Diagnostic Aids For Driveability Complaints: Overview

91subaru05

NUMBER: 02-84-91


DATE: 11-12-91


APPLICABILITY LEGACY VEHICLES

SUBJECT: DIAGNOSTIC AIDS FOR DRIVEABLILITY COMPLAINTS


The following diagnostic aids are offered to assist you when addressing complaints relating to driveability and engine performance. It is important to determine that the customer complaint is not a normal operating characteristic before attempting to repair. Familiarize yourself with normal operating characteristics so you never get yourself in the position of trying to repair a normal characteristic.

The first chart lists four driveability symptoms and a listing of potentially failed components arranged in numerical priority. When using the chart, first choose which of the four driveability complaints you wish to troubleshoot for. Then, in the column below the symptom, proceed numerically with checking and confirming proper operation of each component referred to. As an example, when troubleshooting for a hard or no start condition, the first item to check would be for the appearance of trouble codes followed by confirming proper operation of the ignition relay and then the fuel pump, etc.

The second chart lists components and identification characteristics that may aid in the diagnosis procedure.

Refer to the applicable service manual for procedures on accessing the trouble code and clear memory modes of the self diagnosis system.

This information is designed as a general overview only based on information gathered through the Tech Helpline and FHI. It is not all inclusive nor is it intended to replace the information previously released or available through Service Bulletins, Updates or the Service Manual.