LIGHTING SYSTEM > TERMINALS OF ECU

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CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY AND MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

E187247E21

  1. Disconnect the 2A, 2B, 2C, 2E and H17 instrument panel junction block assembly and main body ECU (multiplex network body ECU) connectors.

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

    Terminal No.
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    2A-43 - Body ground
    		G - Body ground
    		ACC power supply
    		Power switch on (ACC)
    		11 to 14 V
    Power switch off
    		Below 1 V
    2B-4 - Body ground
    		W-B - Body ground
    		Ground
    		Always
    		Below 1 Ω
    2B-25 - Body ground
    		B - Body ground
    		IG power supply
    		Power switch on (IG)
    		11 to 14 V
    Power switch off
    		Below 1 V
    2C-18 - Body ground
    		B - Body ground
    		Auxiliary battery power supply
    		Power switch off
    		11 to 14 V
    2E-1*1 - Body ground
    2F-1*2 - Body ground
    		W - Body ground
    		Auxiliary battery power supply
    		Power switch off
    		11 to 14 V

    1. *1: for LHD
    2. *2: for RHD
    If the result is not as specified, there may be a malfunction in the wire harness.

  3. Measure the resistance according to the value(s) in the table below.

    Terminal No. (Symbol)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    2B-4 - Body ground
    		W-B - Body ground
    		Ground
    		Always
    		Below 1 Ω
    2B-6 - Body ground
    		W-B - Body ground
    		Ground
    		Always
    		Below 1 Ω
    H17-3 (GND2) - Body ground
    		W-B - Body ground
    		Ground
    		Always
    		Below 1 Ω
    If the result is not as specified, there may be a malfunction in the wire harness.

  4. Reconnect the 2A, 2B, 2C, 2E and H17 instrument panel junction block assembly and main body ECU (multiplex network body ECU) connectors.

  5. Measure the voltage and check for pulses according to the value(s) in the table below.

    Terminal No. (Symbol)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    2B-17 - Body ground
    		L - Body ground
    		Footwell light RH drive output
    		Footwell light RH off
    		11 to 14 V
    Footwell light RH on
    		Below 1 V
    2B-18 - Body ground
    		V - Body ground
    		Footwell light LH drive output
    		Footwell light LH off
    		11 to 14 V
    Footwell light LH on
    		Below 1 V
    2B-27 - Body ground
    		G - Body ground
    		Interior lights drive output
    		Power switch off, interior lights off (illuminated entry system operation)
    		11 to 14 V
    Power switch off, interior lights on (illuminated entry system operation)
    		Below 1 V
    2D-25 - Body ground
    		GR - Body ground
    		Rear door unlock detection switch LH input
    		Rear door LH locked
    		Pulse generation
    Rear door LH unlocked
    		Below 1 V
    2D-35 - Body ground
    		BR - Body ground
    		Front door courtesy light switch LH input
    		Front door LH open
    		Below 1 V
    Front door LH closed
    		11 to 14 V
    2D-36 - Body ground
    		BR - Body ground
    		Front door courtesy light switch RH input
    		Front door RH open
    		Below 1 V
    Front door RH closed
    		11 to 14 V
    H16-6 (RCTY) - Body ground
    		G - Body ground
    		Rear door courtesy light switch RH input
    		Rear door RH open
    		Below 1 V
    Rear door RH closed
    		11 to 14 V
    H16-7 (LSFL) - Body ground
    		GR - Body ground
    		Front door unlock detection switch LH input
    		Front door LH locked
    		Pulse generation
    Front door LH unlocked
    		Below 1 V
    H16-18 (LSFR) - Body ground
    		SB - Body ground
    		Front door unlock detection switch RH input
    		Front door RH locked
    		Pulse generation
    Front door RH unlocked
    		Below 1 V
    H16-19 (BCTY) - Body ground
    		SB - Body ground
    		Back door courtesy light switch input
    		Back door open
    		Below 1 V
    Back door closed
    		11 to 14 V
    H17-2 (LSWR) - Body ground
    		GR - Body ground
    		Rear door unlock detection switch RH input
    		Rear door RH locked
    		Pulse generation
    Rear door RH unlocked
    		Below 1 V
    H18-2 (CSPT) - Body ground
    		SB - Body ground
    		Center console spot light (blue) drive output
    		Center console spot light (blue) off
    		Below 1 V
    Center console spot light (blue) on
    		11 to 14 V
    H18-3 (LCTY) - Body ground
    		G - Body ground
    		Rear door courtesy light switch LH input
    		Rear door LH open
    		Below 1 V
    Rear door LH closed
    		Pulse generation
    H18-6 (OSPT) - Body ground
    		Y - Body ground
    		Center console spot light (red) drive output
    		Center console spot light (red) off
    		Below 1 V
    Center console spot light (red) on
    		11 to 14 V
    H18-12 (BCYL) - Body ground
    		SB - Body ground
    		Luggage compartment room light drive output
    		Luggage compartment door open
    		Below 1 V
    Luggage compartment door closed
    		11 to 14 V
    If the result is not as specified, the main body ECU (multiplex network body ECU) or instrument panel junction block assembly may have a malfunction.


CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

B203498E68

  1. Disconnect the H1 certification ECU (smart key ECU assembly) connector.

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

    Terminal No. (Symbol)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    H1-1 (+B) - Body ground
    		B - Body ground
    		+B power supply
    		Power switch off
    		11 to 14 V
    If the result is not as specified, there may be a malfunction in the wire harness.

  3. Measure the resistance according to the value(s) in the table below.

    Terminal No. (Symbol)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    H1-15 (E) - Body ground
    		W-B - Body ground
    		Ground
    		Always
    		Below 1 Ω
    If the result is not as specified, there may be a malfunction in the wire harness.

  4. Reconnect the H1 certification ECU (smart key ECU assembly) connector.

  5. Measure the voltage and check for pulses according to the value(s) in the table below.

    Terminal No. (Symbol)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    H1-11 (SWIL) - Body ground
    		G - Body ground
    		Power switch illumination drive output
    		Power switch illumination on
    		11 to 14 V
    Power switch illumination off
    		Below 1 V
    H1-16 (IG) - Body ground
    		BE - Body ground
    		IG power supply
    		Power switch on (IG)
    		11 to 14 V
    If the result is not as specified, the certification ECU (smart key ECU assembly) may have a malfunction.