DTC P15AD-87: Active Grille Air Shutter "A" Missing Message [12/2021 - ]: Procedure

1. According to the display on the Techstream, 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

Result: 

NEXT 

See step  2

1. Disconnect the swing grille actuator assembly connector.
2. Disconnect the ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A108-2 (LIN) - C40-62 (LIN)	Always	Below 1 Ω
   A108-2 (LIN) or C40-62 (LIN) - Body ground and other terminals	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  3

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the swing grille actuator assembly connector.
2. Turn the ignition switch to ON.
3. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   A108-1 (+B) - A108-3 (GND)	Ignition switch ON	11 to 14 V

   HINT: 

   Perform "Switch Grille Shutter Control Mode and Grille Shutter Initialization" after replacing the radiator shutter assembly.

   Refer to INITIALIZATION [12/2021 - ]

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE RADIATOR SHUTTER ASSEMBLY. Refer to  REMOVAL [12/2021 - ] 

Result: 

NG 

See step  4

1. Disconnect the swing grille actuator assembly connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A108-3 (GND) - Body ground	Always	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  5

1. Disconnect the swing grille actuator assembly connector.
2. Remove the EFI-MAIN NO. 1, VVT, EFI-MAIN NO. 2 and EFI-MAIN NO. 3 relays from the No. 1 engine room relay block and junction block assembly.

   HINT: 

   Remove the VVT, EFI-MAIN NO. 2 and EFI-MAIN NO. 3 relays connected between the checked terminals as the coil inside the relay influences the measurement value.

3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A108-1 (+B) - 5 (EFI-MAIN NO. 1 Relay)	Always	Below 1 Ω
   A108-1 (+B) or 5 (EFI-MAIN NO. 1 Relay) - Body ground and other terminals	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  6

1. Check the ECM power source circuit.

   Refer to ECM Power Source Circuit [08/2020 - ]

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  7

1. According to the display on the Techstream, change the grille shutter control mode from maintenance mode to normal mode.

   Powertrain > Engine > Utility 

   Tester Display
   Switch Grille Shutter Control Mode

2. Read the value displayed on the Techstream.

   Powertrain > Engine > Data List 

   Tester Display
   Grille Shutter Control Mode

   Standard

   Techstream Display	Specified Condition
   Grille Shutter Control Mode	Normal

   Result

   Proceed to
   NEXT

Result: 

NEXT 

END