DTC B2275: STSW Monitor Malfunction (08/2010 - 08/2011): Procedure

1. Clear the DTCs. Refer to DTC CHECK / CLEAR .
2. Depress the brake pedal with the engine switch on (IG), wait at least 15 seconds, and check whether DTC B2275 is output.
   RESULT
   
   

   Result	Proceed to
   DTC B2275 output	A
   No DTC output	B

B → See step   5 

A: Go to next step 

Fig 1: Identifying Main Body ECU Connector And ECM Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the E4 main body ECU connector.
2. Disconnect the A38 ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   E4-4 (STSW) - A38-14 (STSW)	Always	Below 1 Ω
   E4-4 (STSW) or A38-14 (STSW) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

Fig 2: Identifying Main Body ECU Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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
   E4-4 (STSW) - Body ground	Brake pedal depressed with shift lever in P, engine switch pushed once	11 to 14 V

NG → REPLACE MAIN BODY ECU (COWL SIDE JUNCTION BLOCK LH) 

OK → See step   4