DTC P0973, P0974: Shift Solenoid "A" Control Circuit Low, Shift Solenoid "A" Control Circuit High: Notes
Circuit description
Signals from the transmission control computer ASSY change the vehicle speed from 1st to 6th gear according to the combination of the transmission 3 way solenoid ASSY (S1, S2, S3, S4, SR) and the clutch control solenoid No. 1 (SL1, SL2). When there is an open or short circuit in the solenoid valve system, the transmission control computer ASSY stops continuity to all solenoids as the fail safe function. As a result, only the mechanical hydraulic circuit is available and the manual shift control is initiated.
| DTC No. SAE/TCCS | DTC detecting condition
|
Inspection parts |
|---|---|---|
| P0973 |
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| P0974 |
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Monitor description
These diagnostic codes indicate open or short circuit in the transmission 3 way solenoid ASSY (S1) circuit. If there is open or short circuit in any of the shift solenoid valve circuits, TCM detects the defect, turns on MIL, and records the diagnostic code.
| Applicable diagnostic codes | P0973: Shift Solenoid "A" Control Circuit Low P0974: Shift Solenoid "A" Control Circuit High |
| Required sensor/component | Transmission 3 way solenoid ASSY (S1) |
| Operation frequency | Consecutive |
| Period | 0.5 seconds |
| MIL operation | Immediate |
| Operation order | None |
| Battery voltage | 10.2 V or more |
| Above condition is established | 2 seconds or more |
| Fail safe mode (solenoid power supply shut down) | Non-active |
TYPICAL MALFUNCTION THRESHOLDS
| Output monitor status when TCM outputs ON signal | OFF |
| Output monitor status when TCM outputs OFF signal | ON |