Circuit Description
This sensor detects the rotation speed of the input turbine. By comparing the input turbine speed signal (NT) with the output shaft speed, the engine control module (ECM) detects the shift timing of the gears and appropriately controls the engine torque and hydraulic pressure according to various conditions. This provides smooth gear shift.
The ECM terminal 125 detects the transmission input shaft speed. The ECM determines the gear shift timing based on a comparison of the input speed sensor (input shaft speed) with the output speed sensor (output shaft speed). When the output shaft speed is higher than the expected value and the input shaft speed is 300 rpm or less while running with the shift lever in the D position, the ECM determines that there is a malfunction of the input turbine speed sensor (NT). The ECM illuminates the MIL and stores the DTC.
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC P0717 Turbine Speed Sensor Circuit No Signal
Conditions for Running the DTC
The engine is running.
Conditions for Setting the DTC
The ECM will set the DTC if the following conditions are present:
| • | Vehicle speed is 50 km/h (31 mph) or more |
| • | Park/neutral position switch (STAR, R and L) is OFF |
| • | Speed sensor signal is less than 300 RPM |
Action Taken When the DTC Sets
| • | DTC P0717 is a type C DTC. |
| • | The malfunction indicator lamp (MIL) illuminates the first time the diagnostic runs with the fault active. |
Conditions for Clearing the MIL/DTC
The DTC will clear when conditions for setting the DTC have been repaired.
Step | Action | Values | Yes | No | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
Schematic Reference: Automatic Transmission Controls Schematics Connector End View Reference: Component Connector End Views | ||||||||||
1 | Did you perform the Diagnostic System Check - Vehicle? | -- | Go to Step 2 | |||||||
2 | Inspect for proper speed sensor installation. Is the installation bolt tightened properly and there is no clearance between the speed sensor and transaxle case? | -- | Go to Step 3 | Go to Step 6 | ||||||
3 |
Is the resistance measured within specified value? | 560 to 680 Ohms | Go to Step 4 | Go to Step 6 | ||||||
4 |
Is the resistance measured within specified value? | Between C19 terminals 125 and 124 = 560 to 680 Ohms Between C19 terminal 125 and body ground = 10 Kohms or higher Between C19 terminal 124 and body ground = 10 Kohms or higher | Go to Step 7 | Go to Step 5 | ||||||
5 | Repair or replace harness or connector of the ECM. Refer to Wiring Repairs and Connector Repairs . Did you complete the repair or replacement? | -- | Go to Step 8 | -- | ||||||
6 | Replace the speed sensor. Refer to Vehicle Speed Sensor Replacement . Did you complete the replacement? | -- | Go to Step 8 | -- | ||||||
7 | Replace the ECM. Refer to Control Module References . Did you complete the replacement? | -- | Go to Step 8 | -- | ||||||
8 |
Does the DTC reset? | -- | Go to Step 2 | System OK | ||||||
