P0976

DTC P0976 SHIFT SOLENOID "B" CONTROL CIRCUIT LOW (SHIFT SOLENOID VALVE S2)

CIRCUIT DESCRIPTION

DTC Detection Conditions:

Shifting from 1st to 4th is performed in combination with the ON and OFF operation of the shift solenoid valves No.1 and No.2 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. (In case of an open or short circuit, the ECM stops sending current to the circuit.)

Fail-safe functions
If either of the shift solenoid valve circuits has an open or short failure, the ECM turns the other shift solenoid "ON" and "OFF" in order to shift into the gear positions shown in the table.
When a short circuit occurs, the ECM cuts the supply of current to the short circuited solenoid.
Even if starting the engine again in fail-safe mode, the gear position remains in the same position.

MONITOR DESCRIPTION

Monitor Strategy:

Typical Enabling Conditions:

Typical Malfunction Thresholds:

Component Operating Range:

The ECM controls the gearshift by turning the shift solenoid valves "ON/OFF". When there is an open or short circuit in either shift solenoid valve circuit, the ECM detects the problem and illuminates the MIL and stores a DTC. And the ECM performs the fail-safe function and turns the other shift solenoid valves in good condition "ON/OFF". (In case of an open or short circuit, the ECM stops sending current to the circuit.)

Wiring Diagram:

Step 1:

Step 2 - 3:

INSPECTION PROCEDURE

HINT: The shift solenoid valve S1 or S2 is turned on/off normally when the shift lever is in the D position: