN (LOCAL INTERCONNECT NETWORK) CIRCUIT FOR AN OPEN
  • Disconnect: Upper Active Grille Shutter Actuator C1977.
  • Disconnect: PCM C1381B (2.3L EcoBoost) or C1551B (3.0 L EcoBoost) or C175B (3.3L Duratec)
  • For vehicles equipped with 2.3L EcoBoost, measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C1977-2   C1381B-47
  • For vehicles equipped with 3.0L EcoBoost, measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C1977-2   C1551B-11
  • For vehicles equipped with 3.3L Duratec, measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C1977-2   C175B-11

Is the resistance less than 3 ohms?
Yes GO to A5
No REPAIR the circuit.

A5 CHECK THE LIN (LOCAL INTERCONNECT NETWORK) CIRCUIT FOR A SHORT TO VOLTAGE
  • Ignition ON.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C1977-2   Ground

Is any voltage present?
Yes REPAIR the circuit.
No GO to A6

A6 CHECK THE LIN (LOCAL INTERCONNECT NETWORK) CIRCUIT FOR A SHORT TO GROUND
  • Ignition OFF.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C1977-2   Ground

Is the resistance greater than 10,000 ohms?
Yes GO to A7
No REPAIR the circuit. CLEAR the Diagnostic Trouble Codes (DTCs). REPEAT the self-test.

A7 VERIFY THE UPPER ACTIVE GRILLE SHUTTER OPERATION USING THE GRILLE SHUTTER A POSITION - COMMANDED (GRILL_A_CMD) PARAMETER IDENTIFICATION (PID)
  • Start the engine and allow it to idle for at least 30 seconds to allow for the active grille shutter calibration to complete.
  • Using a diagnostic scan tool, view PCM Parameter Identifications (PIDs).
  • Using a diagnostic scan tool, select the PCM Parameter Identification (PID) GRILL_A_CMD and active command the upper active grille shutter from 100% (open) to 0% (closed) while observing the upper active grille shutter operation from the front of the vehicle.

Does the upper active grille shutter fully open and close when commanded by the diagnostic scan tool?
Yes The upper active grille shutter system is operating correctly at this time. The concern may have been caused by debris or obstruction.
No GO to A8

A8 CHECK THE UPPER ACTIVE GRILLE SHUTTER FOR OBSTRUCTIONS AND/OR MECHANICAL BINDING CONCERNS
  • Ignition OFF.
  • Remove the upper active grille shutter actuator.
    REFER to: Active Grille Shutter Actuator (501-02 Front End Body Panels, Removal and Installation).
  • Manually open and close the upper active grille shutter, removing any obstructions which can inhibit operation of the upper active grille shutter or linkage. The active grille shutter should open and close easily with no binding.

Does the upper active grille shutter operate freely with no binding or obstruction?
Yes GO to A9
No REPAIR the binding/obstruction, or if necessary, INSTALL a new upper active grille shutter.
REFER to: Radiator Grille Opening Panel (501-02 Front End Body Panels, Removal and Installation).

A9 CHECK FOR CORRECT UPPER ACTIVE GRILLE SHUTTER ACTUATOR OPERATION
  • Disconnect: Upper Active Grille Shutter Actuator C1977 (if not previously disconnected).
  • Inspect the upper active grille shutter actuator electrical connector and jumper harness.
  • Repair:
    • corrosion (install new connector or terminals - clean module pins)
    • damaged or bent pins - install new terminals/pins as necessary
    • pushed-out pins - install new pins as necessary
  • Reconnect the upper active grille shutter actuator connector, jumper harness and all previously disconnected system connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if 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, DISCONTINUE this test and FOLLOW TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new upper active grille shutter actuator.
REFER to: Active Grille Shutter Actuator (501-02 Front End Body Panels, Removal and Installation).
CLEAR the Diagnostic Trouble Codes (DTCs). REPEAT the self-test. If the concern is still present,
   Click here to access Guided Routine (PCM). Internet Explorer version 11 or greater is required to perform this Pinpoint Test.
No The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.

A10 CHECK THE VOLTAGE SUPPLY TO THE LOWER ACTIVE GRILLE SHUTTER ACTUATOR
  • Ignition OFF.
  • Disconnect: Lower Active Grille Shutter Actuator C1978.
  • Ignition ON.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C1978-3   Ground

Is the voltage greater than 11 volts?
Yes GO to A11
No VERIFY BJB fuse 14 (15A) is OK. If OK, REPAIR the circuit. If not OK, REFER to the Wiring Diagrams manual to identify the cause of the circuit short.

A11 CHECK THE LOWER ACTIVE GRILLE SHUTTER ACTUATOR GROUND CIRCUIT FOR AN OPEN
  • Ignition OFF.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C1978-1   Ground

Is the resistance less than 3 ohms?
Yes For DTC U0285, GO to A12
For DTC P05B6, GO to A17
No REPAIR the circuit.

