Terminals Of Ecu [08/2019 - ]
- COMBINATION METER ASSEMBLY
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- Disconnect the G3 and G101 combination meter assembly connectors.
- Measure the voltage and resistance according to the value(s) in the table below.
Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition G3-21 (B) - Body ground V - Body ground Battery Always 11 to 14 V G3-22 (IG+) - Body ground R - Body ground Engine switch signal Engine switch off Below 1 V Engine switch on (IG) 11 to 14 V G101-1 (B) - Body ground R - Body ground Battery Always 11 to 14 V G3-20 (MGND) - Body ground BR - Body ground Ground Always Below 1 Ω G101-2 (E1) - Body ground W-B - Body ground Ground Always Below 1 Ω - Reconnect the G3 and G101 combination meter assembly connectors.
- Measure the voltage and waveform according to the value(s) in the table below.
Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition G3-2 (E3) - Body ground W - Body ground Fuel sender gauge ground Always Below 1 V G3-7 (HZSW) - Body ground W - Body ground Hazard warning switch signal Hazard warning switch on Below 1 V Hazard warning switch off 11 to 14 V G3-8 (RHUP) - Body ground B - Body ground Trip switch signal Engine switch on (IG), up switch of trip switch pushed Below 1 V Engine switch on (IG), up switch of trip switch not pushed 11 to 14 V G3-12 (CHG-) - Body ground P - Body ground Charge warning light signal Engine switch on (IG), charge warning light on Below 1 V Engine switch on (IG), charge warning light off 11 to 14 V G3-13 (RHDW) - Body ground P - Body ground Trip switch signal Engine switch on (IG), down switch of trip switch pushed Below 1 V Engine switch on (IG), down switch of trip switch not pushed 11 to 14 V G3-14 (RSET) - Body ground P - Body ground ODO/TRIP switch signal Engine switch on (IG), ODO/TRIP switch pushed Below 1 V Engine switch on (IG), ODO/TRIP switch not pushed 11 to 14 V G3-17 (+S) - Body ground R - Body ground Speed signal for other system (Output) Driving at approximately 20 km/h (12 mph) Pulse generation
(See waveform)G3-18 (SI) - Body ground V - Body ground Speed signal for other system (Input) Driving at approximately 20 km/h (12 mph) Pulse generation
(See waveform)G3-26 (L) - G3-2 (E3) B - W Fuel sender gauge signal Engine switch on (IG), fuel level full Below 1 V Engine switch on (IG), fuel level low 4.5 to 5.5 V G3-29 (OIL) - Body ground G - Body ground Engine oil level sensor signal Engine switch on (IG), engine oil level warning light comes on Below 1 V Engine switch on (IG), engine oil level warning light comes off 11 to 14 V G3-30 (WLVL) - Body ground W - Body ground Washer level warning signal Engine switch on (IG), level warning switch on Below 1 V Engine switch on (IG), level warning switch off 11 to 14 V G3-31 (MSM+) - Body ground R - Body ground Steering pad switch signal Engine switch on (IG), enter, top and back switches on steering pad switch not pushed 4.3 to 5.2 V Engine switch on (IG), enter switch on steering pad switch pushed Below 0.6 V Engine switch on (IG), top switch on steering pad switch pushed 1.0 to 2.2 V Engine switch on (IG), back switch on steering pad switch pushed 2.3 to 3.4 V G3-32 (MSTI) - Body ground LG - Body ground Steering pad switch signal Engine switch on (IG), up, down, right and left switches on steering pad switch assembly not pushed 4.3 to 5.2 V Engine switch on (IG), left switch on steering pad switch pushed Below 0.6 V Engine switch on (IG), up switch on steering pad switch pushed 1.0 to 2.2 V Engine switch on (IG), down switch on steering pad switch pushed 2.3 to 3.4 V Engine switch on (IG), right switch on steering pad switch pushed 3.4 to 4.5 V G3-36 (INT) - Body ground SB - Body ground Tire pressure warning reset switch Engine switch on (IG), tire pressure warning reset switch on Below 1 V Engine switch on (IG), tire pressure warning reset switch off 8 to 15 V G3-39 (CANL) - Body ground W - Body ground CAN communication line - - G3-40 (CANH) - Body ground V - Body ground CAN communication line - - G101-4 (ER) - Body ground P - Body ground RH turn indicator light signal (Input) Engine switch on (IG), RH turn signal switch on Below 1 V Engine switch on (IG), RH turn signal switch off 11 to 14 V G101-5 (EL) - Body ground G - Body ground LH turn indicator light signal (Input) Engine switch on (IG), LH turn signal switch on Below 1 V Engine switch on (IG), LH turn signal switch off 11 to 14 V G101-6 (S) - Body ground V - Body ground Engine oil pressure switch signal Engine switch on (IG), engine oil pressure warning light on Below 1 V Engine switch on (IG), engine oil pressure warning light off 11 to 14 V G101-8 (LL) - Body ground P - Body ground LH turn indicator light signal (Output) Engine switch on (IG), LH turn indicator light off Below 1 V Engine switch on (IG), LH turn indicator light blinking 11 to 14 V ←→ Below 1 V G101-9 (ILL-) - Body ground GR - Body ground Illumination signal Engine switch on (IG), headlight dimmer switch off Below 1 V Engine switch on (IG), headlight dimmer switch in tail or head position Pulse generation G101-13 (LR) - Body ground G - Body ground RH turn indicator light signal (Output) Engine switch on (IG), RH turn indicator light off Below 1 V Engine switch on (IG), RH turn indicator light blinking 11 to 14 V ←→ Below 1 V - Using an oscilloscope, check waveform.WAVEFORM (REFERENCE)
Item Condition Tester Connection - G3-17 (+S) - Body ground
- G3-18 (SI) - Body ground
Tool setting 5 V/DIV., 20 ms./DIV. Vehicle condition Driving at approximately 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.
- Using an oscilloscope, check waveform.