Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: Active Grille Air Shutter "A" Actuator Stuck Closed (P059F73,P05A072)

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual / Engine / A25a-fxs Engine Control / Sfi System / Active Grille Air Shutter "A" Actuator Stuck Closed (P059F73,P05A072)

DESCRIPTION

The grille shutter system is composed of the radiator shutter sub-assembly and grille shutter ECU (swing grille actuator assembly).

When the certain vehicle conditions are met, the grille shutter system operates the swing grille actuator assembly to open and close the radiator shutter sub-assembly and control the volume of air flowing through the radiator assembly into the engine compartment. This results in increased thermal efficiency and increased fuel economy due to reduced aerodynamic drag. This control is performed based on signals received via CAN communication: vehicle speed signal, engine coolant temperature signal, hybrid inverter coolant temperature signal, ambient temperature signal and refrigerant pressure.

If the grille shutter ECU (swing grille actuator assembly) detects a malfunction in itself or any of the mechanical components of the grille shutter system, it will output a malfunction signal to the ECM and the ECM will store a DTC.

Control List

Control	Description
Closing Operation Control	The grille shutter closes when certain conditions related to the vehicle speed, engine coolant temperature, inverter coolant temperature, ambient temperature and refrigerant pressure are met.
Opening Operation Control	The grille shutter opens when certain conditions related to the vehicle speed, engine coolant temperature, inverter coolant temperature, ambient temperature and refrigerant pressure are met.
Power Switch Off-linked Opening Operation Control	Opens the grille shutter when the power switch is turned off in order to prevent the grille shutter from becoming stuck closed while the vehicle is stopped.
Power Switch On (IG) Closing/Opening Operation	If the detection conditions of a DTC are met during a trip, the next time the power switch is turned on (IG), a grille shutter opening and closing operation will be performed in order to judge if the malfunction still exists.
Winter Control Mode	Stops the grille shutter at a position other than the fully closed position and suspends grille shutter operation in order to prevent it from becoming stuck closed when the ambient temperature is 5°C (41°F) or lower. Winter control mode is canceled when the ambient temperature becomes 10°C (50°F) or higher.
Retry Operation	If a mechanical malfunction is detected during a grille shutter operation, the operation will be attempted again.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

Note

P059F73

Active Grille Air Shutter "A" Actuator Stuck Closed

All of the following conditions are met and the ECM receives a malfunction signal 17 times* (2 trip detection logic):

Grille shutter locking is detected.
The grille shutter is not within the normal closing operation judgment area.
The grille shutter operation was reattempted once.
Grille shutter closing operation malfunction judgment has occurred once or more.

Radiator shutter sub-assembly
Swing grille actuator assembly

Comes on

DTC stored

SAE Code: P059F

P05A072

Active Grille Air Shutter "A" Actuator Stuck Open

All of the following conditions are met and the ECM receives a malfunction signal 17 times* (2 trip detection logic):

Grille shutter locking is detected.
The grille shutter is not within the normal opening operation judgment area.
The grille shutter operation was reattempted once.
Grille shutter opening operation malfunction judgment has occurred once or more.

Radiator shutter sub-assembly
Swing grille actuator assembly

Comes on

DTC stored

SAE Code: P05A0

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

If the grille shutter ECU (swing grille actuator assembly) detects that the grille shutter has stopped during an opening or closing operation, due to foreign matter or a malfunction, it will send a malfunction signal to the ECM and the ECM will store a DTC.

