Line Pressure Check Procedure

Line Pressure Check Procedure





Before performing a line pressure check, verify that the Pressure Control (PC) solenoid valve is receiving the correct electrical signal from the PCM:
1. Install a Scan Tool.
2. Start the engine and set the parking brake.
3. Check for a stored Diagnostic Trouble Code (DTC).
4. Repair the vehicle, if necessary.

Line Pressure Check

Caution: Keep the brakes applied at all times in order to prevent unexpected vehicle motion. Personal injury may result if the vehicle moves unexpectedly.

Notice: Total test running time should not be longer than two minutes, or else transmission damage could occur.

1. Check the fluid level. Refer to the Transmission Fluid Checking Procedure.
2. Check the manual linkage for proper adjustment.
3. Turn the engine Off. Remove the oil pressure test hole plug and install the J21867 Line Pressure Gauge.
4. Put the gear selector in PARK range and set the parking brake.
5. Start the engine and allow the engine to warm up at idle.
6. Access the PC solenoid valve control test on the Scan Tool.
7. Increase the PC solenoid actual current from 0.0 to 1.0 amps in 0.1 amp increments. Allow the pressure to stabilize for five seconds after each pressure change. Read the corresponding line pressure on the J21867 Line Pressure Gauge.





8. Compare the data to the table.
9. If pressure readings differ greatly from the table, refer to Incorrect Line Pressure.
10. Remove the J21867 Line Pressure Gauge.
11. Install the oil pressure test hole plug.