Line Pressure Test

4F27E

Line Pressure Test

NOTICE: Carry out the Line Pressure Test prior to carrying out the Stall Speed Test. If line pressure is low at stall, do not carry out the Stall Speed Test or further transaxle damage will occur. Do not maintain Wide Open Throttle (WOT) in any gear range for more than 5 seconds.

NOTE: Certain sensor failures may cause high pressure control, Failure Mode Effect Management actions. Make sure that self-test and electrical repairs have been carried out, or test results may be incorrect.

This test verifies that the line pressure is within specifications.

1. Remove the line pressure tap plug.










2. Install a 1/8 x 28-to-1/8 x 28 pipe thread adapter into the line pressure tap.






3. Connect the Hydraulic Pressure Gauge to the adapter.

4. Start engine and check line pressures. Refer to the following Line Pressure Chart to determine if line pressure is within specifications.

5. If line pressure is not within specification, refer to Line Pressure Diagnosis Chart for line pressure concern causes.

6. Once the Line Pressure Test is complete, install the line pressure tap plug.
- Tighten to 13 Nm (115 lb-in).

Line Pressure Chart:

Line Pressure Diagnosis Chart: