DSD Information System
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] >> Description

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]: Description

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

Refer to DTC P059F-73.

Refer to DESCRIPTION

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory Note
P05B1-12 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
P05B1-14 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
P05B1-31 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.

Diesel-Data.com