Toyota Tacoma (2015-2018) Service Manual: Terminals Of Ecu

Toyota Tacoma (2015-2018) Service Manual / Meter / Gauge / Display / Meter / Gauge System / Terminals Of Ecu

TERMINALS OF ECU

1. COMBINATION METER ASSEMBLY

(a) Measure the voltage, resistance and check for pulses according to the value(s) in the table below.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
C9-1 (CANH) - Body ground	G - Body ground	CAN communication line	-	-
C9-2 (CANL) - Body ground	W - Body ground	CAN communication line	-	-
C9-4 (MSCH) - Body ground	B - Body ground	Local bus communication line	-	-
C9- 5 (MSCL) - Body ground	W - Body ground	Local bus communication line	-	-
C9-7 (EL) - Body ground	V - Body ground	LH turn indicator light signal (Input)	Ignition switch ON, LH turn signal switch off	11 to 14 V
C9-7 (EL) - Body ground	V - Body ground	LH turn indicator light signal (Input)	Ignition switch ON, LH turn signal switch on	Below 1 V
C9-8 (ER) - Body ground	GR - Body ground	RH turn indicator light signal (Input)	Ignition switch ON, RH turn signal switch off	11 to 14 V
C9-8 (ER) - Body ground	GR - Body ground	RH turn indicator light signal (Input)	Ignition switch ON, RH turn signal switch on	Below 1 V
C9-9 (SW) - Body ground	R - Body ground	Turn switch signal	Ignition switch ON, LH and RH turn signal switch off	11 to 14 V
C9-9 (SW) - Body ground	R - Body ground	Turn switch signal	Ignition switch ON, LH or RH turn signal switch on	Below 1 V
C9-11 (BKSW) - Body ground	L - Body ground	Stop light switch signal	Stop light switch on	11 to 14 V
C9-11 (BKSW) - Body ground	L - Body ground	Stop light switch signal	Stop light switch off	Below 1 V
C9-13 (HAZ) - Body ground	Y - Body ground	Hazard warning signal switch signal	Ignition switch ON, hazard warning signal switch not pressed	11 to 14 V
C9-13 (HAZ) - Body ground	Y - Body ground	Hazard warning signal switch signal	Ignition switch ON, hazard warning signal switch pressed	Below 1 V
C9-15 (ILL-) - Body ground	BE - Body ground	Illumination signal	Headlight dimmer switch off	Below 1 V
C9-15 (ILL-) - Body ground	BE - Body ground	Illumination signal	Headlight dimmer switch in tail or head position	Pulse generation
C9-17 (EP) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
C9-18 (ES) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
C9-19 (B) - Body ground	P - Body ground	Battery	Always	11 to 14 V
C9-20 (IG+) - Body ground	BE - Body ground	Ignition switch signal	Ignition switch off	Below 1 V
C9-20 (IG+) - Body ground	BE - Body ground	Ignition switch signal	Ignition switch ON	11 to 14 V
C9-21 (L) - C9-23 (E3)	BE - G	Fuel level signal	Ignition switch ON, fuel level full	Below 1 V
C9-21 (L) - C9-23 (E3)	BE - G	Fuel level signal	Ignition switch ON, fuel level low (fuel level warning light on)	4.5 to 9 V
C9-25 (S) - Body ground	LG - Body ground	Oil pressure signal	Ignition switch ON, oil pressure warning OFF	11 to 14 V
C9-25 (S) - Body ground	LG - Body ground	Oil pressure signal	Ignition switch ON, oil pressure warning ON	Below 1 V
C9-26 (WLVL) - Body ground*1	B - Body ground	Washer fluid level signal	Ignition switch ON, washer fluid level not low	11 to 14 V
C9-26 (WLVL) - Body ground*1	B - Body ground	Washer fluid level signal	Ignition switch ON, washer fluid level low	Below 1 V
C9-28 (SW) - Body ground*2	LG - Body ground	Brake fluid level signal	Ignition switch ON, brake fluid level not low	11 to 14 V
C9-28 (SW) - Body ground*2	LG - Body ground	Brake fluid level signal	Ignition switch ON, brake fluid level low	Below 1 V
C9-30 (MSM+) - Body ground	P - Body ground	Steering pad switch assembly signal	Ignition switch ON, enter, top and back switches on steering pad switch assembly not pushed	4.8 to 5.2 V
C9-30 (MSM+) - Body ground	P - Body ground	Steering pad switch assembly signal	Ignition switch ON, enter, top or back switches on steering pad switch assembly pushed	Below 1 V
