Lexus ES manuals

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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