DTC P0990
DTC P0990: Transmission Fluid Pressure Switch E (6th Clutch) Circuit High
General Description
Transmission fluid pressure switch E (6th clutch) is installed in the hydraulic pressure circuit to the 6th clutch. When hydraulic pressure is supplied to the 6th clutch, the switch is turned on. When hydraulic pressure is not supplied to the 6th clutch, the switch is turned off. The signal from transmission fluid pressure switch E (6th clutch) is input to the powertrain control module (PCM). The PCM detects the hydraulic pressure supply conditions at the gear change to 6th gear (5th -> 6th) to reduce the shock that occurs at the gear change. If transmission fluid pressure switch E (6th clutch) is off while driving the vehicle with the rotation speed ratio of the input/output pulses is that of the 6th gear ratio, the PCM detects a transmission fluid pressure switch E (6th clutch) failure and stores a DTC.
Monitor Execution, Sequence, Duration, DTC Type, OBD Status
| Execution | Continuous | |
| Sequence | None | |
| Duration | 4 seconds or more | |
| DTC Type | Two drive cycles, MIL on, A/T gear position indicator blinks | |
| OBD Status | PASSED/FAILED/NOT COMPLETED (STILL TESTING) | |
Enable Conditions
| Condition | Minimum | Maximum | |
|---|---|---|---|
| Battery voltage [BATTERY VOLTAGE] |
11 V | - | |
| No active DTCs set (prevents monitor from running) | P0122, P0123, P0222, P0223, P0705, P0716, P0717, P0718, P0721, P0722, P0723, P0746, P0747, P0751, P0752, P0756, P0757, P0761, P0762, P0776, P0777, P0796, P0797, P0842, P0843, P0847, P0848, P0872, P0873, P0877, P0878, P0962, P0963, P0966, P0967, P0970, P0971, P0973, P0974, P0976, P0977, P0979, P0980, P0989, P1658, P1659, P1683, P1684, P2101, P2118, P2122, P2123, P2127, P2128, P2135, P2138, P2176, P2714, P2720, P2721 | ||
[ ]: HDS Parameter
Malfunction Threshold
The input signal from transmission fluid pressure switch E (6th clutch) [6TH PRESSURE SWITCH] to the PCM is high when driving in 6th gear.
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.
- Transmission fluid pressure switch E (6th clutch) OP6SW line short to power
- Transmission fluid pressure switch E (6th clutch) OP6SW line open (includes connector loose connection or disconnection)
- Transmission fluid pressure switch E (6th clutch) stuck off
- PCM internal circuit failure
Confirmation Procedure
Operating Condition
- 1.
Start the engine.
- 2.
Drive the vehicle in 6th gear for at least 4 seconds.
- Drive the vehicle in this manner only if the traffic regulations and ambient conditions allow.
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.