P0793
DTC P0793 Intermediate Shaft Speed Sensor "A"DESCRIPTION
P0793:
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 approximately controls the engine torque and hydraulic pressure according to various conditions. Thus smooth gear shifting is performed.
Reference::
1. Reference: Inspect using an oscilloscope.
Check the waveform of the ECM connector.
Standard voltage: 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 or O/D gear in the shift lever on D, if the counter gear revolution is less than 300 rpm*1 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:
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS:
TYPICAL ENABLING CONDITIONS
TYPICAL MALFUNCTION THRESHOLDS:
TYPICAL MALFUNCTION THRESHOLDS
COMPONENT OPERATING RANGE:
COMPONENT OPERATING RANGE
WIRING DIAGRAM:
WIRING DIAGRAM
HINT: Using the intelligent tester's DATA LIST allows switch, sensor, actuator and other item values to be read without removing any parts. Reading the DATA LIST early in troubleshooting is one way to save time.
NOTICE: In the table below, 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.
1. Warm up the engine.
2. Turn the ignition switch OFF.
3. Connect the intelligent tester to the DLC3.
4. Turn the ignition switch ON.
5. Turn the intelligent tester ON.
6. On the intelligent, enter these menus: DIAGNOSIS / ENHANCED OBD II / DATA LIST.
7. Follow the instructions on the tester and 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.
