Inspection Procedure

1. Clear the DTCs (see DTC CHECK / CLEAR  ).
2. Check whether DTC B2289 recurs.

   Result 

   DTC OUTPUT CHART
   
   

   Display (DTC output)	Proceed to
   B2289	A
   No DTC output	B

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

A: Go to next Step 

Fig 1: Identifying DA Main Body ECU And L15 Certification ECU Connectors

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the DA main body ECU connector.
2. Disconnect the L15 certification ECU connector
3. Measure the resistance according to the value (s) in the table below

   Standard resistance 

   STANDARD RESISTANCE SPECIFICATION
   
   

   Tester Connection	Condition	Specified Condition
   DA-52 (LIN1) - L15-10 (LIN)	Always	Below 1 Ω
   DA-52 (LIN1) or L15-10 (LIN) - 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 B2289 recurs.

   OK: No DTC is output. 

NG: Go to SMART ACCESS SYSTEM WITH PUSH-BUTTON START  , (See ROOM OSCILLATOR DOES NOT RECOGNIZE KEY )

OK: END (MAIN BODY ECU IS FAULTY)