Dtc B2273 Ignition 2 Monitor Malfunction

Engine. Camry. Acv40 Gsv40
2Gr-Fe Starting. Camry. Acv40 Gsv40

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

READ VALUE USING INTELLIGENT TESTER

CHECK ENGINE SWITCH CONDITION

INSPECT RELAY (IG2 RELAY)

CHECK WIRE HARNESS (ENGINE ROOM R/B - MAIN BODY ECU AND BODY GROUND)

DTC B2273 Ignition 2 Monitor Malfunction


DESCRIPTION

This DTC is output when there is a problem in the IG2D output circuit, which is from the inside of the main body ECU to the IG2 relay.
HINT:
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.

DTC No.
DTC Detection Condition
Trouble Area
B2273
IG2 relay actuation circuit inside main body ECU or other related circuit is malfunctioning
  1. Main body ECU
  2. IG2 relay
  3. Wire harness or connector

WIRING DIAGRAM


Camry. Acv40 Gsv40.2Gr-Fe Starting.Starting System. Dtc B2273 Ignition 2 Monitor Malfunction


INSPECTION PROCEDURE

1.READ VALUE USING INTELLIGENT TESTER

  1. Connect the intelligent tester to the DLC3.

  1. Turn the engine switch on (IG).

  1. Turn the intelligent tester on.

  1. Enter the following menus: Body / Body / Data List.

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

    HINT:
    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 Mon 1
    		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.


NG
Go to step 3
OK


2.CHECK ENGINE SWITCH CONDITION

  1. Check the power source mode change.

    1. 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:

      OK:
      off → on (ACC) → on (IG) → off
      HINT:
      1. If power mode does not change to ON (IG and ACC) (CAMRY_ACV40 RM0000020S903IX.html).
      2. If power mode does not change to ON (IG) (CAMRY_ACV40 RM0000020SA027X.html).
      3. If power mode does not change to ON (ACC) (CAMRY_ACV40 RM0000020SB027X.html).


NG
GO TO OTHER PROBLEM
OK


3.INSPECT RELAY (IG2 RELAY)


    Camry. Acv40 Gsv40.2Gr-Fe Starting.Starting System. Dtc B2273 Ignition 2 Monitor Malfunction

  1. Remove the IG2 relay from the engine room R/B.

  1. 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


NG
REPLACE RELAY
OK


4.CHECK WIRE HARNESS (ENGINE ROOM R/B - MAIN BODY ECU AND BODY GROUND)


  1. Remove the IG2 relay from the engine room R/B.


    Camry. Acv40 Gsv40.2Gr-Fe Starting.Starting System. Dtc B2273 Ignition 2 Monitor Malfunction

  1. Disconnect the E6 ECU connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    Engine Room R/B IG2 relay terminal 1 - E6-11 (IG2D)
    		Always
    		Below 1 Ω
    Engine Room R/B IG2 relay terminal 2 - Body ground
    		Always
    		Below 1 Ω
    E6-11 (IG2D) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE MAIN BODY ECU