Lexus IS250 IS220d GSE20 ALE20 2AD-FHV STARTING

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK FOR DTCS

CHECK CONNECTORS

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

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

INSPECT POWER SOURCE CONTROL ECU

INSPECT STEERING LOCK ECU

DTC B2285 Steering Lock Position Signal Circuit Malfunction

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	Power source control ECU Steering lock ECU Wire harness or connector

WIRING DIAGRAM

Dtc B2285 Steering Lock Position Signal Circuit Malfunction. 2AD-FHV STARTING. Lexus IS250 IS220d GSE20 ALE20

INSPECTION PROCEDURE

1.CHECK FOR DTCS

Delete the DTC .

Check for DTC B2785 and DTC B2287.

OK:
DTC B2785 and DTC B2287 are not output.

HINT:

If DTC B2785 is output .

If DTC B2287 is output .

NG

GO TO DTC CHART

OK

2.CHECK CONNECTORS

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)

Dtc B2285 Steering Lock Position Signal Circuit Malfunction. 2AD-FHV STARTING. Lexus IS250 IS220d GSE20 ALE20

Disconnect the ECU connector.

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)

Disconnect the J29 ECU connector.

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

Reconnect the J55 ECU connector.

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.

NG

REPLACE POWER SOURCE CONTROL ECU

OK

6.INSPECT STEERING LOCK ECU

Reconnect the J29 ECU connector.

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.

NG

REPLACE STEERING LOCK ECU

OK

REPLACE POWER SOURCE CONTROL ECU

LEXUS IS250, IS220d / GSE20 ALE20

2AD-FHV STARTING

Lexus IS250 IS220d GSE20 ALE20

ENTRY AND START SYSTEM