Toyota Avalon Service & Repair Manual: Grille Shutter does not Operate

DESCRIPTION

The swing grille actuator assembly receives signals from the ECM, hybrid vehicle control ECU assembly and air conditioning amplifier assembly via CAN communication. Based on these signals, the swing grille actuator assembly operates the radiator shutter sub-assembly.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

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

    Click here

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

    Click here

PROCEDURE

1.

CHECK FOR FOREIGN OBJECT

(a) Check that the radiator shutter sub-assembly is free of foreign matter and ice.

OK:

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

NG

FOREIGN OBJECT (REMOVE FOREIGN MATTER AND/OR ICE)

OK

2.

CHECK HARNESS AND CONNECTOR (RADIATOR SHUTTER SUB-ASSEMBLY - POWER SUPPLY AND BODY GROUND)

(a) Disconnect the A41 radiator shutter sub-assembly connector.

*a

Front view of wire harness connector

(to Radiator Shutter Sub-assembly)

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

A41-4 - Body ground

Power switch off

11 to 14 V

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

A41-1 - Body ground

Always

Below 1 Ω

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

3.

INSPECT RADIATOR SHUTTER SUB-ASSEMBLY

(a) Disconnect the z17 radiator shutter sub-assembly connector.

*a

Component without harness connected

(Radiator Shutter Sub-assembly)

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

A41-4 - z17-1 (+B)

Always

Below 1 Ω

A41-4 or z17-1 (+B) - Body ground

Always

10 kΩ or higher

A41-1 - z17-3 (GND)

Always

Below 1 Ω

A41-1 or z17-3 (GND) - Body ground

Always

10 kΩ or higher

NG

REPLACE RADIATOR SHUTTER SUB-ASSEMBLY

OK

4.

READ VALUE 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.

(e) According to the display on the Techstream, perform the Active Test to open and close the grille shutter.

Body Electrical > Grill Shutter > Active Test

Tester Display

Measurement Item

Control Range

Diagnostic Note

Shutter Closing Operation Lock Detection

Function to perform a closing operation until motor lock is detected and the motor stops

OFF/Close

-

Shutter Opening Operation Lock Detection

Function to perform an opening operation until motor lock is detected and the motor stops

OFF/Open

-

Body Electrical > Grill Shutter > Active Test

Tester Display

Shutter Closing Operation Lock Detection

Body Electrical > Grill Shutter > Active Test

Tester Display

Shutter Opening Operation Lock Detection

(f) Enter the following menus: Body Electrical / Grill Shutter / Data List.

(g) Read the Data List according to the display on the Techstream.

Body Electrical > Grill Shutter > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Shutter Operation Lock Detection Result for Active Test

Result of Active Test Shutter Closing Operation Lock Detection and Shutter Opening Operation Lock Detection

Normal, Open Error or Close Error

Normal: Normal lock detected

Open Error: Lock detected in abnormal position while performing Active Test Shutter Opening Operation Lock Detection

Close Error: Lock detected in abnormal position while performing Active Test Shutter Closing Operation Lock Detection

 
Body Electrical > Grill Shutter > Data List

Tester Display

Shutter Operation Lock Detection Result for Active Test

OK:

"Normal" is displayed on the Techstream.

OK

USE SIMULATION METHOD TO CHECK

NG

5.

CHECK RADIATOR SHUTTER SUB-ASSEMBLY

(a) Remove the radiator shutter sub-assembly.

Click here

(b) Remove the swing grille actuator assembly.

Click here

(c) Manually open and close the radiator shutter sub-assembly and check that it moves smoothly.

OK:

The radiator shutter sub-assembly moves smoothly.

OK

REPLACE SWING GRILLE ACTUATOR ASSEMBLY

NG

REPLACE RADIATOR SHUTTER SUB-ASSEMBLY

    Dtc Check / Clear

    How To Proceed With Troubleshooting

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