Lexus ES manuals

Lexus ES: Terminals Of Ecu

TERMINALS OF ECU

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

G128-1 (+B) - G128-20 (E)

BR - W-B

Power source (+B)

Power switch off

11 to 14 V

G128-3 (SIG-) - G128-20 (E)

B - W-B

Ground

Always

Below 1 V

G128-4 (IND1) - G128-20 (E)

LG - W-B

Manual (SOS) switch red indicator illumination signal

For 2 seconds after turning the power switch on (IG)

1 to 8.5 V

Power switch off

Below 1 V

G128-5 (MCVD) - G128-20 (E)

B - W-B

Telephone microphone assembly power supply

Power switch on (ACC)

4 to 6 V

Power switch off

Below 1 V

G128-6 (MCI+) - G128-20 (E)

W - W-B

Receive microphone voice signal

Voice being input to telephone microphone assembly

A waveform synchronized with microphone voice signal is input

G128-7 (MCI-) - G128-20 (E)

R - W-B

Receive microphone voice signal

Always

Below 1 V

G128-13 (GSW) - G128-20 (E)

Y - W-B

Collision detection signal

Power switch on (IG)

Pulse generation (Refer to waveform1)

G128-19 (IG2) - G128-20 (E)

P - W-B

Power source (IG)

Power switch on (IG)

11 to 14 V

Power switch off

Below 1 V

G128-20 (E) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

G128-21 (SIG1) - G128-3 (SIG-)

R - G

Manual (SOS) switch button condition signal

Manual (SOS) switch not pressed

1.3 to 1.9 V

Manual (SOS) switch pressed

0.5 to 0.8 V

G128-22 (IND2) - G128-20 (E)

G - W-B

Manual (SOS) switch green indicator illumination signal

For 2 seconds after turning the power switch on (IG)

1 to 8.5 V

Power switch off

Below 1 V

G128-23 (SGND) - G128-20 (E)

Shielded - W-B

Shield ground

Always

Below 1 Ω

G128-25 (CANP)

R

CAN communication signal

-

-

G128-26 (CANN)

W

CAN communication signal

-

-

CHECK DCM (TELEMATICS TRANSCEIVER)

(a) Oscilloscope waveform:

(1) Waveform 1

Item

Condition

Tester connection

G128-13 (GSW) - G128-20 (E)

Tool setting

5.0 V/DIV., 20 ms/DIV.

Vehicle condition

Power switch on (IG)

CHECK RADIO RECEIVER ASSEMBLY

w/o Navigation System: Click here

w/ Navigation System: Click here

READ NEXT:

 Unable To Connect To Call Center

DESCRIPTION This may occur when the intensity of telephone radio frequency was very weak, or the safety connect system has a malfunction and a DTC is set. PROCEDURE 1. CHECK COMMUNICATION SERVIC

 Vehicle Control History

VEHICLE CONTROL HISTORY NOTICE: Make sure to record any output Vehicle Control History codes before clearing them and checking the Vehicle Control History again. CHECK VEHICLE CONTROL HISTORY NOTICE:

 Telephone And Gps Antenna (for Front Side)

SEE MORE:

 Lost Communication with ECM/PCM "A" Missing Message (U010087)

DESCRIPTION The engine control unit and transmission control unit are located inside the ECM. The engine control unit intercommunicates with the transmission control unit using CAN communication. If there is a problem in this intercommunication, the ECM stores this DTC. DTC No. Detection Item

 For safe driving

For safe driving, adjust the seat and mirror to an appropriate position before driving. Correct driving posture Adjust the angle of the seatback so that you are sitting straight up and so that you do not have to lean forward to steer. Adjust the seat so that you can depress the pe

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