Terminals Of Ecu

1. CHECK COMBINATION METER ASSEMBLY (METER ECU) 
   Fig 1: Identifying E19 Meter Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. Disconnect the E19 meter connector.
   2. Measure the voltage and resistance of the wire harness side connector.
      TERMINAL DESCRIPTION
      
      

      Symbols (Terminal No.)	Wiring Color	Terminal Description	Condition	Specified Condition
      TX1+ (E19-11) - Body ground	G - Body ground	Ground (ambient temperature sensor ground)	Always	10 kΩ or higher
      E (E19-12) - Body ground	BR - Body ground	Ground (fuel gauge ground)	Always	10 kΩ or higher
      IG+ (E19-21) - Body ground	B - Body ground	Ignition power supply	Ignition switch OFF	Below 1 V
      IG+ (E19-21) - Body ground	B - Body ground	Ignition power supply	Ignition switch ON	10 to 14 V
      B (E19-22) - Body ground	R - Body ground	Battery power supply	Always	10 to 14 V
      ET (E19-33) - Body ground	BR - Body ground	Ground (meter ground)	Always	Below 1 Ω
      SW3 (E19-34) - Body ground	0 - Body ground	Ground (rheostat ground)	Always	10 kΩ or higher
      ILL- (E19-35) - Body ground	BR - Body ground	Ground (illumination ground)	Always	Below 1 Ω

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

   3. Reconnect the E19 meter connector.
   4. Measure the voltage of the connector.
      TERMINAL DESCRIPTION
      
      

      Symbols (Terminal No.)	Wiring Color	Terminal Description	Condition	Specified Condition
      PBLT (E19-1) - Body ground	LG - Body ground	Front passenger side seat belt condition output signal	Seat belt indicator is OFF	10 to 14 V
      PBLT (E19-1) - Body ground	LG - Body ground	Front passenger side seat belt condition output signal	Seat belt indicator blinking	Below 1 V ↔ 10 to 14 V
      B (E19-3) - Body ground	Y - Body ground	Turn signal L	Ignition switch ON, turn signal LH indicator light OFF	Below 1 V
      B (E19-3) - Body ground	Y - Body ground	Turn signal L	Ignition switch ON, turn signal LH indicator light ON	10 to 14 V
      TIRE (E19-5) - Body ground	P - Body ground	Tire pressure warning signal	Tire pressure warning indicator ON	0.9 to 3.2 V
      TIRE (E19-5)- Body ground	P - Body ground	Tire pressure warning signal	Tire pressure warning indicator OFF	Below 0.9 V
      S (E19-6) - Body ground	L - Body ground	Low engine oil pressure warning signal	Low engine oil pressure warning light ON	Below 1 V
      S (E19-6) - Body ground	L - Body ground	Low engine oil pressure warning signal	Low engine ail pressure warning light OFF	10 to 14 V
      EFI (E19-8)- Body ground	R - Body ground	MIL	MIL ON	Below 4.2 V
      EFI (E19-8)- Body ground	R - Body ground	MIL	MIL OFF	10 to 14 V
      CHG- (E19-13) - Body ground	L - Body ground	MIL	MIL ON	Below 1.5 V
      CHG- (E19-13) - Body ground	L - Body ground	MIL	MIL OFF	10 to 14 V
      SW (E19-14) - Body ground	Y - Body ground	Brake fluid level signal	Brake fluid level warning light ON	Below 1 V
      SW (E19-14) - Body ground	Y - Body ground	Brake fluid level signal	Brake fluid level warning light OFF	10 to 14 V
      WLVL (E19-15) - Body ground	LG - Body ground	Washer level signal	Washer level warning light ON	Below 1 V
      WLVL (E19-15) - Body ground	LG - Body ground	Washer level signal	Washer level warning light OFF	10 to 14 V
      TEMP (E19-23)- Body ground	W - Body ground	Ambient temperature sensor signal	Ignition switch ON	1 to 2 V (25°C (77°F))
      L (E19-25)- Body ground	Y - Body ground	Fuel level signal	Ignition switch ON, fuel level is FULL	Below 1 V
      L (E19-25) - Body ground	Y - Body ground	Fuel level signal	Ignition switch ON, fuel level is EMPTY	4 to 7 V
      SW1 (E19-26) - Body ground	V - Body ground	Light control rheostat signal	Ignition switch ON	4 to 6 V
      SW2 (E19-27) - Body ground	GR - Body ground	Light control rheostat signal	Ignition switch ON, rheostat knob position MIN → MAX	Below 1 V → 4 to 6 V
      ILL+ (E19-28) - Body ground	G - Body ground	Illumination signal	Taillight OFF	Below 1 V
      ILL+ (E19-28) - Body ground	G - Body ground	Illumination signal	Taillight ON	10 to 14 V
      TC (E19-30) - Body ground	G - Body ground	Tail cancel switch signal	Ignition switch ON, tail cancel switch OFF	4 to 6 V
      TC (E19-30) - Body ground	G - Body ground	Tail cancel switch signal	Ignition switch ON, tail cancel switch ON	Below 1 V
      CANL (E19-31) - Body ground	W - Body ground	CAN communication line	Ignition switch ON	Pulse generation
      CANH (E19-32) - Body ground	G - Body ground	CAN communication line	Ignition switch ON	Pulse generation
      IND1 (E19-36) - Body ground	L - Body ground	Illumination signal	Light control rheostat position Mid.	Pulse generation
      IND2 (E19-37) - Body ground	LG - Body ground	Illumination signal	Light control rheostat position Mid.	Pulse generation
      SI (E19-38) - Body ground	V - Body ground	Speed signal (input)	Ignition switch ON, slowly turn wheel	Pulse generation
      +S (E19-39) - Body ground	V - Body ground	Speed signal (output) (4P-OUT)	Ignition switch ON, slowly turn wheel	Pulse generation
      B (E19-40) - Body ground	L - Body ground	Turn signal R	Ignition switch ON, turn signal RH indicator light OFF	Below 1 V
      B (E19-40) - Body ground	L - Body ground	Turn signal R	Ignition switch ON, turn signal RH indicator light ON	10 to 14 V

      If the result is not as specified, the combination meter may be malfunctioning.

      Fig 2: Identifying Combination Meter - Circuit Diagram (1 Of 3)

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 3: Identifying Combination Meter - Circuit Diagram (2 Of 3)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 4: Identifying Combination Meter - Circuit Diagram (3 Of 3)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Table of terminal connection