DTC P0717 - ISS Sensor Low Input
Circuit Description
The input speed sensor (ISS) is threaded into the transaxle case located near
the transaxle fluid filter. The ISS produces an AC voltage of different amplitude
and frequency depending on the velocity of the input shaft. The ISS uses 8 total machined
notches off the 2nd gear clutch to produce different AC voltage signals. This ISS
signal is sent to the powertrain control module (PCM), which is used to determine
input shaft RPM. DTC P0717 sets when the PCM does not detect an ISS signal
for a certain length of time.
DTC Parameters
DTC P0717 will set if no ISS signal is detected when:
| • | The condition exists for longer than 2 seconds |
| • | The condition exists twice in one ignition cycle (2000) |
| • | The condition exists once in one ignition cycle (2001)* |
| • | The engine speed is greater than 3400 RPM |
OR
| • | DTC P0721 or P0722 is not active |
| • | The condition exists for longer than 2 seconds |
| • | The condition exists twice in one ignition cycle (2000) |
| • | The condition exists once in one ignition cycle (2001)* |
| • | The vehicle speed is greater than 10 km/h (6.2 mph) |
| • | DTC P0721 or P0722 is not active |
DTC P0717 diagnostic runs continuously once the above conditions have
been met.
DTC P0717 is a type A DTC
Diagnostic Aids
To locate an intermittent problem, use scan tool to monitor TRANSMISSION ISS
with engine running. Wiggling wires while watching for a change in TRANSMISSION ISS
may locate a problem.
Check connection and sensor for tightness.
An intermittent open anywhere in the ISS circuit or intermittent short to ground/short
to voltage on circuit 1231 will cause the TRANSMISSION ISS parameter on scan
tool to momentarily drop out.
ISS resistance: 800-1600 ohms
