Meter / Gauge System (For Sedan) Terminals Of Ecu

Vehicle Interior. Yaris. Ncp93, 131
Meter Gauge Display. Yaris. Ncp93, 131

  1. COMBINATION METER ASSEMBLY

  1. MAIN BODY ECU

  1. COMBINATION METER INTERNAL CIRCUIT

Meter / Gauge System (For Sedan) -- Terminals Of Ecu



COMBINATION METER ASSEMBLY

Yaris. Ncp93, 131.Meter Gauge Display.Meter / Gauge System (For Sedan).Meter / Gauge System (For Sedan) Terminals Of Ecu

  1. Disconnect the D1 combination meter assembly connector.

  2. Measure the voltage and resistance of the wire harness side connector.

    Terminal No. (Symbol)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    D1-1 (IG2) - Body ground
    		B - Body ground
    		Ignition switch signal
    		Ignition switch OFF → ON
    		Below 1 V → 11 to 14 V
    D1-2 (ECU-B) - Body ground
    		L - Body ground
    		Battery
    		Always
    		11 to 14 V
    D1-24 (ET) - Body ground
    		BR - Body ground
    		Ground
    		Always
    		Below 1 Ω
    If the result is not as specified, there may be a malfunction in the wire harness.

  3. Disconnect the D76 combination meter assembly connector.



  4. Measure the voltage of the wire harness side connector.

    Terminal No. (Symbol)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    D1-3 (FUEL) - Body ground
    		V - Body ground
    		Fuel level signal
    		Ignition switch ON
    		 11 to 14 V
    D1-6 (TIRE)*1 - Body ground
    		BE - Body ground
    		Tire pressure warning signal
    		Ignition switch ON,
    Tire pressure warning light ON
    		0.9 to 3.2 V
    Ignition switch ON,
    Tire pressure warning light OFF
    		3.2 V or higher
    D1-7 (ILL-) - Body ground
    		GR - Body ground
    		Light control rheostat signal
    		Ignition switch OFF → ON
    		Pulse generation
    (See waveform 1)
    D1-14 (ILL+) - Body ground
    		G - Body ground
    		Illumination signal
    		Light control switch OFF → ON
    		Below 1 V → 11 to 14 V
    D1-15 (TC) - Body ground
    		Y - Body ground
    		Tail cancel switch signal
    		Tail cancel switch OFF → ON
    		Below 1 V → 11 to 14 V
    D1-16 (+S) - Body ground
    		SB - Body ground
    		Vehicle speed signal (Output)
    		Driving at approx. 20 km/h (12 mph)
    		Pulse generation
    (See waveform 2)
    D1-17 (SI) - Body ground
    		P - Body ground
    		Vehicle Speed signal (Input)
    		Driving at approx. 20 km/h (12 mph)
    		Pulse generation
    (See waveform 2)
    D1-20 (CANH) - Body ground
    		G - Body ground
    		CAN communication line
    		Ignition switch ON
    		Pulse generation
    D1-21 (CANL) - Body ground
    		W - Body ground
    		CAN communication line
    		Ignition switch ON
    		Pulse generation
    D76-1 (CHG) - Body ground
    		SB*2 - Body ground
    		Charge warning light signal
    		Ignition switch ON
    Engine start
    Charge warning light
    OFF → ON
    		11 to 14 V → Below 1 V
    L*3 - Body ground
    D76-2 (SW) - Body ground
    		V - Body ground
    		Brake fluid level warning light signal
    		Ignition switch ON
    Brake fluid level warning light
    ON → OFF
    		Below 1 V → 11 to 14 V
    D76-4 (EFI) - Body ground
    		B - Body ground
    		MIL signal
    		Ignition switch ON
    MIL ON → OFF
