DTC B2275: STSW Monitor Malfunction: Procedure

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

   Display (DTC output)	Proceed to
   B2275	A
   No DTC output	B

B → See step   5 

A: Go to next step 

Fig 1: Identifying A68 Main Body ECU And A76 Hybrid Vehicle Control ECU Connector Terminal

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the A68 main body ECU connector.
2. Disconnect the A76 hybrid vehicle control ECU connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   A68-4 (STSW) - A76-28 (ST2)	Always	Below 1 Ω
   A68-4 (STSW) or A76-28 (ST2) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

Fig 2: Identifying A68 Main Body ECU Connector Terminal

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 power switch is turned ON (READY).

   Standard voltage

   Tester Connection	Condition	Specified Condition
   A68-4 (STSW) - Body ground	Brake pedal depressed with shift lever in P, power switch pushed once	11 to 14 V

NG → REPLACE MAIN BODY ECU 

OK → See step   4