Dtc B2275 Stsw Monitor Malfunction

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

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK DTC OUTPUT

CHECK WIRE HARNESS (MAIN BODY ECU - ECM)

INSPECT MAIN BODY ECU

CHECK MAIN BODY ECU OPERATION

DTC B2275 STSW Monitor Malfunction


DESCRIPTION

This DTC is output when there is an open, short, or any other problem in the engine start request output circuit inside the main body ECU or in the external circuit.
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
B2275
ST output circuit (engine starting request signal circuit) inside main body ECU or other related circuit is malfunctioning
  1. Main body ECU
  2. ECM
  3. Wire harness or connector

WIRING DIAGRAM


Camry. Acv40 Gsv40.2Gr-Fe Starting.Starting System. Dtc B2275 Stsw Monitor Malfunction


INSPECTION PROCEDURE

1.CHECK DTC OUTPUT

  1. Clear the DTCs (CAMRY_ACV40 RM000000YEH05QX.html).

    HINT:
    After all DTCs are cleared, turn the engine switch on (IG) and depress the brake pedal. After 15 seconds have elapsed, check if the trouble occurs again.

  1. Check for DTCs again.

    OK:
    DTC is not output.


NG
Go to step 2
OK

USE SIMULATION METHOD TO CHECK (CAMRY_ACV40 RM000000UZ104DX.html)

2.CHECK WIRE HARNESS (MAIN BODY ECU - ECM)


  1. Disconnect the E9 ECU connector.


    Camry. Acv40 Gsv40.2Gr-Fe Starting.Starting System. Dtc B2275 Stsw Monitor Malfunction

  1. Disconnect the A55*1 or E24*2 ECM connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    E9-4 (STSW) - A55-14 (STSW)*1
    E9-4 (STSW) - A24-14 (STSW)*2
    		Always
    		Below 1 Ω
    E9-4 (STSW) - Body ground
    		Always
    		10 kΩ or higher
    1. *1: for LHD
    2. *2: for RHD


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


3.INSPECT MAIN BODY ECU


    Camry. Acv40 Gsv40.2Gr-Fe Starting.Starting System. Dtc B2275 Stsw Monitor Malfunction

  1. Reconnect the connectors.

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

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    E9-4 (STSW) - Body ground
    		Brake pedal depressed, Engine switch hold on (ST)
    		Output voltage at terminal AM1 or AM2 is -2 V or more.


NG
REPLACE MAIN BODY ECU
OK


4.CHECK MAIN BODY ECU OPERATION

  1. After replacing the main body ECU with a normally functioning ECU, check that the engine can start.

    OK:
    Engine can start normally.


NG
GO TO ENGINE CONTROL SYSTEM
OK

END (MAIN BODY ECU WAS DEFECTIVE)