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.

Line Pressure Chart:

This test verifies that the line pressure is within specifications.
1. Connect pressure gauge to the line pressure tap on the transmission and a tachometer to the engine.
2. Start the engine, increase and maintain 1000 engine rpm and check line pressures.
3. If line pressure is not within specifications, check EPC pressure.
4. Connect pressure gauge to EPC pressure tap.





5. Start the engine, increase and maintain 1000 engine rpm and check EPC pressure, refer to the line pressure chart in Diagnostics 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 the line pressure diagnosis chart in Diagnostics for line pressure concern causes.