Preliminary Testing And Diagnosis
WARNING: This page is about a different car, the 2002 Mazda 626. However, it is still accessible from the selected car via links, so may be relevant.
Before any diagnostic testing is carried out on vehicle, some preliminary checks must be performed, as outlined below. Be sure to write down findings, especially any DTCs found, for future reference.
- Verify that TR switch is properly adjusted in NEUTRAL.
- Verify customer concern (e.g. when does concern occur?):
- Upshift
- Downshift
- Coasting
- Engagement
- If concern involves noise or vibration, verify if it relates to any of the following:
- Engine Speed
- Vehicle Speed
- Shift
- Gear
- Range
- Temperature
- Vehicle must be at normal operating temperature.
- Inspect transaxle fluid level and condition.
- Inspect for the following items:
- Vehicle Modifications
- Electronic Add-On Items
- Leaks
- Proper Linkage Adjustments
- Perform vehicle On-Board Diagnosis Test. See DIAGNOSTIC TESTS .