Lexus RX (RX 350L, RX450h) 2016-2024 Repair Manual: Terminals Of Ecu

TERMINALS OF ECU

MULTIPLEX TILT AND TELESCOPIC ECU

*a

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

J25-1 (GND) - Body ground

W-B - Body ground

ECU ground

Always

Below 1 Ω

J25-2 (+B) - J25-1 (GND)

R - W-B

Motor power source

Always

11 to 14 V

J25-3 (CANP) - J25-11 (CANN)

L -GR

CAN communication

Engine switch off

54 to 69 Ω

J25-4 (E1) - Body ground

L - Body ground

Tilt sensor ground

Always

Below 1 Ω

J25-5 (VC) - J25-18 (MSW)

R - Y

Tilt and telescopic switch signal

Engine switch on (IG)

4.9 to 5.1 V

J25-6 (TEM+) - J25-1 (GND)

GR - W-B

Telescopic motor output

  • Engine switch on (IG)
  • Steering column contracting

11 to 14 V

Telescopic motor not operating

Below 1 V

J25-7 (TIM+) - J25-1 (GND)

BE - W-B

Tilt motor output

  • Engine switch on (IG)
  • Steering wheel tilting up

11 to 14 V

Tilt motor not operating

Below 1 V

J25-8 (GND2) - Body ground

W-B - Body ground

ECU ground

Always

Below 1 Ω

J25-9 (ECUB) - J25-1 (GND)

LG - W-B

ECU power source

Always

11 to 14 V

J25-10 (IG) - J25-1 (GND)

Y - W-B

IG signal / IG power source

Engine switch on (IG)

11 to 14 V

Engine switch off

Below 1 V

J25-13 (VCI) - J25-4 (E1)

B - L

Tilt sensor power source

Engine switch on (IG)

8 to 14 V

J25-14 (VCE) - J25-17 (E2)

V - B

Telescopic sensor power source

Engine switch on (IG)

8 to 14 V

J25-15 (TES) - J25-17 (E2)

BE - B

Telescopic sensor signal

Telescopic motor operating

Pulse generation

HI: 8 to 14 V

LOW: Below 1 V

J25-16 (TIS) - J25-4 (E1)

GR - L

Tilt sensor signal

Tilt motor operating

Pulse generation

HI: 8 to 14 V

LOW: Below 1 V

J25-17 (E2) - Body ground

B - Body ground

Telescopic sensor ground

Always

Below 1 Ω

J25-19 (TEM-) - J25-1 (GND)

B - W-B

Telescopic motor output

  • Engine switch on (IG)
  • Steering column extending

11 to 14 V

Telescopic motor not operating

Below 1 V

J25-20 (TIM-) - J25-1 (GND)

LG - W-B

Tilt motor output

  • Engine switch on (IG)
  • Steering wheel tilting down

11 to 14 V

Tilt motor not operating

Below 1 V

    System Diagram
    SYSTEM DIAGRAM Communication Table Transmitting ECU (Transmitter) Receiving ECU Signal Communication Method Main Body ECU (Multiplex Network Body ECU) Multiplex Tilt and Telescopic EC ...

    Tilt and Telescopic Manual Switch Circuit
    DESCRIPTION Different voltage values are sent to the multiplex tilt and telescopic ECU by operating the tilt and telescopic switch. The multiplex tilt and telescopic ECU then judges which motor and in ...

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