DTC B2275: STSW Monitor Malfunction: Procedure

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (AUXILIARY BATTERY - POWER MANAGEMENT CONTROL ECU) 

OK: Go to next step 

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER MANAGEMENT CONTROL ECU - BODY GROUND) 

OK: Go to next step 

1. Disconnect the C28 connector from the hybrid vehicle control ECU.
2. Disconnect the F51 connector from the power management control ECU.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   C28-2 (ST2) - F51-7 (ST2)	Always	Below 1 Ω
   C28-2 (ST2) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER MANAGEMENT CONTROL ECU - HYBRID VEHICLE CONTROL ECU) 

OK: Go to next step 

1. Reconnect the F51 connector to the power management control ECU.
   Fig 1: Identifying F51 Connector Terminal

   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
   F51-7 (ST2) - Body ground	With brake pedal depressed, power switch is pressed and held for 3 seconds and then released.	Output voltage at terminal AM21 or AM22 is -2 V or more

   TEXT IN ILLUSTRATION
   
   

   *1	Component with harness connected (Power Management Control ECU)

NG → See step   5 

OK → See step   6