2ZR-FXE (ENGINE CONTROL): SFI SYSTEM: P05B112,P05B114,P05B131; Active Grille Air Shutter "B" Circuit Short to Battery; 2020 MY Corolla Corolla HV [01/2019

Last Modified: 07-31-2024	6.11:8.1.0	Doc ID: RM100000001GJ6N
Model Year Start: 2020	Model: Corolla	Prod Date Range: [01/2019 - 04/2020]
Title: 2ZR-FXE (ENGINE CONTROL): SFI SYSTEM: P05B112,P05B114,P05B131; Active Grille Air Shutter "B" Circuit Short to Battery; 2020 MY Corolla Corolla HV [01/2019 - 04/2020]

DTC

P05B112

Active Grille Air Shutter "B" Circuit Short to Battery

DTC

P05B114

Active Grille Air Shutter "B" Circuit Short to Ground or Open

DTC

P05B131

Active Grille Air Shutter "B" No Signal

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): The auxiliary battery voltage is 10.5 to 16 V. Grille shutter opening or closing operation is being performed. The Hall IC1 signal or Hall IC2 signal is stuck on the high side when the other signal is received normally.	Swing grille actuator assembly	Comes on / Does not come on	DTC stored	SAE Code: P05B3 DTC for Mexico Models: Applies
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): The auxiliary battery voltage is 10.5 to 16 V. Grille shutter opening or closing operation is being performed. The Hall IC1 signal or Hall IC2 signal is stuck on the low side when the other signal is received normally.	Swing grille actuator assembly	Comes on / Does not come on	DTC stored	SAE Code: P05B4 DTC for Mexico Models: Applies
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): Grille shutter opening or closing operation is being performed. The Hall IC1 signal and Hall IC2 signal are not received while the grille shutter motor (swing grille actuator assembly) is operating.	Swing grille actuator assembly	Comes on / Does not come on	DTC stored	SAE Code: P05B2 DTC for Mexico Models: Applies

HINT:

*: For every 65 ms that the ECM receives a grille shutter system malfunction signal from the grille shutter ECU (swing grille actuator assembly) 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

Hall IC Signal Malfunction

If the grille shutter ECU (swing grille actuator assembly) 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.

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)

Hall IC Signal Reception Malfunction

If the grille shutter ECU (swing grille actuator assembly) 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

P05B3, P05B4

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

P05B3

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

P05B4

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 / 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.

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).

(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.

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).

(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".

END