Advanced Diagnostics

Advanced Diagnostics - DTC P0877: Short in Transmission Fluid Pressure Switch D (5th Clutch) Circuit, or Transmission Fluid Pressure Switch D (5th Clutch) Stuck ON










General Description
Transmission fluid pressure switch D (5th clutch) is installed in the hydraulic pressure circuit to the 5th clutch. When hydraulic pressure is supplied to the 5th clutch, the switch is turned on. When hydraulic pressure is not supplied to the 5th clutch, the switch is turned off. The signal from transmission fluid pressure switch D (5th clutch) is input to the powertrain control module (PCM). The PCM detects the hydraulic pressure supply conditions at the gear change to 5th gear (4th -> 5th) to reduce the shock that occurs at the gear change. If transmission fluid pressure switch D (5th clutch) is on while driving the vehicle with the rotation speed ratio of the input/output pulses is other than the 5th gear ratio (the ratio is Neutral or 6th), the PCM detects a transmission fluid pressure switch D (5th clutch) failure and stores a DTC.

Monitor Execution, Sequence, Duration, DTC Type, OBD Status






Enable Conditions






Malfunction Threshold
One of these conditions occurs:
- The input signal from transmission fluid pressure switch D (5th clutch) to the PCM is low for at least 5 seconds when the shift lever is in P, R, or N.
- The input signal from transmission fluid pressure switch D (5th clutch) to the PCM is low for at least 5 seconds when driving in 1st or 2nd gear.
- The input signal from transmission fluid pressure switch D (5th clutch) to the PCM is low for at least 5 seconds when the 2nd gear shift is commanded or when the shift lever is in P, R, or N, after the signal is low for at least 3 seconds when driving in 3rd, 4th, or 6th gear.

Driving Pattern
1. Start the engine.
2. Drive the vehicle until the transmission shifts into 6th gear.

- 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 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.