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Terminals Of Ecu [08/2014 - ]

  1. COMBINATION METER ASSEMBLY 
    Fig 1: Identifying Combination Meter Assembly Connector Terminal Identification
    GTY327055Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Measure the voltage and resistance according to the value(s) in the table below.
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      L27-1 (TIMR) - Body ground G - Body ground Charge timer indicator light signal Power switch on (IG), charge timer indicator light off Below 1 V
      Power switch on (IG), charge timer indicator light on 11 to 14 V
      L27-2 (TC O) - Body ground G - Body ground Pattern select switch assembly signal (Unit change switch) Unit change switch not pressed 11 to 14 V
      Unit change switch pressed Below 1 V
      L27-3 (TIRE) - Body ground G - Body ground Tire pressure warning light signal Power switch on (IG), Tire pressure warning light off 3.2 V or higher
      Power switch on (IG), Tire pressure warning light on Below 3.2 V
      L27-4 (LST1) - Body ground B - Body ground Fuel lid operation signal Power switch on (IG), fuel lid closed Below 1 V
      Power switch on (IG), fuel lid opened Pulse generation
      L27-5 (S) - Body ground R - Body ground Oil pressure switch signal Power switch on (IG), engine not operating Below 1 V
      Power switch on (IG), engine operating 11 to 14 V
      L27-6 (LVWG) - Body ground
      *4      		 L - Body ground Headlight leveling indicator light signal Power switch on (IG), headlight leveling indicator light off 11 to 14 V
      Power switch on (IG), headlight leveling indicator light on Below 1 V
      L27-7 (+S) - Body ground V - Body ground Speed signal for other systems (Output) Power switch on (IG), front wheel turns slowly Pulse generation
      (See waveform 1)
      L27-8 (SI) - Body ground V - Body ground Speed signal (Input) Power switch on (IG), front wheel turns slowly Pulse generation
      (See waveform 1)
      L27-9 (E2) - Body ground G - Body ground Ground (Coolant temperature sensor ground) Always Below 1 Ω
      L27-10 (CANH) - Body ground P - Body ground CAN communication signal - -
      L27-11 (CANL) - Body ground W - Body ground CAN communication signal - -
      L27-12 (HOUR) - Body ground B - Body ground Satellite switch set signal (Hour adjust switch) Hour adjust switch not pressed 11 to 14 V
      Hour adjust switch pressed Below 1 V
      L27-13 (MIN) - Body ground B - Body ground Satellite switch set signal (Minute adjust switch) Minute adjust switch not pressed 11 to 14 V
      Minute adjust switch pressed Below 1 V
      L27-14 (L) - Body ground B - Body ground Fuel level signal Power switch on (IG), fuel level warning light off Below 1 V
      Power switch on (IG), fuel level warning light on 3 to 7 V
      L27-15 (ES 2) - Body ground W - Body ground Ground (Fuel ground) Always Below 1 Ω
      L27-16 (TWS3) - Body ground B - Body ground Coolant temperature sensor signal Power switch on (IG), coolant temperature hot warning light on 4.5 to 5.5 V
      Power switch on (IG), coolant temperature hot warning light off Below 1 V
      L27-17 (RST) - Body ground R - Body ground Satellite Switch Set signal (Set switch) Set switch not pressed 11 to 14 V
      Set switch pressed Below 1 V
      L27-18 (B) - Body ground R - Body ground Auxiliary battery Power switch off 11 to 14 V
      L27-19 (IG+) - Body ground L - Body ground Power switch signal Power switch off Below 1 V
      Power switch on (IG) 11 to 14 V
      L27-20 (IG2) - Body ground G - Body ground Power switch signal Power switch off Below 1 V
      Power switch on (IG) 11 to 14 V
      L27-21 (PBLT) - Body ground Y - Body ground Front passenger side seat belt warning light signal Power switch on (IG), front passenger side seat belt warning light off 11 to 14 V
      Power switch on (IG), front passenger side seat belt warning light blinks Below 1 V ←→ 11 to 14 V
      L27-22 (LP) - Body ground B - Body ground Security indicator light signal Power switch on (IG), security indicator light off Below 2 V
      Security indicator light blinks Below 1 V ←→ 11 to 14 V
      L27-25 (EFI) - Body ground LG - Body ground MIL (Check engine warning light) signal Power switch on (IG), MIL (Check engine warning light) off 11 to 14 V
      Power switch on (IG), MIL (Check engine warning light) comes on Below 1 V
      L27-26 (B) - Body ground Y - Body ground Turn LH indicator light signal Power switch on (IG), turn LH indicator light off 11 to 14 V
      Power switch on (IG), turn LH indicator light blinks Below 1 V ←→ 11 to 14 V
      L27-27 (B) - Body ground G - Body ground Turn RH indicator light signal Power switch on (IG), turn RH indicator light off 11 to 14 V
      Power switch on (IG), turn RH indicator light blinks Below 1 V ←→ 11 to 14 V
      L27-28 (DISP) - Body ground
      *2      		 G - Body ground Steering pad switch signal (DISP) Power switch on (IG), DISP switch not pressed 11 to 14 V
