Terminals Of Ecu [12/2012 - 10/2015]

COMBINATION METER 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
G16-2 (ILL-) - Body ground	LG - Body ground	Outside dimmer signal	Ignition switch ON, light control rheostat position max	Below 1 V
G16-2 (ILL-) - Body ground	LG - Body ground	Outside dimmer signal	Ignition switch ON, light control rheostat position min	11 to 14 V
G16-4 (EP) - Body ground	BR - Body ground	Ground	Always	Below 1 Ω
G16-5 (SI) - Body ground	V - Body ground	Speed signal for other systems (Input)	Driving at approximately 20 km/h (12 mph)	Pulse generation (See waveform 1)
G16-6 (+S) - Body ground	LG - Body ground	Speed signal for other systems (Output)	Driving at approximately 20 km/h (12 mph)	Pulse generation (See waveform 1)
G16-9 (S) - Body ground	L - Body ground	Engine oil pressure switch signal	Ignition switch ON, engine oil pressure switch off	11 to 14 V
G16-9 (S) - Body ground	L - Body ground	Engine oil pressure switch signal	Ignition switch ON, engine oil pressure switch on	Below 1 V
G16-10 (WLVL) - Body ground	LG - Body ground	Level warning switch signal	Ignition switch ON, washer level indicator light off	11 to 14 V
G16-10 (WLVL) - Body ground	LG - Body ground	Level warning switch signal	Ignition switch ON, washer level indicator light on	Below 1 V
G16-11 (CHK) - Body ground	R - Body ground	MIL signal	Ignition switch ON, MIL off	11 to 14 V
G16-11 (CHK) - Body ground	R - Body ground	MIL signal	Ignition switch ON, MIL on	Below 1 V
G16-12 (SW) - Body ground	Y - Body ground	Brake fluid level warning switch signal	Ignition switch ON, brake fluid level warning switch off	11 to 14 V
G16-12 (SW) - Body ground	Y - Body ground	Brake fluid level warning switch signal	Ignition switch ON, brake fluid level warning switch on	Below 1 V
G16-13 (CHG-) - Body ground	L - Body ground	Charge warning light signal	Ignition switch ON, charge warning light off	11 to 14 V
G16-13 (CHG-) - Body ground	L - Body ground	Charge warning light signal	Ignition switch ON, charge warning light on	Below 1 V
G16-14 (-) - Body ground	Y - Body ground	High beam indicator light ground	Ignition switch ON, high beam indicator light off	10 kΩ or higher
G16-14 (-) - Body ground	Y - Body ground	High beam indicator light ground	Ignition switch ON, high beam indicator light on	Below 1 Ω
G16-15 (E) - Body ground	GR - Body ground	Fuel sender gauge ground	Always	Below 1 Ω
G16-16 (L) - Body ground	SB - Body ground	Fuel sender gauge signal	Fuel level F	Below 1 V
G16-16 (L) - Body ground	SB - Body ground	Fuel sender gauge signal	Fuel level E	4.5 to 9 V
G16-17 (TC) - Body ground	G - Body ground	Tail cancel switch signal	Tail cancel switch off	1 MΩ or higher
G16-17 (TC) - Body ground	G - Body ground	Tail cancel switch signal	Tail cancel switch on	Below 1 Ω
G16-19 (+) - Body ground	R - Body ground	High beam indicator light signal	Ignition switch ON, high beam indicator light off	Below 1 V
G16-19 (+) - Body ground	R - Body ground	High beam indicator light signal	Ignition switch ON, high beam indicator light on	11 to 14 V
G16-21 (ET) - Body ground	BR - Body ground	Ground	Always	Below 1 Ω
G16-28 (STRG) - Body ground	L - Body ground	Steering pad switch (DISP) signal	Ignition switch ON, steering pad switch (DISP) off	4.4 to 5.6 V
G16-28 (STRG) - Body ground	L - Body ground	Steering pad switch (DISP) signal	Ignition switch ON, steering pad switch (DISP) on	Below 1 V
G16-29 (HAZ) - Body ground	BE - Body ground	Turn signal switch (full turn) signal	Ignition switch ON, turn signal switch (full turn) off	4.4 to 5.6 V
G16-29 (HAZ) - Body ground	BE - Body ground	Turn signal switch (full turn) signal	Ignition switch ON, turn signal switch (full turn) on	Below 1 V
G16-33 (SW3) - Body ground	P - Body ground	Ground	Always	Below 1 Ω
G16-35 (TX1+) - Body ground	G - Body ground	Thermistor signal	Ignition switch ON	4.4 to 5.6 V
G16-34 (TX1-) - Body ground	W - Body ground	Thermistor signal ground	Always	Below 1 V
G16-36 (SW2) - Body ground	GR - Body ground	Light control rheostat signal	Ignition switch ON, light control rheostat position (min.)	Below 1 V
G16-36 (SW2) - Body ground	GR - Body ground	Light control rheostat signal	Ignition switch ON, light control rheostat position (max.)	4 to 6 V
G16-37 (SW1) - Body ground	V - Body ground	Light control rheostat signal	Always	4 to 6 V
G16-39 (IG+) - Body ground	B - Body ground	Ignition switch signal	Ignition switch off	Below 1 V
G16-39 (IG+) - Body ground	B - Body ground	Ignition switch signal	Ignition switch ON	11 to 14 V
G16-40 (B) - Body ground	Y - Body ground	Battery	Always	11 to 14 V
G17-1 (B) - Body ground	L - Body ground	Battery	Always	11 to 14 V
G17-3 (HAZ) - Body ground	GR - Body ground	Hazard warning switch signal	Ignition switch ON, hazard warning switch not pressed	11 to 14 V
G17-3 (HAZ) - Body ground	GR - Body ground	Hazard warning switch signal	Ignition switch ON, hazard warning switch pressed	Below 1 V
G17-7 (LR) - Body ground	L - Body ground	Turn signal light (RH) signal	Ignition switch ON, turn signal light (RH) off	Below 1 V
G17-7 (LR) - Body ground	L - Body ground	Turn signal light (RH) signal	Ignition switch ON, turn signal light (RH) on	11 to 14 V
G17-9 (ER) - Body ground	SB - Body ground	Turn signal switch (RH) signal	Ignition switch ON, turn signal switch (RH) off	11 to 14 V
G17-9 (ER) - Body ground	SB - Body ground	Turn signal switch (RH) signal	Ignition switch ON, turn signal switch (RH) on	Below 1 V
G17-10 (EL) - Body ground	LG - Body ground	Turn signal switch (LH) signal	Ignition switch ON, turn signal switch (LH) off	11 to 14 V
G17-10 (EL) - Body ground	LG - Body ground	Turn signal switch (LH) signal	Ignition switch ON, turn signal switch (LH) on	Below 1 V
G17-12 (FOG) - Body ground*	Y - Body ground	Front fog indicator light signal	Ignition switch ON, front fog indicator light off	Below 1 V
G17-12 (FOG) - Body ground*	Y - Body ground	Front fog indicator light signal	Ignition switch ON, front fog indicator light on	11 to 14 V
G17-13 (LL) - Body ground	Y - Body ground	Turn signal light (LH) signal	Ignition switch ON, turn signal light (LH) off	Below 1 V
G17-13 (LL) - Body ground	Y - Body ground	Turn signal light (LH) signal	Ignition switch ON, turn signal light (LH) on	11 to 14 V

*: w/ Front Fog Light

Using an oscilloscope, check waveform 1.

WAVEFORM 1 (REFERENCE)

Item	Condition
Tester Connection	G16-5 (SI) - Body ground G16-6 (+S) - 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.