ABS (DIAGNOSTICS) > Basic Diagnostic Procedure

PROCEDURE

CAUTION:

Remove foreign matter (dust, water, oil etc.) from the ABSCM&H/U connector during removal and installation.

NOTE:

• To check harness for open or short circuits, shake the suspected trouble spot or connector.

• Refer to “Check List for Interview”.

STEPCHECKYESNO

1.CHECK PRE-INSPECTION.

1) Ask the customer when and how the trouble occurred using the interview check list.

2) Before performing diagnostics, check the components which might affect ABS problems.

Are components which might affect the ABS problem operating correctly?

Repair or replace each component.

2.CHECK DTC.

1) Turn the ignition switch to OFF.

2) Connect the Subaru Select Monitor to data link connector.

3) Turn the ignition switch to ON and run the Subaru Select Monitor.

4) Read the DTC using Subaru Select Monitor.

NOTE:

If the communication function of the Subaru Select Monitor cannot be executed properly, check the communication circuit.

Is DTC displayed on Subaru Select Monitor?

Record the DTC.

3.PERFORM GENERAL DIAGNOSTICS.

1) Perform the inspection by referring to “General Diagnostic Table”.

2) Perform the Clear Memory Mode.

3) Perform the Inspection Mode.

4) Read the DTC.

5) Check the DTC is not displayed.

Does the ABS warning light go off after turning the ignition switch to ON?

Finish the diagnosis.

Check the combination meter circuit.

4.CHECK FREEZE FRAME DATA.

Using the Subaru Select Monitor, check the freeze frame data of the ABS control module.

Are freeze frame data recorded?

Record the freeze frame data.

5.PERFORM DIAGNOSIS.

1) Refer to “List of Diagnostic Trouble Code (DTC)”.

2) Correct the cause of trouble.

3) Perform the Clear Memory Mode.

4) Perform the Inspection Mode.

5) Read the DTC.

Is DTC displayed?

Repeat step 5 until DTC is not shown.

Finish the diagnosis.