Lexus IS250 · Service Manual ENGINE

B2285

Diagnostic trouble codes

DESCRIPTION

This DTC is output when serial communication signals and LIN communication signals in the circuit between the power source control ECU and steering lock actuator (steering lock ECU) are inconsistent.

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
B2285
 Cable and LIN information between the power source control ECU and the steering lock ECU are inconsistent
  1. Power source control ECU
  2. Steering lock ECU
  3. Wire harness or connector

WIRING DIAGRAM

B112585E01

INSPECTION PROCEDURE


1. CHECK FOR DTCS

  1. Delete the DTC (Click here).

  1. Check for DTC B2785 and DTC B2287.

    OK:
    DTC B2785 and DTC B2287 are not output.

    HINT:
    1. IF DTC B2785 is output (Click here).
    2. IF DTC B2287 is output (Click here).



 NG
GO TO DTC CHART
OK


2. 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


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

  1. B128304E23
    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


4. CHECK WIRE HARNESS (POWER SOURCE CONTROL ECU - STEERING LOCK ECU)

  1. A109237E08
    Disconnect the J29 ECU connector.

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

    Standard resistance:
    Tester Connection (Symbols)
    		 Condition
    		 Specified Condition
    J55-26 (SLP) - J29-4 (SLP1)
    		 Always
    		 Below 1 Ω
    J55-30 (LIN1) - J29-5 (LIN)
    		 Always
    		 Below 1 Ω
    J55-26 (SLP) or J29-4 (SLP1) - Body ground
    		 Always
    		 10 kΩ or higher
    J55-30 (LIN1) or J29-5 (LIN) - Body ground
    		 Always
    		 10 kΩ or higher



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


5. INSPECT POWER SOURCE CONTROL ECU

  1. B112480E16
    Reconnect the J55 ECU connector.

  1. A130277E02
    Connect the oscilloscope to the power source control ECU terminals specified in the table below and check the waveform.
    Item
    		 Contents
    Terminal (Symbols)
    		 J55-26 (SLP) - Body ground
    Equipment Setting
    		 2 V/DIV, 100 ms/DIV
    Condition
    		 Engine switch on (IG)

    OK:
    The waveform appears as shown in the illustration.

    HINT:
    The waveform varies depending on the contents of communication.



 NG
REPLACE POWER SOURCE CONTROL ECU
OK


6. INSPECT STEERING LOCK ECU

  1. B112480E16
    Reconnect the J29 ECU connector.

  1. A130277E01
    Connect the oscilloscope to the power source control ECU terminals specified in the table below and check the waveform.
    Item
    		 Contents
    Terminal (Symbols)
    		 J55-26 (SLP) - Body ground
    Equipment Setting
    		 2 V/DIV, 100 ms/DIV
    Condition
    		 Steering is LOCK / UNLOCK

    OK:
    The waveform appears as shown in the illustration.

    HINT:
    The waveform varies depending on the contents of communication.



 NG
REPLACE STEERING LOCK ECU
OK

REPLACE POWER SOURCE CONTROL ECU


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