C9-32 (MSSL) - Body ground	SB - Body ground	Steering pad switch assembly signal	Ignition switch ON, enter, top and back switches on steering pad switch assembly not pushed	4.8 to 5.2 V
C9-32 (MSSL) - Body ground	SB - Body ground	Steering pad switch assembly signal	Ignition switch ON, enter, top or back switches on steering pad switch assembly pushed	Below 1 V
C9-34 (MSTI) - Body ground	L - Body ground	Steering pad switch assembly signal	Ignition switch ON, up, down, right, and left switches on steering pad switch assembly not pushed	4.8 to 5.2 V
C9-34 (MSTI) - Body ground	L - Body ground	Steering pad switch assembly signal	Ignition switch ON, up, down, right, or left switches on steering pad switch assembly pushed	Below 1 V
C9-36 (OIL) - Body ground*3	W - Body ground	Oil level switch signal	Ignition switch ON, oil level low	11 to 14 V
C9-36 (OIL) - Body ground*3	W - Body ground	Oil level switch signal	Ignition switch ON, oil level not low	Below 1 V
C9-37 (VCM) - Body ground23	LG - Body ground	Vacuum switch signal	Ignition switch ON, vacuum pressure not low	11 to 14 V
C9-37 (VCM) - Body ground23	LG - Body ground	Vacuum switch signal	Ignition switch ON, vacuum pressure low	Below 1 V
C9-39 (SI) - Body ground	G - Body ground	Speed signal for other system (Input)	Ignition switch ON, wheel being rotated	Pulse generation (See waveform 1)
C9-40 (+S) - Body ground	V - Body ground	Speed signal for other system (Output)	Ignition switch ON, wheel being rotated	Pulse generation (See waveform 1)
C10-1 (B) - Body ground	V - Body ground	Battery	Always	11 to 14 V
C10-3 (RRT) - Body ground	L - Body ground	RH turn indicator light signal (Input)	Ignition switch ON, RH turn signal switch off	Below 1 V
C10-3 (RRT) - Body ground	L - Body ground	RH turn indicator light signal (Input)	Ignition switch ON, RH turn signal switch on	11 to 14 V ←→ Below 1 V
C10-5 (RLT) - Body ground	Y - Body ground	LH turn indicator light signal (Output)	Ignition switch ON, LH turn indicator light off	Below 1 V
C10-5 (RLT) - Body ground	Y - Body ground	LH turn indicator light signal (Output)	Ignition switch ON, LH turn indicator light blinking	11 to 14 V ←→ Below 1 V
C10-9 (LL) - Body ground	BE - Body ground	LH turn indicator light signal (Output)	Ignition switch ON, LH turn indicator light off	Below 1 V
C10-9 (LL) - Body ground	BE - Body ground	LH turn indicator light signal (Output)	Ignition switch ON, LH turn indicator light blinking	11 to 14 V ←→ Below 1 V
C10-11 (TLT) - Body ground*4	V - Body ground	LH turn indicator light signal (Output)	Ignition switch ON, LH turn indicator light off	Below 1 V
C10-11 (TLT) - Body ground*4	V - Body ground	LH turn indicator light signal (Output)	Ignition switch ON, LH turn indicator light blinking	11 to 14 V ←→ Below 1 V
C10-12 (TRT) - Body ground*4	SB - Body ground	RH turn indicator light signal (Output)	Ignition switch ON, RH turn signal switch off	Below 1 V
C10-12 (TRT) - Body ground*4	SB - Body ground	RH turn indicator light signal (Output)	Ignition switch ON, RH turn signal switch on	11 to 14 V ←→ Below 1 V
C10-13 (B) - Body ground	W - Body ground	Battery	Always	11 to 14 V
C10-10 (LR) - Body ground	SB - Body ground	RH turn indicator light signal (Output)	Ignition switch ON, RH turn indicator light off	Below 1 V
C10-10 (LR) - Body ground	SB - Body ground	RH turn indicator light signal (Output)	Ignition switch ON, RH turn indicator light blinking	11 to 14 V ←→ Below 1 V

*1: Washer Fluid Level Warning
*2: for Vacuum Booster Type
*3: for 2GR-FKS
*4: w/ Trailer Towing System

(1) Waveform 1 (Reference):

Item	Condition
Tool Setting	5 V/DIV., 20 ms./DIV.
Vehicle Condition	Ignition switch ON, wheel being rotated

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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