METER / GAUGE SYSTEM TERMINALS OF ECU


  1. CHECK NO. 1 METER ECU

    A000VRME02

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

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      L124-1 (B) - Body ground G - Body ground Turn indicator light LH signal Power switch on (IG), turn indicator light LH off Below 1 V
      Power switch on (IG), turn indicator light LH blinks Alternating between below 1 and 11 to 14 V
      L124-4 (A/B) - Body ground B - Body ground ODO/TRIP switch signal Power switch on (IG), ODO/TRIP switch on Below 1 V
      Power switch on (IG), ODO/TRIP switch off 4.4 to 5.5 V
      L124-5 (RSET) - Body ground BR - Body ground RESET switch signal Power switch on (IG), RESET switch on Below 1 V
      Power switch on (IG), RESET switch off 4.4 to 5.5 V
      L124-7 (RHDW) - Body ground L - Body ground Light control rheostat DOWN switch signal Power switch on (IG), Light control rheostat DOWN switch on Below 1 V
      Power switch on (IG), Light control rheostat DOWN switch off 4.4 to 5.5 V
      L124-8 (RHUP) - Body ground R - Body ground Light control rheostat UP switch signal Power switch on (IG), Light control rheostat UP switch on Below 1 V
      Power switch on (IG), Light control rheostat UP switch off 4.4 to 5.5 V
      L124-9 (SI) - Body ground L - Body ground Speed signal (Input) Power switch on (IG) and turn the wheel slowly Pulse generation (See waveform)
      L124-10 (+S) - Body ground V - Body ground Speed signal (Output) Power switch on (IG) and turn the wheel slowly Pulse generation (See waveform)
      L124-11 (EFI) - Body ground R - Body ground MIL MIL on Below 1 to 4.2 V
      MIL off 11 to 14 V
      L124-12 (B) - Body ground Y - Body ground Turn indicator light RH signal Power switch on (IG), turn indicator light RH off Below 1 V
      Power switch on (IG), turn indicator light RH blinks Alternating between below 1 and 11 to 14 V
      L124-13 (B) - Body ground P - Body ground +B power supply Always 11 to 14 V
      L124-14 (IG2) - Body ground L - Body ground IG power supply Power switch off Below 1 V
      Power switch on (IG) 11 to 14 V
      L124-16 (ILL-) - Body ground LG - Body ground Illumination signal Power switch on (IG) Pulse generation
      L124-17 (E2) - Body ground W-B - Body ground Ground (Power ground) Always Below 1 Ω
      L124-18 (ES) - Body ground BR - Body ground Ground Always Below 1 Ω
      L124-24 (EPB*) - Body ground L - Body ground Parking brake switch signal Power switch on (IG), parking brake switch on Below 1.5 V
      Power switch on (IG), parking brake switch off 11 to 14 V

      • EPB*: Electric Parking Brake System

    2. A00104FE08
      *1 Waveform:

      Using an oscilloscope, check the waveform.

      Waveform (Reference)
      Item Condition
      Terminal No. (Symbols)

      L124-10 (+S) - Body ground

      L124-9 (SI) - Body ground
      Tool setting 5 V/DIV., 20 msec./DIV.
      Vehicle condition

      Power switch on (IG) and turn the wheel slowly

      Driving at approximately 20 km/h (12 mph)

      Tech Tips

      As vehicle speed increases, the cycle of the signal waveform narrows.

  2. FRONT MULTIPLEX NETWORK LIGHT ECU (FRONT CONTROLLER)

    A000X8VE13

    1. Disconnect the A50 and A52 front controller connectors.

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

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      A52-5 (ALTB) - Body ground L - Body ground +B power supply Always 11 to 14 V
      A52-1 (BATB) - Body ground P - Body ground +B power supply Always 11 to 14 V
      A50-1 (FMB3) - Body ground LG - Body ground +B power supply Always 11 to 14 V
      A50-5 (FMIG) - Body ground Y - Body ground IG power supply Power switch off Below 1 V
      Power switch on (IG) 11 to 14 V
      A50-2 (E) - Body ground W-B - Body ground Ground Always Below 1 Ω

    3. Reconnect the A50 and A52 front controller connectors.

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

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      A52-10 (MOL) - A52-20 (MOLE) L - W Engine oil level sensor signal Engine oil level sensor on Below 1 V
      Engine oil level sensor off 11 to 14 V
      A52-11 (MOPS) - Body ground R - Body ground Engine oil pressure switch signal Power switch on (IG), engine oil pressure warning display on Below 1 V
      Power switch on (IG), engine oil pressure warning display off 11 to 14 V

  3. CHECK LUGGAGE ROOM JUNCTION BLOCK (REAR JUNCTION BLOCK ECU)

    A000YBGE10
    *1 LF

    1. Disconnect the LA, LD and LG luggage room junction block connectors.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      LA-29 (SG) - Body ground W-B - Body ground Ground Always Below 1 Ω
      LA-43 (PGND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      LD-4 (MPXB) - LA-29 (SG) R - W-B ECU power supply Always 11 to 14 V
      LG-1 (FUEL) - LA-29 (SG) W - W-B +B power supply Always 11 to 14 V

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

    3. Reconnect the LA, LD and LG luggage room junction block connectors.

    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
      S61-7 (FR) - Body ground SB - Body ground Fuel level signal Power switch on (IG), fuel level F Below 1 V
      Power switch on (IG), fuel level E 4.5 to 9 V
      S61-18 (FE) - Body ground LG - Body ground Ground (Fuel ground) Always Below 1 Ω

  4. CHECK STEERING PAD SWITCH

    A000ZA1E03

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

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      z74-12 - Body ground R - Body ground +B power supply Always 11 to 14 V