DTC P05A0

DTC P05A0:  Shutter Grille Assembly (Upper) Malfunction

General Description 

Courtesy of HONDA, U.S.A., INC.

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 

Enable Conditions 

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 221 deg.F (105 deg.C) or more and the ECT sensor 2 output temperature [ECT SENSOR 2] is 209 deg.F (98 deg.C) or more.

[ ]: 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.

• Shutter grille stuck
• Temporary restriction of the shutter grille by foreign matter or freezing
• Shutter grille internal circuit failure

Diagnosis Details 

Conditions for setting the DTC 

When a malfunction is detected, 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 Pending DTC, the Confirmed DTC, and the freeze data can be cleared with the scan tool Clear command.