Detection Condition	DTC No.
Closing Operation	P059F73 (Active Grille Air Shutter "A" Actuator Stuck Closed)
Opening Operation	P05A072 (Active Grille Air Shutter "A" Actuator Stuck Open)

MONITOR STRATEGY

Related DTCs	P059F: Active grille air shutter stuck off P05A0: Active grille air shutter stuck on
Required Sensors/Components (Main)	Swing grille actuator assembly Radiator shutter sub-assembly
Required Sensors/Components (Related)	-
Frequency of Operation	Continuous
Duration	17 times
MIL Operation	2 driving cycles
Sequence of Operation	None

TYPICAL ENABLING CONDITIONS

P059F

Monitor runs whenever the following DTCs are not stored	None
Auxiliary battery voltage	10.5 to 16 V
Command to close active grille air shutter	On
Active grille air shutter motor speed sensor range check fail	Not occurred
Shutter control timeout condition (*1)	Not met
Active grille air shutter control circuit fail	Not occurred
Lost communication with hybrid control module	Not occurred
Active grille air shutter control module fail	Not occurred
Motor lock condition (*2)	Met
Active grille air shutter first operation	Close
Either of the following conditions is met	1 or 2
1. Number of active grille air shutter motor speed sensor 1 signal pulse	1 time or more
2. Time after active grille air shutter open control is operated	0.61 seconds or more

P05A0

Monitor runs whenever the following DTCs are not stored	None
Auxiliary battery Voltage	10.5 to 16 V
Command to open active grille air shutter	On
Active grille air shutter motor speed sensor range check fail	Not occurred
Shutter control timeout condition (*1)	Not met
Active grille air shutter control circuit fail	Not occurred
Lost communication with hybrid control module	Not occurred
Active grille air shutter control module fail	Not occurred
Motor lock condition (*2)	Met
Either of the following conditions is met	1 or 2
1. Number of active grille air shutter motor speed sensor 1 signal pulse	1 time or more
2. Time after active grille air shutter close control is operated	0.61 seconds or more

*1: Shutter control timeout condition judgment	-
Either of the following conditions is met	1 or 2
1. Time after active grille air shutter close control is operated	11 seconds or more
2. Time after active grille air shutter open control is operated	11 seconds or more

*2: Motor lock condition judgment	-
Either of the following conditions is met	1 or 2
1. All of the following conditions are met	-
Number of active grille air shutter motor speed sensor 1 signal pulse	Less than 24 times
Pulse period of active grille air shutter motor speed sensor 1 signal	0.61 seconds or more
Pulse period of active grille air shutter motor speed sensor 2 signal	0.61 seconds or more
2. All of the following conditions are met	-
Number of active grille air shutter motor speed sensor 1 signal pulse	24 times or more
Pulse period of active grille air shutter motor speed sensor 1 signal	0.25 seconds or more
Pulse period of active grille air shutter motor speed sensor 2 signal	0.25 seconds or more

TYPICAL MALFUNCTION THRESHOLDS

P059F

All of the following conditions are met	-
Active grille air shutter first operation	Close
Number of active grille air shutter motor speed sensor 1 signal pulse	1 time or more

P05A0

All of the following conditions are met	-
Active grille air shutter first operation	Open
Number of active grille air shutter motor speed sensor 1 signal pulse	1 time or more

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.

WIRING DIAGRAM

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.
Click here

(Select Powertrain in Health Check and then check the time stamp data.)

Click here
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.
Click here

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.	INSPECT GRILLE SHUTTER (FOREIGN MATTER AND ICE)

(a) Check the area around the shutters and the links of the grille shutter for foreign matter and ice.

OK:

No foreign matter or ice.

GO TO STEP 8

3.	PERFORM ACTIVE TEST USING TECHSTREAM (GRILLE SHUTTER OPERATION)

(a) Connect the Techstream to the DLC3.

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

(d) 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.

Body Electrical > Grill Shutter > Active Test

Active Test Display
Shutter Closing Operation Lock Detection

Data List Display
Shutter Operation Lock Detection Result for Active Test

(e) 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.

(f) 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.

Body Electrical > Grill Shutter > Active Test

Active Test Display
Shutter Opening Operation Lock Detection

Data List Display
Shutter Operation Lock Detection Result for Active Test

(g) 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.

HINT:

When the value of Data List item Shutter Operation Lock Detection Result for Active Test is "Normal", it can be determined that the grille shutter system has returned to normal.

GO TO STEP 6

CLEAR DTC

(a) Connect the Techstream to the DLC3.

