B2285

2AR-FE STARTING: SMART KEY SYSTEM: B2285, B2288: Steering Lock Position Signal Circuit Malfunction
B2288 - Steering Lock Signal Circuit Malfunction

DESCRIPTION

The main body ECU and steering lock ECU are connected by a cable and a LIN communication line. These DTCs are stored when: 1) signals, transmitted through the cable and the communication line, do not match; or 2) a malfunction is detected in the circuit between the main body ECU and steering lock ECU.

The steering lock ECU unlocks the steering wheel only when it receives an unlock signal from LIN communication and the cable.





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. READ VALUE USING TECHSTREAM (STEERING LOCK CONDITION)

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG) and turn the Techstream on.

(c) Enter the following menus: Body Electrical / Main Body / Data List.

(d) Read the display on the Techstream.

Main Body





OK:

When the steering wheel is unlocked, ON appears on the Techstream screen.

NG -- CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - STEERING LOCK ECU)

OK -- REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)

2. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - STEERING LOCK ECU)

(a) Disconnect the E15 main body ECU connector.





(b) Disconnect the E77 steering lock ECU connector.

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

Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

3. CHECK WHETHER ENGINE STARTS

(a) Temporarily replace the main body ECU (instrument panel junction block) with a new or normally functioning one.

(b) Check that the engine starts normally.

OK:

Engine starts normally.

NG -- GO TO STEERING LOCK SYSTEM How to Proceed With Troubleshooting

OK -- END (MAIN BODY ECU IS DEFECTIVE)