Basic Diagnostic Procedure: Procedure

CAUTION:

Subaru Select Monitor is required for reading DTC, reading the current data and clearing the memory.
Remove foreign matter (dust, water, oil, etc.) from the engine control module (ECM) connector when removing or installing.

NOTE:

To check the harness for broken wires or short circuits, shake problem spot or connector.
Refer to "Check List for Interview". < Refer to CHECK LIST FOR INTERVIEW . >

DIAGNOSTIC PROCEDURE CHART

Step	Check	Yes	No
1 CHECK PRE-INSPECTION. Ask the customer when and how the trouble occurred using interview check list. < Refer to CHECK LIST FOR INTERVIEW . > Check the error display. (Odo/trip meter)	Is "Er-bb" displayed on the screen?	Go to step 3.	Go to step 2.
2 BASIC INSPECTION Check the components which might affect the brake vacuum control. < Refer to INSPECTION , GENERAL DESCRIPTION. >	Is the component that might affect the vacuum control normal?	Go to step 3.	Repair or replace each component.
3 CHECK INDICATION OF DTC. Turn the ignition switch to OFF. Connect the Subaru Select Monitor to data link connector. Turn the ignition switch to ON, and the Subaru Select Monitor power switch to ON. Read the DTC. < Refer to OPERATION , READ DIAGNOSTIC TROUBLE CODE (DTC). > Record all DTC.	Is DTC displayed?	Go to step 5.	Go to step 4.
4 PERFORM GENERAL DIAGNOSTICS. Inspect using "General Diagnostic Table". < Refer to INSPECTION , General Diagnostic Table. >	Is result of inspection OK?	Finish the diagnosis.	Go to step 5.
5 PERFORM THE DIAGNOSIS. Correct the cause of trouble according to DTC. < Refer to LIST , LIST OF DIAGNOSTIC TROUBLE CODE (DTC). > Perform the clear memory mode. < Refer to OPERATION , CLEAR MEMORY MODE. > Perform the inspection mode. < Refer to PROCEDURE , INSPECTION MODE. > Read the DTC. < Refer to OPERATION , READ DIAGNOSTIC TROUBLE CODE (DTC). >	Is DTC displayed?	Repeat step 4 until DTC is not shown.	Finish the diagnosis.