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 indicator light LH signal	Power switch on (IG), rear seat belt indicator light LH off	11 to 14 V
E46-1 (RLMT) - Body ground	G - Body ground	Rear seat belt indicator light LH signal	Power switch on (IG), rear seat belt indicator light LH on	Below 1 V
E46-2 (RCMT) - Body ground	L - Body ground	Rear seat belt indicator light center signal	Power switch on (IG), rear seat belt indicator light center off	11 to 14 V
E46-2 (RCMT) - Body ground	L - Body ground	Rear seat belt indicator light center signal	Power switch on (IG), rear seat belt indicator light center on	Below 1 V
E46-3 (RRMT) - Body ground	R - Body ground	Rear seat belt indicator light RH signal	Power switch on (IG), rear seat belt indicator light RH off	11 to 14 V
E46-3 (RRMT) - Body ground	R - Body ground	Rear seat belt indicator light RH signal	Power switch on (IG), rear seat belt indicator 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)*2 - Body ground	GR - Body ground	Ground	Always	Below 1 Ω
E46-9 (S) - Body ground	V - Body ground	Oil pressure signal	Idling	11 to 14 V
E46-9 (S) - Body ground	V - Body ground	Oil pressure signal	Power switch on (IG)	Below 1 V
E46-11 (CHK) - Body ground	LG - Body ground	MIL (Check engine warning light) signal	Power switch on (IG), MIL off	11 to 14 V
E46-11 (CHK) - Body ground	LG - Body ground	MIL (Check engine warning light) signal	Power switch on (IG), MIL on	Below 1 V
E46-14 (-) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
E46-16 (L) - E46-15 (E)	V - BR	Fuel level signal	Power switch on (IG), fuel level warning off	Below 1 V
E46-16 (L) - E46-15 (E)	V - BR	Fuel level signal	Power switch on (IG), fuel level warning on	4.5 to 9 V
E46-19 (+) - Body ground	R - Body ground	High beam signal	Power switch on (IG), high beam off	Below 1 V
E46-19 (+) - Body ground	R - Body ground	High beam signal	Power switch on (IG), high beam on	11 to 14 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 buckle switch 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 buckle switch 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 buckle switch 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 buckle switch 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 buckle switch 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 buckle switch RH fastened	11 to 14 V
E46-28 (SW1)*1 - Body ground	B - Body ground	Steering pad switch assembly (DISP switch) signal	Power switch on (IG), DISP switch not pressed	4 to 5 V
E46-28 (SW1)*1 - Body ground	B - Body ground	Steering pad switch assembly (DISP switch) signal	Power switch on (IG), DISP switch pressed	Below 1 V
E46-29 (TWS3)*2 - Body ground	L - Body ground	Temperature switch signal	Power switch on (IG), "Engine coolant temperature hot warning (Engine coolant temperature symbol)" not displayed	4.9 to 5.1 V
E46-29 (TWS3)*2 - Body ground	L - Body ground	Temperature switch signal	Power switch on (IG), "Engine coolant temperature hot warning (Engine coolant temperature symbol)" displayed	Below 1 V
E46-30 (E2)*2 - 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	-	-
E46-35 (TX1+) - E46-34 (TX1-)	G - W	Ambient temperature sensor signal	Power switch on (IG)	4.4 to 5.6 V
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 switch signal	Power switch on (IG), hazard warning switch not pressed	11 to 14 V
E45-3 (HAZ) - Body ground	GR - Body ground	Hazard warning switch signal	Power switch on (IG), hazard warning 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
E45-11 (S) - Body ground	R - Body ground	Rear fog indicator light signal	Power switch on (IG), rear fog indicator light off	Below 1 V
E45-11 (S) - Body ground	R - Body ground	Rear fog indicator light signal	Power switch on (IG), rear fog indicator light on	11 to 14 V
E45-12 (FOG)*3 - Body ground	G - Body ground	Front fog indicator light signal	Power switch on (IG), front fog indicator light off	Below 1 V
E45-12 (FOG)*3 - Body ground	G - Body ground	Front fog indicator light signal	Power switch on (IG), front fog indicator light on	11 to 14 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/ Steering pad switch
*2: w/ Exhaust heat recirculation system
*3: w/ Front fog light

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.