LIGHTING SYSTEM TERMINALS OF ECU


  1. CHECK MAIN BODY ECU (PASSENGER SIDE JUNCTION BLOCK ASSEMBLY)

    A01CFO9E08

    1. Disconnect the G50, 4A and 4K ECU connectors.

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

      Standard Resistance
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      G50-1 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      4A-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.

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

      Standard Voltage
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      4A-26 (ACC) - Body ground GR - Body ground ACC power supply Engine switch on (ACC) 11 to 14 V
      Engine switch off Below 1 V
      4K-9 (BATB) - Body ground W - Body ground Battery power supply Always 11 to 14 V

      If the result is not as specified, there may be a malfunction in the wire harness.

    4. Reconnect the G50, 4A and 4K ECU connectors.

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

      Standard Voltage
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      G48-9 (LSWD) - Body ground SB - Body ground Driver door unlock detection switch input Driver door locked Pulse generation
      Driver door unlocked Below 1 V
      G48-24 (DCTY) - Body ground W - Body ground Driver door courtesy switch input Driver door closed 11 to 14 V
      Driver door open Below 1 V
      G49-4 (ILRR) - Body ground R - Body ground Ceiling light RH drive output Ceiling light RH on (100% brightness of light on state) Below 1.5 V
      Ceiling light RH on (Illuminate in light adjustment state) Pulse generation
      Ceiling light RH off 11 to 14 V
      G49-5 (LSWR) - Body ground Y - Body ground Slide door RH unlock detection switch input Slide door RH locked Pulse generation
      Slide door RH unlocked Below 1 V
      G49-7 (RCTY) - Body ground LG - Body ground Slide door RH courtesy switch input Slide door RH closed Pulse generation
      Slide door RH open Below 1 V
      G49-15 (ILRL) - Body ground L - Body ground Ceiling light LH drive output Ceiling light LH on (100% brightness of light on state) Below 1.5 V
      Ceiling light LH on (Illuminate in light adjustment state) Pulse generation
      Ceiling light LH off 11 to 14 V
      G49-21 (PCTY) - Body ground L - Body ground Front passenger door courtesy switch input Front passenger door closed 11 to 14 V
      Front passenger door open Below 1 V
      G49-25 (BCTY) - Body ground W - Body ground Back door courtesy switch input Back door closed and luggage compartment light switch on (*1, *3) 11 to 14 V
      Back door closed and luggage compartment light switch off (*1, *3) Pulse generation
      Back door closed (*2, *4) Pulse generation
      Back door open Below 1 V
      G50-2 (SW2) - Body ground L - Body ground Rear ceiling light switch input Rear ceiling light switch not pushed 11 to 14 V
      Rear ceiling light switch pushed Below 1 V
      G50-3 (SW1) - Body ground SB - Body ground Front ceiling light switch input Front ceiling light switch not pushed 11 to 14 V
      Front ceiling light switch pushed Below 1 V
      G50-11 (FSPT) - Body ground G - Body ground Footwell light drive output Footwell light on and shift lever in P Below 1 V
      Footwell light on and shift lever not in P Pulse generation
      Footwell light off 10 to 14 V
      4A-4 (LCTY) - Body ground R- Body ground Slide door LH courtesy switch input Slide door LH closed Pulse generation
      Slide door LH open Below 1 V
      4D-2 (ILE) - Body ground W - Body ground Interior light drive output Interior light on Below 1 V
      Interior light off 11 to 14 V
      4D-6 (LSWL) - Body ground SB - Body ground Slide door LH unlock detection switch input Slide door LH locked Pulse generation
      Slide door LH unlocked Below 1 V

      Tech Tips


      • *1: w/o Power Back Door System

      • *2: w/ Power Back Door System

      • *3: w/o Back Door Closer System

      • *4: w/ Back Door Closer System

      If the result is not as specified, the ECU may have a malfunction.

  2. CHECK BACK DOOR MOTOR UNIT (POWER BACK DOOR ECU)

    A01CG9EE11

    1. Disconnect the N18 ECU connector.

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

      Standard Resistance
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      N18-11 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω

      If the result is not as specified, there may be a malfunction on the wire harness side.

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

      Standard Voltage
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      N18-10 (ECUB) - Body ground R - Body ground Battery power supply Always 11 to 14 V
      N18-12 (B) - Body ground B - Body ground Battery power supply Always 11 to 14 V
      N18-8 (IG) - Body ground R - Body ground IG power supply Engine switch on (IG) 11 to 14 V
      Engine switch off Below 1 V

      If the result is not as specified, there may be a malfunction on the wire harness side.

