DTC P05A2-12: Active Grille Air Shutter "A" Circuit Short to Battery [10/2022 - ]: Procedure
WARNING: This page is about a different car, the 2025 Lexus RX 450h+, 2025 Lexus RX 350h, 2024 Lexus RX 450h+, 2024 Lexus RX 350h, and 2023 Lexus RX 350h. However, it is still accessible from the selected car via links, so may be relevant.
- PERFORM UTILITY USING GTS (SWITCH GRILLE SHUTTER CONTROL MODE)
Pre-procedure1
- Turn the ignition switch off and wait for 30 seconds or more.
- According to the display on the GTS, change the grille shutter control mode from normal mode to maintenance mode.
Powertrain > Engine > Utility
Tester Display Switch Grille Shutter Control Mode Result
Proceed to NEXT
Post-procedure1
- None.
Result:
NEXT
See step 2
- PERFORM UTILITY USING GTS (GRILLE SHUTTER INITIALIZATION)
- According to the display on the GTS, perform initialization (nominal torque).
Powertrain > Engine > Utility
Tester Display Grille Shutter Initialization Result
Proceed to NEXT
Result:
NEXT
See step 3
- According to the display on the GTS, perform initialization (nominal torque).
- CLEAR DTC
Pre-procedure1
- None.
Post-procedure1
- Turn the ignition switch off and wait for at least 30 seconds.
Result:
NEXT
See step 4
- CHECK DTC OUTPUT (DTC P05A2-12)
Pre-procedure1
- Turn the ignition switch to ON and wait 10 seconds or more.
- Read the DTCs.
Powertrain > Engine > Trouble Codes
Result
Result Proceed to P05A2-12 is not output A P05A2-12 is output B HINT:
Perform "Switch Grille Shutter Control Mode and Grille Shutter Initialization" after replacing the radiator shutter assembly.
Refer to INITIALIZATION [10/2022 - ]
Post-procedure1
- None.
Result:
B
REPLACE RADIATOR SHUTTER ASSEMBLY. Refer to REMOVAL [10/2022 - ]
Result:
A
See step 5
- READ VALUE USING GTS (GRILLE SHUTTER CONTROL MODE)
Pre-procedure1
- According to the display on the GTS, change the grille shutter control mode from maintenance mode to normal mode.
Powertrain > Engine > Utility
Tester Display Switch Grille Shutter Control Mode
- Read the value displayed on the GTS.
Powertrain > Engine > Data List
Tester Display Grille Shutter Control Mode Standard
GTS Display Specified Condition Grille Shutter Control Mode Normal Result
Proceed to NEXT
Post-procedure1
- None.
Result:
NEXT
END
- According to the display on the GTS, change the grille shutter control mode from maintenance mode to normal mode.