P0793

DTC P0793 INTERMEDIATE SHAFT SPEED SENSOR "A"

CIRCUIT DESCRIPTION

DTC Detection Condition:

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.

MONITOR DESCRIPTION

Monitor Strategy:

Typical Enabling Conditions:

Typical Malfunction Thresholds:

Component Operating Range:

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*1 although the output shaft revolution is 1,000 rpm or more*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.

Wiring Diagram:

Step 1:

Step 2-3:

INSPECTION PROCEDURE

HINT: According to the DATA LIST displayed by the hand-held 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.

NOTE: In the table, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not.

a. Warm up the engine.
b. Turn the ignition switch off.
c. Connect the hand-held tester together with the CAN VIM (controller area network vehicle interface module) to the DLC3.
d. Turn the ignition switch on (IG).
e. Turn on the tester.
f. Select the item "DIAGNOSIS/ENHANCED OBD II/DATA LIST".




g. According to the display on tester, read the "DATA LIST".

HINT:
- SPD (NC) is always 0 while driving:
Open or short in the sensor or circuit.
- SPD (NC) is always more than 0 and less than 300 rpm while driving the vehicle at 50 km/h (31 mph) or more:
Sensor trouble, improper installation, or intermittent connection trouble of the circuit.