DTC Advanced Diagnostics: P0761
DTC P0761:Shift Solenoid Valve C Stuck OFF

General Description

Hydraulic pressure supply to the clutch by shift solenoid valve output
Gear position
Neutral- 1st
1st
Neutral- Reverse
Reverse
Shift solenoid valve
A
ON
ON
ON
OFF
B
OFF
ON
OFF
OFF
C
OFF
OFF
ON
ON
1st clutch
CPCD
LINE
–
–
4th clutch
–
–
CPCD
LINE
LINE: Line pressure

CPCD: A/T clutch pressure control solenoid valve D pressure

Shift solenoid valve C is installed on the transmission housing. It is controlled by the ON/OFF signal from the powertrain control module (PCM) to apply line pressure to the reverse inhibitor valve. A signal from the PCM is output to apply A/T clutch pressure control solenoid valve pressure to the correct gear clutch according to the shift schedule. When the signal to shift solenoid valve C from the PCM is on, and the line pressure is applied to the reverse inhibitor valve, it operates against the reverse inhibitor valve spring. When the signal to shift solenoid valve C from the PCM is off, and the line pressure is discharged, the reverse inhibitor valve is inactive. The PCM monitors the input shaft (mainshaft) speed and the output shaft (countershaft) speed according to the shift status determined by the shift schedule. When an improper gear ratio is output for the shift schedule, the PCM detects a shift solenoid valve C stuck off failure and stores a DTC.

Monitor Execution, Sequence, Duration, DTC Type, OBD Status
Execution
Continuous
Sequence
None
Duration
Symptom 1-A
10 seconds or more
Symptom 1-B
3 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
ATF temperature
[ATF Temperature]
-4 °F (-20 °C)
248 °F (120 °C)
Vehicle speed
[VEHICLE SPEED]
–
3 mph (4 km/h)
Battery voltage
[BATTERY VOLTAGE]
11 V
–
Shift lever position
R
No active DTCs set (prevents monitor from running)
P0122, P0123, P0222, P0223, P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0351, P0352, P0353, P0354, P0355, P0356, P0705, P0716, P0717, P0718, P0721, P0722, P0723, P0746, P0747, P0751, P0752, P0756, P0757, 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, P0990, P1658, P1659, P1683, P1684, P2101, P2118, P2122, P2123, P2127, P2128, P2135, P2138, P2176, P2648, P2649, P2653, P2654, P2658, P2659, P2714, P2720, P2721
[ ]: HDS Parameter

Malfunction Threshold
Symptom 1-B occurs after Symptom 1-A occurred:

Symptom
Gear position commanded by the PCM
Actual gear position
1
1-A
Reverse gear in-gear
Neutral
1-B
Driving in reverse gear
Neutral

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.
Shift solenoid valve C stuck off
Reverse inhibitor valve failure
Shift fork shaft failure

Confirmation Procedure
Operating Condition
1.
Start the engine.
2.
With the brake pedal pressed, shift to R, and wait for at least 13 seconds.
3.
Shift to P.
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, the A/T gear position indicator blinks, and a Confirmed DTC and the freeze data are stored.

Conditions for clearing the DTC
The A/T gear position indicator comes off by pressing the engine start/stop button to select the OFF mode. 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.