Line Pressure Check

Line Pressure Check


Tools Required
* DT 46450 Pressure Gage
* J 36648-A Pressure Gage Adapter



Important: Before performing a line pressure check, verify that the pressure control (PC) solenoid valve is receiving the correct electrical signal from the ECM.


1. Install a scan tool.

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

2. Start the engine and set the parking brake.
3. Inspect for a stored Diagnostic Trouble Code (DTC).
4. Repair the vehicle, if necessary.
5. Check the fluid level. Refer to the Transmission Fluid Check (Transmission Fluid Check) .
6. Check the manual linkage for proper adjustment.
Non Registered Caution: Refer To PSD SIE TITLE Error: SIE linked to empty Cell ID 120919
7. Turn the engine Off. Remove the transmission pressure test plug (40) and install J 36648-A and DT 46450 .
8. Put the gear selector in PARK range and set the parking brake.
9. Start the engine and allow the engine to warm up at idle.

Non Registered Notice: Refer ToPSD SIE TITLE Error: SIE linked to empty Cell ID 120919

10. Access the PC solenoid valve control test on the scan tool.
11. Increase the PC solenoid actual current from 0 to 1 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 DT 46450 .
12. Refer to the Line Pressure (Pressure, Vacuum and Temperature Specifications) specification table. Compare the data to the table.
13. If pressure readings differ greatly from the table, refer to Fluid Pressure High or Low (Fluid Pressure High or Low) .
14. Turn engine OFF. Remove the DT 46450 .
15. Inspect the pressure test plug (40) and O-ring (66) for damage.

Notice: Refer to Fastener Notice (Fastener Notice) .


Important: If the pressure test plug (40) and O-ring (66) are not damaged, they should be reused.


16. Install the transmission pressure test plug (40).

Tighten the transmission pressure test plug to 11 N.m (8 lb. ft).