Hybrid Vehicle Control ECU Communication Stop Mode: Procedure

1. Disconnect the A65, A66, D72 and D73 hybrid vehicle control ECU connectors.
   Fig 1: Disconnecting A65, A66 D72 And D73 Hybrid Vehicle Control ECU Connectors

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   TEXT IN ILLUSTRATION
   
   

   *a

   Rear view of wire harness connector (to Hybrid Vehicle Control ECU)

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2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   D72-6 (E1) - Body ground	Always	Below 1 Ω
   D72-5 (E01) - Body ground	Always	Below 1 Ω
   D73-4 (E12) - Body ground	Always	Below 1 Ω
   D73-5 (E02) - Body ground	Always	Below 1 Ω

3. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   D72-1 (BATT) - Body ground	Always	11 to 14 V
   A66-1 (IGSW) - Body ground	Ignition switch ON	11 to 14 V
   A66-5 (+B1) - Body ground	Battery positive (+) voltage applied to terminal A66-6 (MREL)	11 to 14 V
   A65-2 (+B2) - Body ground	Battery positive (+) voltage applied to terminal A66-6 (MREL)	11 to 14 V

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   2