Lexus ES: Grille Shutter does not Operate
DESCRIPTION
The swing grille actuator assembly receives signals from the ECM, hybrid vehicle control ECU 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
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-
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 | .gif) | FOREIGN OBJECT (REMOVE FOREIGN MATTER AND/OR ICE) |
|
.gif)
| 2. | CHECK HARNESS AND CONNECTOR (RADIATOR SHUTTER SUB-ASSEMBLY - POWER SUPPLY AND BODY GROUND) |
| (a) Disconnect the A57 radiator shutter sub-assembly connector. |
|
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| A57-4 (+B) - 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 |
|---|---|---|
| A57-1 (GND) - Body ground | Always | Below 1 Ω |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
| 3. | INSPECT RADIATOR SHUTTER SUB-ASSEMBLY |
| (a) Disconnect the z23 radiator shutter sub-assembly connector. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| A57-4 (+B) - z23-1 (+B) | Always | Below 1 Ω |
| A57-4 (+B) or z23-1 (+B) - Body ground | Always | 10 kΩ or higher |
| A57-1 (GND) - z23-3 (GND) | Always | Below 1 Ω |
| A57-1 (GND) or z23-3 (GND) - Body ground | Always | 10 kΩ or higher |
| NG | | REPLACE RADIATOR SHUTTER SUB-ASSEMBLY |
|
| 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 / Grille Shutter / Active Test.
(e) According to the display on the Techstream, perform the Active Test to open and close the grille shutter.
Body Electrical > Grille 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 | - |
| Tester Display |
|---|
| Shutter Closing Operation Lock Detection |
| Tester Display |
|---|
| Shutter Opening Operation Lock Detection |
(f) Enter the following menus: Body Electrical / Grille Shutter / Data List.
(g) Read the Data List according to the display on the Techstream.
Body Electrical > Grille 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 |
| Tester Display |
|---|
| Shutter Operation Lock Detection Result for Active Test |
OK:
"Normal" is displayed on the Techstream.
| OK | | USE SIMULATION METHOD TO CHECK |
|
| 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 |
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