Steering Heater Control Module

WARNING: This page is about a different car, the 2024 Subaru Ascent. However, it is still accessible from the selected car via links, so may be relevant.

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

Steering heater Control Module GND

Always

Less than 1 Ω

A No. 4 ←→ Chassis ground

Steering heater Control Module 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. 3 ←→ Chassis ground

Thermistor GND

Ignition switch ON, heater switch ON

Less than 1 V

D No. 4 ←→ Chassis ground

Thermistor input

Ignition switch ON, heater switch ON

1.5 - 4.5 V

D No. 5 ←→ Chassis ground

Heater output

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.