    4. Reconnect the N18 ECU connector.

    5. Initialize the power back door system Click here.

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

      Standard Voltage
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      N18-3 (CTYO) - Body ground W - Body ground Luggage compartment light drive output Luggage compartment light on Below 1 V
      Luggage compartment light off 11 to 14 V
      N18-20 (FUL) - Body ground W - Body ground Back door courtesy switch signal input Back door open Below 1 V
      Back door closed Pulse generation

      Tech Tips

      If the result is not as specified, the ECU may have a malfunction.

  3. CHECK REAR SEAT CLIMATE CONTROL ECU LH

    A01CDLIE19

    1. Disconnect the Y7 ECU connector.

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

      Standard Resistance
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      Y7-3 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω

      If the result is not as specified, there may be a malfunction on the wire harness side.

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

      Standard Voltage
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      Y7-13 (+B) - Body ground R - Body ground Battery power supply Always 11 to 14 V
      Y7-12 (IG) - Body ground P - Body ground IG power supply Engine switch on (IG) 11 to 14 V
      Engine switch off Below 1 V

      If the result is not as specified, there may be a malfunction on the wire harness side.

    4. Reconnect the Y7 ECU connector.

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

      Standard Voltage
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      Y7-9 (RSWM) - Body ground R - Body ground Reading light ON/OFF switch (for LH Side) signal input Reading light ON/OFF switch (for LH Side) pushed in Below 1 V
      Reading light ON/OFF switch (for LH Side) not pushed 11 to 14 V
      Y7-22 (RSWU) - Body ground W - Body ground Reading light dimmer switch (+) (for LH Side) signal input Reading light dimmer switch (+) (for LH Side) pushed in Below 1 V
      Reading light dimmer switch (+) (for LH Side) not pushed 11 to 14 V
      Y7-22 (RSWD) - Body ground B - Body ground Reading light dimmer switch (-) (for LH Side) signal input Reading light dimmer switch (-) (for LH Side) pushed in Below 1 V
      Reading light dimmer switch (-) (for LH Side) not pushed 11 to 14 V
      Y7-25 (RDLP) - Body ground Y - Body ground Reading light LH (spot light assembly LH) drive output Reading light LH (spot light assembly LH) on (100% brightness of light on state) Below 1 V
      Reading light LH (spot light assembly LH) on (Illuminate in light adjustment state) Pulse generation
      Reading light LH (spot light assembly LH) off 11 to 14 V

      Tech Tips

      If the result is not as specified, the ECU may have a malfunction.

  4. CHECK REAR SEAT CLIMATE CONTROL ECU RH

    A01CDLIE20

    1. Disconnect the X7 ECU connector.

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

      Standard Resistance
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      X7-3 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω

      If the result is not as specified, there may be a malfunction on the wire harness side.

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

      Standard Voltage
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      X7-13 (+B) - Body ground R - Body ground Battery power supply Always 11 to 14 V
      X7-12 (IG) - Body ground P - Body ground IG power supply Engine switch on (IG) 11 to 14 V
      Engine switch off Below 1 V

      If the result is not as specified, there may be a malfunction on the wire harness side.

    4. Reconnect the X7 ECU connector.

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

      Standard Voltage
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      X7-9 (RSWM) - Body ground R - Body ground Reading light ON/OFF switch (for RH Side) signal input Reading light ON/OFF switch (for RH Side) pushed in Below 1 V
      Reading light ON/OFF switch (for RH Side) not pushed 11 to 14 V
      X7-22 (RSWU) - Body ground W - Body ground Reading light dimmer switch (+) (for RH Side) signal input Reading light dimmer switch (+) (for RH Side) pushed in Below 1 V
      Reading light dimmer switch (+) (for RH Side) not pushed 11 to 14 V
      X7-22 (RSWD) - Body ground B - Body ground Reading light dimmer switch (-) (for RH Side) signal input Reading light dimmer switch (-) (for RH Side) pushed in Below 1 V
      Reading light dimmer switch (-) (for RH Side) not pushed 11 to 14 V
      X7-25 (RDLP) - Body ground Y - Body ground Reading light RH (spot light assembly RH) drive output Reading light RH (spot light assembly RH) on (100% brightness of light on state) Below 1 V
      Reading light RH (spot light assembly RH) on (Illuminate in light adjustment state) Pulse generation
      Reading light RH (spot light assembly RH) off 11 to 14 V

      Tech Tips

      If the result is not as specified, the ECU may have a malfunction.