Subaru Legacy BN/BS (2015-2019) Service Manual: Check eyesight steering switch

Subaru Legacy BN/BS (2015-2019) Service Manual / Eyesight (diagnostics) / Diagnostics with phenomenon / Check eyesight steering switch

TROUBLE SYMPTOM:

• Cruise control cannot be set. (Cancelled immediately.)

• Cruise control cannot be released.

WIRING DIAGRAM:

NOTE:

For the coupling connector, refer to WIRING SYSTEM.

EyeSight System EyeSight System > WIRING DIAGRAM

STEP	CHECK	YES	NO
1.CHECK EyeSight STEERING SWITCH CIRCUIT. 1) Remove the driver’s airbag module. Driver’s Airbag Module > REMOVAL 2) Disconnect the EyeSight steering switch harness connector. 3) Turn the ignition switch to ON. 4) Measure the voltage between harness connector terminal and chassis ground. Connector & terminal (ST3) No. 3 (+) — Chassis ground (−): (ST3) No. 4 (+) — Chassis ground (−):	Is the voltage 5 V or more-	Diagnostics with Phenomenon > CHECK EyeSight STEERING SWITCH	Check for open/short circuit or poor contact in the harness between EyeSight steering switch and ECM and in the steering roll connector.
2.CHECK EyeSight STEERING SWITCH CIRCUIT. 1) Turn the ignition switch to OFF. 2) Remove the EyeSight steering switch. Switches and Harness 3) Measure the resistance between harness connector terminal and chassis ground. Connector & terminal (ST3) No. 9 — Chassis ground:	Is the resistance less than 10 --	Diagnostics with Phenomenon > CHECK EyeSight STEERING SWITCH	Check for open circuit between EyeSight steering switch and chassis ground.
3.CHECK EyeSight STEERING SWITCH. Check EyeSight steering switch. Switches and Harness	Is the EyeSight steering switch normal-	Replace the ECM. Engine Control Module (ECM) > REMOVAL Engine Control Module (ECM) > REMOVAL	Replace the EyeSight steering switch. Switches and Harness

Check adaptive cruise control indicator light/constant speed cruise control indicator light and cruise set indicator light

TROUBLE SYMPTOM:Adaptive cruise control or conventional cruise control can be set, but adaptive cruise control indicator light/constant speed cruise control indicator light and cruise SET indicator li ...

Ecm cancel code(s) display

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Other materials:

Dtc u0126 lost communication with steering angle sensor module
DTC DETECTING CONDITION:No data is received from steering angle sensor.TROUBLE SYMPTOM:VDC CM does not operate normally.STEPCHECKYESNO1.CHECK PERFORMING OF BASIC DIAGNOSTIC PROCEDURE.Was the basic diagnostic procedure performed up to STEP 8- Diagnostic Procedure with Diagnostic Trouble Code (DTC) > ...