Steering Heater Unit

Courtesy of SUBARU OF AMERICA, INC.

Terminal No.

Contents

Measuring condition

Standard

A No. 1

Not used

A No. 2

Not used

A No. 3 ←→ Chassis ground

Heater unit GND

Always

1 less than 1 Ω

A No. 4 ←→ Chassis ground

Heater unit power supply input

Ignition switch ON

10 - 14 V

B No. 1 ←→ Chassis ground

Heater switch power supply input

Ignition switch ON

10 - 14 V

B No. 2 ←→ Chassis ground

Heater switch input

Turn the ignition switch to ON, and press and hold the heater switch.

9 - 14 V

B No. 3

Not used

B No. 4

Indicator light output

⁽¹⁾

D No. 1 ←→ Chassis ground

Heater GND

Ignition switch ON, heater switch ON

Less than 1 V

D No. 2 ←→ Chassis ground

Thermistor GND

Ignition switch ON, heater switch ON

Less than 1 V

D No. 3 - Chassis ground

Thermistor input

Ignition switch ON, heater switch ON

1.5 - 4.5 V

D No. 5 - Chassis ground

Heater input

Ignition switch ON, heater switch ON

9 - 14 V

⁽¹⁾	Illuminates when the ignition switch and heater switch are turned to ON.

NOTE: Connect the each connector of the unit before checking.