Inspection Procedure

HINT

Check the connector connection to the terminal to make sure that there is no abnormally such as a loose connection, deformations, etc

1. CHECK MULTIPLEX COMMUNICATION SYSTEM 
   1. Clear the DTC (See DIAGNOSIS SYSTEM  )
   2. Check for the multiplex network communication system DTCs.

      HINT

      If the DTCs for the multiplex network communication system malfunction are output, inspect those DTCs first.

      OK: DTC is not output. 

   NG: GO TO MULTIPLEX COMMUNICATION SYSTEM  (See DIAGNOSTIC TROUBLE CODE CHART )

   OK: Go to next Step 

2. CHECK CAN COMMUNICATION SYSTEM 
   1. Clear the DTC (See DIAGNOSIS SYSTEM  ).
   2. Check for the CAN communication system DTC

      HINT

      If the DTCs for the CAN communication system malfunction are output, inspect those DTCs first.

      OK: DTC is not output. 

   NG: GO TO CAN COMMUNICATION SYSTEM  (See HOW TO PROCEED WITH TROUBLESHOOTING )

   OK: Go to next Step 

3. READ VALUE USING TECHSTREAM 
   1. Connect the Techstream to the DLC3
   2. Turn the engine switch on (IG)
   3. Check the Data List for proper functioning of the engine running

      Power Source Control 

      ITEM RANGE REFERENCE
      
      

      Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
      Engine Condition	Engine condition/STOP or RUN	STOP Engine is stopped RUN Engine is running	-

      OK: STOP (engine is stopped) and RUN (engine is running) appear on the screen. 

   NG: Go to step  6

   OK: Go to next Step 

4. REPLACE POWER SOURCE CONTROL ECU 
   1. Replace the power source control ECU
5. CHECK FOR DTC 
   1. Clear the DTC
   2. Check for DTC B2286 is output

      OK: DTC B2286 is not output. 

   NG: REPLACE ECM  (See REMOVAL )

   OK: END (POWER SOURCE CONTROL ECU IS DEFECTIVE) 

6. CHECK HARNESS AND CONNECTOR (POWER SOURCE CONTROL ECU - ECM) 
   1. Disconnect the J55 connector from power source control ECU
   2. Disconnect the A5 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
      J55-2 (TACH) - A5-15 (TACH)	Always	Below 1 Ω
      J55-2 (TACH) or A5-15 (TACH) - 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 

7. REPLACE POWER SOURCE CONTROL ECU 
   1. Replace the power source control ECU.
8. CHECK FOR DTC 
   1. Clear the DTC
   2. Check for DTC B2286 is output

      OK: DTC B2286 is not output. 

   NG: REPLACE ECM  (See REMOVAL )

   OK: END (POWER SOURCE CONTROL ECU IS DEFECTIVE)