LEMON Manuals: Even more car manuals for everyone
Home >> Toyota >> 2014 >> Prius Five >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Meter / Gauge / Display (Diagnostics - Introduction) (Except Plug-In) >> Meter / Gauge System >> Terminals Of Ecu [10/2013 - ] >> Terminals Of Ecu [10/2013 - ]

Terminals Of Ecu [10/2013 - ]

  1. COMBINATION METER ASSEMBLY 
    Fig 1: Combination Meter Assembly Connector Terminal Identification
    GTY329252Courtesy 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
      L27-2 (TC O) - Body ground G - Body ground Trip switch signal (Unit change switch) Unit change switch not pressed 11 to 14 V
      Unit change switch pressed Below 1 V
      L27-3 (TIRE)*1 - 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 blinks Below 3.2 V
      L27-5 (S) - Body ground R - Body ground Oil pressure switch signal Power switch on (IG), oil pressure warning display off Below 1 V
      Power switch on (IG), oil pressure warning display comes on 11 to 14 V
      L27-6 (LVWG) - Body ground 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 blinks Below 1 V ←→ 11 to 14 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 1Fig 2)
      L27-8 (SI) - Body ground V - Body ground Speed signal (Input) Power switch on (IG), front wheel turns slowly Pulse generation
      (See waveform 1Fig 2)
      L27-9 (E2) - Body ground G - Body ground Ground (Water temperature sensor ground) Always Below 1 Ω
      L27-10 (CANH) - Body ground P - Body ground CAN communication signal Power switch off 200 Ω or higher
      L27-11 (CANL) - Body ground W - Body ground CAN communication signal Power switch off 200 Ω or higher
      L27-12 (HOUR) - Body ground B - Body ground Trip switch 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 Trip switch 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 (ES2) - Body ground W - Body ground Ground Always Below 1 Ω
      L27-16 (TWS3) - Body ground B - Body ground Water temperature sensor signal Power switch on (IG), coolant temperature below 113°C (235°F) 0.2 to 4.8 V
      Power switch on (IG), coolant temperature below 120°C (248°F) or more Below 0.15 V
      L27-17 (RST) - Body ground R - Body ground Trip switch 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 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 Pulse generation
      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 (AU1)*4 - Body ground G - Body ground Steering pad switch assembly 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)*5 - Body ground G - Body ground Multi-information switch (steering pad switch assembly) signal Always Pulse generation
      L27-30 (ES) - Body ground BR - Body ground Ground (Signal ground) Always Below 1 Ω
      L27-31 (AU2)*4 - Body ground B - Body ground Steering pad switch assembly power supply Power switch off Below 1 V
      Power switch on (IG) 11 to 14 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)*2 - 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)*2 - 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
      L136-1 (12V)*3 - Body ground B - Body ground Power switch signal Power switch off 11 to 14 V
      L136-4 (GND)*3 - Body ground W - Body ground Ground Always Below 1 Ω
      L136-5 (BKR)*3 - Body ground P - Body ground Headup display illumination signal Power switch on (IG) Pulse generation
      L136-6 (LAT)*3 - Body ground R - Body ground Headup display dot illumination timing signal Power switch on (IG) Pulse generation
      L136-7 (CLKH)*3 - Body ground R - Body ground Clock signal Always Pulse generation
      L136-8 (CLKL)*3 - Body ground G - Body ground Clock signal Always Pulse generation
      L136-9 (SIH)*3 - Body ground G - Body ground Headup display dot signal Power switch on (IG) Pulse generation
      L136-10 (SIL)*3 - Body ground R - Body ground Headup display dot signal Power switch on (IG) Pulse generation
      L136-11 (WE)*3 - Body ground L - Body ground Headup display dot illumination signal Power switch on (IG), headup display illuminated Pulse generation
      L136-14 (STP1)*3 - Body ground V - Body ground Stepper motor signal Power switch on (IG) Pulse generation
      L136-15 (STP2)*3 - Body ground LG - Body ground Stepper motor signal Power switch on (IG) Pulse generation
