DTC B2286: Runnable Signal Malfunction (08/2010 - 08/2011): Procedure

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

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

   RESULT
   
   

   Result	Proceed to
   Display on the Techstream does not change according to engine condition	A
   Display on the Techstream changes according to engine condition	B

B → REPLACE MAIN BODY ECU (COWL SIDE JUNCTION BLOCK LH) 

A: Go to next step 

Fig 1: Identifying Main Body ECU Connector And ECM Connector Terminal

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the E3 main body ECU connector.
2. Disconnect the A38 ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   E3-8 (TACH) - A38-15 (TACH)	Always	Below 1 Ω
   E3-8 (TACH) or A38-15 (TACH) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Temporarily replace the main body ECU with a new or normally functioning one.
2. Check whether DTC B2286 is output.

   OK

   No DTC is output.

NG → See step   4 

OK → END