A12 CHECK THE LIN (LOCAL INTERCONNECT NETWORK) CIRCUIT FOR AN OPEN
  • Disconnect: Lower Active Grille Shutter Actuator C1978.
  • Disconnect: PCM C1381B (2.3L EcoBoost) or C1551B (3.0 L EcoBoost) or C175B (3.3L Duratec)
  • For vehicles equipped with 2.3L EcoBoost, measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C1978-2   C1381B-47
  • For vehicles equipped with 3.0L EcoBoost, measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C1978-2   C1551B-11
  • For vehicles equipped with 3.3L Duratec, measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C1978-2   C175B-11

Is the resistance less than 3 ohms?
Yes GO to A13
No REPAIR the circuit.

A13 CHECK THE LIN (LOCAL INTERCONNECT NETWORK) CIRCUIT FOR A SHORT TO VOLTAGE
  • Ignition ON.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C1978-2   Ground

Is any voltage present?
Yes REPAIR the circuit.
No GO to A14

A14 CHECK THE LIN (LOCAL INTERCONNECT NETWORK) CIRCUIT FOR A SHORT TO GROUND
  • Ignition OFF.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C1978-2   Ground

Is the resistance greater than 10,000 ohms?
Yes GO to A15
No REPAIR the circuit. CLEAR the Diagnostic Trouble Codes (DTCs). REPEAT the self-test.

A15 VERIFY THE LOWER ACTIVE GRILLE SHUTTER OPERATION USING THE GRILLE SHUTTER B POSITION - COMMANDED (GRILL_B_CMD) PARAMETER IDENTIFICATION (PID)
  • Start the engine and allow it to idle for at least 30 seconds to allow for the active grille shutter calibration to complete.
  • Using a diagnostic scan tool, view PCM Parameter Identifications (PIDs).
  • Using a diagnostic scan tool, select the PCM Parameter Identification (PID) GRILL_B_CMD and active command the lower active grille shutter from 100% (open) to 0% (closed) while observing the lower active grille shutter operation from the front of the vehicle.

Does the lower active grille shutter fully open and close when commanded by the diagnostic scan tool?
Yes The lower active grille shutter system is operating correctly at this time. The concern may have been caused by debris or obstruction.
No GO to A16

A16 CHECK THE LOWER ACTIVE GRILLE SHUTTER FOR OBSTRUCTIONS AND/OR MECHANICAL BINDING CONCERNS
  • Ignition OFF.
  • Remove the lower active grille shutter actuator.
    REFER to: Active Grille Shutter Actuator (501-02 Front End Body Panels, Removal and Installation).
  • Manually open and close the lower active grille shutter, removing any obstructions which can inhibit operation of the active grille shutter or linkage. The active grille shutter should open and close easily with no binding.

Does the lower active grille shutter operate freely with no binding or obstruction?
Yes GO to A17
No REPAIR the binding/obstruction, or if necessary, INSTALL a new lower active grille shutter.
REFER to: Radiator Grille Opening Panel (501-02 Front End Body Panels, Removal and Installation).

A17 CHECK FOR CORRECT LOWER ACTIVE GRILLE SHUTTER ACTUATOR OPERATION
  • Disconnect: Lower Active Grille Shutter Actuator C1978 (if not previously disconnected).
  • Inspect the lower active grille shutter actuator electrical connector and jumper harness.
  • Repair:
    • corrosion (install new connector or terminals - clean module pins)
    • damaged or bent pins - install new terminals/pins as necessary
    • pushed-out pins - install new pins as necessary
  • Reconnect the lower active grille shutter actuator connector, jumper harness and all previously disconnected system connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if 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, DISCONTINUE this test and FOLLOW TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new active grille shutter actuator.
REFER to: Active Grille Shutter Actuator (501-02 Front End Body Panels, Removal and Installation).
CLEAR the Diagnostic Trouble Codes (DTCs). REPEAT the self-test. If the concern is still present,
   Click here to access Guided Routine (PCM). Internet Explorer version 11 or greater is required to perform this Pinpoint Test.
.
No The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.

PINPOINT TEST B : P05C0

Normal Operation and Fault Conditions

REFER to: Active Grille Shutter - System Operation and Component Description (501-02 Front End Body Panels, Description and Operation).

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
PCM P05C0:00 Active Grille Air Shutter Module "A" Over Temperature: No Sub Type Information This DTC sets when the upper active grille shutter actuator detects excessive internal heat. When the grille shutter actuator senses excessive heat, it sends a message to the PCM via LIN. The PCM sets this DTC when the fault is communicated for a predetermined amount of time.

Possible Sources

  • Active grille shutter.
B1 CHECK THE PCM (POWERTRAIN CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)
  • Ignition ON.
  • Using diagnostic scan tool, retrieve the PCM Diagnostic Trouble Codes (DTCs).

Is DTC P05C0 present in the PCM?
Yes INSTALL a new active grille shutter.
REFER to: Radiator Grille Opening Panel (501-02 Front End Body Panels, Removal and Installation).
No The system is operating correctly at this time. The concern may have been caused by intermittent condition.


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