Toyota Tundra Service 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

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

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

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

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

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

Tilt motor not operating

Below 1 V

    System Diagram

    Tilt and Telescopic Manual Switch Circuit

    See More:

    Toyota Tundra Service Manual > Power Tilt And Power Telescopic Steering Column System: Diagnosis System
    DIAGNOSIS SYSTEM 1. DESCRIPTION (a) When troubleshooting a vehicle with the diagnostic system, the only difference from the usual troubleshooting procedure is connecting the Techstream to the vehicle and reading various data output from the multiplex tilt and telescopic ECU. The multiplex tilt and t ...

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