LIGHTING SYSTEM > TERMINALS OF ECU

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CHECK MAIN BODY ECU AND INSTRUMENT PANEL JUNCTION BLOCK

B210280E01


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*1
Instrument Panel Junction Block

B210281E01


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*1
Main body ECU (w/ Theft Deterrent System)

B210282E02


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*1
Main body ECU (w/o Theft Deterrent System)

  1. Remove the main body ECU.

  2. Disconnect the D42 main body ECU connector.

  3. Measure the resistance and voltage between each terminal of the wire harness side connectors and body ground.

    Terminal No. (Symbol)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    3F-11 (GND1) - Body ground
    		-
    		Ground
    		Always
    		Below 1 Ω
    3F-29 (ACC)*1 - Body ground
    		-
    		Ignition power supply (ACC signal)
    		Ignition switch ACC → off
    		11 to 14 V → Below 1 V
    3F-30 (BECU) - Body ground
    		-
    		+B (power system signal system) power supply
    		Always
    		11 to 14 V
    3F-32 (IG)*1 - Body ground
    		-
    		Ignition power supply (IG signal)
    		Ignition switch ON → off
    		11 to 14 V → Below 1 V
    D42-19 (BCTY) - Body ground
    		V - Body ground
    		Back door courtesy switch input
    		Back door CLOSED → OPEN
    		10 kΩ or higher → Below 1 Ω

    1. *1: w/o Entry and Start System
    If the result is not as specified, there may be a malfunction on the wire harness side.

  4. Reinstall the main body ECU.

  5. Reconnect the main body ECU connector.

  6. Measure the voltage between each terminal of the wire harness side connectors and body ground.

    Terminal No. (Symbol)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    3C-12 (ILE) - Body ground
    		B - Body ground
    		Illumination signal (to map light assembly)
    		Map light switch in DOOR position and map light assembly comes on
    		11 to 14 V
    Map light switch in OFF position and map light assembly comes off
    		Below 1 V
    If the result is not as specified, the main body ECU may have a malfunction.