Dtc B2273 Ignition 2 Monitor Malfunction. Corolla Auris

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

INSPECT FUSE

READ VALUE OF INTELLIGENT TESTER

CHECK ENGINE SWITCH CONDITION

CHECK HARNESS AND CONNECTOR (ENGINE ROOM JUNCTION BLOCK - MAIN BODY ECU AND BODY GROUND)

INSPECT ENGINE ROOM JUNCTION BLOCK (IG2 RELAY)

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. Remove the IG2 and IG2 NO. 2 fuse from the engine room junction block.
   

2. Measure the resistance of the fuse.
   

   Standard resistance:

   Below 1 Ω
   

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
   IG2 Relay Mon1	Status of IG2 relay monitor (outer) / ON or OFF	ON: Engine switch on (IG) (IG2 relay is ON) OFF: Engine switch off (IG2 relay is OFF)	-

   OK:

   "ON" (Engine switch on (IG)) appears on the screen.
   

1. Check the power source mode changes.
   

   1. for AT:
      When the key is inside the vehicle and the shift lever is in the P position, check that pressing the engine switch causes the power source mode to change as follows:
      

   2. for MT:
      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. Disconnect the 1A connector from the engine room junction block.
   

   
   
   
   

2. Disconnect the E51 ECU connector.
   

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

   Standard resistance:

   Tester Connection	Condition	Specified Condition
   1A-2 - E51-5 (IG2D)	Always	Below 1 Ω
   1A-2 - Body ground	Always	10 kΩ or higher
   1A-3 - Body ground	Always	Below 1 Ω

1. Disconnect the 1E connector from the engine room relay block.
   

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

   Standard resistance:

   Tester Connection	Condition	Specified Condition
   1A-4 - 1E-1	When battery voltage is not applied to terminals 1A-3 and 1A-2	10 kΩ or higher
   1A-4 - 1E-1	When battery voltage is applied to terminals 1A-3 and 1A-2	Below 1 Ω