      Power switch on (IG), DISP switch pressed Below 1 V
      L27-29 (STRG) - Body ground
      *1      		 G - Body ground Steering pad switch signal Always Pulse generation
      L27-30 (ES) - Body ground BR - Body ground Ground (Signal ground) Always Below 1 Ω
      L27-31 (TRIP) - Body ground
      *2      		 B - Body ground Steering pad switch signal (TRIP) Power switch on (IG), TRIP switch not pressed 11 to 14 V
      Power switch on (IG), TRIP switch pressed Below 1 V
      L27-35 (TC) - Body ground G - Body ground Light control rheostat signal (Tail cancel switch) Power switch on (IG), light control rheostat position except below 1 to 6 V
      Power switch on (IG), turn the light control rheostat fully upwards Below 1 V
      L27-36 (SW1) - Body ground B - Body ground Light control rheostat signal Always 4 to 6 V
      L27-37 (SW2) - Body ground B - Body ground Light control rheostat signal Power switch on (IG), light control rheostat except on tail cancel position 1 to 6 V
      (Gradually change)
      L27-38 (SW3) - Body ground R - Body ground Light control rheostat signal (Rheostat ground) Always Below 1 Ω
      L27-39 (RL) - Body ground L - Body ground Light control rheostat LED illumination signal Power switch on (IG), light control rheostat LED illumination off Below 1 V
      Power switch on (IG), light control rheostat LED illumination illuminates 4 to 6 V
      L27-40 (RV) - Body ground W - Body ground Light control rheostat illumination signal Power switch on (IG), light control rheostat illumination off Below 1 V
      Power switch on (IG), light control rheostat illumination illuminates 4 to 6 V
      L143-1 (12V) - Body ground B - Body ground Power switch signal Power switch off 11 to 14 V
      L143-4 (GND) - Body ground W - Body ground Ground Always Below 1 Ω
      L143-5 (BKR) - Body ground P - Body ground Headup display illumination signal Power switch on (IG) Pulse generation
      L143-6 (LAT) - Body ground R - Body ground Headup display dot illumination timing signal Power switch on (IG) Pulse generation
      L143-7 (CLKH) - Body ground R - Body ground Clock signal Always Pulse generation
      L143-8 (CLKL) - Body ground G - Body ground Clock signal Always Pulse generation
      L143-9 (SIH) - Body ground G - Body ground Headup display dot signal Power switch on (IG) Pulse generation
      L143-10 (SIL) - Body ground R - Body ground Headup display dot signal Power switch on (IG) Pulse generation
      L143-11 (WE) - Body ground L - Body ground Headup display dot illumination signal Power switch on (IG), headup display illuminated Pulse generation
      L143-14 (STP1) - Body ground V - Body ground Stepper motor signal Power switch on (IG) Pulse generation
      L143-15 (STP2) - Body ground LG - Body ground Stepper motor signal Power switch on (IG) Pulse generation
      L143-16 (STP3) - Body ground B - Body ground Stepper motor signal Power switch on (IG) Pulse generation
      L143-17 (STP4) - Body ground W - Body ground Stepper motor signal Power switch on (IG) Pulse generation
      L144-1 (NVSW) - L144-2 (E) Y - BE Navigation system display select switch signal Turn the power switch on (IG), HUD navi switch not pressed Below 1 V
      Turn the power switch on (IG), HUD navi switch pressed 11 to 14 V
      L144-2 (E) - Body ground
      *3      		 BE - Body ground Ground Always Below 1 Ω
      L144-3 (HUDI) - Body ground W - Body ground Headup display indicator light signal Turn the power switch on (IG), HUD main switch indicator light goes off Below 1 V
      Turn the power switch on (IG), HUD main switch indicator light comes on 11 to 14 V
      L144-4 (HUDD) - L144-2 (E) R - BE Headup display position down switch signal Turn the power switch on (IG), HUD tilt down switch not pressed Below 1 V
      Turn the power switch on (IG), HUD tilt down switch pressed 11 to 14 V
      L144-7 (HUDU) - L144-2 (E) P - BE Headup display position up switch signal Turn the power switch on (IG), HUD tilt up switch not pressed Below 1 V
      Turn the power switch on (IG), HUD tilt up switch pressed 11 to 14 V
      L144-8 (HUDO) - L144-2 (E) B - BE Headup display mode select switch signal Turn the power switch on (IG), headup display main switch not pressed Below 1 V
      Turn the power switch on (IG), headup display main switch pressed 11 to 14 V
      L144-9 (IIND) - Body ground BE - Body ground Navigation system indicator light signal Turn the power switch on (IG), HUD navi switch indicator light goes off Below 1 V
      Turn the power switch on (IG), HUD navi switch indicator light comes on 11 to 14 V
      • *1: w/ Touch tracer display
      • *2: w/o Touch tracer display
      • *3: w/ Headup display
      • *4: w/ Automatic Headlight Beam Level Control System
    2. Waveform 1 (Reference):
      Fig 2: Waveform 1 (Reference)
      GTY156264Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Item Condition
      Tool setting 5 V/DIV., 20 ms./DIV.
