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
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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:
Dcm Operation History
DCM OPERATION HISTORY DCM OPERATION HISTORY HINT:
This function shows the telematics network status when the DCM (telematics transceiver) was operated. Use this when no DTC is present but this telematics system was unable to connect to the call center. This symptom may occur if cell phone signal
How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT HINT:
Use the following procedure to troubleshoot the power trunk lid system.
*: Use the Techstream.
PROCEDURE 1. VEHICLE BROUGHT TO WORKSHOP
NEXT 2. CUSTOMER PROBLEM ANALYSIS HINT:
In troubleshooting, confirm that the problem sym
