Inspection Procedure

1. Clear the DTC (See DIAGNOSIS SYSTEM  )
2. Turn the engine switch on (IG).
3. After 50 seconds have elapsed, check if the trouble occurs again

   OK: DTC B2276 is output. 

NG: Go to step 2 

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

1. Disconnect the J55 connector from power source control ECU
   Fig 1: Identifying J55 And A6 Connector Terminal

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the A6 connector from ECM
3. Measure the resistance according to the value (s) in the table below

   Standard Resistance 

   RESISTANCE REFERENCE
   
   

   Tester Connection	Condition	Specified Condition
   J55-31 (CTSW) - A6-19 (ACCR)	Always	Below 1 Ω
   J55-31 (CTSW) or A6-19 (ACCR) - Body ground	Always	10 kΩ or higher

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. Reconnect the A6 connector to the ECM.
3. Measure the voltage according to the value (s) in the table below.

   Standard Voltage 

   VOLTAGE SPECIFICATION
   
   

   Tester Connection	Condition	Specified Condition
   J55-31 (CTSW) - Body ground	Brake pedal depressed, shift lever in P, engine switch is pushed once → on (IG)	0 1 to 0 8 V*1 → output voltage at terminal AM1 or AM" is -2 V or more.
   HINT *1: Voltage is output only when the engine is cranking

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

NG: REPLACE ECM  (See REMOVAL )

OK: REPLACE POWER SOURCE CONTROL ECU