DTC B2286: Runnable Signal Malfunction: Procedure

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (AUXILIARY BATTERY - POWER MANAGEMENT CONTROL ECU) 

OK: Go to next step 

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER MANAGEMENT CONTROL ECU - BODY GROUND) 

OK: Go to next step 

1. Disconnect the F51 connector from the power management control ECU.
2. Disconnect the C28 connector from the hybrid vehicle control ECU.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   F51-12 (RDY) - C28-9 (RDY)	Always	Below 1 Ω
   F51-12 (RDY) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER MANAGEMENT CONTROL ECU - HYBRID VEHICLE CONTROL ECU) 

OK: Go to next step 

1. Turn the power switch off.
2. Connect the Techstream to the DLC3.
3. Turn the power switch on (IG).
4. Turn the Techstream on.
5. Enter the following menus: Body Electrical/Power Source Control/Data List.
   POWER SOURCE CONTROL
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Ready Signal	Status of the ready signal/ON or OFF	ON: Hybrid control system on (on (READY)) OFF: Hybrid control system off	-

   OK

   ON and OFF appear on the screen.

NG → See step   5 

OK → See step   7 

1. Reconnect the F51 connector to the power management control ECU.
   Fig 1: Identifying F51 Connector Terminal

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   Fig 2: Identifying Waveforms

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Reconnect the C28 connector to the hybrid vehicle control ECU.
3. Check the signal waveform according to the condition(s) in the table below.

   Tester Connection	F51-12 (RDY) - Body ground
   Tool setting	5 V/DIV., 20 ms./DIV.
   Vehicle condition	Power switch on (IG) → on (READY)

   TEXT IN ILLUSTRATION
   
   

   *1	Component with harness connected (Power Management Control ECU)

NG → See step   6 

OK → See step   8