Terminals Of Ecu [06/2015 - ]

COMBINATION METER ASSEMBLY

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the voltage, resistance and waveform according to the value(s) in the table below.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
G13-1 (MSM+) - Body ground	Y - Body ground	Steering pad switch assembly signal	Power switch on (IG), enter, top and back switches on steering pad switch assembly not pushed	4.8 to 5.2 V
G13-1 (MSM+) - Body ground	Y - Body ground	Steering pad switch assembly signal	Power switch on (IG), enter, top or back switches on steering pad switch assembly pushed	Below 1 V
G13-2 (MSTI) - Body ground	SB - Body ground	Steering pad switch assembly signal	Power switch on (IG), up, down, right, and left switches on steering pad switch assembly not pushed	4.8 to 5.2 V
G13-2 (MSTI) - Body ground	SB - Body ground	Steering pad switch assembly signal	Power switch on (IG), up, down, right, or left switches on steering pad switch assembly pushed	Below 1 V
G13-4 (FCSI) - Body ground	B - Body ground	FC water release switch signal	Power switch on (IG), FC water release switch not pushed	Below 1 V
G13-4 (FCSI) - Body ground	B - Body ground	FC water release switch signal	Power switch on (IG), FC water release switch pushed	11 to 14 V
G13-16 (WLVL) -Body ground	LG - Body ground	Washer fluid levels signal	Power switch on (IG), washer fluid level not low	11 to 14 V
G13-16 (WLVL) -Body ground	LG - Body ground	Washer fluid levels signal	Power switch on (IG), washer fluid level low	Below 1 V
G13-19 (+S) - Body ground	L - Body ground	Speed signal for other system (Output)	Driving at approximately 20 km/h (12 mph)	Pulse generation (See waveform 1)
G13-20 (SI) - Body ground	R - Body ground	Speed signal for other system (Input)	Driving at approximately 20 km/h (12 mph)	Pulse generation (See waveform 1)
G13-21 (IG+) - Body ground	BE - Body ground	Power switch signal	Power switch off	Below 1 V
G13-21 (IG+) - Body ground	BE - Body ground	Power switch signal	Power switch on (IG)	11 to 14 V
G13-22 (B) - Body ground	GR - Body ground	Battery	Power switch off	11 to 14 V
G13-5 (IND) - Body ground	Y - Body ground	Warning signal output	Approximately 3 seconds after turning power switch on (IG)	Below 2.8 V
G13-24 (TR) - Body ground	B - Body ground	Light control rheostat signal	Power switch on (IG), up switch and down switch of light control rheostat not pushed	4.6 to 5.3 V
G13-24 (TR) - Body ground	B - Body ground	Light control rheostat signal	Power switch on (IG), up switch of light control rheostat pushed	Below 1 V
G13-25 (TC) - Body ground	V - Body ground	Light control rheostat signal	Power switch on (IG), up switch and down switch of light control rheostat not pushed	4.6 to 5.3 V
G13-25 (TC) - Body ground	V - Body ground	Light control rheostat signal	Power switch on (IG), up switch and down switch of light control rheostat pushed	Below 1 V
G13-26 (CANH) - Body ground	LG - Body ground	CAN communication line	-	-
G13-27 (CANL) - Body ground	W - Body ground	CAN communication line	-	-
G13-28 (ES) - Body ground	BR - Body ground	Ground	Always	Below 1 Ω
G13-39 (ILL-) - Body ground	W - Body ground	Illumination signal	Power switch on (IG), headlight dimmer switch off	11 to 14 V
G13-39 (ILL-) - Body ground	W - Body ground	Illumination signal	Power switch on (IG), headlight dimmer switch in tail or head position	Below 1 V
G13-40 (EP) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
G14-1 (B) - Body ground	P - Body ground	Battery	Power switch off	11 to 14 V
G14-10 (HAZ) - Body ground	R - Body ground	Hazard warning switch signal (Input)	Power switch on (IG), hazard warning switch not pressed	11 to 14 V
G14-10 (HAZ) - Body ground	R - Body ground	Hazard warning switch signal (Input)	Power switch on (IG), hazard warning switch pressed	Below 1 V
G14-5 (ER) - Body ground	G - Body ground	RH turn indicator light signal (Input)	Power switch on (IG), RH turn signal switch off	11 to 14 V
G14-5 (ER) - Body ground	G - Body ground	RH turn indicator light signal (Input)	Power switch on (IG), RH turn signal switch on	Below 1 V
G14-11 (EL) - Body ground	SB - Body ground	LH turn indicator light signal (Input)	Power switch on (IG), LH turn signal switch off	11 to 14 V
G14-11 (EL) - Body ground	SB - Body ground	LH turn indicator light signal (Input)	Power switch on (IG), LH turn signal switch on	Below 1 V
G14-7 (TRNR) - Body ground	GR - Body ground	RH turn indicator light signal (Output)	Power switch on (IG), RH turn indicator light off	Below 1 V
G14-7 (TRNR) - Body ground	GR - Body ground	RH turn indicator light signal (Output)	Power switch on (IG), RH turn indicator light blinking	11 to 14 V ←→ Below 1 V
G14-6 (LR) - Body ground	L - Body ground	RH turn indicator light signal (Output)	Power switch on (IG), RH turn indicator light off	Below 1 V
G14-6 (LR) - Body ground	L - Body ground	RH turn indicator light signal (Output)	Power switch on (IG), RH turn indicator light blinking	11 to 14 V ←→ Below 1 V
G14-2 (LP) - Body ground	G - Body ground	Security indicator light signal	Security indicator light off	Below 1 V
G14-2 (LP) - Body ground	G - Body ground	Security indicator light signal	Security indicator light blinking	11 to 14 V ←→ Below 1 V
G14-9 (SW) - Body ground	V - Body ground	Headlight dimmer switch assembly (full turn) signal	Headlight dimmer switch assembly on (full turn)	11 to 14 V
G14-9 (SW) - Body ground	V - Body ground	Headlight dimmer switch assembly (full turn) signal	Headlight dimmer switch assembly off	Below 1 V
G13-34 (MSCL) - Body ground	SB - Body ground	CAN communication line	-	-
G13-33 (MSCH) - Body ground	GR - Body ground	CAN communication line	-	-
G14-13 (TRNL) - Body ground	Y - Body ground	LH turn indicator light signal (Output)	Power switch on (IG), LH turn indicator light off	Below 1 V
G14-13 (TRNL) - Body ground	Y - Body ground	LH turn indicator light signal (Output)	Power switch on (IG), LH turn indicator light blinking	11 to 14 V ←→ Below 1 V
G14-12 (LL) - Body ground	B - Body ground	LH turn indicator light signal (Output)	Power switch on (IG), LH turn indicator light off	Below 1 V
G14-12 (LL) - Body ground	B - Body ground	LH turn indicator light signal (Output)	Power switch on (IG), LH turn indicator light blinking	11 to 14 V ←→ Below 1 V
G14-3 (PAON) - Body ground	R - Body ground	Passenger airbag ON indicator light signal	Power switch on (IG), occupant detection sensor on	11 to 14 V
G14-4 (P-AB) - Body ground	B - Body ground	Passenger airbag OFF indicator light signal	Power switch on (IG), occupant detection sensor off	Below 1 V

Using an oscilloscope, check waveform 1.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

WAVEFORM 1 (REFERENCE)

Item	Condition
Tester Connection	G13-19 (+S) - Body ground G13-20 (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.