Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: 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	Power switch is turned 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	Power switch is turned 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.
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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 C67 rack and pinion power steering gear assembly connector.

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
C67-8 (PIG) - Body ground	Always	9 to 16 V

Standard Resistance:

Tester Connection	Condition	Specified Condition
C67-7 (PGND) - Body ground	Always	Below 1 Ω

REPLACE RACK AND PINION POWER STEERING GEAR ASSEMBLY

REPAIR OR REPLACE HARNESS OR CONNECTOR

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Toyota Avalon (XX50) 2019-2022 Owners Manual