Lexus ES manuals

Lexus ES: Terminals Of Ecu

TERMINALS OF ECU

TERMINALS OF ECU

*a

Component without harness connected

(Rack and Pinion Power Steering Gear Assembly)

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-

HINT:

  • The rack and pinion power steering gear assembly uses waterproof connectors. Therefore, voltage or waveforms cannot be checked with the connectors connected to the vehicle.
  • Use the Data List and Active Test on the Techstream to check the operation of the rack and pinion power steering gear assembly and check that communication is established.

    Click here

Terminal No. (Symbol)

Terminal Description

C37-4 (IG)

IG power source

C37-7 (PGND)

Power ground

C37-8 (PIG)

Power source

C37-10 (CANH)

CAN communication line

C37-11 (CANL)

CAN communication line

CHECK WIRE HARNESS SIDE CONNECTOR

*a

Front view of wire harness connector

(to Rack and Pinion Power Steering Gear Assembly)

-

-

(a) Disconnect the C37 rack and pinion power steering gear assembly.

(b) Measure the voltage and resistance according to the value(s) in the table below.

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

C37-4 (IG) - Body ground

W - Body ground

IG power source

Engine switch on (IG)

8 to 16 V

C37-7 (PGND) - Body ground

B - Body ground

Power ground

Always

Below 1 Ω

C37-8 (PIG) - Body ground

W - Body ground

Power source

Always

9 to 16 V

READ NEXT:

 Diagnosis System

DIAGNOSIS SYSTEM CHECK DLC3 (a) Check the DLC3. Click here CHECK WARNING LIGHT (a) When a problem occurs in the power steering system, the EPS warning light in the combination meter assembly comes o

 Dtc Check / Clear

DTC CHECK / CLEAR CHECK DTCs (USING TECHSTREAM) (a) Turn the engine switch off. (b) Connect the Techstream to the DLC3. (c) Turn the engine switch on (IG). (d) Turn the Techstream on. (e) Enter the fo

 Dtc Check / Clear

DTC CHECK / CLEAR CHECK DTCs (USING TECHSTREAM) (a) Turn the engine switch off. (b) Connect the Techstream to the DLC3. (c) Turn the engine switch on (IG). (d) Turn the Techstream on. (e) Enter the fo

SEE MORE:

 Parts Location

PARTS LOCATION ILLUSTRATION *1 LUGGAGE DOOR OPENING CANCEL SWITCH ASSEMBLY *2 TRUNK AND FUEL SWITCH ASSEMBLY *3 LUGGAGE COMPARTMENT DOOR OPENING SWITCH *4 DLC3 *5 MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) *6 INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - ECU-DCC NO. 2 FUSE

 Torque Sensor1 (C1511-C1514,C1521-C1523,C1528,C1531-C1555)

DESCRIPTION While torque sensor system, motor system or ECU system malfunctions are detected, the fail-safe function suspends power assist. However, power assist continues with limited assistance amount if only C1533 or C1534 is output. DTC No. Detection Item DTC Detection Condition Trouble

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