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

(d) Enter the following menus: Powertrain / Engine / Trouble Codes.

(e) Clear the DTCs.

Powertrain > Engine > Clear DTCs

(f) Turn the power switch off and wait for at least 30 seconds.

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

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

(b) Turn the Techstream on.

Body Electrical > Grill Shutter > Utility

Tester Display
Grill Shutter Control Mode Switching

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

(e) Check for DTCs and make sure that DTC B1333 is not output.

Body Electrical > Grill Shutter > Trouble Codes

END

6.	PERFORM ACTIVE TEST USING TECHSTREAM (SWING GRILLE ACTUATOR ASSEMBLY OPERATION)

(a) Remove the radiator shutter sub-assembly.

Click here

(b) Remove the swing grille actuator assembly.

Click here

(d) Connect the Techstream to the DLC3.

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

(f) Turn the Techstream on.

(g) Enter the following menus: Body Electrical / Grill Shutter / Active Test / Shutter Closing Operation Lock Detection.

Body Electrical > Grill Shutter > Active Test

Tester Display
Shutter Closing Operation Lock Detection

(h) According to the display on the Techstream, perform the Active Test and check the operation of the swing grille actuator assembly.

OK:

Operation is normal.

(i) Enter the following menus: Body Electrical / Grill Shutter / Active Test / Shutter Opening Operation Lock Detection.

Body Electrical > Grill Shutter > Active Test

Tester Display
Shutter Opening Operation Lock Detection

(j) According to the display on the Techstream, perform the Active Test and check the operation of the swing grille actuator assembly.

OK:

Operation is normal.

HINT:

Perform "Grill Shutter Control Mode Switching and Grill Shutter Initialization" after replacing the swing grille actuator assembly.

Click here

REPLACE SWING GRILLE ACTUATOR ASSEMBLY

7.	INSPECT RADIATOR SHUTTER SUB-ASSEMBLY (GRILLE SHUTTER OPERATION)

(a) Remove the radiator shutter sub-assembly.

Click here

(b) Remove the swing grille actuator assembly.

Click here

OK:

Radiator shutter sub-assembly moves smoothly.

HINT:

Perform "Grill Shutter Control Mode Switching and Grill Shutter Initialization" after replacing the swing grille actuator assembly or radiator shutter sub-assembly.

Click here

REPLACE SWING GRILLE ACTUATOR ASSEMBLY

REPLACE RADIATOR SHUTTER SUB-ASSEMBLY

8.	REMOVE FOREIGN MATTER OR ICE (CLEAN GRILLE SHUTTER)

(a) Remove any foreign matter and/or ice from the area around the shutters and the links of the grille shutter.

9.	PERFORM ACTIVE TEST USING TECHSTREAM (GRILLE SHUTTER OPERATION)

(a) Connect the Techstream to the DLC3.

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

(d) 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.

Body Electrical > Grill Shutter > Active Test

Active Test Display
Shutter Closing Operation Lock Detection

Data List Display
Shutter Operation Lock Detection Result for Active Test

(e) 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.

(f) 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.

Body Electrical > Grill Shutter > Active Test

Active Test Display
Shutter Opening Operation Lock Detection

Data List Display
Shutter Operation Lock Detection Result for Active Test

(g) 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.

HINT:

When the value of Data List item Shutter Operation Lock Detection Result for Active Test is "Normal", it can be determined that the grille shutter system has returned to normal.

GO TO STEP 6

10.

CLEAR DTC

(a) Connect the Techstream to the DLC3.

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

(d) Enter the following menus: Powertrain / Engine / Trouble Codes.

(e) Clear the DTCs.

Powertrain > Engine > Clear DTCs

(f) Turn the power switch off and wait for at least 30 seconds.

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

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

(b) Turn the Techstream on.

Body Electrical > Grill Shutter > Utility

Tester Display
Grill Shutter Control Mode Switching

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

(e) Check for DTCs and make sure that DTC B1333 is not output.

Body Electrical > Grill Shutter > Trouble Codes

END

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