Line Pressure Test
Line Pressure TestCAUTION: 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 5 seconds.
NOTE: Certain sensor failures may cause high electronic pressure control (EPC), failure mode effect management (FMEM) 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.
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 1,000 engine rpm and check line pressures. Refer to the line pressure chart to determine if line pressure is within specifications.
Line Pressure Chart
Line Pressure Chart (Part 1):
Line Pressure Chart (Part 2):
3. If line pressure is not within specifications, check EPC pressure.
4. Connect a pressure gauge to EPC pressure tap.
5. Start the engine, increase and maintain 1,000 engine rpm and check EPC pressure. See the line pressure chart for specification.
6. If EPC pressure is not within specification, GO to Pinpoint Test D to diagnose EPC operation. Test D: Electronic Pressure Control (EPC) Solenoid If EPC operation is OK, see the line pressure diagnosis chart for line pressure concern causes.
7. When pressure tests are done, install the pressure tap plug.
^ Tighten to 10 Nm (89 lb-inch).
Line Pressure Diagnosis Chart
Line Pressure Diagnosis Chart:
