Shift Concerns: Some/All Shifts Missing (AUTOMATIC MODE ONLY)
DIAGNOSTIC ROUTINES SHIFT CONCERNS: SOME/ALL SHIFTS MISSING (AUTOMATIC MODE ONLY)
| Possible Component | Reference/Action |
|---|---|
| 210 - ELECTRICAL ROUTINE | |
| Powertrain Control System | |
| PCM, vehicle wiring harnesses, TR sensor, intake manifold air temperature (IAT) sensor, vehicle speed sensor (VSS) input, SSA, SSB, SSC, SSD SSE and pressure control solenoid (PCA). | Carry out on-board diagnostic tests. Refer to the SELF-DIAGNOSTICS - EEC-V - GASOLINE & NGV article for diagnosis and testing of the PCM. |
| Carry out Pinpoint Tests A, C, D, and E, refer to PINPOINT TEST A: SHIFT AND TORQUE CONVERTER CLUTCH SOLENOIDS (ONLY) , PINPOINT TEST C: TRANSMISSION RANGE (TR) SENSOR , PINPOINT TEST D: ELECTRONIC PRESSURE CONTROL SOLENOID (PCA) and PINPOINT TEST E: TURBINE SHAFT SPEED (TSS) SENSOR AND OUTPUT SHAFT SPEED (OSS) SENSOR . | |
| Repair as required. Clear the DTCs, road test and rerun on-board diagnosis test. | |
| 310 - HYDRAULIC/MECHANICAL ROUTINE | |
| Some Shifts Missing ONLY | If only some of the shifts are missing, determine which shift(s) is missing. |
| Refer to the following routine(s) for further No Shift Concerns: No 1-2 Shift, Routine 220/320 No 2-3 Shift, Routine 221/321 No 3-4 Shift, Routine 222/322 No 4-3 Shift, Routine 223/323 No 3-2 Shift, Routine 224/324 No 2-1 Shift, Routine 225/325 | |
| Fluid | |
| Incorrect level. | Adjust to correct level, refer to CHECK FLUID LEVEL . |
| Condition. | Carry out Fluid Condition Check, refer to CHECK THE FLUID CONDITION . |
| Shift Cable/TR Sensor | |
| Cable system or TR sensor damaged, misaligned. | Inspect and repair as required. For shift cable information, refer to AUTOMATIC TRANSAXLE/TRANSMISSION EXTERNAL CONTROLS article. For TR sensor information, refer to TRANSMISSION RANGE (TR) SENSOR DIAGNOSIS CHART . |
| Incorrect Pressures | |
| High/Low Pressures. | Check pressure at Line tap. |
| Carry out LINE PRESSURE TEST . Follow pressure diagnosis and repair as required. | |
| Main Control | |
| Bolts not tightened to specification. | Tighten to specifications. |
| Separator plate damaged. | Inspect for damage. If damaged, repair as necessary. |
| Contamination. | Disassemble and clean. |
| Valves/springs damaged, misassembled, missing, stuck, or bore damaged. | If damaged or parts are missing, install a new main control assembly. If misassembled, reassemble correctly. DO NOT stone, file or sand valves. This will remove the anodized finish and may result in further main control or transaxle damage. |
| Fluid Pump Assembly | |
| Bolts not tightened to specification. Gasket damaged. | Tighten to specifications. Inspect for damage. If damaged, repair as necessary. |
| Porosity, cross leaks, plugged hole. | Inspect for damage. Repair as necessary. |
| Direct Clutch Assembly | |
| Seals, piston damaged | Inspect for damage. Repair as necessary. |
| Check balance dam. | Inspect for damage. Repair as necessary. |
| Friction elements damaged or worn. | Inspect for damage. Repair as necessary. |
| Return springs damaged. | Inspect for damage. Repair as necessary. |
| Forward Clutch Assembly | |
| Seals, piston damaged. | Inspect for damage. Repair as necessary. |
| Check balance dam. | Inspect for damage. Repair as necessary. |
| Friction elements damaged or worn. | Inspect for damage. Repair as necessary. |
| Return springs damaged. | Inspect for damage. Repair as necessary. |
| One-way Clutch | |
| Worn, damaged or assembled incorrectly. | Inspect for damage. Repair as necessary. |
| Servo | |
| Servo retaining ring damaged | Inspect for damage. Repair as necessary. |