Terminals Of Ecu [08/2015 - ]
- COMBINATION METER SUB-ASSEMBLY
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- 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 (B) - Body ground L - Body ground Auxiliary battery Power switch off 11 to 14 V L27-2 (IG+) - Body ground BR - Body ground Power switch signal Power switch off Below 1 V Power switch on (IG) 11 to 14 V L27-4 (HAZ) - Body ground GR - Body ground Hazard switch (Hazard warning signal switch assembly) Power switch on (IG), hazard warning lights off 11 to 14 V Power switch on (IG), hazard warning lights on Below 1 V L27-5 (LP) - Body ground B - Body ground Security warning signal Security warning off 11 to 14 V Security warning blinking Below 1 V ←→ 11 to 14 V L27-6 (EFI) - Body ground LG - Body ground MIL (Check engine warning light) signal Power switch on (IG), MIL off (Check engine warning light) 11 to 14 V Power switch on (IG), MIL on (Check engine warning light) Below 1 V L27-7 (S) - Body ground V - Body ground Oil pressure signal Engine started 11 to 14 V Engine not started Below 1 V L27-8 (TWS3) - L27-9 (E2) B - GR Engine coolant temperature sensor signal Power switch on (IG), engine coolant temperature warning light off 4.9 to 5.1 V Power switch on (IG), engine coolant temperature warning light on Below 1 V L27-9 (E2) - Body ground GR - Body ground Ground Always Below 1 Ω L27-10 (MSM+) - Body ground*1 B - Body ground Steering pad switch RH signal Power switch on (IG), enter and back switches on steering pad switch RH not pushed 4.8 to 5.2 V Power switch on (IG), enter or back switch on steering pad switch RH pushed Below 1 V L27-11 (ES) - Body ground BR - Body ground Ground Always Below 1 Ω L27-12 (L) - L27-13 (ES 2) B - R Fuel signal Power switch on (IG), fuel level full Below 1 V Power switch on (IG), fuel level low 4.5 to 9 V L27-13 (ES 2) - Body ground R - Body ground Ground Always Below 1 Ω L27-14 (TIRE) - Body ground Y - 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 L27-15 (+S) - Body ground V - Body ground Speed signal for other system (Output) Power switch on (IG), wheel being rotates Pulse generation
(See waveform 1)L27-16 (SI) - Body ground BR - Body ground Speed signal for other system (Input) Power switch on (IG), wheel being rotates Pulse generation
(See waveform 1)L27-17 (B) - Body ground P - Body ground RH turn indicator light signal Power switch on (IG), RH turn signal indicator light off Below 1 V Power switch on (IG), RH turn signal indicator light blinking Below 1 V ←→ 11 to 14 V L27-18 (B) - Body ground R - Body ground LH turn indicator light signal Power switch on (IG), LH turn signal indicator light off Below 1 V Power switch on (IG), LH turn signal indicator light blinking Below 1 V ←→ 11 to 14 V L27-19 (CANH) - Body ground SB - Body ground CAN communication line - - L27-20 (CANL) - Body ground G - Body ground CAN communication line - - L27-21 (HOUR) - Body ground B - Body ground Hour adjust switch (Hazard warning signal switch assembly) signal Power switch on (IG), hour adjust switch not pressed 11 to 14 V Power switch on (IG), hour adjust switch pressed Below 1 V L27-22 (MIN) - Body ground P - Body ground Minute adjust switch (Hazard warning signal switch assembly) signal Power switch on (IG), minute adjust switch not pressed 11 to 14 V Power switch on (IG), minute adjust switch pressed Below 1 V L27-23 (RST) - Body ground R - Body ground Second adjust switch (Hazard warning signal switch assembly) signal Power switch on (IG), second adjust switch not pressed 11 to 14 V Power switch on (IG), second adjust switch pressed Below 1 V L27-24 (ODO) - Body ground GR - Body ground ODO switch (Steering pad switch RH) signal Power switch on (IG), ODO switch not pressed 11 to 14 V Power switch on (IG), ODO switch pressed Below 1 V L27-25 (MSSL) - Body ground*2 L - Body ground DISP switch (Steering pad switch RH) signal Power switch on (IG), DISP switch not pressed 11 to 14 V Power switch on (IG), DISP switch pressed Below 1 V L27-25 (MSTI) - Body ground*1 W - Body ground Steering pad switch RH signal Power switch on (IG), up, down, right and left switches on steering pad switch RH not pushed 4.8 to 5.2 V Power switch on (IG), up, down, right or left switch on steering pad switch RH pushed Below 1 V L27-26 (TC O) - Body ground SB - Body ground km/h / MPH switch (Hazard warning signal switch assembly) signal Power switch on (IG), km/h / MPH switch not pressed 4.9 to 5.1 V Power switch on (IG), km/h / MPH switch pressed Below 1 V L27-27 (LVWG) - Body ground*3 L - Body ground Headlight leveling 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 L27-28 (MSCH) - Body ground*4 B - Body ground Local bus communication line - - L27-29 (MSCL) - Body ground*4 W - Body ground Local bus communication line - - L27-30 (TC) - Body ground G - Body ground Light control rheostat signal Always 4 to 6 V L27-30 (TC) - L27-31 (SW1) G - P Tail cancel signal Power switch on (IG), light control rheostat turned to full bright (MAX.) 8 kΩ or higher Power switch on (IG), light control rheostat not turned to full bright Below 8 kΩ L27-32 (SW2) - Body ground SB - Body ground Light control rheostat signal Power switch on (IG), light control rheostat turned to full bright (MAX.) 8 kΩ or higher Power switch on (IG), light control rheostat position between MIN. and MAX. 50 Ω to 8 kΩ Power switch on (IG), light control rheostat turned to full dim (MIN.) Below 50 Ω L27-33 (SW3) - Body ground R - Body ground Ground Always Below 1 Ω L27-34 (RL) - Body ground GR - Body ground Illumination signal Power switch on (IG), light control switch in tail or head position Pulse generation L27-35 (RV) - Body ground W - Body ground Illumination signal Power switch on (IG), light control switch in tail or head position Pulse generation L125-2 (B) - Body ground SB - Body ground Auxiliary battery Power switch off 11 to 14 V L125-3 (LL) - Body ground Y - Body ground LH turn indicator light signal Power switch on (IG), LH turn indicator light off Below 1 V Power switch on (IG), LH turn indicator light blinking Below 1 V ←→ 11 to 14 V L125-5 (LR) - Body ground SB - Body ground RH turn indicator light signal Power switch on (IG), RH turn indicator light off Below 1 V Power switch on (IG), RH turn indicator light blinking Below 1 V ←→ 11 to 14 V - *1: w/ Multi-information display
- *2: w/o Multi-information display
- *3: w/ Automatic headlight beam level control
- *4: for Navigation receiver type
- Waveform 1 (Reference):
Item Condition Tool setting 5 V/DIV., 20 ms./DIV. Vehicle condition Power switch on (IG), wheel being rotates. 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.
- Measure the voltage and resistance according to the value(s) in the table below.