Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: IG Power Supply Voltage (C1551)

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual / Steering / Power Assist Systems / Power Steering System(for Hv Model) / IG Power Supply Voltage (C1551)

DESCRIPTION

When a malfunction is detected in the power source circuit, the fail-safe function suspends power assist.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Warning Indicate

Return-to-normal Condition

Note

C1551

IG Power Supply Voltage

When the PIG power supply voltage is normal, the IG power supply voltage is 18.5 V or higher
  • Harness or connector
  • Rack and pinion power steering gear assembly

EPS warning light: Comes on

The ECU judges the system has returned to normal

-

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 (AUXILIARY BATTERY - RACK AND PINION POWER STEERING GEAR ASSEMBLY)

(a) Disconnect the C67 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

C67-4 (IG) - Body ground

Power switch on (IG)

Below 18.5 V
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

2.

CHECK FOR DTC

(a) Clear the DTCs.

Chassis > EMPS > Clear DTCs

(b) Check for DTCs.

Chassis > EMPS > Trouble Codes

Result

Proceed to

DTC is output.

A

DTC is not output.

B
A

REPLACE RACK AND PINION POWER STEERING GEAR ASSEMBLY

B

USE SIMULATION METHOD TO CHECK

    Vehicle Speed Signal (C1541)

    PIG Power Supply Voltage (C1552,C1554)

    See More:

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