P0973

DTC P0973 Shift Solenoid "A" Control Circuit Low (Shift Solenoid Valve S1)

DTC P0974 Shift Solenoid "A" Control Circuit High (Shift Solenoid Valve S1)

DESCRIPTION
Shifting from 1stto 5th is performed in combination with the ON and OFF operation of the shift solenoid valves S1, S2, SR, SL1 and SL2 which are controlled by the ECM. If an open or short circuit occurs in any of the shift solenoid valves, the ECM controls the remaining normal shift solenoid valve to allow the vehicle to be driven smoothly.





MONITOR DESCRIPTION
These DTCs indicate an open or short in the shift solenoid valve S1 circuit. When there is an open or short circuit in any shift solenoid valve circuits, the ECM detects the problem and illuminates the MIL and stores the DTC. When the shift solenoid valve S1 is on, if the resistance is 8 Ohms or less, the ECM determines that there is a short malfunction in the shift solenoid valve S1 circuit.
When the shift solenoid valve S1 is off, if the resistance is 100 kOhms or more, the ECM determines that the shift solenoid valve S1 circuit is open.

MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS





TYPICAL MALFUNCTION THRESHOLDS

Part 1:

Part 2:

COMPONENT OPERATING RANGE

WIRING DIAGRAM:

INSPECTION PROCEDURE

HINT: The shift solenoid valve S1 is turned on/off normally when the shift lever is in the D position:

Step 1 (Part 1):

Step 1 (Part 2), Steps 2-3: