Steering Heater Switch

Measure the voltage between connector terminals.

CAUTION: Perform measurement using the circuit tester "diode mode".

Courtesy of SUBARU OF AMERICA, INC.

Terminal No.	Inspection conditions	Standard
4 (+) - 5 (-)	Operate the switch and hold it.	0.3 V - 1.6 V
4 (+) - 5 (-)	Do not operate the switch.	"O.L" or "O.F" display

Apply battery voltage between the connector terminals to check lighting condition of illumination and indicator inside the switch.

CAUTION: When applying battery voltage, do not mix up the positive (+) side and the negative (-) side.
Incorrect polarity connection may cause LED damage inside the switch.

Terminal No.	Inspection conditions	Standard
3 (+) - 1 (-)	Apply battery voltage	Illumination (mark) turns on.
4 (+) - 7 (-)	Apply battery voltage	Indicator turns on.
3 (+) - 1 (-) 4 (+) - 7 (-)	Apply battery voltage simultaneously.	Illumination (mark) and indicator turn on in dimmed condition at one level.

Replace the steering heater switch if fault is found in the inspection.