Vehicle Interior. Corolla. Zre142 Aze141
Meter Gauge Display. Corolla. Zre142 Aze141
Meter / Gauge System -- Terminals Of Ecu |
| COMBINATION METER |
Measure the voltage according to the value(s) in the table below.
Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition E46-1 (WRNP) - Body ground BE*1 or W*2 - Body ground Front passenger side seat belt warning light signal Front passenger seat occupied, ignition switch ON, front passenger side seat belt warning light OFF 11 to 14 V Front passenger seat occupied, ignition switch ON, front passenger side seat belt warning light is blinking Below 1 V ←→ 11 to 14 V E46-2 (WLVL)*3 - Body ground BE - Body ground Washer level warning light signal Ignition switch ON, washer level warning light OFF 11 to 14 V Ignition switch ON, washer level warning light ON Below 1 V E46-3 (-) - Body ground L*2 or *5, W-B*6 - Body ground Headlight Hi-beam indicator light signal Always Below 1 V E46-4 (+) - Body ground R - Body ground Headlight Hi-beam indicator light signal Hi-beam switch OFF 11 to 14 V Hi-beam switch ON Below 1 V E46-5 (B) - Body ground L - Body ground Turn indicator light signal Ignition switch ON, turn signal RH indicator light OFF Below 1 V Ignition switch ON, turn signal RH indicator light ON 11 to 14 V E46-6 (B) - Body ground Y - Body ground Turn indicator light signal Ignition switch ON, turn signal LH indicator light OFF Below 1 V Ignition switch ON, turn signal LH indicator light ON 11 to 14 V E46-7 (TIRE) - Body ground P - Body ground Tire pressure warning light signal Ignition switch ON, tire pressure warning light OFF 3.2 V or more Ignition switch ON, tire pressure warning light ON 0.9 to 3.2 V E46-9 (TX1+) - Body ground G*1 or LG*2 - Body ground Outside temperature signal Ignition switch ON 5 V or less E46-10 (E) - Body ground BR - Body ground Ground (Fuel ground) Always Below 1 V E46-11 (EP) - Body ground W-B - Body ground Ground (Illumination ground) Always Below 1 V E46-13 (TX-)*7 - Body ground W - Body ground CAN communication signal Ignition switch ON Pulse generation E46-14 (TX1-)*7 - Body ground G - Body ground CAN communication signal Ignition switch ON Pulse generation E46-16 (FOG)*4 - Body ground P - Body ground Front fog indicator light signal Front fog light switch off, front fog indicator light OFF Below 1 V Front fog light switch on, front fog indicator light ON 11 to 14 V E46-20 (EFI) - Body ground P*1 or R*2 - Body ground MIL (Check engine warning light) signal Ignition switch ON, MIL OFF 11 to 14 V Ignition switch ON, MIL ON Below 3 V E46-23 (TEMP) - Body ground W*1 or GR*2 - Body ground Outside temperature signal Ignition switch ON, outside temperature 25°C (77°F) Approximately 1.3 V E46-24 (ILL+) - Body ground V*1 or G*2 - Body ground Tail indicator light signal Headlight dimmer switch off, tail indicator light OFF Below 1 V Headlight dimmer switch is at the TAIL position, tail indicator light ON 11 to 14 V E46-25 (L) - Body ground Y*1 or P*2 - Body ground Fuel signal Ignition switch ON, fuel level is EMPTY 3 to 7 V Ignition switch ON, fuel level is FULL Below 1 V E46-26 (ILL-) - Body ground V*5 or W*2 - Body ground Illumination signal Ignition switch ON, headlight dimmer switch OFF Below 1 V Ignition switch ON, headlight dimmer switch is at the TAIL or HEAD position Below 1 V ←→ 11 to 14 V E46-27 (CANH) - E46-28 (CANL) G - W CAN communication signal Ignition switch ON Pulse generation E46-28 (CANL) - E46-27 (CANH) W - G CAN communication signal Ignition switch ON Pulse generation E46-29 (ILL-) - Body ground BE*5 or W*2 - Body ground Illumination signal Ignition switch ON, headlight dimmer switch OFF Below 1 V Ignition switch ON, headlight dimmer switch TAIL or HEAD position Below 1 V ←→ 11 to 14 V E46-30 (ET) - Body ground BR*1 or W-B*2 - Body ground Ground (Signal ground) Always Below 1 V E46-32 (B) - Body ground W*1 or R*2 - Body ground Battery Always 11 to 14 V E46-33 (IG+) - Body ground P*1 or B*2 - Body ground Ignition switch signal Ignition switch off Below 1 V Ignition switch ON 11 to 14 V E46-35 (SI) - Body ground V*1 or LG*2 - Body ground Speed signal for other systems (Input) Ignition switch ON, wheel turned slowly Pulse generation
(See waveform)E46-36 (+S) - Body ground V - Body ground Speed signal for other systems (Output) Wheel turned slowly Pulse generation
(See waveform)E46-38 (S) - Body ground Y*1 or G*2 - Body ground Engine oil pressure warning light signal Ignition switch ON, engine oil pressure warning light OFF 11 to 14 V Ignition switch ON, engine oil pressure warning light ON Below 1 V E46-39 (CHG-) - Body ground Y - Body ground Charge warning light signal Ignition switch ON, charge warning light OFF 11 to 14 V Ignition switch ON, charge warning light ON Below 1 V E46-40 (SW) - Body ground Y*1 or BE*2 - Body ground Brake fluid level warning light signal Ignition switch ON, brake warning light OFF 11 to 14 V Ignition switch ON, brake warning light ON Below 1 V - *1: for TMC Made
- *2: except TMC Made
- *3: w/ Washer Level Warning Light
- *4: w/ Front Fog Light
- *5: for TMC Made with Daytime Running Light
- *6: for TMC Made without Daytime Running Light
- *7: w/ Smart Key System
- *1: for TMC Made
Waveform (Reference): Using oscilloscope:
Item Condition Tool setting 5 V/DIV., 20 ms./DIV. Vehicle condition Driving at approximately 12 mph (20 km/h) - HINT:
- Vehicle speed signal that has been received and transmitted via the direct line is used for another system, and is not used for combination meter operation.
