Lighting System (For Hatchback) Terminals Of Ecu

Vehicle Interior. Yaris. Ncp93, 131
Lighting (Int). Yaris. Ncp93, 131

  1. CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY AND MAIN BODY ECU

Lighting System (For Hatchback) -- Terminals Of Ecu



CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY AND MAIN BODY ECU

Yaris. Ncp93, 131.Lighting (Int).Lighting System (For Sedan).Lighting System (For Hatchback) Terminals Of Ecu


Text in Illustration
*A
Main Body ECU 1 Connector Type
-
-
*1
Instrument Panel Junction Block Assembly
*2
Main Body ECU

Yaris. Ncp93, 131.Lighting (Int).Lighting System (For Sedan).Lighting System (For Hatchback) Terminals Of Ecu


Text in Illustration
*A
Main Body ECU 2 Connector Type
-
-
*1
Instrument Panel Junction Block Assembly
*2
Main Body ECU

  1. Remove the main body ECU.

  2. Measure the voltage and resistance according to the value(s) in the table below.

    Terminal No. (Symbol)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    MB-3 (BCYL) - Body ground
    		-
    		Battery power supply
    		Always
    		11 to 14 V
    MB-11 (GND1) - Body ground
    		-
    		Ground
    		Always
    		Below 1 Ω
    MB-29 (ACC) - Body ground
    		-
    		Ignition power supply (ACC signal)
    		Ignition switch ACC
    		11 to 14 V
    MB-30 (BECU) - Body ground
    		-
    		Battery power supply
    		Always
    		11 to 14 V
    MB-32 (IG) - Body ground
    		-
    		Ignition power supply (IG signal)
    		Ignition switch ON
    		11 to 14 V
    If the result is not as specified, there may be a malfunction in the wire harness.

  3. Reinstall the main body ECU.

  4. Measure the voltage according to the value(s) in the table below.

    Terminal No. (Symbol)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    D143-1 (BCTY) - Body ground*1
    		B - Body ground
    		Back door courtesy light switch signal
    		Back door opened
    		Below 1 V
    Back door closed
    		11 to 14 V
    D143-6 (LRCY) - Body ground*2
    		G - Body ground
    		Rear door courtesy light switch signal
    		Rear door LH or RH opened
    		Below 1 V
    Rear door LH and RH closed
    		Pulse generation
    D143-7 (LSFL) - Body ground*3
    		L - Body ground
    		Front door LH unlock detection switch signal
    		Front door LH locked
    		Pulse generation
    Front door LH unlocked
    		Below 1 V
    D143-18 (LSFR) - Body ground*3
    		LG - Body ground
    		Front door RH unlock detection switch signal
    		Front door RH locked
    		Pulse generation
    Front door RH unlocked
    		Below 1 V
    D143-19 (FRCY) - Body ground
    		Y - Body ground
    		Front door courtesy light switch RH signal
    		Front door RH opened
    		Below 1 V
    Front door RH closed
    		Pulse generation
    3A-5 - Body ground
    		SB - Body ground
    		Battery power supply
    		Always
    		11 to 14 V
    3B-6 (ILE) - Body ground
    		B - Body ground
    		Illumination signal
    		Map light switch in DOOR position and map light assembly comes on
    		Below 1 V
    Map light switch in DOOR position and map light assembly comes off
    		11 to 14 V
    3D-6 (BCTL) - Body ground
    		L - Body ground
    		No. 2 room light power supply
    		Always
    		11 to 14 V
    3D-24 (LSR) - Body ground*2*4
    		Y - Body ground
    		Rear door unlock detection switch signal
    		Rear door LH and RH locked
    		Pulse generation
    Rear door LH or RH unlocked
    		Below 1 V
    3D-25 (LSR) - Body ground*2*4
    		V - Body ground
    		Rear door unlock detection switch signal
    		Rear door LH and RH locked
    		Pulse generation
    Rear door LH or RH unlocked
    		Below 1 V
    3D-35 (BCTY) - Body ground*5
    		B - Body ground
    		Back door courtesy switch signal
    		Back door opened
    		Below 1 V
    Back door closed
    		11 to 14 V
    3D-36 (FLCY) - Body ground
    		L - Body ground
    		Front door courtesy light switch LH signal
    		Front door LH opened
    		Below 1 V
    Front door LH closed
    		Pulse generation
    1. *1: w/o Daytime Running Light System and w/o Theft Deterrent System
    2. *2: for 5 Door
    3. *3: w/ Power Door Lock
    4. *4: w/ Theft Deterrent System
    5. *5: w/ Daytime Running Light System or w/ Theft Deterrent System
    HINT:
    If the result is not as specified, the main body ECU or instrument panel junction block assembly may have a malfunction.