      L136-16 (STP3)*3 - Body ground B - Body ground Stepper motor signal Power switch on (IG) Pulse generation
      L136-17 (STP4)*3 - Body ground W - Body ground Stepper motor signal Power switch on (IG) Pulse generation
      L137-1 (NVSW)*3 - L137-2 (E) Y - BE Navigation system display select switch signal Turn the power switch on (IG), navigation system display select switch not pressed Below 1 V
      Turn the power switch on (IG), navigation system display select switch pressed 11 to 14 V
      L137-2 (E) - Body ground BE - Body ground Ground Always Below 1 Ω
      L137-3 (HUDI)*3 - Body ground W - Body ground Headup display indicator light signal Turn the power switch on (IG), headup display indicator light goes off Below 1 V
      Turn the power switch on (IG), headup display indicator light comes on 11 to 14 V
      L137-4 (HUDD)*3 - L137-2 (E) R - BE Headup display position down switch signal Turn the power switch on (IG), headup display position down switch not pressed Below 1 V
      Turn the power switch on (IG), headup display position down switch pressed 11 to 14 V
      L137-7 (HUDU)*3 - L137-2 (E) P - BE Headup display position up switch signal Turn the power switch on (IG), headup display position down switch not pressed Below 1 V
      Turn the power switch on (IG), headup display position down switch pressed 11 to 14 V
      L137-8 (HUDO)*3 - L137-2 (E) B - BE Headup display mode select switch signal Turn the power switch on (IG), headup display mode select switch not pressed Below 1 V
      Turn the power switch on (IG), headup display mode select switch pressed 11 to 14 V
      L137-9 (IIND)*3 - Body ground BE - Body ground Navigation system indicator light signal Turn the power switch on (IG), navigation system indicator light goes off Below 1 V
      Turn the power switch on (IG), navigation system indicator light comes on 11 to 14 V
      • *1: w/ Tire Pressure Warning System
      • *2: except Korea, Mexico
      • *3: w/ Headup Display
      • *4: w/o Touch Tracer Display
      • *5: w/ Touch Tracer Display
    2. Waveform 1 (Reference): Using an oscilloscope:
      Fig 2: Identifying Waveform Graph 1
      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: Combination Meter Assembly Inner Circuit Wiring Diagram (1 Of 3)
    GTY382813Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 4: Combination Meter Assembly Inner Circuit Wiring Diagram (2 Of 3)
    GTY380491Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 5: Combination Meter Assembly Inner Circuit Wiring Diagram (3 Of 3)
    GTY382080Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Terminal No. (Symbol) Wire Harness Side
    L27 1 -
    2 (TC O) Trip Switch
    3 (TIRE) Tire Pressure Warning ECU*1
    4 -
    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 (Water Temperature Sensor Ground)
    10 (CANH) CAN Communication Line
    11 (CANL) CAN Communication Line
    12 (HOUR) Trip Switch
    13 (MIN) Trip Switch
    14 (L) Fuel Sender Gauge Assembly
    15 (ES2) Fuel Sender Gauge Assembly
    16 (TWS3) Water Temperature Sensor
    17 (RST) Trip Switch
    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
    27 (B) Turn Signal Flasher
    28 (AU1) Multi-information Switch (Steering Pad Switch Assembly)*4
    29 (STRG) Multi-information Switch (Steering Pad Switch Assembly)*5
    30 (ES) Ground
    31 (AU2) Multi-information Switch (Steering Pad Switch Assembly)*4
    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) Each part that uses the illumination signal*2
    40 (RV) PANEL Fuse*2
    Terminal No. (Symbol) Wire Harness Side
    L136*3 1 (12V) Headup Display
    2 -
    3 -
    4 (GND) Ground
    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 -
    L137*3 1 (NVSW) Trip Switch
    2 (E) Trip Switch
    3 (HUDI) Trip Switch
    4 (HUDD) Trip Switch
    5 -
    6 -
    7 (HUDU) Trip Switch
    8 (HUDO) Trip Switch
    9 (IIND) Trip Switch
    10 -
    11 -
    12 -
    13 -
    14 -
    15 -
    16 -
    • *1: w/ Tire Pressure Warning System
    • *2: except Korea, Mexico
    • *3: w/ Headup Display
    • *4 w/o Touch Tracer Display
    • *5 w/ Touch Tracer Display
scientia non olet · About LEMON Manuals