      Vehicle condition Driving at approx. 20 km/h (12 mph)

      HINT: 

      When the system is functioning normally, one wheel revolution generates 4 pulses. As the vehicle speed increases, the width indicated by (A) in the illustration narrows.

  2. COMBINATION METER ASSEMBLY INNER CIRCUIT 
    Fig 3: Identifying Combination Meter Assembly Inner Circuit Diagram (1 Of 3)
    GTY336944Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 4: Identifying Combination Meter Assembly Inner Circuit Diagram (2 Of 3)
    GTY325272Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 5: Identifying Combination Meter Assembly Inner Circuit Diagram (3 Of 3)
    GTY425475Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Terminal No. (Symbol) Wire Harness Side
    L27 1 (TIMR) Plugin Charge Control ECU Assembly
    2 (TC O) Pattern Select Switch Assembly
    3 (TIRE) Tire Pressure Warning ECU
    4 (LST1) ECM
    5 (S) Oil Pressure Switch
    6 (LVWG) Headlight Leveling ECU Assembly
    7 (+S) Each part that uses the speed signal
    8 (SI) Skid Control ECU
    9 (E2) Ground (Coolant Temperature Sensor Ground)
    10 (CANH) CAN Communication Line
    11 (CANL) CAN Communication Line
    12 (HOUR) Satellite Switch Set
    13 (MIN) Satellite Switch Set
    14 (L) Fuel Sender Gauge Assembly
    15 (ES 2) Fuel Sender Gauge Assembly
    16 (TWS3) Coolant Temperature Sensor
    17 (RST) Satellite Switch Set
    18 (B) ECU-B Fuse
    19 (IG+) GAUGE Fuse
    20 (IG2) MET Fuse
    21 (PBLT) Telltale Light Assembly
    22 (LP) Certification ECU (Smart Key ECU Assembly)
    23 -
    24 -
    25 (EFI) ECM
    26 (B) Turn Signal Flasher Assembly
    27 (B) Turn Signal Flasher Assembly
    28 (DISP) Steering Pad Switch Assembly
    29 (STRG) Steering Pad Switch Assembly
    30 (ES) Ground
    31 (TRIP) Steering Pad Switch Assembly
    32 -
    33 -
    34 -
    35 (TC) Light Control Rheostat
    36 (SW1) Light Control Rheostat
    37 (SW2) Light Control Rheostat
    38 (SW3) Light Control Rheostat
    39 (RL) TAIL Relay
    40 (RV) TAIL Relay
    L143 1 (12V) Headup Display (Combination Meter Mirror ECU)
    2 -
    3 -
    4 (GND) Headup Display (Combination Meter Mirror ECU)
    5 (BKR) Headup Display (Combination Meter Mirror ECU)
    6 (LAT) Headup Display (Combination Meter Mirror ECU)
    7 (CLKH) Headup Display (Combination Meter Mirror ECU)
    8 (CLKL) Headup Display (Combination Meter Mirror ECU)
    9 (SIH) Headup Display (Combination Meter Mirror ECU)
    10 (SIL) Headup Display (Combination Meter Mirror ECU)
    11 (WE) Headup Display (Combination Meter Mirror ECU)
    12 -
    13 -
    14 (STP1) Headup Display (Combination Meter Mirror ECU)
    15 (STP2) Headup Display (Combination Meter Mirror ECU)
    16 (STP3) Headup Display (Combination Meter Mirror ECU)
    17 (STP4) Headup Display (Combination Meter Mirror ECU)
    18 -
    19 -
    20 -
    21 -
    22 -
    23 -
    24 -
    L144 1 (NVSW) Satellite Switch Set
    2 (E) Satellite Switch Set
    3 (HUDI) Satellite Switch Set
    4 (HUDD) Satellite Switch Set
    5 -
    6 -
    7 (HUDU) Satellite Switch Set
    8 (HUDO) Satellite Switch Set
    9 (IIND) Satellite Switch Set
    10 -
    11 -
    12 -
    13 -
    14 -
    15 -
    16 -
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