Line Pressure Test

CAUTION: Carry out Line Pressure Test prior to carrying out Stall Speed Test. If line pressure is low at stall, do not carry out Stall Speed Test or further transmission damage will occur. Do not maintain wide open throttle in any gear range for more than five seconds.

Note: Certain sensor failures may cause high EPC, FMEM (Failure Mode Effect Management) actions. Be sure that self test and electrical repairs have been carried out, or test results may be incorrect.

This test verifies that the line pressure is within specifications.





Reference: Line Pressure Chart





1. Connect pressure gauge to the line pressure tap.
2. Start engine and check line pressures. Refer to the Line Pressure chart to determine if line pressure is within specifications.
3. If line pressure is not within specifications, check EPC pressure.

4. Connect Pressure Gauge to EPC pressure tap.





5. Restart engine and check EPC pressure. Refer to reference Line Pressure Chart for specification.
6. If EPC pressure is not within specification, carry out Pinpoint Test E to diagnose EPC operation. If EPC operation is OK refer to Line Pressure Diagnosis Chart for line pressure concern causes.





Line Pressure Diagnosis Chart