Toyota TechDoc

DTC B2285 Steering Lock Position Signal Circuit Malfunction

for Preparation Click here

DESCRIPTION

The power management control ECU*1 or power source control ECU*2 receives signals from the steering lock actuator assembly (steering lock ECU) via a direct line and via a LIN communication line. If the information received via these 2 lines is inconsistent, this DTC will be stored.

HINT:

When the power management control ECU*1 or power source control ECU*2 is replaced with a new one and the cable is connected to the negative (-) battery terminal, 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	Information received by the power management control ECU1 or power source control ECU2 from the steering lock actuator assembly (steering lock ECU) via a direct line and a via the LIN communication line is inconsistent.	AM2 No. 2 fuse MAIN fuse Steering lock actuator assembly (steering lock ECU) Power management control ECU1 Power source control ECU2 Wire harness or connector

*1: for 1KR-FE and 1NR-FE
*2: for 1ND-TV

WIRING DIAGRAM

INSPECTION PROCEDURE

NOTICE:

Inspect the fuses for circuits related to this system before performing the following inspection procedure.

HINT:

Check the connector connections and terminals to make sure that there are no abnormalities such as loose connections, deformation, etc.

1.CHECK FOR DTC

Connect the intelligent tester to the DLC3.

Turn the engine switch on (IG).

Turn the intelligent tester on.

Clear the DTCs (Click here).

Check if DTC B2287 is output.
OK:
DTC B2287 is not output.

GO TO DTC (B2287) (Click here)

OK

2.CHECK HARNESS AND CONNECTOR (POWER SOURCE)

Disconnect the D38 or D73 ECU connector.

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

for 1KR-FE and 1NR-FE

Standard Voltage:

Tester Connection	Condition	Specified Condition
D38-2 (AM21) - Body ground	Always	9.5 to 16 V
D38-1 (AM22) - Body ground	Always	9.5 to 16 V

Text in Illustration
*A	for 1KR-FE and 1NR-FE
*B	for 1ND-TV
*1	Rear view of wire harness connector (to Power Management Control ECU) (for 1KR-FE and 1NR-FE)
*2	Rear view of wire harness connector (to Power Source Control ECU) (for 1ND-TV)

for 1ND-TV
Standard Voltage:
Tester Connection
Condition
Specified Condition
D73-2 (AM21) - Body ground
Always
9.5 to 16 V
D73-1 (AM22) - Body ground

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

3.CHECK HARNESS AND CONNECTOR (GROUND)

Disconnect the D38 or D73 ECU connector.

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

for 1KR-FE and 1NR-FE

Standard Resistance:

Tester Connection	Condition	Specified Condition
D38-6 (GND) - Body ground	Always	Below 1 Ω
D38-5 (GND2) - Body ground	Always	Below 1 Ω

Text in Illustration
*A	for 1KR-FE and 1NR-FE
*B	for 1ND-TV
*1	Rear view of wire harness connector (to Power Management Control ECU) (for 1KR-FE and 1NR-FE)
*2	Rear view of wire harness connector (to Power Source Control ECU) (for 1ND-TV)

for 1ND-TV
Standard Resistance:
Tester Connection
Condition
Specified Condition
D73-6 (GND) - Body ground
Always
Below 1 Ω
D73-5 (GND2) - Body ground

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

4.INSPECT STEERING LOCK ACTUATOR ASSEMBLY

Reconnect the D33 steering lock actuator assembly (steering lock ECU) connector.

Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
Condition
Specified Condition
4 (SLP1) - Body ground
Steering lock
10 kΩ or higher
Steering unlock
Below 1 Ω
Text in Illustration
*1
Component with harness connected
(Steering Lock Actuator Assembly (Steering Lock ECU))

Text in Illustration
*1	Component with harness connected (Steering Lock Actuator Assembly (Steering Lock ECU))

REPLACE STEERING LOCK ACTUATOR ASSEMBLY (Click here)

OK

5.CHECK HARNESS AND CONNECTOR (ECU - STEERING LOCK ECU)

Disconnect the D38 or D73 ECU connector.

Disconnect the D33 steering lock ECU connector.

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

for 1KR-FE and 1NR-FE

Standard Resistance:

Tester Connection	Condition	Specified Condition
D38-3 (SLP) - D33-4 (SLP1)	Always	Below 1 Ω
D38-3 (SLP) - Body ground	Always	10 kΩ or higher

Text in Illustration
*A	for 1KR-FE and 1NR-FE
*B	for 1ND-TV
*1	Rear view of wire harness connector (to Power Management Control ECU) (for 1KR-FE and 1NR-FE)
*2	Rear view of wire harness connector (to Power Source Control ECU) (for 1ND-TV)
*3	Front view of wire harness connector (to Steering Lock Actuator Assembly (Steering Lock ECU))

for 1ND-TV
Standard Resistance:
Tester Connection
Condition
Specified Condition
D73-3 (SLP) - D33-4 (SLP1)
Always
Below 1 Ω
D73-3 (SLP) - Body ground
10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

6.READ VALUE USING INTELLIGENT TESTER (STEERING UNLOCK SWITCH)

Turn the engine switch on (IG).

Turn the intelligent tester on.

Enter the following menus: Body / Power Source Control / Data List.

Read the Data List according to the display on the intelligent tester.

Power Source Control
Tester Display
Measurement Item/Range
Normal Condition
Diagnostic Note
Steering Unlock Switch
Steering lock condition/ON or OFF
ON: Steering unlocked (Engine switch on (ACC))
OFF: Steering locked (Engine switch off)
-

Power Source Control
Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
Steering Unlock Switch	Steering lock condition/ON or OFF	ON: Steering unlocked (Engine switch on (ACC)) OFF: Steering locked (Engine switch off)	-

OK:: ON (steering is unlocked) and OFF (steering is locked) appear on the screen.

Result

Result	Proceed to
OK	A
NG (for 1KR-FE and 1NR-FE)	B
NG (for 1ND-TV)	C

REPLACE POWER MANAGEMENT CONTROL ECU (Click here)

REPLACE POWER SOURCE CONTROL ECU (Click here)

REPLACE STEERING LOCK ACTUATOR ASSEMBLY (Click here)