• Perform the Diagnostic System Check prior to using this diagnostic procedure:Diagnostic System Check - Vehicle
• Review the description of Strategy Based Diagnosis:Strategy Based Diagnosis
• An overview of each diagnostic category can be found here:Diagnostic Procedure Instructions

For an overview of the component/system, refer to:Active Grille Air Shutter Description and Operation

• Ambient Air TemperatureGreater than 8°C (46°F)
• LIN Bus 1DTC=Not Set
• Ignition and Start Signal=8 to 16 V
• Ignition and Start Switch Signal=OnorEngine » Running

• LIN Bus 1=Enabled
• Ignition and Start Signal=8 to 16 V
• Ignition and Start Switch Signal=OnorEngine » Running

Active Grille Air Shutter Position=Commanded state does not match the actual state—Greater than 5%

Serial data message from component:M96A Active Grille Air Shutter Actuator 1=Invalid Data Received

DTCs listed in the DTC Descriptor category=Type B DTC

DTCs listed in the DTC Descriptor category=Type B DTC

Active Grille Air Shutter Schematics

Master Electrical Component List

• Circuit Testing
• Connector Repairs
• Testing for Intermittent Conditions and Poor Connections
• Wiring Repairs

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Control Module References

1. Ignition/Vehicle & All vehicle systems » Off
2. Inspect for the following conditions:
• Ice/Snow@M96A Active Grille Air Shutter Actuator 1
• Dirt/Dust/Sand@M96A Active Grille Air Shutter Actuator 1
• Debris/Mud@M96A Active Grille Air Shutter Actuator 1
• If a condition exists

  Repair as necessary

• If none of the conditions exists
3. Ignition » On / Vehicle » In Service Mode
4. Verify DTC U1345, U1347 is not set
• If any of the DTCs are set

  Refer to:Diagnostic Trouble Code (DTC) List - Vehicle

• If none of the DTCs are set
5. Verify the following parameters are within 5% of each other:

   Active Grille Air Shutter Position&Desired Active Grille Air Shutter Position

• If not in the specified range

  Refer to: Circuit/System Testing

• If in the specified range
6. Verify the scan tool parameter:
• Active Grille Air Shutter Actuator Test Status=Okay
• Active Grille Air Shutter Serial Communication Status=Okay
• If not the specified state

  Refer to: Circuit/System Testing

• If the specified state
7. Ignition On - Engine Running
8. Verify the scan tool parameter:
• Active Grille Air Shutter Ice Protection Mode=Inactive
• Active Grille Air Shutter Initialization Status=Complete
• If not the specified state

Note:

• On certain applications, the Active Grill Air Shutter Initialization and Control Function are restricted to the current ignition cycle. If the ignition is turned off, the initialization must be performed again.
• In colder climates, ensure the vehicle is warmed to temperatures above 10 °C (50 °F) before proceeding with Active Grill Air Shutter initialization. The Active Grill Air Shutter Position control function must also be performed at temperatures above 10 °C (50 °F).
• To perform the Active Grill Air Shutter Initialization:

1. Verify the scan tool parameter:Ambient Air Temperature Sensor—Warmer than 10°C (50°F)
2. Perform the scan tool configuration/reset function:Ambient Air Temperature Calculation Reset
3. Verify the scan tool parameter:Active Grille Air Shutter Ice Protection Mode=Inactive
4. Test drive the vehicle.—Greater than 8 km/h (5 MPH)
5. Verify the scan tool parameter:Active Grille Air Shutter Initialization Status=Complete
6. Proceed to next step
• If the specified state
9. Perform the appropriate scan tool control function:Active Grille Air Shutter Position»Command the component to the maximum position/speed&Command the component to the minimum position/speed—Release Control

   Verify the scan tool parameter:

• Active Grille Air Shutter Position=Desired Active Grille Air Shutter Position
• Active Grille Air Shutter Serial Communication Status=Okay
• If not the specified state

  Refer to: Circuit/System Testing

• If the specified state
10. Verify a condition does not exist with the component:M96A Active Grille Air Shutter Actuator 1

    Perform the appropriate scan tool control function:Active Grille Air Shutter Position»50%

• Active Grille Air Shutter Actuator Test Status=Okay
• Active Grille Air Shutter Initialization Status=Complete
• Active Grille Air Shutter Serial Communication Status=Okay
• Perform the action while monitoring the parameter:
• Wiggle the harness and connector(s):M96A Active Grille Air Shutter Actuator 1
• Wiggle the harness and connector(s):K20 Engine Control Module
• Wiggle the harness and connector(s):X50A Engine Wiring Harness Junction Block
• If a condition exists

  Repair as necessary » Wiring / Terminal(s) / Electrical Connector(s)

• If no condition exists
11. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
• If the DTC sets

  Repeat the procedure starting at step 5

• If the DTC does not set
12. All OK.

