Lexus ES: Terminals Of Ecu
TERMINALS OF ECU
CHECK 4WD ECU ASSEMBLY
(a) Measure the voltage and resistance of the connector.
| Terminal No. (Symbol) | Wiring Color | Terminal Description | Condition | Specified Condition |
|---|---|---|---|---|
| G131-6 (CANH) - G131-5 (CANL) | G - W | HIGH-level CAN bus wire - LOW-level CAN bus wire | Cable disconnected from negative (-) battery terminal | 54 to 69 Ω |
| G131-4 (GND) - Body ground | W-B - Body ground | Ground | Always | Below 1 Ω |
| G131-3 (IG1) - G131-4 (GND) | BE - W-B | Power source voltage | Engine switch on (IG) | 11 to 14 V |
| G131-2 (SLC+) - G131-1 (SLC-) | W - B | 4WD linear solenoid signal | D position, engine idling | Pulse generation (See waveform 1) |
If the result is not as specified, the 4WD ECU assembly may have a malfunction.
(b) Using an oscilloscope, check the waveform 1.
Waveform 1 (Reference)| Item | Content |
|---|---|
| Terminal No. (Symbol) | G131-2 (SLC+) - G131-1 (SLC-) |
| Tester Range | 2 V/DIV., 1 msec./DIV. |
| Condition | D position, engine idling |
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Control Module Communication Bus Off (U0073,U0100,U0126,U0129)
DESCRIPTION The 4WD ECU assembly inputs the signals sent from the ECM, skid control ECU (brake actuator assembly) and steering sensor via CAN communication. When DTCs indicating a CAN communication sy
Components
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Customize Parameters
CUSTOMIZE PARAMETERS CUSTOMIZE SLIDING ROOF SYSTEM HINT: The following items can be customized. NOTICE:
When the customer requests a change in a function, first make sure that the function can be customized.
Be sure to make a note of the current settings before customizing.
When troubleshooti
Warning lights and indicators
The warning lights and indicators on the instrument cluster, center
panel and
outside rear view mirrors inform the driver of the status of the vehicle's
various
systems.
Warning lights and indicators displayed on the instrument cluster
The image may differ from the actual condition.
Warni
