P0982

DTC P0982 Shift Solenoid "D" Control Circuit Low

CIRCUIT DESCRIPTION

DTC Detection Condition:

Shifting from L to O/D is performed in combination with ON and OFF operation of the shift solenoid valves SL1 and SL2 which is 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 operated smoothly (Fail safe function).

Fail safe function:




If either of the shift solenoid valve circuits develops an open or short, the ECM turns the other shift solenoid ON and OFF in order to shift into the gear positions shown in the table. The ECM also turns the shift solenoid valve SL OFF at the same time. If both solenoids malfunction, hydraulic control cannot be performed electronically, and so it must be done manually.

Manual shifting as shown in the table must be done (In case of a short circuit, the ECM stops sending the current to the short circuit solenoid).

MONITOR DESCRIPTION

Monitor Strategy:

Typical Enabling Conditions:

Typical Malfunction Thresholds:

The ECM commands transmission gear shifts by turning the shift solenoid valves ON and OFF. If the ECM detects an open or short circuit in any shift solenoid valve, it will illuminate the MIL and a DTC is set. At this time, the ECM will enter fail safe mode. The ECM will stop sending command signal(s) to the malfunctioning solenoid but continue to operate the other solenoid valves to provide partial transmission operation.

Wiring Diagram:

Step 1:

Step 2 - 3:

INSPECTION PROCEDURE

CHECK FOR INTERMITTENT PROBLEMS

Hand-held tester only:
Inspect the vehicle's ECM using check mode. Intermittent problems are easier to detect when the ECM is in check mode with the hand-held tester. In check mode, the ECM uses 1 trip detection logic, which has a higher sensitivity to malfunctions than normal mode (default), which uses 2 trip detection logic.

a. Clear the DTCs.
b. Set the check mode.
c. Perform a simulation test.
d. Check the connector and terminal .
e. Wiggle the harness and connector.