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
NOTICE:
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PROCEDURE
1. |
CHECK HARNESS AND CONNECTOR |
(a) 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.
HINT:
When the EPS warning light is operating properly, it comes on when the ignition switch is turned to ON and goes off when the engine is started.
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
2. |
CHECK CAN COMMUNICATION SYSTEM |
(a) Check for DTCs.
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Result |
Proceed to |
---|---|
CAN communication system DTCs are not output. |
A |
CAN communication system DTCs are output. |
B |
B |
GO TO CAN COMMUNICATION SYSTEM |
|
3. |
CHECK HARNESS AND CONNECTOR (IG POWER SUPPLY - GROUND) |
(a) Disconnect the F68 and F23 power steering ECU assembly connectors.
*a |
Front view of wire harness connector (to Power Steering ECU Assembly) |
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
F23-1 (IG) - Body ground |
Ignition switch ON |
8 to 16 V |
F68-1 (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 |
---|---|---|
F68-2 (PGND) - Body ground |
Always |
Below 1 Ω |
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
4. |
INSPECT COMBINATION METER ASSEMBLY |
(a) Connect the F68 and F23 power steering ECU assembly connectors.
(b) Perform the Active Test of the combination meter assembly using the Techstream.
Body Electrical > Combination Meter > Active Test
Tester Display |
---|
Indicat. EPS |
(c) Check the combination meter assembly.
OK:
The EPS warning light turns on or off in accordance with the Techstream operation.
OK |
REPLACE POWER STEERING ECU ASSEMBLY |
NG |
GO TO METER / GAUGE SYSTEM |
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CHECK TIRE PRESSURE WARNING SYSTEM FUNCTION
(a) Using the Data List, check that the current tire pressure is normal.
Click here
(1) Slowly reduce the tire pressure of the front or rear tires and check that
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