Line Pressure Test
| Item | Description |
|---|---|
| 1 | Line pressure tap |
| 2 | Transmission fluid drain plug |
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.
NOTE:
Do not mistake the transmission fluid drain plug for the line pressure tap plug or the transmission fluid level will be low and will need to be refilled.
This test verifies the line pressure is within specification.
- 2.
Start the engine and check the line pressure. Refer to the Pressure Chart below 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 | 44 psi (303 kPa) | 70 psi (483 kPa) | 44 psi (303 kPa) | 70 psi (483 kPa) |
| R | 90 psi (621 kPa) | 115 psi (793 kPa) | 240 psi (1, 655 kPa) | 310 psi (2, 137 kPa) |
| N | 44 psi (303 kPa) | 70 psi (483 kPa) | 44 psi (303 kPa) | 70 psi (483 kPa) |
| D | 74 psi (510 kPa) | 100 psi (689 kPa) | 230 psi (1, 586 kPa) | 260 psi (1, 793 kPa) |
| L | 70 psi (483 kPa) | 100 psi (689 kPa) | 230 psi (1, 586 kPa) | 260 psi (1, 793 kPa) |
- 3.
If the line pressure is not within specification, see the Line Pressure Diagnosis Chart below for possible source.
- 4.
When the pressure tests are complete, install the line pressure tap plug.- Tighten to 9 Nm (80 lb-in).
Line Pressure Diagnosis Chart
| Test Results | Possible Source |
|---|---|
| HIGH at IDLE - ALL RANGES | Wiring Harness |
| Pressure Control Solenoid A | |
| Main 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 |