Dtc B2281 P Signal Malfunction

Engine. Lexus Is250, Is220D. Gse20 Ale20
4Gr-Fse Starting. Lexus Is250, Is220D. Gse20 Ale20

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK DTC OUTPUT (MULTIPLEX COMMUNICATION SYSTEM)

CHECK DTC OUTPUT (AUTOMATIC TRANSMISSION SYSTEM)

CHECK CONNECTORS

CHECK WIRE HARNESS (POWER SOURCE CONTROL ECU - BODY GROUND)

INSPECT SHIFT LOCK CONTROL ECU

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

READ VALUE OF INTELLIGENT TESTER

DTC B2281 "P" Signal Malfunction


DESCRIPTION

The power source control ECU and the shift lock control ECU are connected by a cable and the BEAN. If the cable information and BEAN information are inconsistent, this DTC will be output.
HINT:
When the power source control ECU is replaced with a new one and the negative (-) battery terminal is connected, the power source mode becomes the IG-ON mode. When the battery is removed and reinstalled, the power source mode that was selected when the battery was removed is restored.

DTC No.
DTC Detection Condition
Trouble Area
B2281
Cable and BEAN between the power source control ECU and the shift lock control ECU are inconsistent
  1. Power source control ECU
  2. Shift lock control ECU
  3. ECM
  4. Wire harness or connector

WIRING DIAGRAM


Lexus Is250, Is220D. Gse20 Ale20.4Gr-Fse Starting.Starting System. Dtc B2281 P Signal Malfunction


INSPECTION PROCEDURE

1.CHECK DTC OUTPUT (MULTIPLEX COMMUNICATION SYSTEM)

  1. Delete the DTC (Click here).

  1. 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


2.CHECK DTC OUTPUT (AUTOMATIC TRANSMISSION SYSTEM)

  1. Delete the DTCs (Click here).

  1. Check for the automatic transmission system DTC P0705.

    OK:
    DTC P0705 is not output.
    HINT:
    If DTC P0705 is output, perform troubleshooting for DTC P0705 first (Click here).


NG
GO TO AUTOMATIC TRANSMISSION SYSTEM
OK


3.CHECK CONNECTORS

  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


4.CHECK WIRE HARNESS (POWER SOURCE CONTROL ECU - BODY GROUND)


    Lexus Is250, Is220D. Gse20 Ale20.4Gr-Fse Starting.Starting System. Dtc B2281 P Signal Malfunction

  1. Disconnect the ECU connector.

  1. 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


5.INSPECT SHIFT LOCK CONTROL ECU


    Lexus Is250, Is220D. Gse20 Ale20.4Gr-Fse Starting.Starting System. Dtc B2281 P Signal Malfunction

  1. Disconnect the shift lock control ECU connector.

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

    Standard resistance:
    Tester Connection (Symbols)
    		Condition
    		Specified Condition
    J48-11 (P2) - J48-8 (E)
    		Shift P position
    		Below 1 Ω
    Shift non-P position
    		10 kΩ or higher


NG
REPLACE SHIFT LOCK CONTROL ECU
OK


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


    Lexus Is250, Is220D. Gse20 Ale20.4Gr-Fse Starting.Starting System. Dtc B2281 P Signal Malfunction

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

    Standard resistance:
    Tester Connection (Symbols)
    		Condition
    		Specified Condition
    J55-5 (P) - J48-11 (P2)
    		Always
    		Below 1 Ω
    J55-5 (P) or J48-11 (P2) - Body ground
    		Always
    		10 kΩ or higher
    J48-8 (E) - Body ground
    		Always
    		Below 1 Ω


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


7.READ VALUE OF INTELLIGENT TESTER

  1. Connect the intelligent tester to the DLC3.

  1. Turn the engine switch on (IG).

    Power Source Control:
    Item
    		Measurement Item/Display (Range)
    		Normal Condition
    		Diagnostic Note
    Shift P Sig
    		Shift P position/ ON or OFF
    		ON: Shift P position
    OFF: Shift non-P position
    		-
    OK:
    ON (shift P position) and OFF (shift non-P position) appear on the screen.


NG
REPLACE POWER SOURCE CONTROL ECU
OK

REPLACE ECM