P0977

DTC P0976 Shift Solenoid "B" Control Circuit Low (Shift Solenoid Valve S2)

DTC P0977 Shift Solenoid "B" Control Circuit High (Shift Solenoid Valve S2)

DESCRIPTION
Shifting from 1st to 4th is performed in combination with the ON and OFF operations of shift solenoid valves S1 and S2 which are controlled by the ECM. If an open or short circuit occurs in either of the shift solenoid valves, the ECM controls the remaining normal shift solenoid valve to allow the vehicle to be driven smoothly.

(If an open or short circuit occurs, the ECM stops sending currents to the affected circuit.).





MONITOR DESCRIPTION
The ECM commands gearshift by turning the shift solenoid valves ON/OFF. When there is an open or short circuit in the shift solenoid valve S2 circuit, the ECM detects the problem and the MIL comes on. Illuminating the MIL, the ECM performs the fail-safe and turns the other functioning shift solenoid valve ON/OFF.

(If an open or short circuit occurs, the ECM stops sending currents to the affected circuit.)

MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS





TYPICAL MALFUNCTION THRESHOLDS





COMPONENT OPERATING RANGE

WIRING DIAGRAM:

INSPECTION PROCEDURE

HINT: Shift solenoid valve S2 is turned on/off normally when the shift lever is in the D position:

Steps 1-2:

Step 3: