Inspection Procedure

1. Clear the DTC (See DIAGNOSIS SYSTEM  )
2. Turn the engine switch on (IG).
3. After 15 seconds have elapsed, check if the trouble occurs again.

   OK: DTC B2275 is not output. 

NG: Go to step 2 

OK: USE SIMULATION METHOD TO CHECK  (See HOW TO PROCEED WITH TROUBLESHOOTING )

1. Disconnect the J55 connector from the power source control ECU
2. Disconnect the A5 connector from the ECM
3. Measure the resistance according to the value (s) in the table below

   Standard Resistance 

   RESISTANCE REFERENCE
   
   

   Tester Connection	Condition	Specified Condition
   J55-39 (STSW) - A5-27 (STSW)	Always	Below 1 Ω
   J55-39 (STSW) or A5-27 (STSW) - Body ground	Always	10 kΩ or higher

Fig 1: Identifying J55 And A5 Connector Terminal
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CONTROL ECU - ECM) 

OK: Go to next Step 

1. Reconnect the J55 connector to the power source control ECU
2. Measure the voltage according to the value (s) in the table below

   Standard Voltage 

   VOLTAGE SPECIFICATION
   
   

   Tester Connection	Condition	Specified Condition
   J55-39 (STSW) - Body ground	Brake pedal depressed, Engine switch hold on (ST)	Output voltage at terminal AM1 or AM2 is -2 V or more

Fig 2: Identifying J55 Connector Terminal
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE POWER SOURCE CONTROL ECU 

OK: REPLACE ECM  (See REMOVAL )