Pressure Test - PC A, PC B
Pressure Test - PC A, PC BCAUTION: Carry out Pressure Tests for PC A, B and PC C 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 will occur. Do not maintain wide open throttle in any gear range for more than 5 seconds.
NOTE: Certain sensor failures may cause high PC, Failure Mode Effect Management (FMEM) 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. Use PC PIDs and take note which solenoid, PC A or PC B, is commanded higher. Use the higher commanded PC x value when referencing the Line Pressure Charts A and B. The second pressure tap is used to verify the output from the PC C solenoid.
This test verifies that the line pressure is within specifications.
1. Connect the pressure gauge to the line pressure tap.
2. Connect the diagnostic scan tool and monitor the PC A and PC B PIDs. Note which PID is commanded higher. Use the higher commanded PC x value when referencing the Line Pressure Charts A and B.
3. Start the engine and check the line pressure reading from the gauge installed in Step 1. Refer to the Line Pressure Chart for the correct shift lever position.
4. If the line pressure is not within ranges given in Line Charts A and B, refer to Line Pressure Diagnosis Chart for line pressure concern causes.
5. Go to the PC C Pressure Test. Pressure Test - PC C
