Circuit Description
This sensor detects the rotation speed of the counter gear. By comparing the counter gear speed signal (NC) with the direct clutch speed sensor signal (NT), 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 NC terminal of the ECM detects a revolution signal from the speed sensor (NC) (counter gear rpm). The ECM calculates a gearshift comparing the speed sensor (NT) with the speed sensor (NC). While the vehicle is operating in 2nd, 3rd or 4th (O/D) gear in the shift position D, if the counter gear revolution is less than 300 rpm although the output shaft revolution is more than 1,000 rpm, the ECM detects the trouble, illuminates the MIL and stores the DTC.
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC P0793 Intermediate Shaft Speed Sensor "A"
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 |
| • | Pulse in not output or is irregularly output |
Action Taken When the DTC Sets
| • | DTC P0793 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 E7 terminals 34 and 26 = 560 to 680 Ohms Between E7 terminal 34 and body ground = 10 Kohms or higher Between E7 terminal 26 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 | ||||||
