Last Modified: 01-30-2024 6.11:8.1.0 Doc ID: RM100000001H8MR
Model Year Start: 2019 Model: RAV4 Prod Date Range: [02/2019 - 10/2022]
Title: POWER ASSIST SYSTEMS: POWER STEERING SYSTEM (for Type A): EPS Warning Light Circuit; 2019 - 2022 MY RAV4 RAV4 HV [02/2019 - 10/2022]

EPS Warning Light Circuit

DESCRIPTION

Perform the following troubleshooting procedure when the EPS warning light remains on after the engine is started, but no DTCs are stored.

HINT:

  • If the power steering ECU (rack and pinion power steering gear assembly) detects a malfunction in the power source voltage input (IG) circuit, the EPS warning light illuminates.
  • If the power steering ECU (rack and pinion power steering gear assembly) detects a drop in the power voltage input (IG and PIG) circuit, the force required to turn the steering wheel may increase, the EPS warning light turns on in order to warn the driver.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • If the rack and pinion power steering gear assembly has been replaced, perform power steering ECU initial setting.

    Click here 2019 - 2024 MY RAV4 RAV4 HV [02/2019 -        ]; POWER ASSIST SYSTEMS: POWER STEERING SYSTEM (for Type A): UTILITY

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

PROCEDURE

1.

CHECK HARNESS AND CONNECTOR

(a) Jiggle the rack and pinion power steering gear assembly connectors and wire harness up and down, and left and right to check the illumination condition of the EPS warning light in the combination meter assembly.

OK:

The EPS warning light illumination condition does not change.

HINT:

for Gasoline Model:

  • When the EPS warning light is operating properly, it illuminates when the ignition switch is turned to ON and turns off when the engine is started.

for HV Model:

  • When the EPS warning light is operating properly, it illuminates when the power switch is turned on (IG) and turns off when the power switch on (READY).
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

2.

CHECK CAN COMMUNICATION SYSTEM

(a) Check for DTCs.

for Gasoline Model: Click here 2019 MY RAV4 [02/2019 - 10/2019]; NETWORKING: CAN COMMUNICATION SYSTEM (for Gasoline Model): DIAGNOSIS SYSTEM 2020 MY RAV4 [10/2019 - 08/2020]; NETWORKING: CAN COMMUNICATION SYSTEM (for Gasoline Model): DIAGNOSIS SYSTEM 2021 MY RAV4 [08/2020 - 12/2021]; NETWORKING: CAN COMMUNICATION SYSTEM (for Gasoline Model): DIAGNOSIS SYSTEM 2022 MY RAV4 [12/2021 - 10/2022]; NETWORKING: CAN COMMUNICATION SYSTEM (for Gasoline Model): DIAGNOSIS SYSTEM

for HV Model: Click here 2019 MY RAV4 HV [02/2019 - 10/2019]; NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): DIAGNOSIS SYSTEM 2020 MY RAV4 HV [10/2019 - 06/2020]; NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): DIAGNOSIS SYSTEM 2020 MY RAV4 HV [06/2020 - 08/2020]; NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): DIAGNOSIS SYSTEM 2021 MY RAV4 HV [08/2020 - 12/2021]; NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): DIAGNOSIS SYSTEM 2022 MY RAV4 HV [12/2021 - 10/2022]; NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): DIAGNOSIS SYSTEM

Result

Proceed to

CAN communication system DTCs are not output. (w/ Stop and Start System)

A

CAN communication system DTCs are not output. (w/o Stop and Start System)

B

CAN communication system DTCs are output.

C

B

GO TO STEP 6

C

GO TO CAN COMMUNICATION SYSTEM

for Gasoline Model: Click here 2019 - 2024 MY RAV4 [11/2018 -        ]; NETWORKING: CAN COMMUNICATION SYSTEM (for Gasoline Model): HOW TO PROCEED WITH TROUBLESHOOTING

for HV Model: Click here 2019 - 2024 MY RAV4 HV [02/2019 -        ]; NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): HOW TO PROCEED WITH TROUBLESHOOTING

A

3.

CHECK HARNESS AND CONNECTOR (IG POWER SUPPLY - GROUND)

(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

C54-8 (PIG) - Body ground

Ignition switch ON

9 to 16 V

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

C54-7 (PGND) - Body ground

Always

Below 1 Ω

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

4.

CHECK HARNESS AND CONNECTOR (IG POWER SUPPLY)

(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

8 to 16 V

NG

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

OK

5.

INSPECT COMBINATION METER ASSEMBLY

(a) Connect the C54 rack and pinion power steering gear assembly connector.

(b) Perform the Active Test of the combination meter assembly using the Techstream.

Body Electrical > Combination Meter > Active Test

Tester Display

EPS Warning

(c) Check the combination meter assembly.

OK:

The EPS warning light turns on or off in accordance with the Techstream operation.

OK

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

NG

GO TO METER / GAUGE SYSTEM

6.

CHECK HARNESS AND CONNECTOR (IG POWER SUPPLY - GROUND)

(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

8 to 16 V

C54-8 (PIG) - Body ground

Ignition switch ON

9 to 16 V

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

C54-7 (PGND) - Body ground

Always

Below 1 Ω

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

7.

INSPECT COMBINATION METER ASSEMBLY

(a) Connect the C54 rack and pinion power steering gear assembly connector.

(b) Perform the Active Test of the combination meter assembly using the Techstream.

Body Electrical > Combination Meter > Active Test

Tester Display

EPS Warning

(c) Check the combination meter assembly.

OK:

The EPS warning light turns on or off in accordance with the Techstream operation.

OK

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

NG

GO TO METER / GAUGE SYSTEM