P0793

DTC P0793 Intermediate Shaft Speed Sensor A

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 ECM detects the shift timing of the gears and appropriately controls the engine torque and hydraulic pressure according to various conditions. Thus smooth gear shifting is performed.

Reference (Using an oscilloscope): Check the waveform between terminals NC+ and NC- of the ECM connector.

Standard: Refer to the illustration.

MONITOR DESCRIPTION
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, 4th or 5th gear in the shift position of D, if the counter gear revolution is less than 300 rpm although the output shaft revolution is more than 1,000 rpm *2, the ECM detects the trouble, illuminates the MIL and stores the DTC.
*1: Pulse is not output or is irregularly output.
*2: The vehicle speed is 50 km/h (31 mph) or more.

Monitor Strategy:

Typical Enabling Conditions:

Typical Malfunction Thresholds:

Component Operating Range:

Wiring Diagram:

HINT: According to the DATA LIST displayed by the OBD II scan tool or intelligent tester, you can read the value of the switch, sensor, actuator and so on without parts removal. Reading the DATA LIST as the first step of troubleshooting is one method to shorten labor time.

1. READ DATA LIST
a. Warm up the engine.
b. Turn the ignition switch off.
c. Connect the OBD II scan tool or intelligent tester to the DLC3.
d. Turn the ignition switch to the on position.
e. Turn on the tester.
f. Select the item "DIAGNOSIS/ENHANCED OBD II /DATA LIST".
g. According to the display on the tester, read the "DATA LIST".

INSPECTION PROCEDURES