A25A-FXS (ENGINE CONTROL): SFI SYSTEM: P05A211,P05A212,P05A213; Active Grille Air Shutter "A" Circuit Short to Ground; 2019 - 2021 MY Avalon HV [04/2018

Last Modified: 08-21-2023	6.11:8.1.0	Doc ID: RM100000001B4EC
Model Year Start: 2019	Model: Avalon HV	Prod Date Range: [04/2018 - 08/2021]
Title: A25A-FXS (ENGINE CONTROL): SFI SYSTEM: P05A211,P05A212,P05A213; Active Grille Air Shutter "A" Circuit Short to Ground; 2019 - 2021 MY Avalon HV [04/2018 - 08/2021]

DTC

P05A211

Active Grille Air Shutter "A" Circuit Short to Ground

DTC

P05A212

Active Grille Air Shutter "A" Circuit Short to Battery

DTC

P05A213

Active Grille Air Shutter "A" Circuit Open

DESCRIPTION

Refer to DTC P059F73.

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DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Memory	Note
P05A211	Active Grille Air Shutter "A" Circuit Short to Ground	Either of the following conditions is met and the ECM receives a malfunction signal 17 times* (1 trip detection logic): Short to ground detected in the grille shutter motor (swing grille actuator assembly) when a grille shutter operation is requested. Short to ground detected in the motor drive circuit when a grille shutter operation is requested.	Swing grille actuator assembly	Comes on	DTC stored	SAE Code: P05A5
P05A212	Active Grille Air Shutter "A" Circuit Short to Battery	Either of the following conditions is met and the ECM receives a malfunction signal 17 times* (1 trip detection logic): Short to +B detected in the grille shutter motor (swing grille actuator assembly) when a grille shutter operation is requested. Short to +B detected in the motor drive circuit when a grille shutter operation is requested.	Swing grille actuator assembly	Comes on	DTC stored	SAE Code: P05A4
P05A213	Active Grille Air Shutter "A" Circuit Open	Either of the following conditions is met and the ECM receives a malfunction signal 17 times* (1 trip detection logic): Open detected in the grille shutter motor (swing grille actuator assembly) when a grille shutter operation is requested. Open detected in the grille shutter motor circuit when a grille shutter operation is requested. Internal malfunction detected in the grille shutter ECU (swing grille actuator assembly) when a grille shutter operation is requested.	Swing grille actuator assembly	Comes on	DTC stored	SAE Code: P05A2

HINT:

*: For every 65 ms that the ECM receives a grille shutter system malfunction signal from the grille shutter ECU (swing grille actuator assembly) the ECM determines it has received the signal 1 time. If the ECM determines the malfunction signal has been received 17 consecutive times (the signal is received for approximately 1 second continuously), it will store a DTC.

MONITOR DESCRIPTION

Grille Shutter Motor (Swing Grille Actuator Assembly) Malfunction

If the grille shutter ECU (swing grille actuator assembly) detects a malfunction in the grille shutter motor drive circuit when a grille shutter operation is requested, it will output a malfunction signal to the ECM and the ECM will store a DTC.

Detection Condition	DTC No.
Short to Ground	P05A211 (Active Grille Air Shutter "A" Circuit Short to Ground)
Short to +B	P05A212 (Active Grille Air Shutter "A" Circuit Short to Battery)
Open	P05A213 (Active Grille Air Shutter "A" Circuit Open)

Grille Shutter ECU Internal Malfunction

If the grille shutter ECU detects an internal malfunction, it will output a malfunction signal to the ECM and the ECM will store a DTC.

Detection Condition	DTC No.
EEPROM Malfunction	P05A213 (Active Grille Air Shutter "A" Circuit Open)
Analog/Digital Conversion Malfunction	P05A213 (Active Grille Air Shutter "A" Circuit Open)

MONITOR STRATEGY

Related DTCs	P05A2: Active grille air shutter motor drive MOSFET open monitor P05A2: Active grille air shutter control module performance P05A4: Active grille air shutter motor drive MOSFET short monitor high voltage P05A5: Active grille air shutter motor drive MOSFET short monitor low voltage
Required Sensors/Components (Main)	Swing grille actuator assembly
Required Sensors/Components (Related)	-
Frequency of Operation	Continuous
Duration	17 times
MIL Operation	Immediate
Sequence of Operation	None

TYPICAL ENABLING CONDITIONS

P05A2: Active Grille Air Shutter Motor Drive MOSFET Open Monitor (Case 1)

