DTC P2747
DTC P2747: Even Gear Shaft Speed Sensor (No Signal Input)
General Description
The even gear shaft speed sensor is attached to the outside of the transmission housing. The even gear shaft speed sensor generates a pulsing signal according to the speed of the pulse plate of the main clutch. Using that signal, the powertrain control module (PCM) determines the speed of the main clutch. If no pulses occur with the main clutch rotating, the PCM detects a malfunction that may be caused by an open, a temporary open, or a short to ground. Based on the correlation between the vehicle speed measured by the output shaft speed sensor and the even gear shaft speed sensor, the PCM detects a malfunction and stores a DTC.
Monitor Execution, Sequence, Duration, DTC Type, OBD Status
| Execution | Continuous |
| Sequence | None |
| Duration | 2 seconds or more |
| DTC Type | One drive cycle, MIL on, A/T gear position indicator blinks |
| OBD Status | PASSED/FAILED/NOT COMPLETED (STILL TESTING) |
Enable Conditions
| Condition | Minimum | Maximum | |
|---|---|---|---|
| Engine speed [Engine Speed] | 500 RPM | - | |
| Vehicle speed [Vehicle Speed] | 7 mph (10 km/h) | - | |
| Battery voltage [Battery Voltage] | 11 V | - | |
| Shift lever position | D | ||
| No active DTCs set (prevents monitor from running) | P0721, P0722, P0792, P0793, P2746, P2832, P2833, P2834, P2837, P2838, P2839, P283C, P283D, P283E, P2841, P2842, P2843, P2845, P2846, P2847, P2848 | ||
| Other | Not during shifting | ||
| No electrical noise in the output shaft speed sensor output circuit | |||
[ ]: HDS Parameter
Malfunction Threshold
When the vehicle is driven at even gear:
- When the vehicle speed measured by the output shaft speed sensor [Output Shaft (CounterShaft) Speed] is 7 mph (10 km/h) or more, the vehicle speed measured by the even gear shaft speed sensor [Vehicle Speed from EVEN Shaft Speed] is 1 mph (2 km/h) or less for at least 2 seconds.
Possible Cause
- Even gear shaft speed sensor line short to ground
- Even gear shaft speed sensor line open (includes connector loose connection or disconnection)
- Even gear shaft speed sensor failure
- PCM internal circuit failure
Confirmation Procedure
With the HDS
None.
With the Driving Pattern
- Start the engine.
- Drive the vehicle at a speed of 7 mph (10 km/h) or more for at least 2 seconds.
- Drive the vehicle in this manner only if the traffic regulations and ambient conditions allow.
Diagnosis Details
Conditions for setting the DTC
When a malfunction is detected, the MIL comes on and a Pending DTC, a Confirmed DTC, and the freeze data are stored in the PCM memory.
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.