| 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](/t3Portal/stylegraphics/info.gif)
- 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 |
|
|
2. |
CHECK CAN COMMUNICATION SYSTEM |
(a) Check for DTCs.
for Gasoline Model: Click here
for HV Model: Click here
|
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 |
|
| C |
|
GO TO CAN COMMUNICATION SYSTEM for Gasoline Model: Click here
for HV Model: Click here
|
|
|
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 |
|
|
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)
|
|
|
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
|
| NG |
|
|
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 |
|
|
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
|
| NG |
|
|
|