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ECM Terminal Arrangement

  1. Combination meter ASSY
    1. Input/output signal check
      G12589536Courtesy of SUBARU OF AMERICA, INC.
      1. With the connector connected, check each terminal by applying the tester probe from the back of the vehicle wiring harness connector.
      STANDARD VALUE SPECIFICATION

      Terminal No. (Terminal symbol) Input/Output Item Inspection conditions Standard value
      D7-1 (B) ←→Chassis ground Input Voltage Always 10 to 14 V
      D7-2 (IG) ←→Chassis ground Input Voltage IG OFF →ON 1 V or less →10 to 14 V
      D7-6 (CANH) ←→Chassis ground Input/Output Waveform Engine stop, IG ON Pulse generation
      D7-7 (CANL) ←→Chassis ground Input/Output Waveform Engine stop, IG ON Pulse generation
      D7-9 (ILL-) ←→Chassis ground Output Voltage IG ON, Light control rheostat OFF →ON 1 V or less →10 to 14 V
      D7-13 (P/SB) ←→Chassis ground Output Voltage IG ON, Passenger's seat occupied and seat belt not buckled →buckled 1 V or less →10 to 14 V
      D7-14 (S) ←→Chassis ground Input Voltage IG ON, Engine pressure warning light ON →OFF 1 V or less →10 to 14 V
      D7-17 (LBL) ←→Chassis ground Input Voltage IG ON, Brake fluid level warning light ON →OFF 1 V or less →10 to 14 V
      D7-18 (ILL+) ←→Chassis ground Input Voltage IG ON, Security indicator light Blinking →OFF 1 V or less →10 to 14 V
      D7-19 (LVWG) ←→Chassis ground Input Voltage IG ON, Head light leveling warning light ON →OFF 1 V or less →10 to 14 V
      D7-20 (ES1) ←→Chassis ground - Resistance Always Less than 1 Ω
      D7-21 (LR) ←→Chassis ground Input Voltage IG ON, Turn signal light RH blinking →Turn signal light RH OFF 1 V or less←→10 to 14 V → 1 V or less
      D7-22 (LL) ←→Chassis ground Input Voltage IG ON, Turn signal light LH ON →Turn signal light LH OFF 1 V or less ←→10 to 14 V →1 V or less
      D7-23 (+DP) ←→D7-29(2) Input Resistance ENTER switch BACK switch All OFF Approx. 100000 Ω
      ENTER switch ON Less than 3 Ω
      BACK switch ON 1000Ω
      D7-24 (TAM) ←→D7-25 Input Voltage IG ON, Ambient temperature 25°C 1.35 to 1.75 V
      D7-26 (+DP2) ←→D7-29(2) Input Resistance ↑←→
      All OFF Approx. 100000 Ω
      ON Approx. 330 Ω
      ON Less than 3 Ω
      ON Approx. 31000 Ω
      ↓  ON Approx. 1000 Ω
      D7-27 (L) ←→D7-28 Input Voltage Fuel F →E 1 V or less →4.5 to 9 V
      D7-29 (TFT SW GND) ←→Chassis ground (2) - Resistance Always Less than 1 Ω
      D7-30 (E) ←→Chassis ground - Resistance Always Less than 1 Ω
      D7-31 (TR) ←→Chassis ground - Resistance Light control rheostat upper fully open →Light control rheostat lower fully open 510Ω →100 Ω
      D7-32 (T) ←→Chassis ground - Voltage IG OFF →ON 1 V or less →10 to 14 V
      D7-33 (TC) ←→Chassis ground - Resistance Light control rheostat upper fully open →Light control rheostat lower fully open Less than 1 Ω→10 kΩ or more
      D7-34 (DISP) ←→Chassis ground (1) - Resistance DISP switch ON →OFF Less than 1 Ω→10 kΩ or more
      D7-35 (CS) ←→Chassis ground Input Resistance Speed unit display changeover switch ON: km/h OFF: MPH Less than 1 Ω→10 kΩ or more
      D7-36 (TRIP) ←→Chassis ground - Resistance ODO/TRIP switch ON →OFF Less than 1 Ω→10 kΩ or more
      D7-37 (DBKL) ←→Chassis ground Input Voltage IG ON, driver's seat belt not buckled →Buckled 1 V or less →10 to 14 V
      D7-38 (PBKL) ←→Chassis ground Input Voltage IG ON, passenger's seat occupied, and seat belt not buckled →buckled 1 V or less →11 to 14 V
      D7-40 (ES2) ←→Chassis ground - Resistance Always Less than 1 Ω
      (1) Normal meter

      (2) TFT meter