DTC Advanced Diagnostics: P0715
DTC P0715:Input Shaft (Mainshaft) Speed Sensor Circuit Malfunction

General Description

The input shaft (mainshaft) speed sensor is attached to the transmission housing to sense input shaft (mainshaft) revolutions. The powertrain control module (PCM) determines the vehicle speed according to the signal from the input shaft (mainshaft) speed sensor for the control units. If no signal from the input shaft (mainshaft) speed sensor is received for a set time, the PCM detects a malfunction and stores a DTC.

Monitor Execution, Sequence, Duration, DTC Type, OBD Status
Execution
Continuous
Sequence
None
Duration
20 seconds or more
DTC Type
Two drive cycles, MIL off
OBD Status
PASSED/FAILED/NOT COMPLETED (STILL TESTING)

Enable Conditions
Condition
Minimum
Maximum
Engine coolant temperature
[ECT SENSOR 1]
156 °F (69 °C)
–
Engine speed
[ENGINE SPEED]
1,000 rpm*
–
Battery voltage [BATTERY]
10.0 V
–
No active DTCs set (prevents monitor from running)
P0117, P0118, P0122, P0123, P0222, P0223, P060A, P1683, P1684, P2101, P2118, P2122, P2123, P2127, P2128, P2135, P2138, P2176
*: Engine speed must not be 1,000 rpm or more if the throttle position is 2.0 ° or more.

[ ]: HDS Parameter

Malfunction Threshold
No signal from the input shaft (mainshaft) speed sensor is detected for at least 20 seconds.

Possible Cause
NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
Input shaft (mainshaft) speed sensor NM line short to ground
Input shaft (mainshaft) speed sensor NM line open
Input shaft (mainshaft) speed sensor connector disconnection
Input shaft (mainshaft) speed sensor failure
PCM internal circuit failure

Confirmation Procedure
Operating Condition
Start the engine. Hold the engine speed [ENGINE SPEED] at 3,000 rpm without load (in neutral) until the radiator fan comes on, then let it idle.

With the HDS
None.

Diagnosis Details
Conditions for setting the DTC
When a malfunction is detected during the first drive cycle, a Pending DTC is stored in the PCM memory. If the malfunction returns in the next (second) drive cycle, the MIL comes on and a Confirmed DTC and the freeze data are stored.

Conditions for clearing the DTC
The MIL is cleared if the malfunction does not return in three consecutive trips in which the diagnostic runs. The MIL, the Pending DTC, the Confirmed DTC, and the freeze data can be cleared with the scan tool Clear command or by disconnecting the battery.