Fluid Level Check Using DRB
NOTE:
Engine and transaxle should be at normal operating temperature before performing this procedure.
- Start engine and apply parking brake.
- Hook up DRB scan tool and select transmission.
- Select sensors.
- Read the transmission temperature value.
- Compare the fluid temperature value with the fluid temperature chart. (Fig 1).
- Adjust transmission fluid level shown on the indicator according to the chart.
- Check transmission for leaks.
Low fluid level can cause a variety of conditions because it allows the pump to take in air along with the fluid. As in any hydraulic system, air bubbles make the fluid spongy, therefore, pressures will be low and build up slowly.
Improper filling can also raise the fluid level too high. When the transaxle has too much fluid, the gears churn up foam and cause the same conditions which occur with a low fluid level.
In either case, air bubbles can cause overheating and/or fluid oxidation, and varnishing. This can interfere with normal valve, clutch, and accumulator operation. Foaming can also result in fluid escaping from the transaxle vent where it may be mistaken for a leak.