DTC B2286 Runnable Signal Malfunction: Wiring Diagram

WARNING: This page is about a different car, the 2006 Lexus IS 350. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Wiring Diagram - Runnable Signal Malfunction

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

CHECK OPERATION OF TACHOMETER
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
CHECK DTC OUTPUT (MULTIPLEX NETWORK COMMUNICATION SYSTEM (BEAN))
1. Delete the DTC (See DIAGNOSIS SYSTEM ).
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 (See DTC CHECK/CLEAR ).
  
  OK: No DTC is output.
NG : GO TO MULTIPLEX COMMUNICATION SYSTEM

OK : GO TO NEXT STEP
CHECK DTC OUTPUT (CAN COMMUNICATION SYSTEM)
1. Delete the DTC (See DIAGNOSIS SYSTEM ).
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 (See DIAGNOSIS SYSTEM ).
  
  OK: No DTC is output.
NG : GO TO CAN COMMUNICATION SYSTEM

OK : GO TO NEXT STEP

CHECK WIRE HARNESS (POWER SOURCE CONTROL ECU - ECM)

Disconnect the J55 ECU connector.
Disconnect the A6 ECM connector.

Measure the resistance of the wire harness side connectors.

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

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

NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OR EACH ECU

OK : GO TO NEXT STEP

Fig 2: Identifying J55 Power Source Control ECU Connector

OK : GO TO NEXT STEP

REPLACE POWER SOURCE CONTROL ECU