Last Modified: 08-21-2023 6.11:8.1.0 Doc ID: RM100000001YB87
Model Year Start: 2022 Model: Avalon HV Prod Date Range: [08/2021 -           ]
Title: EXTERIOR PANELS / TRIM: GRILLE SHUTTER SYSTEM: Grille Shutter does not Operate; 2022 MY Avalon Avalon HV [08/2021 -        ]

Grille Shutter does not Operate

DESCRIPTION

The grille shutter of the radiator shutter sub-assembly may not operate when dirty due to foreign matter, snow, mud, etc., or the power supply voltage deteriorates.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • Before performing troubleshooting, change the grille shutter control mode to maintenance mode.

    Click here 2022 MY Avalon HV [08/2021 -        ]; A25A-FXS (ENGINE CONTROL): SFI SYSTEM: INITIALIZATION

  • If the radiator shutter assembly has been replaced with a new one, perform initialization and change the grille shutter control mode.

    Click here 2022 MY Avalon HV [08/2021 -        ]; A25A-FXS (ENGINE CONTROL): SFI SYSTEM: INITIALIZATION

  • Inspect the fuses for circuits related to this system before performing the following procedure.

PROCEDURE

1.

PERFORM UTILITY USING TECHSTREAM (SWITCH GRILLE SHUTTER CONTROL MODE)

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

Powertrain > Engine > Utility

Tester Display

Switch Grille Shutter Control Mode
NEXT

2.

CHECK FOR 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:

The radiator shutter sub-assembly is free of foreign matter and ice.

NG

GO TO STEP 10

OK

3.

CHECK RADIATOR SHUTTER ASSEMBLY (GRILLE SHUTTER OPERATION)

(a) Remove the radiator shutter assembly.

Click here 2022 MY Avalon Avalon HV [08/2021 -        ]; EXTERIOR PANELS / TRIM: GRILLE SHUTTER: REMOVAL

(b) While using fingers to pinch the fin at the location shown in the illustration, fully open and close the radiator shutter assembly manually and check that it moves smoothly.

HINT:

If the fin is pinched with fingers far from the swing grille actuator assembly, the function may not be able to be inspected correctly.

*a

Swing Grille Actuator Assembly

*b

Fin

OK:

Radiator shutter sub-assembly moves smoothly.

(c) Install the radiator shutter assembly.

Click here 2022 MY Avalon Avalon HV [08/2021 -        ]; EXTERIOR PANELS / TRIM: GRILLE SHUTTER: INSTALLATION

NG

REPLACE RADIATOR SHUTTER ASSEMBLY

OK

4.

CLEAR DTC

(a) Clear the DTCs.

Powertrain > Engine > Clear DTCs

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

NEXT

5.

CHECK DTC

(a) Check for DTCs.

Powertrain > Engine > Trouble Codes

Result

Proceed to

DTCs are not output.

OK

DTCs are output.

NG
NG

GO TO SFI SYSTEM (DIAGNOSTIC TROUBLE CODE CHART)

OK

6.

CHECK HARNESS AND CONNECTOR (SWING GRILLE ACTUATOR ASSEMBLY - POWER SUPPLY AND BODY GROUND)

(a) Disconnect the F4 swing grille actuator assembly connector.

*a

Front view of wire harness connector

(to Swing Grille Actuator Assembly)

(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Condition

Specified Condition

F4-1 (+B) - Body ground

Power switch on (IG)

11 to 14 V

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

F4-3 (GND) - Body ground

Always

Below 1 Ω

(d) Connect the F4 swing grille actuator assembly connector.

NG

GO TO STEP 8

OK

7.

READ VALUE USING TECHSTREAM (GRILLE SHUTTER CONTROL MODE)

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

Powertrain > Engine > Utility

Tester Display

Switch Grille Shutter Control Mode

(b) Read the value displayed on the Techstream.

Powertrain > Engine > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Grille Shutter Control Mode

Grille shutter control mode status

Normal or Maintenance

Normal: Normal mode

Maintenance: Maintenance mode

-

Powertrain > Engine > Data List

Tester Display

Grille Shutter Control Mode

OK:

Normal is displayed.

NEXT

END

HINT:

Operation temporarily abnormal due to fail-safe (abnormal temperature).

8.

CHECK HARNESS AND CONNECTOR (SWING GRILLE ACTUATOR ASSEMBLY - EFI-MAIN NO. 1 RELAY)

(a) Remove the EFI-MAIN NO. 1 relay from the No. 1 engine room relay block and No. 1 junction block assembly.

*1

No. 1 Engine Room Relay Block and No. 1 Junction Block Assembly

(EFI-MAIN NO. 1 Relay Holder)

(b) Disconnect the F4 swing grille actuator assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

F4-1 (+B) - No. 1 engine room relay block and No. 1 junction block assembly EFI-MAIN NO. 1 relay terminal 5

Always

Below 1 Ω

F4-1 (+B) or No. 1 engine room relay block and No. 1 junction block assembly EFI-MAIN NO. 1 relay terminal 5 - Body ground

Always

10 kΩ or higher

(d) Install the EFI-MAIN NO. 1 relay from the No. 1 engine room relay block and No. 1 junction block assembly.

(e) Connect the F4 swing grille actuator assembly connector.

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

9.

CHECK ECM POWER SOURCE CIRCUIT

(a) Check the ECM power source circuit.

Click here 2019 - 2022 MY Avalon HV [04/2018 -        ]; A25A-FXS (ENGINE CONTROL): SFI SYSTEM: ECM Power Source Circuit

NEXT

GO TO STEP 7

10.

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.

NEXT

GO TO STEP 7