Lexus ES: Active Grille Air Shutter "A" Actuator Slipping (P05A074)
DESCRIPTION
Refer to DTC P059F73.
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| 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):
|
| 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 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 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 |
| 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
- 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).
- Turn the Techstream on.
- Enter the following menus: Body Electrical / Grill Shutter / Utility / Grill Shutter Control Mode Switching.
- According to the display on the Techstream, change the grille shutter control mode from normal mode to maintenance mode.
- 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.
-
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.
- 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.
-
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.
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(Select Powertrain in Health Check and then check the time stamp data.)
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-
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.
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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.
|
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| 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.
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| OK | .gif) | REPLACE SWING GRILLE ACTUATOR ASSEMBLY |
|
| 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.
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(b) Remove the swing grille actuator assembly.
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(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.
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| A | | REPLACE SWING GRILLE ACTUATOR ASSEMBLY |
| B | | REPLACE RADIATOR SHUTTER SUB-ASSEMBLY |
|
| 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.
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(b) Remove the swing grille actuator assembly.
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(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| z23-2 (SEN-1) - A57-1 (GND) | Grille shutter fully closed | Below 1 Ω |
| Grille shutter in any position other than fully closed | 10 kΩ or higher | |
| z23-4 (SEN-2) - A57-1 (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 |
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