Lexus ES manuals

Lexus ES: PIG Power Supply Voltage (C1552,C1554)

DESCRIPTION

When a malfunction is detected in the PIG power source and power supply relay system, the fail-safe function suspends power assist.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Warning Indicate

Return-to-normal Condition

Note

C1552

PIG Power Supply Voltage

PIG power source circuit malfunction

  • EPS fuse
  • Harness or connector
  • Rack and pinion power steering gear assembly

EPS warning light: Comes on

Engine switch on (IG) again

-

C1554

Power Supply Relay Failure

Power source relay circuit malfunction

  • EPS fuse
  • Harness or connector
  • Rack and pinion power steering gear assembly

EPS warning light: Comes on

Engine switch on (IG) again

-

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • If the rack and pinion power steering gear assembly has been replaced, perform assist map writing and torque sensor zero point calibration.

    Click here

  • Inspect the fuses for circuits related to this system before performing the following procedure.

PROCEDURE

1.

CHECK HARNESS AND CONNECTOR (RACK AND PINION POWER STEERING GEAR ASSEMBLY - BODY GROUND)

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

*a

Front view of wire harness connector (to Rack and Pinion Power Steering Gear Assembly)

-

-

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

C37-8 (PIG) - Body ground

Always

9 to 16 V

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

C37-7 (PGND) - Body ground

Always

Below 1 Ω

OK

REPLACE RACK AND PINION POWER STEERING GEAR ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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 Removal

REMOVAL PROCEDURE 1. REMOVE FRONT WHEEL OPENING EXTENSION PAD RH Click here 2. REMOVE FRONT WHEEL OPENING EXTENSION PAD LH Click here 3. REMOVE NO. 1 ENGINE UNDER COVER Click here 4. REMOVE NO. 2 ENGINE UNDER COVER ASSEMBLY Click here 5. REMOVE OIL PRESSURE AND TEMPERATURE SENSOR (a) Dis

 Components

COMPONENTS ILLUSTRATION *1 BATTERY SERVICE HOLE COVER *2 SERVICE PLUG GRIP ILLUSTRATION *1 NO. 1 ENGINE COVER SUB-ASSEMBLY *2 INLET AIR CLEANER ASSEMBLY *3 AIR CLEANER ASSEMBLY WITH AIR CLEANER HOSE *4 COOL AIR INTAKE DUCT SEAL *5 NO. 1 ENGINE UNDER COVER -

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