DTC P0976
DTC P0976: Shift Solenoid Valve B (Short)
General Description
Shift solenoid valve driving signal combination table
| Gear Position | Shift solenoid valve A | Shift solenoid valve B | Shift solenoid valve C | Shift solenoid valve D | Shift solenoid valve E |
| Park | ON | ON | OFF | OFF | OFF |
| Reverse | ON | ON | ON | OFF | ON |
| Neutral | ON | ON | OFF | OFF | OFF |
| 1st | OFF | OFF (ON)* | ON | OFF | OFF |
| 2nd | OFF (ON)* | OFF | OFF | OFF | OFF |
| 3rd | OFF | OFF (ON)* | ON | OFF | OFF |
| 4th | OFF (ON)* | OFF | OFF | OFF | OFF |
| 5th | OFF | OFF (ON)* | ON | OFF | OFF |
| 6th | OFF (ON)* | OFF | OFF | OFF | OFF |
| 7th | OFF | OFF (ON)* | ON | OFF | OFF |
| 8th | OFF (ON)* | OFF | OFF | OFF | OFF |
*: OFF during torque converter clutch operation
When shift solenoid valves A, B, C, D, and E are turned ON/OFF, the hydraulic pressure circuit opens/closes. The hydraulic pressure circuit supplies/discharges hydraulic pressure to/from each clutch and each piston according to the combination of the ON/OFF status of the shift solenoid valves. The powertrain control module (PCM) commands the driver circuit to turn on the shift solenoid valve. The circuit detects malfunctions such as a circuit short or open, and sends back a return signal during the PCM's command. When the return signal does not match the PCM command to turn ON the shift solenoid valve, the PCM detects a malfunction and stores a DTC.
Monitor Execution, Sequence, Duration, DTC Type, OBD Status
| Execution | Continuous |
| Sequence | None |
| Duration | 1 second or more |
| DTC Type | One drive cycle, MIL on, A/T gear position indicator blinks |
| OBD Status | PASSED/FAILED/NOT COMPLETED (STILL TESTING) |
Enable Conditions
| Condition | Minimum | Maximum |
|---|---|---|
| Battery voltage [Battery Voltage] |
11 V | - |
| No active DTCs set (prevents monitor from running) | P0977, P0979, P0980, P0985, P0986 | |
[ ]: HDS Parameter
Malfunction Threshold
The return signal does not match the command to turn ON shift solenoid valve B for at least 1 second.
Possible Cause
- Shift solenoid valve B SHB line short to ground
- Shift solenoid valve B internal circuit short
- PCM internal circuit failure
Confirmation Procedure
With the HDS
None.
With the Driving Pattern
- Start the engine.
- Shift to P position/mode, and wait for at least 1 second.
Diagnosis Details
Conditions for setting the DTC
When a malfunction is detected, the MIL comes on and a Pending DTC, a Confirmed DTC, and the freeze data are stored in the PCM memory.
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.