Line Pressure Test
NOTE:
Perform the line pressure test prior to performing the stall speed test. If the line pressure is low at stall, do not perform the stall speed test or transmission damage will occur. Do not maintain WOT in any transmission range for more than 5 seconds.
This test verifies the line pressure is within specification.
- 2.
Start the engine and check the line pressure. Refer to the Pressure Chart to determine if the line pressure is within specification.
Pressure Chart
| Gear | Line Pressure at Idle | Line Pressure at WOT Stall | ||
|---|---|---|---|---|
| Minimum | Maximum | Minimum | Maximum | |
| P | 92 psi (634 kPa) | 125 psi (862 kPa) | - | - |
| R | 121 psi (834 kPa) | 150 psi (1, 034 kPa) | 271 psi (1, 868 kPa) | 342 psi (2, 358 kPa) |
| N | 92 psi (634 kPa) | 125.0 psi (862 kPa) | - | - |
| D, L | 75 psi (517 kPa) | 95 psi (655 kPa) | 271 psi (1, 868 kPa) | 334 psi (2, 302 kPa) |
- 3.
If the line pressure is not within specification, see the Line Pressure Diagnosis Chart for possible source.
- 4.
When the pressure tests are complete install the line pressure tap plug.- Tighten to 12 Nm (106 lb-in).
Line Pressure Diagnosis Chart
| Test Results | Possible Source |
|---|---|
| HIGH at IDLE - ALL RANGES | Wiring Harness |
| LPC solenoid | |
| Pump (Main Pressure Regulator Valve) | |
| LOW at IDLE - ALL RANGES | Low Transmission Fluid |
| Fluid Inlet Filter/Seal | |
| Main Control Body | |
| Cross Leaks | |
| Gaskets | |
| Pump | |
| Separator Plate | |
| LOW in Park ONLY | Valve Body |
| LOW in Reverse ONLY | Separator Plate |
| Reverse Clutch | |
| Valve Body | |
| Forward Clutch | |
| LOW in Neutral ONLY | Valve Body |
| LOW in Drive O/D ONLY | Forward Clutch |
| Valve Body | |
| LOW in Manual Low ONLY | Forward Clutch |
| Valve Body |