Dtc B2275 Stsw Monitor Malfunction

Vehicle Interior. Corolla. Zre142 Aze141
Theft Deterrent Keyless Entry. Corolla. Zre142 Aze141

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK FOR DTC

CHECK HARNESS AND CONNECTOR (MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK) - ECM)

INSPECT MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)

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 (instrument panel junction block) or in the external circuit.
HINT:
When the main body ECU (instrument panel junction block) is replaced with a new one and the cable from 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 (instrument panel junction block) is replaced, perform the registration procedures for the engine immobiliser system (COROLLA_ZRE142 RM000000QYF05AX.html).

DTC No.
DTC Detection Condition
Trouble Area
B2275
STSW output circuit (engine starting request signal circuit) inside main body ECU (instrument panel junction block) or other related circuit is malfunctioning
  1. Main body ECU (instrument panel junction block)
  2. ECM
  3. Wire harness or connector

WIRING DIAGRAM


Corolla. Zre142 Aze141.Theft Deterrent Keyless Entry.Smart Key System (For Entry Function). Dtc B2275 Stsw Monitor Malfunction


INSPECTION PROCEDURE

1.CHECK FOR DTC

  1. Clear the DTC (COROLLA_ZRE142 RM000000YEH0CGX.html).

  1. Turn the engine switch on (IG).

  1. After 15 seconds have elapsed, check if the trouble occurs again.

    OK:
    DTC B2273 is not output.


NG
Go to step 2
OK

USE SIMULATION METHOD TO CHECK (COROLLA_ZRE142 RM000000UZ108OX.html)

2.CHECK HARNESS AND CONNECTOR (MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK) - ECM)


  1. Disconnect the E52 ECU connector.


    Corolla. Zre142 Aze141.Theft Deterrent Keyless Entry.Smart Key System (For Entry Function). Dtc B2275 Stsw Monitor Malfunction

  1. Disconnect the A50 ECM connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    E52-4 (STSW) - A50-14 (STSW)
    		Always
    		Below 1 Ω
    E52-4 (STSW) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK) - ECM)
OK


3.INSPECT MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)


    Corolla. Zre142 Aze141.Theft Deterrent Keyless Entry.Smart Key System (For Entry Function). Dtc B2275 Stsw Monitor Malfunction

  1. Reconnect the E52 connector.

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

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    E52-4 (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 (INSTRUMENT PANEL JUNCTION BLOCK)
OK

REPLACE ECM (COROLLA_ZRE142 RM000001CN0030X.html)