Toyota Tundra Service Manual: Terminals Of Ecu

Toyota Tundra Service Manual / Steering / Steering Column / Power Tilt And Power Telescopic Steering Column System / Terminals Of Ecu

TERMINALS OF ECU

MULTIPLEX TILT AND TELESCOPIC ECU

Component without harness connected

(Multiplex Tilt and Telescopic ECU)

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

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
J174-1 (GND) - Body ground	W-B - Body ground	ECU ground	Always	Below 1 Ω
J174-2 (+B) - J174-1 (GND)	SB - W-B	Motor power source	Always	11 to 14 V
J174-3 (CANP) - J174-11 (CANN)	P - W	CAN communication	Ignition switch off	54 to 69 Ω
J174-4 (E1) - Body ground	BR - Body ground	Tilt sensor ground	Always	Below 1 Ω
J174-5 (VC) - J174-18 (MSW)	Y - GR	Tilt and telescopic switch signal	Ignition switch ON	4.9 to 5.1 V
J174-6 (TEM+) - J174-1 (GND)	G - W-B	Telescopic motor output	Ignition switch ON Steering column contracting	11 to 14 V
J174-6 (TEM+) - J174-1 (GND)	G - W-B	Telescopic motor output	Telescopic motor not operating	Below 1 V
J174-7 (TIM+) - J174-1 (GND)	B - W-B	Tilt motor output	Ignition switch ON Steering wheel tilting up	11 to 14 V
J174-7 (TIM+) - J174-1 (GND)	B - W-B	Tilt motor output	Tilt motor not operating	Below 1 V
J174-8 (GND2) - Body ground	W-B - Body ground	ECU ground	Always	Below 1 Ω
J174-9 (ECUB) - J174-1 (GND)	BE - W-B	ECU power source	Always	11 to 14 V
J174-10 (IG) - J174-1 (GND)	L - W-B	IG signal / IG power source	Ignition switch ON	11 to 14 V
J174-10 (IG) - J174-1 (GND)	L - W-B	IG signal / IG power source	Ignition switch off	Below 1 V
J174-13 (VCI) - J174-4 (E1)	SB - BR	Tilt sensor power source	Ignition switch ON	8 to 14 V
J174-14 (VCE) - J174-17 (E2)	R - BR	Telescopic sensor power source	Ignition switch ON	8 to 14 V
J174-15 (TES) - J174-17 (E2)	L - BR	Telescopic sensor signal	Telescopic motor operating	Pulse generation HI: 8 to 14 V LOW: Below 1 V
J174-16 (TIS) - J174-4 (E1)	G - BR	Tilt sensor signal	Tilt motor operating	Pulse generation HI: 8 to 14 V LOW: Below 1 V
J174-17 (E2) - Body ground	BR - Body ground	Telescopic sensor ground	Always	Below 1 Ω
J174-19 (TEM-) - J174-1 (GND)	P - W-B	Telescopic motor output	Ignition switch ON Steering column extending	11 to 14 V
J174-19 (TEM-) - J174-1 (GND)	P - W-B	Telescopic motor output	Telescopic motor not operating	Below 1 V
J174-20 (TIM-) - J174-1 (GND)	R - W-B	Tilt motor output	Ignition switch ON Steering wheel tilting down	11 to 14 V
J174-20 (TIM-) - J174-1 (GND)	R - W-B	Tilt motor output	Tilt motor not operating	Below 1 V

System Diagram

Tilt and Telescopic Manual Switch Circuit

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