Line Pressure Test

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 the Stall Speed Test or further transmission damage willoccur. Do not maintain wide open throttle (WOT) in any gear range for more than 5 seconds.

Note: Certain sensor failures may cause high PC, FMEM (failure mode effect management) actions. Be sure that self test and electrical repairs have been carried out, or test results may be incorrect.

Note: The line pressure tap is used to verify output pressure from PC A or PC B by turning wither one off while verifying the output from the other solenoid. The second pressure tap is used to verify the output from the PC C solenoid.

The test verifies that the line pressure is within specification.

1. Connect the pressure gauge to the line pressure tap.










2. Start engine and check line preessures. Refer to the following Line Pressure Chart to determine if line pressure is within specifications.
3. If line pressure is not within specifications, check PC C pressure.






4. Connect pressure gauge to PC C pressure tap.
5. Start engine and check PC C pressure. Refer to Line Pressure Diagnosis Chart for specification.










6. If PC C pressure is not within specification, go to Pinpoint Test D to diagnose PC C operation. If PC C operation is ok, refer to Line Pressure Diagnosis Chart for line pressure concern causes.