- 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.
- 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.
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| COMBINATION METER INNER CIRCUIT |
Combination Meter Inner Circuit
Terminal No. Wire Harness Side (Symbol) E46 1 Telltale Light Assembly (WRNP) 2 Washer Level Warning Switch (WLVL)*1 3 DRL Relay (-) 4 H-LP RH HI Fuse (+) 5 Turn Signal Flasher (B) 6 Turn Signal Flasher (B) 7 Tire Pressure Warning ECU (TIRE) 8 - 9 Outside Temperature Sensor (TX1+) 10 Fuel Sender Gauge Assembly (E) 11 Ground (EP) 12 - 13 CAN Communication Line (TX-)*3 14 CAN Communication Line (TX1-)*3 15 - 16 FR FOG Relay (FOG)*2 17 - 18 - 19 - 20 ECM (EFI) 21 - 22 - 23 Outside Temperature Sensor (TEMP) 24 TAIL Fuse (ILL+) 25 Fuel Sender Gauge Assembly (L) 26 Each part that uses the illumination signal (ILL-) 27 CAN Communication Line (CANH) 28 CAN Communication Line (CANL) 29 Each part that uses the illumination signal (ILL-) 30 Ground (ET) 31 - 32 ECU-B Fuse (B) 33 METER Fuse (IG+) 34 - 35 Skid Control ECU (SI) 36 Each part that uses the speed signal (+S) 37 - 38 Oil Pressure Switch (S) 39 Generator (CHG-) 40 Brake Fluid Level Warning Switch (SW) - *1: w/ Washer Level Warning Light
- *2: w/ Front Fog Light
- *3: w/ Smart Key System
- *1: w/ Washer Level Warning Light
| TELLTALE LIGHT ASSEMBLY (except TMC Made, for TMC Made (for Manual Air Conditioning System)) |
Measure the voltage and resistance according to the value(s) in the table below.
Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition E124-2 (E) - Body ground W-B - Body ground Ground Always Below 1 Ω E124-4 (B) - Body ground V - Body ground Battery Ignition switch OFF 11 to 14 V E124-5 (ILL+) - Body ground G - Body ground Illumination signal Ignition switch ON and light control switch off Below 1 V Ignition switch ON and light control switch tail or head position 4 to 6 V
| TELLTALE LIGHT ASSEMBLY (for TMC Made (for Automatic Air Conditioning System)) |
Measure the voltage and resistance according to the value(s) in the table below.
Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition E48-1 (B) - Body ground W - Body ground Battery Ignition switch OFF 11 to 14 V E48-2 (ACC) - Body ground GR - Body ground Ignition switch (ACC) signal Ignition switch OFF Below 1 V Ignition switch ON (ACC) 11 to 14 V E48-4 (ILL+) - Body ground G - Body ground Illumination signal Ignition switch ON and light control switch off Below 1 V Ignition switch ON and light control switch tail or head position 4 to 6 V E48-12 (E) - Body ground W-B - Body ground Ground Always Below 1 Ω
| CLOCK ASSEMBLY (w/ Daytime Running Light) |
Measure the voltage and resistance according to the value(s) in the table below.
Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition E125-1 (E) - Body ground W-B - Body ground Ground Always Below 1 Ω E125-5 (ILL+) - Body ground G - Body ground Illumination signal Light control switch off Below 1 V Light control switch TAIL or HEAD 11 to 14 V E125-6 (ACC) - Body ground GR - Body ground Ignition switch signal Ignition switch off Below 1 V Ignition switch ON (ACC) 11 to 14 V E125-7 (B) - Body ground W*1 or R*2 - Body ground Battery Always 11 to 14 V - *1: for TMC Made
- *2: except TMC Made
- *1: for TMC Made