METER / GAUGE SYSTEM TERMINALS OF ECU

COMBINATION METER ASSEMBLY

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

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
E46-1 (RLMT) - Body ground	G - Body ground	Rear seat belt warning light LH output signal	Power switch on (IG), rear seat belt warning light LH off	11 to 14 V
E46-1 (RLMT) - Body ground	G - Body ground	Rear seat belt warning light LH output signal	Power switch on (IG), rear seat belt warning light LH on	Below 1 V
E46-2 (RCMT) - Body ground	L - Body ground	Rear seat belt warning light center output signal	Power switch on (IG), rear seat belt warning light center off	11 to 14 V
E46-2 (RCMT) - Body ground	L - Body ground	Rear seat belt warning light center output signal	Power switch on (IG), rear seat belt warning light center on	Below 1 V
E46-3 (RRMT) - Body ground	R - Body ground	Rear seat belt warning light RH output signal	Power switch on (IG), rear seat belt warning light RH off	11 to 14 V
E46-3 (RRMT) - Body ground	R - Body ground	Rear seat belt warning light RH output signal	Power switch on (IG), rear seat belt warning light RH on	Below 1 V
E46-5 (SI) - Body ground	R - Body ground	Vehicle speed signal for other system (Input)	Power switch on (IG), wheel being rotated	Pulse generation (See waveform 1)
E46-6 (+S) - Body ground	V - Body ground	Vehicle speed signal for other system (Output)	Power switch on (IG), wheel being rotated	Pulse generation (See waveform 1)
E46-7 (P/SB) - Body ground	L - Body ground	Front passenger seat belt buckle switch signal	Power switch on (IG), front passenger seat occupied, and front passenger seat belt unfastened	Below 1 V
E46-7 (P/SB) - Body ground	L - Body ground	Front passenger seat belt buckle switch signal	Power switch on (IG), front passenger seat occupied, and front passenger seat belt fastened	11 to 14 V
E46-8 (LA/B)*1 - Body ground	BR - Body ground	Ground	Always	Below 1 Ω
E46-9 (S) - Body ground	V - Body ground	Engine oil pressure signal	Engine started	11 to 14 V
E46-9 (S) - Body ground	V - Body ground	Engine oil pressure signal	Engine not started	Below 1 V
E46-11 (CHK) - Body ground	LG - Body ground	MIL (Check engine warning light) signal	Power switch on (IG), MIL (Check engine warning light) off	11 to 14 V
E46-11 (CHK) - Body ground	LG - Body ground	MIL (Check engine warning light) signal	Power switch on (IG), MIL (Check engine warning light) on	Below 1 V
E46-16 (L) - E46-15 (E)	V - BR	Fuel level signal	Ignition switch ON, fuel level full	Below 1 V
E46-16 (L) - E46-15 (E)	V - BR	Fuel level signal	Ignition switch ON, fuel level low (fuel level warning light on)	4.5 to 9 V
E46-21 (ET) - Body ground	BR - Body ground	Ground	Always	Below 1 Ω
E46-24 (RLSB) - Body ground	Y - Body ground	Rear seat belt buckle switch LH signal	Power switch on (IG), rear seat belt LH unfastened	Below 1 V
E46-24 (RLSB) - Body ground	Y - Body ground	Rear seat belt buckle switch LH signal	Power switch on (IG), rear seat belt LH fastened	11 to 14 V
E46-25 (RCSB) - Body ground	L - Body ground	Rear seat belt buckle switch center signal	Power switch on (IG), rear seat belt center unfastened	Below 1 V
E46-25 (RCSB) - Body ground	L - Body ground	Rear seat belt buckle switch center signal	Power switch on (IG), rear seat belt center fastened	11 to 14 V
E46-26 (RRSB) - Body ground	R - Body ground	Rear seat belt buckle switch RH signal	Power switch on (IG), rear seat belt RH unfastened	Below 1 V
E46-26 (RRSB) - Body ground	R - Body ground	Rear seat belt buckle switch RH signal	Power switch on (IG), rear seat belt RH fastened	11 to 14 V
E46-28 (SW1) - Body ground	R - Body ground	Steering pad switch assembly signal	Power switch on (IG), enter, back and TRIP switches on steering pad switch assembly not pushed	4.3 to 6 V