Note: It may take up to 2 min for all vehicle systems to power down before an accurate ground or low reference circuit continuity test can be performed.

1. Ignition/Vehicle & All vehicle systems » Off
2. Disconnect the component:M96A Active Grille Air Shutter Actuator 1
3. Test for less than 5 Ω between the test points:Ground circuit terminal 4@Component harness&Ground
• If 5 Ω or greater
1. Disconnect the appropriate ground connection:
2. Test for less than 2 Ω between the test points:Ground circuit terminal 4@Component harness&The other end of the circuit@Ground circuit terminal
• If 2 Ω or greater » Repair the open/high resistance in the circuit.
• If less than 2 Ω » Repair the open/high resistance in the ground connection.
• If less than 5 Ω
4. Ignition » On / Vehicle » In Service Mode
5. Verify a test lamp turns On between the test points:Ignition circuit terminal 1@Component harness&Ground
• If the test lamp does not turn On and the circuit fuse is OK
1. Ignition/Vehicle » Off & Remove » Test lamp
2. Test for less than 2 Ω between the test points:Ignition circuit terminal 1@Component harness&Output terminal@Fuse
• If 2 Ω or greater » Repair the open/high resistance in the circuit.
• If less than 2 Ω » Verify the fuse is OK and there is voltage at the fuse.
• If the test lamp does not turn On and the circuit fuse is open
1. Ignition/Vehicle » Off & Remove » Test lamp
2. Connect the component:M96A Active Grille Air Shutter Actuator 1
3. Replace the component:Fuse
4. Ignition » On / Vehicle » In Service Mode
5. Verify the fuse does not open.
• If the fuse opens and there are components connected to the circuit » Disconnect a component and repeat procedure starting at step 5.1
• If the fuse opens with all components disconnected from the circuit » Repair the short to ground on the circuit.
• If the fuse does not open after disconnecting a component from the circuit » Replace the component disconnected last.
• If the fuse does not open.

Note: It may be necessary to use a scan tool control function to operate a component.

6. Operate the component:Each component on the circuit—One at a time

Verify the fuse does not open when any of the components are activated.

• If the fuse opens » Replace the component that caused the fuse to open when activated.
• If the fuse does not open.
7. All OK.
• If the test lamp turns On
6. Connect a DMM between the test points:Serial Data circuit terminal 2@Component harness&Ground

   Verify the DMM displays between 3.5 and 12 V&Fluctuates

• If less than 3.5 V and does not fluctuate
1. Ignition/Vehicle » Off
2. Disconnect the appropriate electrical connector:K20 Engine Control Module
3. Test for infinite resistance between the test points:Serial Data circuit terminal 2@Component harness&Ground
• If less than infinite resistance » Repair the short to ground on the circuit.
• If infinite resistance
4. Test for less than 2 Ω between the test points:Serial Data circuit terminal 2@Component harness&The other end of the circuit@Control module harness
• If 2 Ω or greater » Repair the open/high resistance in the circuit.
• If less than 2 Ω » Replace the component:K20 Engine Control Module
• If greater than 12 V and does not fluctuate
1. Ignition/Vehicle » Off
2. Disconnect the appropriate electrical connector:K20 Engine Control Module
3. Ignition » On / Vehicle » In Service Mode
4. Test for less than 1 V between the test points:Serial Data circuit terminal 2@Component harness&Ground
• If 1 V or greater » Repair the short to voltage on the circuit.
• If less than 1 V » Replace the component:K20 Engine Control Module
• If between 3.5 and 12 and fluctuates
7. Test or replace the component:M96A Active Grille Air Shutter Actuator 1

Perform the Diagnostic Repair Verification after completing the repair:Diagnostic Repair Verification

For control module replacement, programming, and setup refer to:Control Module References