P05A6

Code

Generic P — Powertrain

Active Grille Air Shutter A Supply Voltage Circuit/Open

Brand: Generic

Type: P — Powertrain

Views: UK: 29 EN: 46 RU: 27

AI status

Completed

ready

Completed 100%

Page language: EN

Malfunction Indicator Lamp (MIL) or service light illuminated
Active grille shutter does not move when commanded (stuck open or closed)
Reduced aerodynamics / slightly worse fuel economy at speed
Engine warm-up or cooling behavior may be altered (longer warm-up or higher idle temperature)
Possible diagnostic trouble codes related to charging or body electrical circuits

Read freeze frame and stored data with a scan tool; attempt active tests to command the shutter
Visual inspection of wiring and connectors at the grille shutter actuator and fuse/relay box
Check relevant fuses and relays for continuity and correct operation
Back-probe connector: measure supply voltage and ground at actuator connector with ignition on and while commanding shutter
Check continuity and resistance of supply and ground circuits between actuator and fuse/ECM
Wiggle test wiring while commanding to reproduce fault

Supply voltage at actuator connector: near battery voltage (~11–14.5 V) with ignition on/when commanded
Control signal type: either switched +12V or ground-side driver / PWM depending on manufacturer (check service manual)
Expected actuator resistance: low ohms (motor winding); typically a few ohms to tens of ohms — large or infinite indicates open circuit
Typical actuator current draw: small DC motor range (tenths to a few amps); no current indicates open circuit
Continuity from actuator supply pin to fuse/relay and to battery positive should be present

Verify DTC and capture freeze frame. Clear codes and see if code returns after driving or commanded tests.
Perform a visual inspection of the grille shutter assembly, connector, and harness for damage, corrosion, or water intrusion.
Check fuses and relays related to the engine/accessory circuits; replace any blown fuses and retest.
With connector accessible, back-probe the power terminal. With ignition on and shutter not commanded, check presence/absence of supply per OEM spec.
Command the grille shutter with a scan tool while measuring supply voltage and ground at the actuator. Note any change; no supply indicates open/high-resistance feed.
Measure resistance between the actuator power pin and the fuse/relay output, and between the actuator ground pin and chassis ground. Repair any open/high resistance found.
If supply and ground are good but actuator does not operate, bench-test or replace the actuator. Verify motor windings for continuity; infinite resistance indicates an open motor.
If wiring, connectors, fuses, relays and actuator test OK, investigate ECM/PCM driver output for faults and consult vehicle-specific service manual for further ECM tests or reprogramming.
After repairs, clear codes and perform functional tests and a short drive cycle to confirm the fault is resolved and the code remains cleared.

Corroded/loose connector at the shutter actuator
Damaged wiring harness (chafing, broken conductor) between fuse/relay and actuator
Blown fuse or failed relay for accessory/engine module circuits
Failed actuator motor or internal wiring open
Ground terminal loose or high resistance