DTC P0756: Shift Solenoid "B" Performance (Shift Solenoid Valve S2) [08/2017 - 08/2019]: Description
WARNING: This page is about a different variant/trim than selected.
The ECM uses signals from the output shaft speed sensor and input speed sensor to detect the actual gear position (1st, 2nd, 3rd, 4th, 5th or 6th gear
Then the ECM compares the actual gear with the shift schedule in the ECM memory to detect mechanical problems of the shift solenoid valves, valve body or automatic transmission (clutch, brake, gear, etc.
| DTC Code |
DTC Detection Condition |
Trouble Area |
| P0756 |
- S2 stuck ON malfunction*1:
Shifting to 3rd and 5th gears is impossible.
The ECM determines there is a malfunction when the following conditions are both met. (2-trip detection logic)
(a) When the ECM directs the transmission to switch to 5th gear, the actual gear is shifted to 6th.(b) When the ECM directs the transmission to switch to 6th gear, the actual gear is shifted to 6th. |
- Shift solenoid valve S2 remains closed
- Valve body is blocked
- Automatic transmission (clutch, brake, gear, etc.)
|
| P0756 |
- S2 stuck OFF malfunction*2:
The vehicle starts in 3rd gear and shifting to 6th gear is impossible.
The ECM determines there is a malfunction when the following conditions are both met. (2-trip detection logic)
(a) When the ECM directs the transmission to switch to 1st gear, the actual gear is shifted to 3rd.(b) When the ECM directs the transmission to switch to 6th gear, the actual gear is shifted to 5th. |
- Shift solenoid valve S2 remains open
- Shift solenoid valve SLT remains open or closed
- Valve body is blocked
- Automatic transmission (clutch, brake, gear, etc.)
|
HINT:
Gear positions in the event of a solenoid valve mechanical problem:
| ECM gear shift command |
1st |
2nd |
3rd |
4th |
5th |
6th |
| *1: Actual gear position under S2 stuck ON malfunction |
1st |
2nd |
2nd |
4th |
6th |
6th |
| *2: Actual gear position under S2 stuck OFF malfunction |
3rd |
3rd |
3rd |
4th |
5th |
5th |