Line Pressure Check

Line Pressure Check

Special Tools

GE 21867-A - Pressure Gauge

For equivalent regional tools refer to Special Tools Tools and Equipment

Main and Auxiliary Fluid Pump Line Pressure Check

Remove fill tube and cap.





Warning

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

1. Install a scan tool.

Note: This vehicle has "silent start" meaning the engine does not start up. To start or keep the engine running open the hood.

2. Start the engine.
3. Inspect the transmission for the proper fluid level. Refer to Transmission Fluid Level and Condition Check Transmission Fluid Level and Condition Check
4. Use the scan tool to inspect for any active or stored diagnostic trouble codes. If there are any DTC's, refer to that DTC table first.
5. Inspect the manual linkage at the transmission for proper function.
6. Turn the engine OFF.

Warning

When the transmission is at operating temperatures, take necessary precautions when removing the auxiliary pump pressure test hole plug, to avoid being burned by the catalytic converter.

Note: You may need to remove or disconnect components in order to gain access to the transmission line pressure test hole plug.

7. Remove the line pressure test hole plug.
8. Install the GE 21867-A - pressure gauge.
9. Access the Scan Tool Transmission Output Controls for the Line PC Solenoid.

Note: This vehicle has "silent start" meaning the engine does not start up. To start or keep the engine running open the hood.

10. Start the engine.

Note: In order to achieve accurate line pressure readings, the following procedure must be performed at least 3 times in order to gather uniform pressure readings. Also if you do not have the hood open the engine may go in to AutoStop.

The scan tool is only able to control the line PC solenoid in PARK and NEUTRAL with engine speeds below 1500 RPM. This protects the clutches from extreme high or low line pressures.

11. Use the scan tool to increase and decrease the Line PC Solenoid in increments of approximately 100 KPa (15 psi). The scan tool commands the increment values automatically.
12. Allow the pressure to stabilize between increments.
13. Compare your pressure readings on the scan tool to those indicated on the GE 21867-A - pressure gauge.
14. If the pressure readings vary greatly, refer to Main Fluid Pump Pressure High or Low Main Fluid Pump Pressure High or Low
15. Turn the engine OFF.
16. Remove the GE 21867-A - pressure gauge.

Caution: Refer to Fastener Caution Fastener Caution

17. Install the pressure test hole plug. Tighten the pressure plug to 11 Nm (97 lb in).