Line Pressure Check

1. Check the fluid.
2. Remove the line pressure plug and install J 21867 Pressure Gage (A).
3. Disconnect the vacuum line from the transaxle modulator and connect J23738-A Vacuum Gage/Pump (B)to the engine vacuum line.

CAUTION: Keep the brakes applied at do times in order to prevent unexpected vehicle motion.

NOTICE: Total test running time should not be longer than two minutes, or else transmission damage could occur.

4. Start the engine and set the parking brake.
5. Note the vacuum pump gage:
^ At sea level, the engine vacuum should be at least 61 kPa (18 in Hg).
^ Engine vacuum will drop about 3.5 kPa (1 in Hg) for every increase in altitude of 305 m (1000 ft.).
^ If the engine vacuum is low, refer to POWERTRAIN MANAGEMENT for diagnosis.
6. Disconnect J23738-A vacuum gage/pump (B) from the engine vacuum line. Connect J 23738-A vacuum gage/pump. (B) to the transaxle modulator. Install a plug in the engine vacuum line to prevent a vacuum leak.
7. Raise the engine speed to 1250 RPM.
8. Check the transaxle line pressure:
^ Minimum Line Pressure-provide 61 kPa (18 in Hg) of vacuum to the modulator with J23738-A gage/pump (B).
^ Full Line Pressure-provide 0 kPa (0 in Hg) of vacuum to the modulator with J 23738-A gage/pump (B).
^ Note the pressure readings in all gear ranges for both Minimum and Full Line Pressure. Compare these readings with the information in the Line Pressure.
9. Use the High or Low Oil Pressure Condition Diagnosis Charts to diagnose the line pressure readings that are too low or too high. High or Low Oil Pressure
10. Reconnect the engine vacuum line to the transaxle modulator. Remove J 21867 pressure gage (A) with the engine off. Install the line pressure plug.