CXPI COMMUNICATION SYSTEM TERMINALS OF ECU

Note


  • After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work.

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  • When disconnecting the cable from the negative (-) auxiliary battery terminal while performing repairs, some systems need to be initialized after the cable is reconnected.

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  1. CHECK DRIVER SIDE JUNCTION BLOCK ASSEMBLY AND MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)


    1. Remove the main body ECU (multiplex network body ECU).

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      B004CRXC11
      *1 Main Body ECU (Multiplex Network Body ECU) - -

    2. Connect the driver side junction block assembly.

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      A-11 (GND1) - Body ground None - Body ground Ground Always Below 1 Ω
      A-31 (BECU) - Body ground None - Body ground Auxiliary battery power supply Power switch off 11 to 14 V
      A-30 (ACC) - Body ground None - Body ground ACC power supply Power switch on (ACC) 11 to 14 V
      Power switch off Below 1 V
      A-32 (IG) - Body ground None - Body ground IG power supply Power switch on (IG) 11 to 14 V
      Power switch off Below 1 V

  2. NO. 1 SEMICONDUCTOR POWER INTEGRATION ECU

    B004AQKC06
    *a

    Component without harness connected

    (No. 1 semiconductor power integration ECU)

    		 - -
    Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
    A79-1 (+B) - Body ground R - Body ground Auxiliary battery power supply Power switch off 8 to 14 V
    A80-1 (L) - Body ground G - Body ground No. 1 headlight ECU sub-assembly LH power supply Power switch off Below 3 V
    Power switch on (IG) 8 V or higher
    A80-2 (HI) - Body ground R - Body ground No. 1 headlight ECU sub-assembly RH power supply Power switch off Below 3 V
    Power switch on (IG) 8 V or higher
    A80-3 (L) - Body ground W - Body ground Heater accessory assembly (heater water pump assembly) power supply Power switch on (IG), heater accessory assembly (heater water pump assembly) off Below 3 V
    Power switch on (IG), heater accessory assembly (heater water pump assembly) on 8 V or higher
    A80-6 (GND2) - Body ground W-B - Body ground Ground Always Below 1 Ω
    A80-9 (IG) - Body ground L - Body ground Ignition power supply Power switch off Below 1.5 V
    Power switch on (IG) 8 to 14 V
    A80-13 (GND1) - Body ground W-B - Body ground Ground Always Below 1 Ω
    A80-14 (-S) - Body ground R - Body ground No. 1 headlight ECU sub-assembly operation signal input Power switch off 6 V or higher
    Power switch on (IG) Below 1.5 V
    A80-15 (-S) - Body ground V - Body ground No. 1 headlight ECU sub-assembly sub-assembly operation signal input Power switch off 6 V or higher
    Power switch on (IG) Below 1.5 V

    1. Check for pulses according to the value(s) in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      A80-7 (CXPI) - Body ground SB - Body ground CXPI communication line Power switch on (IG) Pulse generation

  3. NO. 2 SEMICONDUCTOR POWER INTEGRATION ECU (w/ PTC Heater)

    B004AQKC07
    *a

    Component without harness connected

    (No. 2 semiconductor power integration ECU)

    		 - -
    Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
    A81-1 (+B) - Body ground L - Body ground Auxiliary battery power supply Power switch off 8 to 14 V
    P133-1 (L) - Body ground B - Body ground Quick heater assembly (PTC1) power supply Power switch on (IG), quick heater assembly (PTC1) off Below 3 V
    Power switch on (IG), quick heater assembly (PTC1) on 8 V or higher
    P133-2 (L) - Body ground W - Body ground Quick heater assembly (PTC2) power supply Power switch on (IG), quick heater assembly (PTC2) off Below 3 V
    Power switch on (IG), quick heater assembly (PTC2) on 8 V or higher
    P133-9 (IG) - Body ground LA-L - Body ground Ignition power supply Power switch off Below 1.5 V
    Power switch on (IG) 8 to 14 V
    P133-13 (GND1) - Body ground LA - Body ground Ground Always Below 1 Ω

    1. Check for pulses according to the value(s) in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      P133-7 (CXPI) - Body ground W - Body ground CXPI communication line Power switch on (IG) Pulse generation

  4. NO. 3 SEMICONDUCTOR POWER INTEGRATION ECU

    B004AQKC08
    *a

    Component without harness connected

    (No. 3 semiconductor power integration ECU)

    		 - -
    Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
    b11-1 (+B) - Body ground B - Body ground Auxiliary battery power supply Power switch off 8 to 14 V
    X99-1 (OUT) - Body ground W - Body ground Stop lights, high mounted stop light output Brake pedal released Below 3 V
    Brake pedal depressed 8 V or higher
    X99-2 (L) - Body ground R - Body ground Window defogger output Power switch on (IG), window defogger switch off Below 3 V
    Power switch on (IG), window defogger switch on 8 V or higher
    X99-4 (L) - Body ground LA-R - Body ground Back-up output Power switch on (READY), shift lever in any position other than R Below 3 V
    Power switch on (READY), shift lever in R 8 V or higher
    X99-6 (GND2) - Body ground LA - Body ground Ground Always Below 1 Ω
    X99-9 (IG) - Body ground LA-B - Body ground Ignition power supply Power switch off Below 1.5 V
    Power switch on (IG) 8 to 14 V
    X99-10 (STP) - Body ground R - Body ground Stop light operation signal input Brake pedal released Below 1.5 V
    Brake pedal depressed 6 V or higher
    X99-11 (+S) - Body ground L - Body ground Back-up light operation signal input Power switch on (READY), shift lever in any position other than R Below 1.5 V
    Power switch on (READY), shift lever in R 6 V or higher
    X99-13 (GND1) - Body ground LA - Body ground Ground Always Below 1 Ω
    X99-14 (ACC) - Body ground BE - Body ground ACC stop light operation signal input Power switch off 6 V or higher
    Power switch on (IG) Below 1.5 V
    X99-16 (L) - Body ground LA-P - Body ground Rear taillights output Rear taillights not illuminated Below 3 V
    Rear taillights illuminated 8 V or higher

    1. Check for pulses according to the value(s) in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      X99-7 (CXPI) - Body ground V - Body ground CXPI communication line Power switch on (IG) Pulse generation