Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: Active Grille Air Shutter "A" Actuator Slipping (P05A074)

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual / Engine / A25a-fxs Engine Control / Sfi System / Active Grille Air Shutter "A" Actuator Slipping (P05A074)

DESCRIPTION

Refer to DTC P059F73.

Click here

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

Note

P05A074

Active Grille Air Shutter "A" Actuator Slipping

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

  • After a grille shutter opening operation (grille shutter locking not detected), the grille shutter is estimated to be fully opened but the end shaft switch (swing grille actuator assembly) is not in the open position.
  • After a grille shutter closing operation (grille shutter locking not detected), the grille shutter is estimated to be fully closed but the end shaft switch (built into the swing grille actuator assembly) is not in the closed position.
  • 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 condition of the end shaft switch (radiator shutter sub assembly) and the estimated position of the grille shutter, based on the signal from the Hall ICs built into the swing grille actuator assembly, are different, it will output a malfunction signal to the ECM and the ECM will store a DTC.

MONITOR STRATEGY

Related DTCs

P05A0: Active grille air shutter verify switch input

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

Case 1

Monitor runs whenever the following DTCs are not stored

None

Auxiliary battery voltage

10.5 to 16 V

Either of the following conditions is met

1 or 2

1. Command to close active grille air shutter

On

2. 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)

Not met

Case 2

Monitor runs whenever the following DTCs are not stored

None

Auxiliary battery voltage

10.5 to 16 V

Either of the following conditions is met

1 or 2

1. Command to close active grille air shutter

On

2. Command to open active grille air shutter

On

Either of the following conditions is met

1 or 2

1. Time after active grille air shutter close control is stopped

1 second or more

2. Time after active grille air shutter open control is stopped

1 second or more

Active grille air shutter motor speed sensor range check fail

Not occurred

Shutter control timeout condition (*1)

Not met

Lost communication with hybrid control module

Not occurred

Active grille air shutter control module fail

Not occurred

Motor lock condition (*2)

Not met

*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

Either of the following conditions is met

1 or 2

1. All of the following conditions are met

-

Active grille air shutter close control

Operating

Shutter position estimated by active grille air shutter motor speed sensor pulse input

Close position

One of the following conditions is met

(a), (b) or (c)

(a). Both of the following conditions are met

-

Shaft close position switch

Off

Shaft open position switch

Off

(b). Both of the following conditions are met

-

Shaft close position switch

Off

Shaft open position switch

On

(c). Both of the following conditions are met

-

Shaft close position switch

On

Shaft open position switch

On

2. All of the following conditions are met

-

Active grille air shutter open control

Operating

Shutter position estimated by active grille air shutter motor speed sensor pulse input

Open position

One of the following conditions is met

(a), (b) or (c)

(a). Both of the following conditions are met

-

Shaft close position switch

Off

Shaft open position switch

Off

(b). Both of the following conditions are met

-

Shaft close position switch

On

Shaft open position switch

Off

(c). Both of the following conditions are met

-

Shaft close position switch

On

Shaft open position switch

On

CONFIRMATION DRIVING PATTERN

  1. Connect the Techstream to the DLC3.
  2. Turn the power switch on (IG).
  3. Turn the Techstream on.
  4. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
  5. Turn the power switch off and wait for at least 30 seconds.
  6. Turn the power switch on (IG).
  7. Turn the Techstream on.
  8. Enter the following menus: Body Electrical / Grill Shutter / Utility / Grill Shutter Control Mode Switching.
  9. According to the display on the Techstream, change the grille shutter control mode from normal mode to maintenance mode.
  10. 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.
  11. 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.

  12. 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.
  13. 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).

(c) Turn the Techstream on.

(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.

NEXT

2.

PERFORM ACTIVE TEST USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

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

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Grill Shutter / Active Test / Shutter Closing Operation Lock Detection / Data List / Close Motor Lock and End Shaft SW.

Body Electrical > Grill Shutter > Active Test

Active Test Display

Shutter Closing Operation Lock Detection

Data List Display

Close Motor Lock

End Shaft SW

(e) According to the display on the Techstream, perform the Active Test and read the Data List.

Standard:

Active Test Item

Data List Item

Close Motor Lock

End Shaft SW

Shutter Closing Operation Lock Detection

Detected

Fully Closed Position

(f) Enter the following menus: Body Electrical / Grill Shutter / Active Test / Shutter Opening Operation Lock Detection / Data List / Open Motor Lock and End Shaft SW.

Body Electrical > Grill Shutter > Active Test

Active Test Display

Shutter Opening Operation Lock Detection

Data List Display

Open Motor Lock

End Shaft SW

(g) According to the display on the Techstream, perform the Active Test and read the Data List.

Standard:

Active Test Item

Data List Item

Open Motor Lock

End Shaft SW

Shutter Opening Operation Lock Detection

Detected

Fully Open Position

HINT:

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

Click here

OK

REPLACE SWING GRILLE ACTUATOR ASSEMBLY

NG

3.

INSPECT SWING GRILLE ACTUATOR ASSEMBLY AND RADIATOR SHUTTER SUB-ASSEMBLY

*1

Swing Grille Actuator Assembly

*2

Radiator Shutter Sub-assembly

*a

Area to be inspected

-

-

(a) Remove the radiator shutter sub-assembly.

Click here

(b) Remove the swing grille actuator assembly.

Click here

(c) Check the connecting parts of the swing grille actuator assembly and radiator shutter sub-assembly shown in the illustration for wear and damage.

Result

Proceed to

Swing grille actuator assembly is worn or damaged

A

Radiator shutter sub-assembly is worn or damaged

B

Normal

C

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

A

REPLACE SWING GRILLE ACTUATOR ASSEMBLY

B

REPLACE RADIATOR SHUTTER SUB-ASSEMBLY

C

4.

INSPECT RADIATOR SHUTTER SUB-ASSEMBLY (END SHAFT SWITCH)

*1

Radiator Shutter Sub-assembly

-

-

*a

Front view of wire harness connector

(to Swing Grille Actuator Assembly)

*b

Component without harness connected

(Radiator Shutter Sub-assembly)

(a) Remove the radiator shutter sub-assembly.

Click here

(b) Remove the swing grille actuator assembly.

Click here

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

Z17-2 (SEN1) - A41-1 (GND)

Grille shutter fully closed

Below 1 Ω

Grille shutter in any position other than fully closed

10 kΩ or higher

Z17-4 (SEN2) - A41-1 (GND)

Grille shutter fully open

Below 1 Ω

Grille shutter in any position other than fully open

10 kΩ or higher

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

OK

REPLACE SWING GRILLE ACTUATOR ASSEMBLY

NG

REPLACE RADIATOR SHUTTER SUB-ASSEMBLY

    Active Grille Air Shutter "A" Actuator Stuck On (P05A27E,P05A27F)

    Active Grille Air Shutter "A" Circuit Short to Ground (P05A211,P05A212,P05A213)

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