Erratic Scheduling
WARNING: This page is about a different car, the 2011 Ford F550 Super Duty and 2011 Ford F450 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.
DIAGNOSTIC ROUTINES - ERRATIC SCHEDULING
| Possible Component |
Reference/Action |
| 253 - ROUTINE |
| Powertrain Control System |
- CARRY OUT On-Board Diagnostic (OBD) tests. REFER to the
INTRODUCTION
article for diagnosis and testing of the PCM, APP
sensor and ECT
sensor. For diagnosing TCC
solenoid, GO to PINPOINT TEST A . For diagnosing TFT
sensor, GO to PINPOINT TEST B . For diagnosing TR
sensor, GO to PINPOINT TEST C . For diagnosing OSS
sensor, GO to PINPOINT TEST D . REPAIR as necessary. CLEAR the DTCs, ROAD TEST the vehicle and RERUN the OBD
test.
|
- PCM, vehicle wiring harnesses, transmission internal wiring harness, Torque Converter Clutch (TCC) solenoid, Output Shaft Speed (OSS) sensor, Transmission Range (TR) sensor, Accelerator Pedal Position (APP) sensor, Brake Pedal Position (BPP) switch, Engine Coolant Temperature (ECT) sensor, Power Take-Off (PTO) input, Four-Wheel Drive (4WD) switch, tow/haul switch Transmission Fluid Temperature (TFT) sensor, Failure Mode Effect Management enabled causing the TCC
to engage, disengage then engage. DTC P0741 present
|
| Solenoid Body Assembly |
- Bolts not tightened to specification
|
- TIGHTEN to specification.
|
|
|
- INSTALL a new filter gasket.
|
|
|
- DISASSEMBLE and CLEAN.
- If damaged or parts are missing, INSTALL a new solenoid body assembly. If misassembled, reassemble correctly.
|
- TCC
solenoid damaged, stuck or bore damaged. Manual valve damaged, stuck or bore damaged
|
| Torque Converter |
- REMOVE the transmission. INSPECT for damage. REFER to TORQUE CONVERTER CONTAMINATION INSPECTION in this service information. If the torque converter fails to pass the criteria for replacement or is damaged, INSTALL a new or remanufactured torque converter.
|
- Internal component failure
|