Section 20 (Engine Controls - Tests W/Codes): Introduction
WARNING: This page is about a different car, the 1998 Volvo V70 and 1998 Volvo S70. However, it is still accessible from the selected car via links, so may be relevant.
If no faults were found while performing BASIC DIAGNOSTIC PROCEDURES, proceed with SELF-DIAGNOSTIC SYSTEM. If no fault codes or only pass codes are present, proceed to TESTS W/O CODES article for diagnosis by symptom (i.e., ROUGH IDLE, NO START, etc.).
NOTE:
All voltage tests should be performed using a Digital Volt-DVOM (DVOM) with a minimum 10-megohm input impedance, unless specifically stated otherwise in testing procedures.