DTC P1732
DTC P1732: Shift Error D
General Description
Hydraulic pressure supply to the clutch by shift solenoid valve output (D position)
| Gear position (N: Neutral) |
N-1st | 1st | 1st-2nd | 2nd | 2nd-3rd | 3rd | 3rd-4th | 4th | 4th-5th | 5th | |
| Shift solenoid valve | A | OFF | ON | OFF | OFF | OFF | OFF | OFF | ON | ON | ON |
| B | ON | ON | ON | ON | ON | OFF | OFF | OFF | OFF | OFF | |
| C | ON | ON | ON | OFF | ON | ON | OFF | OFF | OFF | ON | |
| D | OFF | OFF | OFF | ON | ON | OFF | OFF | OFF | ON | ON | |
| E | OFF | OFF | OFF | OFF/ON | OFF/ON | OFF/ON | OFF/ON | OFF/ON | OFF/ON | OFF/ON | |
| 1st clutch | CPC A | LINE | CPC A | - | CPC A | - | - | - | - | - | |
| 2nd clutch | CPC B | - | CPC B | LINE | CPC B | - | CPC A | - | - | - | |
| 3rd clutch | CPC C | - | CPC C | - | CPC C | CPC C | CPC C | - | - | - | |
| 4th clutch | - | - | - | - | - | - | CPC B | CPC B | CPC B | - | |
| 5th clutch | - | - | - | - | - | - | - | - | CPC C | CPC C | |
LINE: Line pressure
CPC A: A/T clutch pressure control solenoid valve A pressure
CPC B: A/T clutch pressure control solenoid valve B pressure
CPC C: A/T clutch pressure control solenoid valve C pressure
Hydraulic pressure to each clutch is controlled by a shift valve. The shift valve activates according to the ON/OFF status of shift solenoid valves A, B, C, D, and E. Hydraulic pressure supply in D is shown above. The line pressure or the A/T clutch pressure control solenoid valve A, B, or C pressure is supplied to each clutch by the activated shift valve. The powertrain control module (PCM) computes the actual ratio of input shaft (mainshaft) and output shaft (countershaft) revolutions. If a difference between the actual ratio and the commanded gear occurs when shifting to each gear position, the PCM detects a malfunction in the shift solenoid valve or in the hydraulic system and stores a DTC.
Monitor Execution, Sequence, Duration, DTC Type, OBD Status
| Execution | Continuous |
| Sequence | None |
| Duration | 3 seconds or more (Symptom 1-A) |
| 2.5 seconds or more (Symptom 1-B) | |
| 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 |
|---|---|---|
| Vehicle speed [VEHICLE SPEED]* |
2 mph (4 km/h) | - |
| Battery voltage [BATTERY VOLTAGE] |
11 V | - |
| Throttle position** | 6 % | - |
| Shift lever position | D | |
| Shift status | 4th* | |
| 2nd → 3rd** | ||
| No active DTCs set (prevents monitor from running) | P0122, P0123, P0222, P0223, P0705, P0706, P0716, P0717, P0718, P0721, P0722, P0723, P0747, P0752, P0756, P0757, P0761, P0771, P0776, P0777, P0796, P0797, P0962, P0963, P0966, P0967, P0970, P0971, P0973, P0974, P0976, P0977, P0979, P0980, P0982, P0983, P0985, P0986, P1658, P1659, P1683, P1684, P1730, P1731, P1733, P1734, P2101, P2118, P2122, P2123, P2127, P2128, P2135, P2138, P2176 | |
*: Symptom 1-A
**: Symptom 1-B
[ ]: HDS Parameter
Malfunction Threshold
Symptom 1-B occurs after Symptom 1-A occurs.
| Symptom | Gear position commanded by the PCM | Actual gear position |
|---|---|---|
| 1-A | Driving in 4th gear | Neutral |
| 1-B | Shifting between 2nd gear and 3rd gear | Shifting between 2nd gear and 3rd gear |
Possible Cause
- Shift solenoid valve B stuck on
- Shift valve B stuck
- Shift solenoid valve C stuck on
- Shift valve C stuck
Confirmation Procedure
With the HDS
None.
With the Driving Pattern
- Start the engine.
- Drive the vehicle in D until the transmission shifts into 5th 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.