Last Modified: 01-30-2024 6.11:8.1.0 Doc ID: RM100000001HD55
Model Year Start: 2019 Model: RAV4 Prod Date Range: [02/2019 -           ]
Title: POWER ASSIST SYSTEMS: POWER STEERING SYSTEM (for Type B): C1551; IG Power Supply Voltage; 2019 - 2024 MY RAV4 RAV4 HV [02/2019 -        ]

DTC

C1551

IG Power Supply Voltage

DESCRIPTION

When a problem occurs in the power source circuit, the fail-safe function works to stop the 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
  • Stop and start system (w/ Stop and Start System)

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 2019 - 2024 MY RAV4 RAV4 HV [02/2019 -        ]; POWER ASSIST SYSTEMS: POWER STEERING SYSTEM (for Type B): CALIBRATION

  • 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 C54 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

C54-4 (IG) - Body ground

Ignition switch ON

Below 18.5 V

NG (w/o Stop and Start System)

REPAIR OR REPLACE HARNESS OR CONNECTOR

NG (w/ Stop and Start System)

GO TO STOP AND START SYSTEM (BACKUP BOOST CONVERTER CIRCUIT) 2019 MY RAV4 [11/2018 - 10/2019]; STOP AND START: STOP AND START SYSTEM: Backup Boost Converter Circuit 2020 MY RAV4 [10/2019 - 08/2020]; STOP AND START: STOP AND START SYSTEM: Backup Boost Converter Circuit 2021 MY RAV4 [08/2020 - 12/2021]; STOP AND START: STOP AND START SYSTEM: Backup Boost Converter Circuit 2022 MY RAV4 [12/2021 - 10/2022]; STOP AND START: STOP AND START SYSTEM: Backup Boost Converter Circuit 2023 MY RAV4 [10/2022 - 10/2023]; STOP AND START: STOP AND START SYSTEM: Backup Boost Converter Circuit 2024 MY RAV4 [10/2023 -        ]; STOP AND START: STOP AND START SYSTEM: Backup Boost Converter Circuit

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 2019 MY RAV4 RAV4 HV [02/2019 - 10/2019]; STEERING GEAR / LINKAGE: STEERING GEAR: REMOVAL 2020 MY RAV4 RAV4 HV [10/2019 - 08/2020]; STEERING GEAR / LINKAGE: STEERING GEAR: REMOVAL 2021 MY RAV4 RAV4 HV [08/2020 - 12/2021]; STEERING GEAR / LINKAGE: STEERING GEAR: REMOVAL 2022 MY RAV4 RAV4 HV [12/2021 - 10/2022]; STEERING GEAR / LINKAGE: STEERING GEAR: REMOVAL 2023 MY RAV4 RAV4 HV [10/2022 - 10/2023]; STEERING GEAR / LINKAGE: STEERING GEAR: REMOVAL 2024 MY RAV4 RAV4 HV [10/2023 -        ]; STEERING GEAR / LINKAGE: STEERING GEAR: REMOVAL

B

USE SIMULATION METHOD TO CHECK