Inspection Procedure

1. Use the Data List to check if the hybrid control system start request signal is functioning properly
   1. Intelligent tester

      MAIN BODY 

      DATA LIST - MAIN BODY
      
      

      Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
      READY SIG	Hybrid control system start request signal monitor/ON or OFF	ON: System (READY) is ON OFF: System (READY) is OFF	Power switch pressed and held with shift lever in P

   2. Techstream

      MAIN BODY 

      DATA LIST - MAIN BODY
      
      

      Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
      Ready Signal	Hybrid control system start request signal monitor/ON or OFF	ON: System (READY) is ON OFF: System (READY) is OFF	Power switch pressed and held with shift lever in P

      Result 

      RESULT REFERENCE
      
      

      Result	Proceed to
      Display on tester does not change according to power switch condition	A
      Display on tester changes according to power switch condition	B

B: REPLACE MAIN BODY ECU 

A: Go to next Step 

Fig 1: Identifying L11 Main Body ECU And A76 Hybrid Vehicle Control ECU Connectors

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the L11 main body ECU connector
2. Disconnect the A76 hybrid vehicle control 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
   L11-8 (RDY) - A76-29 (RDY)	Always	Below 1 Ω
   L11-8 (RDY) or A76-29 (RDY) - 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 recurs

   OK: No DTC is output. 

NG: REPLACE HYBRID VEHICLE CONTROL ECU  (See HYBRID VEHICLE CONTROL ECU )

OK: END (MAIN BODY ECU IS FAULTY)