			Power switch on (IG), enter switch on steering pad switch assembly pushed	Below 0.6 V
			Power switch on (IG), back switch on steering pad switch assembly pushed	2.3 to 3.2 V
			Power switch on (IG), TRIP switch on steering pad switch assembly pushed	1 to 2 V
E46-29 (TWS3)*1 - Body ground	L - Body ground	Engine coolant temperature sensor signal	Power switch on (IG), engine coolant temperature below 113°C (235°F)	0.2 to 4.8 V
E46-29 (TWS3)*1 - Body ground	L - Body ground	Engine coolant temperature sensor signal	Power switch on (IG), engine coolant temperature 120°C (248°F) or more	Below 0.15 V
E46-30 (E2)*1 - Body ground	GR - Body ground	Ground	Always	Below 1 Ω
E46-31 (CANL) - Body ground	W - Body ground	CAN communication line	-	-
E46-32 (CANH) - Body ground	LG - Body ground	CAN communication line	-	-
E46-33 (MSSL) - Body ground	W - Body ground	Steering pad switch assembly signal	Power switch on (IG), up, down, right and left switches on steering pad switch assembly not pushed	4.3 to 6 V
			Power switch on (IG), up switch on steering pad switch assembly pushed	1 to 2 V
			Power switch on (IG), down switch on steering pad switch assembly pushed	2.3 to 3.2 V
			Power switch on (IG), right switch on steering pad switch assembly pushed	3.4 to 4.1 V
			Power switch on (IG), left switch on steering pad switch assembly pushed	Below 0.6 V
E46-35 (TX1+) - E46-34 (TX1-)	G - W	Ambient temperature sensor signal	Power switch on (IG), ambient temperature 25°C (77°F)	1.38 to 1.75 V
E46-35 (TX1+) - E46-34 (TX1-)	G - W	Ambient temperature sensor signal	Power switch on (IG), ambient temperature 40°C (104°F)	0.94 to 1.2 V
E46-36 (MSCH)*2 - Body ground	G - Body ground	Local bus communication line	-	-
E46-37 (MSCL)*2 - Body ground	GR - Body ground	Local bus communication line	-	-
E46-39 (IG+) - Body ground	P - Body ground	Power switch signal	Power switch off	Below 1 V
E46-39 (IG+) - Body ground	P - Body ground	Power switch signal	Power switch on (IG)	11 to 14 V
E46-40 (B) - Body ground	W - Body ground	Auxiliary battery	Power switch off	11 to 14 V
E45-1 (B) - Body ground	B - Body ground	Auxiliary battery	Power switch off	11 to 14 V
E45-3 (HAZ) - Body ground	GR - Body ground	Hazard warning signal switch signal	Hazard warning signal switch not pressed	11 to 14 V
E45-3 (HAZ) - Body ground	GR - Body ground	Hazard warning signal switch signal	Hazard warning signal switch pressed	Below 1 V
E45-7 (LR) - Body ground	L - Body ground	RH turn indicator light signal (Output)	Power switch on (IG), RH turn indicator light off	Below 1 V
E45-7 (LR) - Body ground	L - Body ground	RH turn indicator light signal (Output)	Power switch on (IG), RH turn indicator light blinks	11 to 14 V ←→ Below 1 V
E45-9 (ER) - Body ground	P - Body ground	RH turn indicator light signal (Input)	Power switch on (IG), RH turn signal switch off	11 to 14 V
E45-9 (ER) - Body ground	P - Body ground	RH turn indicator light signal (Input)	Power switch on (IG), RH turn signal switch on	Below 1 V
E45-10 (EL) - Body ground	LG - Body ground	LH turn indicator light signal (Input)	Power switch on (IG), LH turn signal switch off	11 to 14 V
E45-10 (EL) - Body ground	LG - Body ground	LH turn indicator light signal (Input)	Power switch on (IG), LH turn signal switch on	Below 1 V
E45-13 (LL) - Body ground	Y - Body ground	LH turn indicator light signal (Output)	Power switch on (IG), LH turn indicator light off	Below 1 V
E45-13 (LL) - Body ground	Y - Body ground	LH turn indicator light signal (Output)	Power switch on (IG), LH turn indicator light blinks	11 to 14 V ←→ Below 1 V

*1: w/ Exhaust Heat Recirculation System
*2: for Radio and Display Type

Waveform 1 (Reference):

Item	Condition
Tool setting	5 V/DIV., 20 ms./DIV.
Vehicle condition	Power switch on (IG), wheel being rotated

Tech Tips

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.