Heated Steering Wheel System Terminals Of Ecu

  1. CHECK HEATED STEERING WHEEL CONTROLLER

Heated Steering Wheel System -- Terminals Of Ecu



CHECK HEATED STEERING WHEEL CONTROLLER
HINT:
Inspect the connectors from the back side while the connectors are connected.

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  1. Measure the voltage or resistance according to the value(s) in the table below.

    Terminal No. (Symbol)
    		Terminal Description
    		Condition
    		Specified Condition
    A-1 (CCU) - Body ground
    		LED output signal
    		Engine switch on (IG), Steering heater switch on
    		Below 3 V
    A-2 (CCV) - Body ground
    		Steering heater switch input signal
    		Engine switch on (IG), Steering heater switch pressed and held
    		11 to 14 V
    A-3 (CCX) - Body ground
    		Ground
    		Always
    		Below 1 Ω
    A-4 (CCW) - Body ground
    		IG power supply
    		Engine switch on (IG)
    		11 to 14 V
    B-1 (TH1) - Body ground
    		Thermistor input signal
    		Engine switch on (IG), Steering heater switch on at 0 to 40°C (32 to 104°F)
    		1.5 to 4.5 V*1
    B-2 (TH2) - Body ground
    		Thermistor ground
    		Engine switch on (IG), Steering heater switch on
    		Below 1 V
    B-3 (SH2) - Body ground
    		Heater output signal
    		Engine switch on (IG), Steering heater switch on
    		11 to 14 V*2
    B-4 (SH1) - Body ground
    		Heater ground
    		Engine switch on (IG), Steering heater switch on
    		Below 1 V
    HINT:
    1. *1: When ambient temperature is 0 to 40°C (32 to 104°F).
    2. *2: The current to the heater turns ON/OFF depending on the temperature of the thermistor. As a result, it may take several minutes before a voltage value is output.