Dtc B2275 Stsw Monitor Malfunction

Engine. Lexus Gs430, Gs300. Uzs190 Grs190
3Uz-Fe Starting. Lexus Gs430, Gs300. Uzs190 Grs190

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK WIRE HARNESS (POWER SOURCE CONTROL ECU - ECM)

CHECK POWER SOURCE CONTROL ECU

DTC B2275 STSW Monitor Malfunction


DESCRIPTION

This DTC is output when the ST output circuits inside the power source control ECU are open or short.

DTC No.
DTC Detection Condition
Trouble Area
B2275
ST output circuit inside power source control ECU or other related circuit is malfunctioning
  1. Power source control ECU
  1. SFI system
  1. Wire harness

WIRING DIAGRAM


Lexus Gs430, Gs300. Uzs190 Grs190.3Uz-Fe Starting.Starting System. Dtc B2275 Stsw Monitor Malfunction


INSPECTION PROCEDURE

1.CHECK WIRE HARNESS (POWER SOURCE CONTROL ECU - ECM)


    Lexus Gs430, Gs300. Uzs190 Grs190.3Uz-Fe Starting.Starting System. Dtc B2275 Stsw Monitor Malfunction

  1. Disconnect the L73 ECU connector.

  1. Disconnect the A6 ECM connector.

  1. Measure the resistance of the wire harness side connectors.

    Standard resistance:
    Tester Connection
    		Specified Condition
    L73-39 (STSW) - A6-19 (STSW)
    		Below 1 Ω
    L73-39 (STSW) or A6-19 (STSW) - Body ground
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK


2.CHECK POWER SOURCE CONTROL ECU

  1. Temporarily replace the power source control ECU with a new or normally functioning one.

  1. Check that the engine starts normally.

    OK:
    Engine starts normally.


NG
GO TO SFI SYSTEM
OK

END (POWER SOURCE CONTROL ECU IS FAULTY)