Diagnose and fix P1717 Ford
What is trouble code P1717
Ford automatic transmissions use four normally open shift solenoids to control transmission fluid flow into the clutch packs and band servos. Trouble code P1717 is defined as: SSD inoperative. Shift solenoids are labeled SSA – SSD and use pulse modulation to apply pressure to the clutch or band components for 1st through 5th gear and reverse.
Check and fix other trouble codes before fixing P1717
The PCM uses inputs from all these sensors to calculate shifts. If you find a trouble code for any of these, fix them FIRST before attempting to fix P1714 – P1717 or P1740
Air Conditioning (A/C) Clutch. PCM will alter shift points based on whether the AC clutch is engaged
Brake Pedal Position (BPP) Switch. PCM uses BPP signal to disengage torque converter clutch (overdrive)
Engine Coolant Temperature (ECT) Sensor. PCM will prevent shifting into overdrive when engine is cold to prevent lugging.
Electronic Ignition (EI) System. PCM will alter shifting based on misfires
Intake Air Temperature (IAT) Sensor. PCM will prevent shifting into overdrive under colder conditions to prevent lugging.
Mass Air Flow (MAF) Sensor. PCM uses MAF input to determine shift points.
Transmission Control Switch (TCS). PCM uses driver input from TCS to lock out or allow overdrive
NOTE: The Transmission Control Indicator Lamp will flash if the electronic pressure control (EPC) solenoid circuit is open, shorted to battery, ground or a fault has been detected in a monitored sensor used for transmission operation.
Throttle Position (TP) Sensor. PCM uses TP input to determine shift points
Accelerator Pedal Position (APP) Sensor. PCM uses TP input to determine shift points
Digital Transmission Range (TR) Sensor. Tells PCM which gear driver has selected. Also acts as a park/neutral switch.
Turbine Shaft Speed (TSS) Sensor. PCM compares TSS, OSS and ISSS to detect torque converter loss or internal slipping.
Output Shaft Speed (OSS) Sensor. PCM compares TSS, OSS and ISSS to detect torque converter loss or internal slipping.
Intermediate Shaft Speed Sensor. PCM compares TSS, OSS and ISSS to detect torque converter loss or internal slipping.
Pressure Control Solenoids (PCA, PCB, PCC). Transmission uses 3 PC solenoids to control line pressure for band and clutch application pressure within the transmission. To vary pressure, the PCM varies the current to the PC solenoid.
Torque Converter Clutch (TCC) Solenoid. Applies fluid pressure to the clutch in the torque converter to shift into overdrive.
Transmission Fluid Temperature (TFT) Sensor. PCM monitors transmission fluid pressure to estimate fluid flow and pressure based on known viscosity of transmission fluid at various temperatures.
Check transmission fluid level and condition. If the fluid is full and clean, proceed to the next step.
Disconnect the transmission shift solenoid wiring harness connector. Inspect the terminals for corrosion and terminal pins out of place. Using a DVOM, test for power and ground on the appropriate pins according to the wiring diagram. Next check for continuity, resistance, short to ground and open condition on shift solenoid “D”. When testing for continuity, tap on the solenoid to ensure you see a steady signal. If you see breakup of continuity, replace the solenoid pack. It cannot be replaced as an individual unit.
Buy a replacement shift STANDARD MOTOR PRODUCTS solenoid pack from Amazon
©, 2018 Rick Muscoplat
Posted on by Rick Muscoplat
- compares tss oss
- compares tss oss and isss
- converter loss or internal
- converter loss or internal slipping
- detect torque converter
- detect torque converter loss
- determine shift points
- input to determine shift
- input to determine shift points
- isss to detect torque
- isss to detect torque converter
- loss or internal slipping
- oss and isss to detect
- pcm compares tss
- pcm compares tss oss
- pcm uses tp input
- torque converter loss or internal
- tp input to determine shift
- tss oss and isss
- uses tp input to determine