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:

 Removal

REMOVAL CAUTION / NOTICE / HINT The necessary procedures (adjustment, calibration, initialization, or registration) that must be performed after parts are removed and installed, or replaced during grille shutter removal/installation are shown below. Necessary Procedure After Parts Removed/Installed/

 Components

COMPONENTS ILLUSTRATION *1 DRIVE MODE SELECT SWITCH (COMBINATION SWITCH ASSEMBLY) *2 INSTRUMENT CLUSTER FINISH PANEL ASSEMBLY

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