DTC Advanced Diagnostics: P05A0, P05AF

DTC P05A0:Shutter Grille Assembly (Upper) Malfunction
DTC P05AF:Shutter Grille Assembly (Lower) Malfunction

General Description

The shutter grille system opens/closes the shutter depending on the driving conditions. The system improves fuel efficiency by reducing the wind drag. The shutter is controlled by the shutter grille which includes the actuator with CPU. The powertrain control module (PCM) sends open/close requests which depends on the driving conditions to the shutter grille via the local interconnect network (LIN) line. If the shutter grille actuator detects a restriction and if the restriction condition continues even if the initial learning is retried for a specified time, the PCM confirms the abnormality and stores a DTC.

Monitor Execution, Sequence, Duration, DTC Type

Execution	Continuous
Sequence	None
Duration	Initial learning retry three times, and more than 2.5 seconds
DTC Type	One drive cycle, MIL off

Enable Conditions

Condition
State of the engine	Running

Malfunction Threshold

Both of the conditions occur:

	The shutter grille actuator detects a restriction and if the restriction condition continues for at least 2.5 seconds after the initial learning is retried for three times.
	The engine coolant temperature (ECT) sensor 1 output temperature [ECT SENSOR 1] is 225 °F (107 °C)^¹ (221 °F (105 °C) ^2) or more and the ECT sensor 2 output temperature [ECT SENSOR 2] is 209 °F (98 °C) or more.

*1: 1.5 L engine

*2: 2.4 L engine

[ ]: HDS Parameter

Possible Cause

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.

DTC: P05A0

	Upper shutter grille stuck
	Temporary restriction of the upper shutter grille by foreign matter or freezing.
	Upper shutter grille failure

DTC: P05AF

	Lower shutter grille stuck
	Temporary restriction of the lower shutter grille by foreign matter or freezing.
	Lower shutter grille failure

Common

PCM internal circuit failure

Diagnosis Details

Conditions for setting the DTC

When a malfunction is detected, the PGM-FI display comes on and a Pending DTC, a Confirmed DTC, and the freeze data are stored in the PCM memory. The MIL does not come on.

Conditions for clearing the DTC

The PGM-FI display is cleared if the malfunction does not return in three consecutive trips in which the diagnostic runs. The PGM-FI display, the Pending DTC, the Confirmed DTC, and the freeze data can be cleared with the scan tool Clear command.