POWER INTEGRATION 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) from the driver side junction block assembly.

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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. CHECK NO. 1 SEMICONDUCTOR POWER INTEGRATION ECU

    B004AQKC06
    *a

    Component without harness connected

    (No. 1 semiconductor power integration ECU)

    		 - -

    1. Disconnect the cable from the negative (-) auxiliary battery terminal.

    2. Disconnect the A79 and A80 No. 1 semiconductor power integration ECU connectors.

    3. Connect the cable to the negative (-) auxiliary battery terminal.

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

      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 operation signal input Power switch off 6 V or higher
      Power switch on (IG) Below 1.5 V

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

    B004AQKC07
    *a

    Component without harness connected

    (No. 2 semiconductor power integration ECU)

    		 - -

    1. Disconnect the cable from the negative (-) auxiliary battery terminal.

    2. Disconnect the A81 and P133 No. 2 semiconductor power integration ECU connectors.

    3. Connect the cable to the negative (-) auxiliary battery terminal.

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

      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

  4. CHECK NO. 3 SEMICONDUCTOR POWER INTEGRATION ECU

    B004AQKC08
    *a

    Component without harness connected

    (No. 3 semiconductor power integration ECU)

    		 - -

    1. Disconnect the cable from the negative (-) auxiliary battery terminal.

    2. Disconnect the b11 and X99 No. 3 semiconductor power integration ECU connectors.

    3. Connect the cable to the negative (-) auxiliary battery terminal.

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

      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 taillight output Rear taillights not illuminated Below 3 V
      Rear taillights illuminated 8 V or higher