DTC B2286: Runnable Signal Malfunction: Procedure

1. Run the engine and check if the function of the tachometer in the combination meter is normal.

   OK

   Actual engine revolution speed and the revolution indicated on the tachometer are the same.

NG → GO TO COMBINATION METER SYSTEM 

OK: Go to next step 

1. Delete the DTC, Refer to DTC CHECK / CLEAR .
2. Check for the multiplex network communication system DTCs B1210, B1214 and B1215.

   HINT: 

   If the DTCs for the multiplex network communication system malfunction are output, inspect those DTCs first, Refer to DIAGNOSTIC TROUBLE CODE CHART .

   OK

   No DTC is output.

NG → GO TO MULTIPLEX COMMUNICATION SYSTEM 

OK: Go to next step 

1. Delete the DTC, Refer to DTC CHECK / CLEAR .
2. Check for the CAN communication system DTC U0146.

   HINT: 

   If the DTCs for the CAN communication system malfunction are output, inspect those DTCs first, Refer to HOW TO PROCEED WITH TROUBLESHOOTING .

   OK

   No DTC is output.

NG → GO TO CAN COMMUNICATION SYSTEM 

OK: Go to next step 

1. Check that the connectors are securely connected and the terminals are not deformed or loose.

   OK

   The connectors are securely connected and the terminals are not deformed or loose.

NG → REPAIR OR REPLACE CONNECTORS 

OK: Go to next step 

1. Disconnect the ECU connector.
   Fig 1: Identifying Terminal GND2 Of J55 Power Source Control ECU Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester Connection (Symbols)	Condition	Specified Condition
   J55-6 (GND2) - Body ground	Always	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Disconnect the A6 ECM connector.
   Fig 2: Identifying J55 Power Source Control ECU Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester Connection (Symbols)	Condition	Specified Condition
   J55-2 (TACH) - A6-16 (TACH)	Always	Below 1 Ω
   J55-2 (TACH) or A6-16 (TACH) - Body ground	Always	10 kΩ or higher

   HINT: 

   If the result of the inspection for a short circuit is not as specified, there may be a short in the ECU.

NG → REPAIR OR REPLACE HARNESS, CONNECTOR OR EACH ECU 

OK: Go to next step 

1. Reconnect the connectors.
2. Connect Techstream to the DLC3.
3. Turn the engine switch on (IG).
4. Check the DATA LIST for proper functioning of the engine running.
   BODY:
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Engine Condition	Engine condition/ STOP or RUN	STOP: Engine is stopped RUN: Engine is running	-

   OK

   STOP (engine is stopped) and RUN (engine is running) appear on the screen.

NG → REPLACE ECM 

OK: Go to next step 

1. Delete the DTCs, Refer to DTC CHECK / CLEAR .
2. Check for DTCs again.

   OK

   DTC B2286 is not output.

NG → REPLACE POWER SOURCE CONTROL ECU 

OK → CHECK INTERMITTENT PROBLEMS