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 |
|---|---|---|
C1651-2 | 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 |
|---|---|---|
C1651-2 | Ground |
Is the resistance greater than 10,000 ohms?
Yes | For DTC U0046 or U0248, GO to A10 For all other Diagnostic Trouble Codes (DTCs), GO to A9 |
|---|---|
No | REPAIR the circuit. |
A7 VERIFY THE 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 grille shutter calibration to complete. Using a diagnostic scan tool, view PCM Parameter Identifications (PIDs). Using a diagnostic scan tool, select the PCM GRILL_A_CMD Parameter Identification (PID) and active command the grille shutter from 100% (open) to 0% (closed) while observing the grille shutter operation from the front of the vehicle.
Does the grille shutter fully open and close when commanded by the diagnostic scan tool?
Yes The grille shutter system is operating correctly at this time. The concern may have been
2016 Mustang workshop publication supplied to Mustang Atlas. Original technical text and illustrations; HTML formatting by Mustang Atlas. Source page numbering is retained for traceability. Follow the configuration, revision, warnings, and cross-references in the material. About this edition.