- DTC judgment completed
- System normal
| Last Modified: 05-13-2024 | 6.11:8.1.0 | Doc ID: RM1000000026JRZ |
| Model Year Start: 2023 | Model: Corolla | Prod Date Range: [09/2022 - ] |
| Title: 2ZR-FXE (ENGINE CONTROL): SFI SYSTEM: P059A71,P059A79; Active Grille Air Shutter "A" Actuator Stuck; 2023 - 2025 MY Corolla Corolla HV [09/2022 - ] | ||
|
DTC |
P059A71 |
Active Grille Air Shutter "A" Actuator Stuck |
|
DTC |
P059A79 |
Active Grille Air Shutter "A" Mechanical Linkage Failure |
DESCRIPTION
The grille shutter system is composed of the radiator shutter sub-assembly and 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.
Control List
|
Control |
Description |
|---|---|
|
Closing Operation Control |
When the grille shutter is open and the vehicle conditions are met, the grille shutter closes in order to improve fuel economy (reduce air resistance) and reduce engine warm up time. |
|
Opening Operation Control |
When the grille shutter is closed and the vehicle conditions are met, the grille shutter opens to ensure radiator and engine cooling air. |
|
Power Switch Off-linked Opening Operation Control |
When the power switch is turned off and the vehicle is stopped with the grille shutter closed, the grille shutter opens. |
|
Winter Control Mode |
During operation in low temperatures when there is a possibility of the grille shutter being stuck due to being frozen, a malfunction judgment is not made even though it is detected that the grille shutter is stuck. |
|
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 |
|---|---|---|---|---|---|---|
|
P059A71 |
Active Grille Air Shutter "A" Actuator Stuck |
A signal from the swing grille actuator assembly indicating that the grille shutter is stuck is detected for 7.86 seconds or more (2 trip detection logic). |
|
|
DTC stored |
|
|
P059A79 |
Active Grille Air Shutter "A" Mechanical Linkage Failure |
A signal from the swing grille actuator assembly indicating a malfunction is detected for 7.86 seconds or more (2 trip detection logic). |
|
|
DTC stored |
|
MONITOR DESCRIPTION
When the swing grille actuator assembly detects that the grille shutter is stuck or there is a malfunction, a DTC request is sent to the ECM and the ECM stores a DTC.
MONITOR STRATEGY
|
Related DTCs |
P059F: Active grille air shutter stuck / lose connection |
|
Required Sensors/Components (Main) |
Swing grille actuator assembly Radiator shutter sub-assembly |
|
Required Sensors/Components (Related) |
- |
|
Frequency of Operation |
Once per driving cycle |
|
Duration |
7.86 seconds |
|
MIL Operation |
2 driving cycles |
|
Sequence of Operation |
None |
TYPICAL ENABLING CONDITIONS
|
Monitor runs whenever the following DTCs are not stored |
None |
|
All of the following conditions are met |
- |
|
Auxiliary battery voltage |
8 V or higher |
|
Time after power switch off to ON |
0.5 seconds or higher |
|
Receive LIN communication signal |
Less than 4.608 seconds |
TYPICAL MALFUNCTION THRESHOLDS
Stuck
|
All of the following conditions are met |
- |
|
Block error signal from the actuator |
Received |
|
Retry number |
8 |
|
Either of the following condition is met |
- |
|
Ambient air temperature |
10°C (14°F) or higher |
|
Engine coolant temperature |
120°C (248°F) or higher |
Lose Connection
|
Both of the following conditions are met |
- |
|
Over travel error signal from the actuator |
Received |
|
Retry number |
8 |
CONFIRMATION DRIVING PATTERN
HINT:
-
After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.
Click here
![2023 - 2025 MY Corolla Corolla HV [09/2022 - ]; 2ZR-FXE (ENGINE CONTROL): SFI SYSTEM: DTC CHECK / CLEAR](/t3Portal/stylegraphics/info.gif)
-
When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
Click here
- 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) [A].
- Turn the Techstream on.
- Enter the following menus: Powertrain / Engine / Utility / Switch Grille Shutter Control Mode [B].
- According to the display on the Techstream, change the grille shutter control mode from normal mode to maintenance mode.
- Enter the following menus: Powertrain / Engine / Utility / Grille Shutter Initialization / Initialization operation (Nominal Torque) [C].
