Lexus ES: Terminals Of Ecu
TERMINALS OF ECU
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| 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:
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(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 .gif)
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:
SEE MORE:
Cannot Switch to Automatic ID Registration Mode
DESCRIPTION When "Change Wheel Set" is selected on the multi-information display and the "OK" switch (steering pad switch assembly) is pushed and held, the system enters ID registration mode and the tire pressure warning light blinks 3 times. The main body ECU (multiplex network body ECU) receives s
Stop Switch Circuit Malfunction (C164E)
DESCRIPTION When a stop light switch assembly circuit malfunction signal sent from the electronically controlled brake system is detected by the clearance warning ECU assembly, DTC C164E is stored. DTC No. Detection Item DTC Detection Condition Trouble Area C164E Stop Switch Circuit M