Monitor runs whenever the following DTCs are not stored	None
All of the following conditions are met	-
Either of the following conditions is met	1 or 2
1. Both of the following conditions are met	(a) and (b)
(a). Command to close active grille air shutter	On
(b). Active grille air shutter close control	Not operating
2. Both of the following conditions are met	(c) and (d)
(c). Command to open active grille air shutter	On
(d). Active grille air shutter open control	Not operating
Active grille air shutter control re-try operation	Off
Reverse motor control during shutter position check	Not operating
Auxiliary battery voltage	10.5 to 16 V
Active grille air shutter motor drive MOSFET 1	On
Active grille air shutter motor drive MOSFET 2	Off
Active grille air shutter motor drive MOSFET 3	Off
Active grille air shutter motor drive MOSFET 4	Off

P05A2: Active Grille Air Shutter Motor Drive MOSFET Open Monitor (Case 2)

Monitor runs whenever the following DTCs are not stored	None
All of the following conditions are met	-
Either of the following conditions is met	1 or 2
1. Both of the following conditions are met	(a) and (b)
(a). Command to close active grille air shutter	On
(b). Active grille air shutter close control	Not operating
2. Both of the following conditions are met	(c) and (d)
(c). Command to open active grille air shutter	On
(d). Active grille air shutter open control	Not operating
Active grille air shutter control re-try operation	Off
Reverse motor control during shutter position check	Not operating
Auxiliary battery voltage	10.5 to 16 V
Active grille air shutter motor drive MOSFET 1	Off
Active grille air shutter motor drive MOSFET 2	On
Active grille air shutter motor drive MOSFET 3	Off
Active grille air shutter motor drive MOSFET 4	Off

P05A2: Active Grille Air Shutter Motor Drive MOSFET Open Monitor (Case 3)

Monitor runs whenever the following DTCs are not stored	None
All of the following conditions are met	-
Either of the following conditions is met	1 or 2
1. Both of the following conditions are met	(a) and (b)
(a). Command to close active grille air shutter	On
(b). Active grille air shutter close control	Not operating
2. Both of the following conditions are met	(c) and (d)
(c). Command to open active grille air shutter	On
(d). Active grille air shutter open control	Not operating
Active grille air shutter control re-try operation	Off
Reverse motor control during shutter position check	Not operating
Auxiliary battery voltage	10.5 to 16 V
Active grille air shutter motor drive MOSFET 1	Off
Active grille air shutter motor drive MOSFET 2	Off
Active grille air shutter motor drive MOSFET 3	On
Active grille air shutter motor drive MOSFET 4	Off

P05A2: Active Grille Air Shutter Motor Drive MOSFET Open Monitor (Case 4)

Monitor runs whenever the following DTCs are not stored	None
All of the following conditions are met	-
Either of the following conditions is met	1 or 2
1. Both of the following conditions are met	(a) and (b)
(a). Command to close active grille air shutter	On
(b). Active grille air shutter close control	Not operating
2. Both of the following conditions are met	(c) and (d)
(c). Command to open active grille air shutter	On
(d). Active grille air shutter open control	Not operating
Active grille air shutter control re-try operation	Off
Reverse motor control during shutter position check	Not operating
Auxiliary battery voltage	10.5 to 16 V
Active grille air shutter motor drive MOSFET 1	Off
Active grille air shutter motor drive MOSFET 2	Off
Active grille air shutter motor drive MOSFET 3	Off
Active grille air shutter motor drive MOSFET 4	On

P05A2: Active Grille Air Shutter Control Module Performance

Monitor runs whenever the following DTCs are not stored

None

P05A4, P05A5

Monitor runs whenever the following DTCs are not stored	None
All of the following conditions are met	-
Either of the following conditions is met	1 or 2
1. Both of the following conditions are met	(a) and (b)
(a). Command to close active grille air shutter	On
(b). Active grille air shutter close control	Not operating
2. Both of the following conditions are met	(c) and (d)
(c). Command to open active grille air shutter	On
(d). Active grille air shutter open control	Not operating
Active grille air shutter control re-try operation	Off
Reverse motor control during shutter position check	Not operating
Auxiliary battery voltage	10.5 to 16 V
Active grille air shutter motor drive MOSFET 1	Off
Active grille air shutter motor drive MOSFET 2	Off
Active grille air shutter motor drive MOSFET 3	Off
Active grille air shutter motor drive MOSFET 4	Off

TYPICAL MALFUNCTION THRESHOLDS

P05A2: Active Grille Air Shutter Motor Drive MOSFET Open Monitor (Case 1 and 2)

Active grille air shutter motor voltage

Less than threshold value

P05A2: Active Grille Air Shutter Motor Drive MOSFET Open Monitor (Case 3 and 4)

