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)

Always

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 engine switch on (IG)

1 to 8.5 V

Engine switch off

Below 1 V

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

B - W-B

Telephone microphone assembly power supply

Engine switch on (ACC)

4 to 6 V

Engine 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

Engine switch on (IG)

Pulse generation (Refer to waveform1)

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

P - W-B

Power source (IG)

Engine switch on (IG)

11 to 14 V

Engine 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 engine switch on (IG)

1 to 8.5 V

Engine 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

Engine 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:

 Safety Connect System (for Hv Model)

SEE MORE:

 Reverse Signal Circuit between Radio Receiver Assembly and Navigation ECU

DESCRIPTION This circuit includes the navigation ECU and radio receiver assembly. WIRING DIAGRAM PROCEDURE 1. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - NAVIGATION ECU) (a) Disconnect the G1 radio receiver assembly connector. (b) Disconnect the G14 navigation ECU connector. (c)

 Installation

INSTALLATION PROCEDURE 1. INSTALL REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY LH NOTICE: If the rear height control sensor sub-assembly LH has been struck or dropped, replace it with a new one. (a) for 2WD: (1) Engage the 2 guides. Bolt Connector (2) Install the rear height control sens

© 2016-2024 Copyright www.lexguide.net