Hydraulic Pressure Tests
CAUTION:
Parking and service brakes must be applied throughout hydraulic pressure test. Total time for testing with vehicle in any driving gear should not exceed 2 minutes or transmission damage may occur.
- Before performing hydraulic pressure test, check fluid level and condition. Check manual control linkages for correct adjustment, and ensure engine is properly tuned.
- Connect scan tool to Data Link Connector (DLC). Apply parking brake and start engine. Check for stored Diagnostic Trouble Codes (DTC). If DTCs are present, diagnose as necessary. Turn engine off. Connect oil pressure gauge to line pressure test port. See Fig 1 or Fig 2 .
- Start engine and warm to normal operating temperature. With vehicle in Reverse, line pressure should be 64-324 psi (441-2234 kPa). With vehicle in Park, Neutral or Drive, line pressure should be 55-189 psi (379-1303 kPa).
- Shift transaxle into Park. Access Pressure Control Solenoid (PCS) test on scan tool. Increase DESIRED PCS in .1 amp increments and read corresponding line pressure on oil pressure gauge. Allow pressure to stabilize for 5 seconds after each current change. Compare readings to specifications. See LINE PRESSURE SPECIFICATIONS table. If pressure readings are not as specified, and no DTCs are present, an internal malfunction exists. See SYMPTOM DIAGNOSIS under TROUBLE SHOOTING.
NOTE:
Scan tool is only able to control PC solenoid in Park and Neutral with vehicle stopped. This protects clutches from extremely high or low pressures in Reverse and Drive.
LINE PRESSURE SPECIFICATIONS
| Application & PCS Current (Amp) | Line Pressure - psi (kPa) | |
|---|---|---|
| 2.2L, 3.8L, 4.2L & 4.3L | ||
| .00 | 169-195 (1165-1345) | |
| .10 | 167-194 (1151-1338) | |
| .20 | 161-190 (1110-1310) | |
| .30 | 155-186 (1069-1282) | |
| .40 | 144-177 (993-1220) | |
| .50 | 133-167 (917-1151) | |
| .60 | 120-153 (827-1055) | |
| .70 | 102-138 (703-952) | |
| .80 | 83-119 (572-821) | |
| .90 | 62-97 (427-629) | |
| 1.00 | 53-69 (365-476) | |
| 1.10 | 53-68 (365-469) | |
| 4.8L, 5.0L, 5.3L, 5.7L & 6.0L | ||
| .00 | 198-227 (1365-1565) | |
| .10 | 197-226 (1358-1558) | |
| .20 | 189-221 (1303-1524) | |
| .30 | 181-216 (1248-1489) | |
| .40 | 168-205 (1158-1413) | |
| .50 | 154-193 (1062-1331) | |
| .60 | 137-175 (945-1207) | |
| .70 | 114-156 (786-1076) | |
| .80 | 90-132 (621-910) | |
| .90 | 64-105 (441-724) | |
| 1.00 | 53-85 (365-586) | |
| 1.10 | 53-68 (365-469) | |