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 .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:
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On-vehicle Inspection
ON-VEHICLE INSPECTION PROCEDURE 1. CHECK FUEL PUMP OPERATION AND INSPECT FOR FUEL LEAK (a) Check fuel pump operation. (1) Connect the Techstream to the DLC3. (2) Turn the engine switch on (IG). NOTICE: Do not start the engine. (3) Turn the Techstream on. (4) Enter the following menus: Powertrain / E
Black Screen
PROCEDURE 1. CHECK DISPLAY SETTING (a) Check that the display is not in screen off mode. OK: The display setting is not in screen off mode. NG CHANGE SCREEN TO SCREEN ON MODE
OK 2. CHECK IMAGE QUALITY SETTING (a) Check that the screen color quality can be
