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Home >> Mercury >> 2010 >> Mariner 2WD L4-2.5L >> Repair and Diagnosis >> Transmission and Drivetrain >> Automatic Transmission/Transaxle >> Testing and Inspection >> Component Tests and General Diagnostics >> 6F35 >> Special Testing Procedures >> Line Pressure Test

Line Pressure Test




Line Pressure Test





NOTICE: Carry out the Line Pressure Test prior to carrying out the Stall Speed Test. If the 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 transaxle range for more than 5 seconds. Stall Speed Test

This test verifies that the line pressure is within specification.

1. Connect the Transmission Fluid Pressure Gauge to the line pressure tap.

2. Start the engine and check the line pressures see the line pressure chart to determine if the line pressure is within specification.

Line Pressure Chart





a All pressures are approximate.

3. If the line pressure is not within specification, GO to Pinpoint Test A Testing and Inspection to diagnose the Line Pressure Control (LPC) operation. If LPC operation is OK, see the Line Pressure Diagnosis Chart for line pressure concern causes.

4. Once Line Pressure Test is complete, install the line pressure tap plug.
- Tighten to 12 Nm (106 lb-in).

Line Pressure Diagnosis Chart