Engine Controls - Tests W/O Codes: Introduction
Before diagnosing symptoms or intermittent faults, perform preliminary inspection and steps in appropriate TESTS W/CODES article below. Use this article to diagnose driveability problems existing when a hard trouble code is not present.
- TESTS W/CODES (for A6)
- TESTS W/CODES (for Cabriolet)
- TESTS W/CODES (for 90)
NOTE:
Some driveability problems may have been corrected by manufacturer with a revised computer calibration chip or Powertrain Control Module (PCM). Check with manufacturer for latest chip or PCM application.
Symptom checks can direct the technician to malfunctioning component(s) for further diagnosis. A symptom should lead to a specific component, system test or adjustment. See SYMPTOMS .
Use intermittent test procedures to locate driveability problems that do not occur when the vehicle is being tested. These test procedures should also be used if a soft (intermittent) trouble code was present but no problem was found during self-diagnostic testing. See INTERMITTENTS .
NOTE:
For specific testing procedures, see apprpriate SYSTEM/COMPONENT TESTS
article. below For specifications, see appropriate ADJUSTMENTS
or SPECIFICATIONS
articles below.
- SPECIFICATIONS (for A6)
- SPECIFICATIONS (for Cabriolet)
- SPECIFICATIONS (for 90)
- ADJUSTMENTS (for A6)
- ADJUSTMENTS (for Cabriolet)
- ADJUSTMENTS (for 90)
- SYSTEM/COMPONENT TESTS (for A6)
- SYSTEM/COMPONENT TESTS (for Cabriolet)
- SYSTEM/COMPONENT TESTS (for 90)