Line Pressure Test

The line pressure test verifies that the line pressure is within specifications.

CAUTION: Perform line pressure test before performing stall speed test. If line pressure is low at stall, do not carry out stall speed test or further transaxle damage will occur. Do not maintain WOT in any gear range for more than five seconds.

CAUTION: Transmission tester must be removed from the transaxle and the vehicle harness connected to verify these pressures.

1. Connect pressure gauge to line pressure tap.





Line Pressure Tap

2. Start engine and check line pressures. Refer to Line Pressure Chart 401 to determine if line pressure is within specifications.
3. If line pressure is not within specifications, perform on-board diagnostics and pinpoint test, air pressure check and repair main control system or pump as required.





Line Pressure Chart

Line Pressure Diagnosis
If the line pressure is low at idle in all ranges check the following items:
- Low fluid level
- Restricted inlet filter
- Loose main body
- Solenoid body or accumulator body to case bolts
- Excessive leakage in pump
- Case
- Control bodies
- Sticking main regulator valve or damaged inlet tube seal on inlet filter
- Damaged gaskets or separator plate

If the line pressure is high at idle in all ranges then check the following items:
- Main regular valve
- Solenoid body and wiring harness

- Run Quick test referred to in electrical diagnosis in this section