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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 86 (Engine Control System (A25A-FXS) - Diagnostic Codes (P05B1-06DA)) >> SFI System >> DTC P05B1-12: Active Grille Air Shutter "B" Circuit Short to Battery; DTC P05B1-14: Active Grille Air Shutter "B" Circuit Short to Ground or Open; DTC P05B1-31: Active Grille Air Shutter "B" No Signal [12/2019 - 10/2021] >> Typical Enabling Conditions

Typical Enabling Conditions

WARNING: This page is about a different variant/trim than selected.
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