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DTC Advanced Diagnostics: P0752
DTC P0752 : Shift Solenoid Valve A Stuck ON
General Description
Shift solenoid valve A is installed on the valve body assembly. It is controlled by the ON/OFF signal from the transmission control module (TCM) to apply line pressure to the two-way clutch actuator valve. The two-way clutch is operated by driving the two-way clutch actuator valve with shift solenoid valves A, B, and D and clutch pressure control solenoid valve B. The two-way clutch actuator valve stroke sensor which measures the stroke position of the two-way clutch actuator valve is structured by two systems as the sensor characteristics are shown as in the figure. When the stroke value of the two-way clutch actuator valve stroke sensor is approximately 4.7 mm (0.19 in) or more, the two-way clutch is in reverse position, and when it is approximately -4.8 mm (-0.19 in) or less, it is in forward position. For detecting the malfunction, the TCM uses the values of the two-way clutch actuator valve stroke sensor and transmission fluid pressure switch B when the two-way clutch is switch controlled to the reverse position. If the two-way clutch actuator valve stroke sensor value is in abnormal range and transmission fluid pressure switch B is ON for a specified time when the two-way clutch is switch controlled to the reverse position, the TCM detects a shift solenoid valve A stuck on failure and stores a DTC.
Monitor Execution, Sequence, Duration, DTC Type
| Execution | Continuous |
| Sequence | None |
| Duration | 1.3 seconds or more |
| DTC Type | Two drive cycles, MIL on, shift position indicator blinks |
Enable Conditions
| Condition | Minimum | Maximum | |
|---|---|---|---|
| Engine speed [Engine Speed] | 500 RPM | - | |
| 12 volt battery voltage [Battery Voltage] | 10 V | - | |
| Clutch C3 command pressure | 1, 050 kPa (10.7 kgf/cm 2, 152.3 psi) | - | |
| Control command to shift solenoid valve A | OFF | ||
| Control command to shift solenoid valve B | ON | ||
| Control command to shift solenoid valve D | OFF | ||
| Other | Two-way clutch is in forward position when two-way clutch is started to switch control to reverse position (two-way clutch actuator valve stroke sensor value is -4.8 mm (-0.19 in) or less) | ||
[ ]: HDS Parameter
Malfunction Threshold
The two-way clutch actuator valve stroke sensor value is more than 4.7 mm (0.19 in) and transmission fluid pressure switch B is ON for at least 1.3 seconds when the two-way clutch is switch controlled to the reverse position.
Possible Cause
The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
- Valve body assembly failure (shift solenoid valve A stuck on)
Confirmation Procedure
Operating Condition
- Start the engine, and wait for at least 5 seconds in P position/mode.
- Test-drive the vehicle from 1st gear to 2nd gear, then slow down and stop the vehicle.
- While pressing the brake pedal, shift the transmission to R position/mode.
- 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 TCM memory. If the malfunction returns in the next (second) drive cycle, the MIL comes on, the shift position indicator blinks, and a Confirmed DTC and the freeze data are stored.
Conditions for clearing the DTC
The shift position indicator comes off by turning the vehicle to the OFF (LOCK) 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.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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