Basic Diagnostic Procedure: Procedure

CAUTION:

The power steering control module continues to operate after the engine stops and calculate the temperature in the control module. Therefore, before starting service of the power steering system which requires disconnection of the connector, stop the engine and allow approx. 30 minutes until the control module becomes cold.
Before removal or installation, be sure to remove any foreign matter (dust, moisture, oil, etc.) from the power steering control module connector.
Depending on the ignition switch ON/OFF timing, the current code of EPS may not be able to be shifted to the history code. If the current code of EPS remains when DTC is checked, be sure to turn the ignition switch to OFF once, wait for approximately 30 seconds, and turn the ignition switch to ON again. After turning the ignition switch to ON again, be sure to record the obtained malfunction information.
Do not perform the clear memory until the repair or replacement of faulty parts is completed.
If a problem (connector terminal with foreign matter, etc.) is found, record the faulty part (take a photo • store the foreign matter, etc.).

PERFORM CUSTOMER INTERVIEW .
Ask the customer when and how the trouble occurred using the Check List for Interview. Ref. to POWER STEERING (DIAGNOSTICS)>CHECK LIST FOR INTERVIEW .

Did you interview the customer?

Yes: Go to 2.

No: Perform the interview, and Go to 2.
BASIC INSPECTION .
Perform basic inspection. Ref. to POWER STEERING (DIAGNOSTICS)>GENERAL DESCRIPTION>INSPECTION .

Is the check result OK?

Yes: Go to 3.

No: Repair the faulty part found in basic inspection, and Go to 3.
CHECK WARNING LIGHT .
Check the lighting condition of STEERING warning light in the combination meter.

Does the STEERING warning light illuminate?

Yes: Go to 4.

No: Currently, it is normal.
CHECK SUBARU SELECT MONITOR COMMUNICATION .
1. Turn the ignition switch to OFF.
2. Connect the Subaru Select Monitor to data link connector. Ref. to COMMON (DIAGNOSTICS)>DATA LINK CONNECTOR .
3. Turn the ignition switch to ON and run the Subaru Select Monitor.
4. Select [Power Steering System].
  NOTE: For detailed operation procedures, refer to "Help" of application.
Is communication possible?

Yes: Go to 5.

No: Check the communication circuit. Ref. to POWER STEERING (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE FOR SUBARU SELECT MONITOR COMMUNICATION .
CHECK DTC .
Read the DTC of [Power Steering System] using the Subaru Select Monitor. Ref. to POWER STEERING (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .

Are any DTCs displayed?

Yes: Record the DTC, time stamp and freeze frame data. Ref. to COMMON (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) . Ref. to COMMON (DIAGNOSTICS)>FREEZE FRAME DATA . Ref. to COMMON (DIAGNOSTICS)>TIME STAMP . Go to 7.

No: Go to 6.
PERFORM GENERAL DIAGNOSTICS .
1. Execute the inspection mode. Ref. to POWER STEERING (DIAGNOSTICS)>INSPECTION MODE .
2. Read the DTC of [Power Steering] using the Subaru Select Monitor. Ref. to POWER STEERING (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .
3. Check that the DTC is not displayed.
Does the STEERING warning light illuminate at ignition switch ON, and turn off two seconds after the engine is started?

Yes: Finish the diagnosis.

No: Ref. to POWER STEERING (DIAGNOSTICS)>WARNING LIGHT ILLUMINATION PATTERN>STEERING WARNING LIGHT DOES NOT GO OFF .
PERFORM DIAGNOSIS .
1. Perform the diagnosis for the displayed DTCs. Ref. to POWER STEERING (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC)>LIST .
2. Repair or replace the cause of trouble.
3. Execute the inspection mode. Ref. to POWER STEERING (DIAGNOSTICS)>INSPECTION MODE .
4. Read the DTC of [Power Steering] using the Subaru Select Monitor. Ref. to POWER STEERING (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .
Is DTC displayed in current code?

Yes: Repeat step 7 until DTC is not shown.

No: Clear the memory to finish the diagnosis. Ref. to COMMON (DIAGNOSTICS)>CLEAR MEMORY .