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)

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-

(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

Power 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 power switch off. (b) Connect the Techstream to the DLC3. (c) Turn the power switch on (IG). (d) Turn the Techstream on. (e) Enter the foll

 Fail-safe Chart

FAIL-SAFE CHART If a problem occurs in the power steering system, the power steering assist will be stopped or the amount of power assist will be decreased to protect the system. Power Steering System

SEE MORE:

 Installation

INSTALLATION PROCEDURE 1. INSTALL FLOW SHUTTING VALVE (WATER BY-PASS HOSE ASSEMBLY) (a) Connect the flow shutting valve (water by-pass hose assembly) to the transmission oil cooler and slide the clip to secure it. *a 2 to 7 mm (0.0787 to 0.276 in.) *b Paint Mark *c 45° (Tabs of Clip

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