    		Below 1 V → 11 to 14 V
    D76-7 (FOG)*4 - Body ground
    		R - Body ground
    		Front fog signal
    		Ignition switch ON
    Front fog light switch
    OFF → ON
    		Below 1 V → 11 to 14 V
    D76-8 (TURN L) - Body ground
    		LG - Body ground
    		Turn signal LH signal
    		Ignition switch ON
    Turn signal LH indicator light
    OFF → ON → OFF
    		Below 1 V → 11 to 14 V → Below 1 V
    D76-9 (PBLT) - Body ground
    		BE - Body ground
    		Seat belt warning light signal (Passenger side)
    		Ignition switch ON
    Front passenger seat belt warning light OFF → ON → OFF
    		Below 1 V → 11 to 14 V → Below 1 V
    D76-10 (WLVL)*5 - Body ground
    		 W - Body ground
    		Washer level warning signal
    		Ignition switch ON
    Washer level warning light ON → OFF
    		Below 1 V → 11 to 14 V
    D76-11 (BEAM-) - Body ground
    		P - Body ground
    		HI-BEAM indicator signal (-)
    		Headlight dimmer switch (Hi-BEAM) Hi → Lo
    		Below 1 V → 11 to 14 V
    D76-12 (S) - Body ground
    		Y - Body ground
    		Oil pressure signal
    		OIL / P warning light ON → OFF
    		Below 1 V → 11 to 14 V
    D76-13 (HEAD)*6 - Body ground
    		L - Body ground
    		HEAD light indicator signal
    		Light control switch OFF → ON
    		Below 1 V → 11 to 14 V
    D76-14 (BEAM+) - Body ground
    		GR - Body ground
    		HI-BEAM indicator signal (+)
    		BEAM indicator light OFF → ON
    		Below 1 V → 11 to 14 V
    D76-15 (TURN R) - Body ground
    		BR - Body ground
    		Turn signal RH signal
    		Turn signal RH indicator light OFF → ON → OFF
    		Below 1 V → 11 to 14 V → Below 1 V
    D76-16 (IND)*7 - Body ground
    		G - Body ground
    		Taillight indicator signal
    		Light control switch OFF → ON
    		Below 1 V → 11 to 14 V
    D76-17 (ODO) - Body ground
    		L - Body ground
    		ODO/TRIP switch signal
    		Ignition switch ON
    		5 V
    D76-18 (CLK) - Body ground
    		R - Body ground
    		Clock switch signal
    		Ignition switch ACC
    		5 V
    D76-19 (E1) - Body ground
    		GR - Body ground
    		Ground
    		Ignition switch ON
    		Below 1 V
    1. *1: w/ Tire Pressure Warning System
    2. *2: w/ Daytime Running Light
    3. *3: w/o Daytime Running Light
    4. *4: w/ Front Fog Light
    5. *5: w/ Washer Level Warning
    6. *6: for U.S.A.
    7. *7: for Canada
    If the result is not as specified, the combination meter assembly may be malfunctioning.


      Yaris. Ncp93, 131.Meter Gauge Display.Meter / Gauge System (For Sedan).Meter / Gauge System (For Sedan) Terminals Of Ecu

    1. Waveform 1: Using an oscilloscope

      Terminal Connections
      		D1-7 (ILL-) - Body Ground
      Tool Setting
      		5 V/DIV, 50 ms/DIV
      Condition
      		Ignition switch ON


      2. Yaris. Ncp93, 131.Meter Gauge Display.Meter / Gauge System (For Sedan).Meter / Gauge System (For Sedan) Terminals Of Ecu

    2. Waveform 2: Using an oscilloscope

      Terminal Connections
      		D1-16 (+S) - Body Ground
      D1-17 (SI) - Body Ground
      Tool Setting
      		5 V/DIV, 20 ms/DIV
      Condition
      		Driving at approximately 12 mph (20 km/h)
      HINT:
      As the vehicle speed increases, the cycle of the signal waveform narrows.

