DTC B2275: STSW Monitor Malfunction: Procedure

1. Delete the DTCs, refer to DTC CHECK / CLEAR .

   HINT: 

   After all DTCs are cleared, turn the engine switch on (IG) and depress the brake pedal. After 15 seconds have elapsed, check if the trouble occurs again.

2. Check for DTCs again.

   OK

   No DTC is output.

NG → See step   2 

OK → See step   5 

1. Disconnect the D10 ECU connector.
2. Disconnect the D60 ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   D10-4 (STSW) - D60-30 (STSW)	Always	Below 1 Ω
   D10-4 (STSW) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Reconnect the D10 connector.
   Fig 1: Identifying Connector Connection Condition (Main Body ECU Connector)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the voltage according to the value(s) in the table below.

   Standard voltage

   Tester Connection	Condition	Specified Condition
   D10-4 (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 → See step   4