Dtc B2274 Acc Monitor Malfunction. Corolla Auris

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

READ VALUE OF INTELLIGENT TESTER

CHECK ENGINE SWITCH CONDITION

INSPECT RELAY (ACC RELAY)

CHECK HARNESS AND CONNECTOR (ACC RELAY - MAIN BODY ECU)

CHECK HARNESS AND CONNECTOR (RELAY BLOCK NO. 5 - BATTERY AND BODY GROUND)

DESCRIPTION

УКАЗАНИЕ:

When the main body ECU is replaced with a new one and the negative (-) battery terminal is connected, the power source mode becomes the IG-ON mode. When the battery is removed and reinstalled, the power source mode that was selected when the battery was removed is restored.

After the main body ECU is replaced, perform the registration procedures for the engine immobiliser system.

WIRING DIAGRAM

INSPECTION PROCEDURE

1. Connect the intelligent tester to the DLC3.
   

2. Turn the engine switch on (IG) and turn the intelligent tester main switch on.
   

3. Read the Data List according to the displays on the tester.
   

   УКАЗАНИЕ:

   When using the intelligent tester with the engine switch off, turn on and off any of the door courtesy light switches repeatedly at 1.5 second intervals or less until communication between the tester and vehicle starts.

   
   

   Body:

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   ACC Relay Mon	Status of ACC Relay Monitor / ON or OFF	ON: Engine switch on (ACC) OFF: Engine switch off	-

   OK:

   "ON" (engine switch on (ACC)) appears on the screen.
   

1. Check the power source mode changes.
   

   1. When the key is inside the vehicle, check that pressing the engine switch causes the power source mode to change as follows:
      

      OK:

      off → on (ACC) → on (IG) → off
      

      УКАЗАНИЕ:

      1. If power source mode does not change to ON (IG and ACC) (See page Нажмите здесь).
         
      2. If power source mode does not change to ON (IG) (See page Нажмите здесь).
         
      3. If power source mode does not change to ON (ACC) (See page Нажмите здесь).
         

1. Remove the ACC relay from the relay block No. 5.
   

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

   Standard resistance:

   Tester Connection	Condition	Specified Condition
   3 - 5	When battery voltage is not applied to terminals 1 and 2	10 kΩ or higher
   3 - 5	When battery voltage is applied to terminals 1 and 2	Below 1 Ω

1. Disconnect the E50 ECU connector.
   

   
   
   
   

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

   Standard resistance:

   Tester Connection	Condition	Specified Condition
   Relay block No. 5 ACC relay terminal 1 - E50-4 (ACCD)	Always	Below 1 Ω
   E50-4 (ACCD) or Relay block No. 5 ACC relay terminal 1 - Body ground	Always	10 kΩ or higher

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

   Standard resistance:

   Tester Connection	Condition	Specified Condition
   Relay block No. 5 ACC relay terminal 2 - Body ground	Always	Below 1 Ω

2. Measure the voltage according to the value(s) in the table below.
   

   Standard voltage:

   Tester Connection	Condition	Specified Condition
   Relay block No. 5 ACC relay terminal 3 - Body ground	Always	11 to 14 V