DTC B2285: Steering Lock Position Signal Circuit Malfunction; DTC B2288: Steering Lock Signal Circuit Malfunction: Procedure

WARNING: This page is about a different car, the 2011 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.

PERFORM ACTIVE TEST USING TECHSTREAM

Connect Techstream to the DLC3.
Turn the power switch on (IG) and press Techstream main switch on.

Preform the Active Test according to the displays on the tester.

POWER SOURCE CONTROL ECU:

Tester Display	Test Part	Control Range	Diagnostic Note
P Supply for Steering Lock	Power supply for steering lock	ON / OFF	-

When ON is selected, power is supplied to the steering lock ECU.

NG → See step 2

OK → GO TO STEERING LOCK SYSTEM STEERING LOCK FUNCTION

CHECK DTC OUTPUT
1. Delete the DTC. Refer to DTC CHECK / CLEAR .
  HINT:
  
  After all DTCs are cleared, check if the trouble occurs again 5 seconds after the engine switch is turned on (IG).
2. Check for DTCs again.
  OK
  
  No DTC is output.
OK → END

NG: Go to next step

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

Disconnect the D44 ECU connector.

Fig 1: Identifying D44 ECU Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Disconnect the D14 ECU connector.

Fig 2: Identifying D14 ECU Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Resistance

Terminal No. (Symbol)	Specified Condition
D44-26 (SLP) - D14-4 (SLP1)	Below 1 Ω
D44-26 (SLP) - Body ground	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step

CHECK POWER SOURCE CONTROL ECU
1. After replacing the power source control ECU with a normally functioning ECU, check that the steering lock unlocks.
  OK
  
  Steering lock unlocks.
NG → GO TO STEERING LOCK SYSTEM STEERING LOCK FUNCTION

OK → END (POWER SOURCE CONTROL ECU DEFECTIVE)