Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: Active Grille Air Shutter "B" Circuit Short to Battery (P05B112,P05B114,P05B131)

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual / Engine / A25a-fxs Engine Control / Sfi System / Active Grille Air Shutter "B" Circuit Short to Battery (P05B112,P05B114,P05B131)

DESCRIPTION

Refer to DTC P059F73.

Click here

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

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):

  • 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

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):

  • 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

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 (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

  1. 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)

  2. 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

  1. Connect the Techstream to the DLC3.
  2. Turn the power switch on (IG).
  3. Turn the Techstream on.
  4. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
  5. Turn the power switch off and wait for at least 30 seconds.
  6. Turn the power switch on (IG).
  7. Turn the Techstream on.
  8. Enter the following menus: Body Electrical / Grill Shutter / Utility / Grill Shutter Control Mode Switching.
  9. According to the display on the Techstream, change the grille shutter control mode from normal mode to maintenance mode.
  10. 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.
  11. 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.

  12. 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.
  13. 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.

    Click here

    (Select Powertrain in Health Check and then check the time stamp data.)

    Click here

  • 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.

    Click here

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.

NEXT

2.

REPLACE SWING GRILLE ACTUATOR ASSEMBLY

(a) Replace the swing grille actuator assembly.

Click here

NEXT

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.

Click here

(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".

NEXT

END

    Active Grille Air Shutter "A" Circuit Short to Ground (P05A211,P05A212,P05A213)

    Control Module Internal Temperature Sensor "B" Circuit Short to Ground (P06AB11,P06AB15)

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