- According to the display on the Techstream, perform initialization.
- Enter the following menus: Powertrain / Engine / Trouble Codes [D].
-
Read the pending DTCs.
HINT:
- If a pending DTC is output, the system is malfunctioning.
- If a pending DTC is not output, perform the following procedure.
- Enter the following menus: Powertrain / Engine / Utility / All Readiness.
- Input the DTC: P059A71 or P059A79.
-
Check the DTC judgment result.
Techstream Display
Description
NORMAL
ABNORMAL
- DTC judgment completed
- System abnormal
INCOMPLETE
- DTC judgment not completed
- Perform driving pattern after confirming DTC enabling conditions
HINT:
- If the judgment result is NORMAL, the system is normal.
- If the judgment result is ABNORMAL, the system has a malfunction.
-
[A] to [D]: Normal judgment procedure.
The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
- When clearing the permanent DTCs, do not disconnect the cable from the auxiliary battery terminal or attempt to clear the DTCs during this procedure, as doing so will clear the universal trip and normal judgment histories.
CAUTION / NOTICE / HINT
NOTICE:
- In order to ensure safety, before performing troubleshooting or removing the swing grille actuator assembly or radiator shutter assembly, change the grille shutter control mode to maintenance mode.
-
Vehicle Control History may be stored in the hybrid vehicle control ECU 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.
(Select Powertrain in Health Check and then check the time stamp data.)
Click here
Click here
-
If any "Engine Malfunction" Vehicle Control History item has been stored in the hybrid vehicle control ECU, 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 GTS. 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 (SWITCH GRILLE SHUTTER CONTROL MODE) |
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine / Utility / Switch Grille Shutter Control Mode.
Powertrain > Engine > Utility
|
Tester Display |
|---|
|
Switch Grille Shutter Control Mode |
(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.
| NG |
|
|
|
3. |
PERFORM UTILITY USING TECHSTREAM (GRILLE SHUTTER INITIALIZATION) |
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine / Utility / Grille Shutter Initialization.
Powertrain > Engine > Utility
|
Tester Display |
|---|
|
Grille Shutter Initialization |
(e) According to the display on the Techstream, perform initialization (nominal torque).
|
|
4. |
CLEAR DTC |
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Turn the Techstream on.
(d) Clear the DTCs.
Powertrain > Engine > Clear DTCs
(e) Turn the power switch off and wait for at least 30 seconds.
|
|
5. |
CHECK DTC OUTPUT (DTC P059A71 OR P059A79) |
(a) Turn the power switch on (IG).
(b) Turn the Techstream on.
(c) Enter the following menus: Powertrain / Engine / Trouble Codes.
(d) Read the DTCs.
Powertrain > Engine > Trouble Codes
|
Result |
Proceed to |
|---|---|
|
DTCs are not output |
A |
|
DTC P059A71 and/or P059A79 is output |
B |
HINT:
Perform "Switch Grille Shutter Control Mode and Grille Shutter Initialization" after replacing the radiator shutter assembly.
Click here
| A |
|
| B |
|
|
6. |
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.
|
|
7. |
CLEAR DTC |
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Turn the Techstream on.
(d) Clear the DTCs.
Powertrain > Engine > Clear DTCs
(e) Turn the power switch off and wait for at least 30 seconds.
|
|
8. |
READ VALUE USING TECHSTREAM (GRILLE SHUTTER CONTROL MODE) |
(a) Turn the power switch on (IG).
(b) Turn the Techstream on.
(c) Enter the following menus: Powertrain / Engine / Utility / Switch Grille Shutter Control Mode.
Powertrain > Engine > Utility
|
Tester Display |
|---|
|
Switch Grille Shutter Control Mode |
(d) According to the display on the Techstream, change the grille shutter control mode from maintenance mode to normal mode.
(e) Enter the following menus: Powertrain / Engine / Data List /Grille Shutter Control Mode.
Powertrain > Engine > Data List
|
Tester Display |
|---|
|
Grille Shutter Control Mode |
(f) Read the value displayed on the Techstream.
Standard:
|
Techstream Display |
Specified Condition |
|---|---|
|
Grille Shutter Control Mode |
Normal |
| NEXT |
|
END |
|
|