Active grille air shutter motor voltage

Higher than threshold value

P05A2: Active Grille Air Shutter Control Module Performance

Either of the following conditions is met	1 or 2
1. Abnormal EEPROM access	Detected
2. A/D conversion processing	Not completed

P05A4

Active grille air shutter motor voltage

Higher than threshold value

P05A5

Active grille air shutter motor voltage

Less than threshold value

CONFIRMATION DRIVING PATTERN

Connect the Techstream to the DLC3.
Turn the power switch on (IG).
Turn the Techstream on.
Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the power switch off and wait for at least 30 seconds.
Turn the power switch on (IG).
Turn the Techstream on.
Enter the following menus: Body Electrical / Grill Shutter / Utility / Grill Shutter Control Mode Switching.
According to the display on the Techstream, change the grille shutter control mode from normal mode to maintenance mode.
Enter the following menus: Body Electrical / Grill Shutter / Active Test / Shutter Closing Operation Lock Detection / Data List / Shutter Operation Lock Detection Result for Active Test.
According to the display on the Techstream, perform the Active Test and read the value of Data List item Shutter Operation Lock Detection Result for Active Test.
OK:

"Normal" is displayed.
Enter the following menus: Body Electrical / Grill Shutter / Active Test / Shutter Opening Operation Lock Detection / Data List / Shutter Operation Lock Detection Result for Active Test.
According to the display on the Techstream, perform the Active Test and read the value of Data List item Shutter Operation Lock Detection Result for Active Test.
OK:

"Normal" is displayed.

CAUTION / NOTICE / HINT

NOTICE:

In order to ensure safety, before performing troubleshooting or removing the swing grille actuator assembly or radiator shutter sub-assembly, change the grille shutter control mode to maintenance mode.
Vehicle Control History may be stored in the hybrid vehicle control ECU assembly if the engine is malfunctioning. Certain vehicle condition information is recorded when Vehicle Control History is stored. Reading the vehicle conditions recorded in both the Freeze Frame Data and Vehicle Control History can be useful for troubleshooting.
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(Select Powertrain in Health Check and then check the time stamp data.)

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If any "Engine Malfunction" Vehicle Control History item has been stored in the hybrid vehicle control ECU assembly, make sure to clear it. However, as all Vehicle Control History items are cleared simultaneously, if any Vehicle Control History items other than "Engine Malfunction" are stored, make sure to perform any troubleshooting for them before clearing Vehicle Control History.
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HINT:

Read Freeze Frame Data using the Techstream. The ECM records vehicle and driving condition information as Freeze Frame Data the moment a DTC is stored. When troubleshooting, Freeze Frame Data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.

PROCEDURE

1.	PERFORM UTILITY USING TECHSTREAM (GRILL SHUTTER CONTROL MODE SWITCHING)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Enter the following menus: Body Electrical / Grill Shutter / Utility / Grill Shutter Control Mode Switching.

Body Electrical > Grill Shutter > Utility

Tester Display
Grill Shutter Control Mode Switching

(e) According to the display on the Techstream, change the grille shutter control mode from normal mode to maintenance mode.

2.	REPLACE SWING GRILLE ACTUATOR ASSEMBLY

(a) Replace the swing grille actuator assembly.

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3.	PERFORM UTILITY USING TECHSTREAM (GRILL SHUTTER CONTROL MODE SWITCHING AND GRILL SHUTTER INITIALIZATION)

HINT:

When changing the grille shutter control mode and/or performing initialization by driving the vehicle, the grille shutter control mode can only be changed and initialization can only be performed if the grille shutter system is in maintenance mode.

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(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Enter the following menus: Body Electrical / Grill Shutter / Utility / Grill Shutter Control Mode Switching.

Body Electrical > Grill Shutter > Utility

Tester Display
Grill Shutter Control Mode Switching

(e) According to the display on the Techstream, change the grille shutter control mode from maintenance mode to normal mode.

(f) Enter the following menus: Body Electrical / Grill Shutter / Utility / Grill Shutter Initialization.

Body Electrical > Grill Shutter > Utility

Tester Display
Grill Shutter Initialization

(g) According to the display on the Techstream, perform Grill Shutter Initialization.

(h) Enter the following menus: Body Electrical / Grill Shutter / Data List / Shutter Control State and Shutter Initialization.

Body Electrical > Grill Shutter > Data List

Tester Display
Shutter Control State
Shutter Initialization

(i) According to the display on the Techstream, read the Data List and check that the value of Shutter Control State is "Normal" and Shutter Initialization is "Complete".

END