DTC B2286: Runnable Signal Malfunction [09/2015 - ]: Procedure

1. Use the Data List to check if the engine condition is functioning properly.
   MAIN BODY
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Engine Condition	Engine condition/Run or Stop	Run: Engine running Stop: Engine stopped	-

   OK

   When the engine is running, Run is displayed on the Techstream.

Result:  NG

NG 

REPLACE MAIN BODY ECU 

Result:  OK

OK 

See step  2

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the L11 main body ECU connector.
2. Disconnect the A14 ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   L11-8 (TACH) - A14-15 (TACH)	Always	Below 1 Ω
   L11-8 (TACH) or A14-15 (TACH) - Body ground	Always	10 kΩ or higher

Result:  NG

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result:  OK

OK 

See step  3

1. Temporarily replace the main body ECU with a new or normally functioning one.
2. Check that the engine starts normally.

   OK

   Engine starts normally.

Result:  OK

OK 

END (MAIN BODY ECU IS FAULTY) 

Result:  NG

NG 

GO TO SFI SYSTEM 

(Refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2015 - ] )