DESCRIPTION
If the power steering ECU assembly detects a malfunction, the power steering ECU assembly stores a DTC and illuminates the EPS warning light.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
Note
If the power steering ECU assembly has been replaced, perform assist map writing and torque sensor zero point calibration.
Inspect the fuses for circuits related to this system before performing the following procedure.
PROCEDURE
CHECK HARNESS AND CONNECTOR
Jiggle the power steering ECU 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. |
Tech Tips
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 is turn on (READY).
Result | |||
---|---|---|---|
|
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
OK |
CHECK CAN COMMUNICATION SYSTEM
Check for DTCs.
Result | ||||||
---|---|---|---|---|---|---|
|
B |
GO TO CAN COMMUNICATION SYSTEM Click here |
A |
CHECK HARNESS AND CONNECTOR (IG POWER SUPPLY - GROUND)
*a | Front view of wire harness connector (to Power Steering ECU Assembly) |
Disconnect the F68 and F23 power steering ECU assembly connectors.
Measure the voltage according to the value(s) in the table below.
Standard Voltage | |||||||||
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|
Measure the resistance according to the value(s) in the table below.
Standard Resistance | ||||||
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|
Result | |||
---|---|---|---|
|
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
OK |
INSPECT COMBINATION METER ASSEMBLY
Connect the F68 and F23 power steering ECU assembly connectors.
Perform the Active Test of the combination meter assembly using the GTS.
Tester Display |
---|
Indicat. EPS |
Check the combination meter assembly.
OK |
---|
The EPS warning light turns on or off in accordance with the GTS operation. |
Result | ||||||||
---|---|---|---|---|---|---|---|---|
|
A |
REPLACE POWER STEERING ECU ASSEMBLY Click here |
B |
REPLACE POWER STEERING ECU ASSEMBLY Click here |
C |
GO TO METER / GAUGE SYSTEM Click here |