Dtc B2275 Stsw Monitor Malfunction

Engine. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35
2Az-Fe Starting. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK WHETHER DTC OUTPUT RECURS

CHECK MAIN BODY ECU (STSW VOLTAGE)

CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - ECM)

CHECK WHETHER ENGINE STARTS

DTC B2275 STSW Monitor Malfunction


DESCRIPTION

This DTC is stored when the engine start request signal circuit inside the main body ECU is open or shorted.

DTC Code
DTC Detection Condition
Trouble Area
B2275
Engine start request signal circuit inside the main body ECU or other related circuit is malfunctioning.
  1. Main body ECU
  2. SFI system
  3. Harness or connector

WIRING DIAGRAM


Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.2Az-Fe Starting.Starting System (W/ Entry And Start System). Dtc B2275 Stsw Monitor Malfunction


INSPECTION PROCEDURE

1.CHECK WHETHER DTC OUTPUT RECURS

  1. Connect the intelligent tester to the DLC3.

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

  1. Enter the following menus: Body / Main Body / DTC.

  1. Clear the DTCs.

  1. Depress the brake pedal with the engine switch on (IG), wait at least 15 seconds, and check whether DTC B2275 recurs.

    Result
    Result
    		Proceed to
    B2275
    		A
    No DTC output
    		B


B
USE SIMULATION METHOD TO CHECK (RAV4_ACA30 RM000000UZ306OX.html)
A


2.CHECK MAIN BODY ECU (STSW VOLTAGE)


    Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.2Az-Fe Starting.Starting System (W/ Entry And Start System). Dtc B2275 Stsw Monitor Malfunction

  1. Disconnect the E20 main body ECU connector.

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

    HINT:
    The voltage is generated at terminal STSW for 0.3 seconds when the engine cranks.
    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    E20-4 (STSW) - Body ground
    		Brake pedal depressed with shift lever in P or N and engine switch pushed once
    		11 to 14 V


NG
Go to step 4
OK


3.CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - ECM)


    Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.2Az-Fe Starting.Starting System (W/ Entry And Start System). Dtc B2275 Stsw Monitor Malfunction

  1. Disconnect the E20 main body ECU connector.

  1. Disconnect the A12 ECM connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    E20-4 (STSW) - A12-14 (STSW)
    		Always
    		Below 1 Ω
    E20-4 (STSW) or A12-14 (STSW) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


4.CHECK WHETHER ENGINE STARTS

  1. Temporarily replace the main body ECU (instrument panel junction block) with a new or normally functioning one.

  1. Check that the engine starts normally.

    OK:
    Engine starts normally.


NG
GO TO SFI SYSTEM (RAV4_ACA30 RM000000PD90A0X.html)
OK

END (MAIN BODY ECU IS DEFECTIVE)