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POWER INTEGRATION SYSTEM TERMINALS OF ECU

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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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  • When disconnecting the cable, some systems need to be initialized after the cable is reconnected.

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


    1. B004TKOE04

      Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.

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    2. Connect the instrument panel junction block assembly connectors.

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

      Terminal No. (Symbol) 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

    4. Install the main body ECU (multiplex network body ECU).

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      G17-5 (CXP1) - Body ground SB - Body ground CXPI communication line Power switch on (IG) Pulse generation
  2. B004XGDE15

    CHECK NO. 1 SEMICONDUCTOR POWER INTEGRATION ECU


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

    2. Disconnect the A61 and A66 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
      A66-1 (+B) - Body ground R - Body ground Auxiliary battery power supply Power switch off 8 to 14 V
      A61-1 (L) - Body ground G - Body ground Headlight ECU sub-assembly LH power supply Power switch off Below 3 V
      Power switch on (IG) 8 V or higher
      A61-2 (HI) - Body ground R - Body ground Headlight ECU sub-assembly RH power supply Power switch off Below 3 V
      Power switch on (IG) 8 V or higher
      A61-6 (GND2) - Body ground

      W-B - Body ground*1

      LA - Body ground*2

      		 Ground Always Below 1 Ω
      A61-9 (IG) - Body ground LA-R - Body ground IG power supply Power switch off Below 1.5 V
      Power switch on (IG) 8 to 14 V
      A61-13 (GND1) - Body ground

      LA - Body ground*1

      W-B - Body ground*2

      		 Ground Always Below 1 Ω
      A61-14 (-S) - Body ground R - Body ground Headlight ECU sub-assembly operation signal input Power switch off 6 V or higher
      Power switch on (IG) Below 1.5 V
      A61-15 (-S) - Body ground B - Body ground Headlight ECU sub-assembly operation signal input Power switch off 6 V or higher
      Power switch on (IG) Below 1.5 V
      A61-16 (L) - Body ground LA-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

      *1: for LHD

      *2: for RHD

    5. Reconnect the A61 and A66 No. 1 semiconductor power integration ECU connectors.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      A61-7 (CXPI) - Body ground SB - Body ground CXPI communication line Power switch on (IG) Pulse generation
  3. B004XGDE16

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


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

    2. Disconnect the A67 and G97 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
      A67-1 (+B) - Body ground L - Body ground Auxiliary battery power supply Power switch off 8 to 14 V
      G97-1 (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
      G97-2 (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
      G97-9 (IG) - Body ground LA-B - Body ground IG power supply Power switch off Below 1.5 V
      Power switch on (IG) 8 to 14 V
      G97-13 (GND1) - Body ground W-B - Body ground Ground Always Below 1 Ω

    5. Reconnect the A67 and G97 No. 2 semiconductor power integration ECU connectors.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      G97-7 (CXPI) - Body ground W - Body ground CXPI communication line Power switch on (IG) Pulse generation
  4. B004XGDE17

    CHECK NO. 3 SEMICONDUCTOR POWER INTEGRATION ECU


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

    2. Disconnect the P11 and L111 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
      P11-1 (+B) - Body ground R - Body ground Auxiliary battery power supply Power switch off 8 to 14 V
      L111-1 (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
      L111-2 (L) - Body ground R - Body ground Rear 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
      L111-4 (L) - Body ground R - Body ground Back-up light 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
      L111-6 (GND2) - Body ground LA - Body ground Ground Always Below 1 Ω
      L111-9 (IG) - Body ground B - Body ground IG power supply Power switch off Below 1.5 V
      Power switch on (IG) 8 to 14 V
      L111-10 (STP) - Body ground LA-R - Body ground Stop light operation signal input Brake pedal released Below 1.5 V
      Brake pedal depressed 6 V or higher
      L111-11 (+S) - Body ground R - 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
      L111-13 (GND1) - Body ground LA - Body ground Ground Always Below 1 Ω
      L111-14 (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
      L111-15 (ESSI) - Body ground GR - Body ground Emergency brake light operation signal input Power switch off 6 V or higher
      Power switch on (IG) Below 1.5 V
      L111-16 (L) - Body ground BE - Body ground Taillights output Taillights not illuminated Below 3 V
      Taillights illuminated 8 V or higher
      L111-17 (TAIL) - Body ground P - Body ground Taillights output Taillights not illuminated Below 3 V
      Taillights illuminated 8 V or higher
      L111-18 (L) - Body ground* GR - Body ground Rear fog light output Taillights illuminates, rear fog light turn off → illuminate Below 3 V → 8 V or higher
      L111-19 (L) - Body ground* R - Body ground Rear fog light output Taillights illuminates, rear fog light turn off → illuminate Below 3 V → 8 V or higher

      *: w/ Rear Fog Light

    5. Reconnect the P11 and L111 No. 3 semiconductor power integration ECU connectors.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      L111-7 (CXPI) - Body ground V - Body ground CXPI communication line Power switch on (IG) Pulse generation