DTC B2281 "P" Signal Malfunction (Cable-Information does not Match to Bean-Information): 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 - "P" Signal Malfunction

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

CHECK DTC OUTPUT (MULTIPLEX COMMUNICATION SYSTEM)
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.
  
  OK: No DTC is output.
NG : GO TO MULTIPLEX COMMUNICATION SYSTEM

OK : GO TO NEXT STEP

CHECK WIRE HARNESS (POWER SOURCE CONTROL ECU - SHIFT LOCK CONTROL ECU)

Disconnect the J55 ECU connector.
Disconnect the J48 ECU connector.

Measure the resistance of the wire harness side connectors.

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection (Symbols)	Specified Condition
J55-5 (P) - J48-11 (P2)	Below 1 Ω
J55-5 (P) or J48-11 (P2) - Body ground	10 kΩ or higher

Fig 2: Identifying J55 Power Source Control ECU Connector

NG : REPAIR OR REPLACE HARNESS OR CONNECTOR

OK : GO TO NEXT STEP

CHECK AND REPLACE POWER SOURCE CONTROL ECU
1. Temporarily replace the power source control ECU with a new or normally functioning one.
2. Delete the DTC (See DIAGNOSIS SYSTEM ).
3. Check for DTCs again.
  OK: No DTC is output.
NG : REPLACE SHIFT LOCK CONTROL ECU

OK : END (POWER SOURCE CONTROL ECU IS DEFECTIVE)