Lexus ES: Active Grille Air Shutter "B" Circuit Short to Battery (P05B112,P05B114,P05B131)
DESCRIPTION
Refer to DTC P059F73.
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| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Memory | Note |
|---|---|---|---|---|---|---|
| P05B112 | Active Grille Air Shutter "B" Circuit Short to Battery | All of the following conditions are met and the ECM receives a malfunction signal 17 times* (1 trip detection logic):
| Swing grille actuator assembly | Comes on | DTC stored | SAE Code: P05B3 |
| P05B114 | Active Grille Air Shutter "B" Circuit Short to Ground or Open | All of the following conditions are met and the ECM receives a malfunction signal 17 times* (1 trip detection logic):
| Swing grille actuator assembly | Comes on | DTC stored | SAE Code: P05B4 |
| P05B131 | Active Grille Air Shutter "B" No Signal | Both of the following conditions are met and the ECM receives a malfunction signal 17 times* (2 trip detection logic):
| Swing grille actuator assembly | Comes on | DTC stored | SAE Code: P05B2 |
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
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Hall IC Signal Malfunction
If the grille shutter ECU detects a stuck high or stuck low signal from either hall IC1 or hall IC2, it will output a malfunction signal to the ECM and the ECM will store a DTC.
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Detection Condition
DTC No.
Short to +B (Stuck High)
P05B112 (Active Grille Air Shutter "B" Circuit Short to Battery)
Open or Short to Ground (Stuck Low)
P05B114 (Active Grille Air Shutter "B" Circuit Short to Ground or Open)
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Hall IC Signal Reception Malfunction
If the grille shutter ECU detects a stuck high or stuck low signal from both hall IC1 and hall IC2, it will output a malfunction signal to the ECM and the ECM will store a DTC.
Detection Condition
DTC No.
Abnormal Signal (Hall IC1 and Hall IC2)
P05B131 (Active Grille Air Shutter "B" No Signal)
MONITOR STRATEGY
| Related DTCs | P05B2: Active grille air shutter rationality P05B3: Active grille air shutter range check (high voltage) P05B4: Active grille air shutter range check (low voltage) |
| Required Sensors/Components (Main) | Swing grille actuator assembly |
| Required Sensors/Components (Related) | - |
| Frequency of Operation | Continuous |
| Duration | 17 times |
| MIL Operation | P05B2: 2 driving cycles P05B3, P05B4: Immediate |
| Sequence of Operation | None |
TYPICAL ENABLING CONDITIONS
P05B2| 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) | Met |
| One of the following conditions is met | (a), (b) or (c) |
| (a). Number of active grille air shutter motor speed sensor 1 signal pulse | 1 time or more |
| (b). Time after active grille air shutter open control is operated | 0.61 seconds or more |
| (c). Time after active grille air shutter close control is operated | 0.61 seconds or more |
| 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 open active grille air shutter | On |
| 2. Command to close active grille air shutter | On |
| *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
P05B2| Number of active grille air shutter motor speed sensor 1 signal pulse | Less than 1 time |
| Either of the following conditions is met | 1 or 2 |
| 1. Both of the following conditions are met | - |
| Number of active grille air shutter motor speed sensor 1 signal pulse | Several |
| Active grille air shutter motor speed sensor 2 terminal voltage level | High |
| 2. Both of the following conditions are met | - |
| Number of active grille air shutter motor speed sensor 2 signal pulse | Several |
| Active grille air shutter motor speed sensor 1 terminal voltage level | High |
| Either of the following conditions is met | 1 or 2 |
| 1. Both of the following conditions are met | - |
| Number of active grille air shutter motor speed sensor 1 signal pulse | Several |
| Active grille air shutter motor speed sensor 2 terminal voltage level | Low |
| 2. Both of the following conditions are met | - |
| Number of active grille air shutter motor speed sensor 2 signal pulse | Several |
| Active grille air shutter motor speed sensor 1 terminal voltage level | Low |
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.
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. | REPLACE SWING GRILLE ACTUATOR ASSEMBLY |
(a) Replace the swing grille actuator assembly.
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|
| 3. | PERFORM UTILITY USING TECHSTREAM (GRILL SHUTTER CONTROL MODE SWITCHING AND GRILL SHUTTER INITIALIZATION) |
HINT:
When changing the grille shutter control mode and/or performing initialization by driving the vehicle, the grille shutter control mode can only be changed and initialization can only be performed if the grille shutter system is in maintenance mode.
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(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 maintenance mode to normal mode.
(f) Enter the following menus: Body Electrical / Grill Shutter / Utility / Grill Shutter Initialization.
Body Electrical > Grill Shutter > Utility| Tester Display |
|---|
| Grill Shutter Initialization |
(g) According to the display on the Techstream, perform Grill Shutter Initialization.
(h) Enter the following menus: Body Electrical / Grill Shutter / Data List / Shutter Control State and Shutter Initialization.
Body Electrical > Grill Shutter > Data List| Tester Display |
|---|
| Shutter Control State |
| Shutter Initialization |
(i) According to the display on the Techstream, read the Data List and check that the value of Shutter Control State is "Normal" and Shutter Initialization is "Complete".
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