MAIN BODY ECU

Yaris. Ncp93, 131.Meter Gauge Display.Meter / Gauge System (For Sedan).Meter / Gauge System (For Sedan) Terminals Of Ecu


Text in Illustration
*1
Rear view of Main Body ECU
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-

Yaris. Ncp93, 131.Meter Gauge Display.Meter / Gauge System (For Sedan).Meter / Gauge System (For Sedan) Terminals Of Ecu


Text in Illustration
*1
Front view of Main Body ECU
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-

  1. Disconnect the 4A, 4D and 4E main body ECU connectors.

  2. Measure the resistance of the wire harness side connectors.

    Terminal No. (Symbol)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    4A-5 (RRCY) - Body ground
    		G - Body ground
    		Rear door courtesy switch signal (LH and RH)
    		Rear door (LH and RH) CLOSED → OPEN
    		10 kΩ or higher → Below 1 Ω
    4A-7 (LGCY) - Body ground
    		SB - Body ground
    		Luggage door courtesy switch signal
    		Luggage door CLOSED → OPEN
    		10 kΩ or higher → Below 1 Ω
    4A-21 (DCTY) - Body ground
    		R - Body ground
    		Front door courtesy switch signal (Driver Side)
    		Front door (Driver Side) CLOSED → OPEN
    		10 kΩ or higher → Below 1 Ω
    4A-24 (PCTY) - Body ground
    		L - Body ground
    		Front door courtesy switch signal (Passenger Side)
    		Front door (Passenger Side) CLOSED → OPEN
    		10 kΩ or higher → Below 1 Ω
    4D-7 (KSW) - Body ground
    		Y - Body ground
    		Key unlock warning switch signal
    		Key inserted → removed
    		10 kΩ or higher → Below 1 Ω
    4E-17 (GND1) - Body ground
    		W-B - Body ground
    		Ground
    		Always
    		Below 1 Ω
    If the result is not as specified, there may be a malfunction in the wire harness.

  3. Reconnect the main body ECU connectors.

  4. Measure the voltage of the wire harness side connectors.

    Terminal No. (Symbol)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    4C-2 (PKB) - Body ground
    		Y - Body ground
    		Parking brake signal
    		Parking brake warning light ON → OFF
    		Below 1 V → 11 to 14 V
    D33-22 (CANL) - Body ground
    		W - Body ground
    		CAN communication line
    		Ignition switch ON
    		Pulse generation
    D33-23 (CANH) - Body ground
    		R - Body ground
    		CAN communication line
    		Ignition switch ON
    		Pulse generation
    If the result is not as specified, there may be a malfunction in the wire harness.

COMBINATION METER INTERNAL CIRCUIT

Yaris. Ncp93, 131.Meter Gauge Display.Meter / Gauge System (For Sedan).Meter / Gauge System (For Sedan) Terminals Of Ecu


Yaris. Ncp93, 131.Meter Gauge Display.Meter / Gauge System (For Sedan).Meter / Gauge System (For Sedan) Terminals Of Ecu


Yaris. Ncp93, 131.Meter Gauge Display.Meter / Gauge System (For Sedan).Meter / Gauge System (For Sedan) Terminals Of Ecu


Connectors
Terminal No.
Wire Harness Side
D1
1
Ignition switch
2
Battery
3
Fuel sender gauge assembly
6*1
Tire pressure warning ECU
7
Light control rheostat
14
Taillight relay
15
Light control rheostat
16
Other ECU
17
Speedometer sensor
20
CAN communication line
21
CAN communication line
24
Body ground
D76
1
Generator
2
Brake fluid level warning switch
4
ECM
7*2
Fog light relay
8
Turn signal flasher relay
9
Hazard warning signal switch assembly
10*3
Washer level warning switch
11
Headlight dimmer switch
12
Engine oil pressure switch
13*4
Headlight dimmer switch
14
Headlight dimmer switch
15
Turn signal flasher relay
16*5
Taillight relay
17
Hazard warning signal switch assembly
18
Hazard warning signal switch assembly
19
Hazard warning signal switch assembly
  1. *1: w/ Tire Pressure Warning System
  2. *2: w/ Front Fog Light
  3. *3: w/ Washer Level Warning
  4. *4: for U.S.A.
  5. *5: for Canada