Dtc P Pressure Control Solenoid B Electrical Shift Solenoid Valve Sl

description

Shifting from 1st to 5th is performed in combination with the ON and OFF operation of the shift solenoid valves SL1, SL2, S1, S2 and SR, which is controlled by the ECM. If an open or short circuit occurs in the shift solenoid valves, the ECM controls the remaining normal shift solenoid valves to allow the vehicle to be operated safely (See DIAGNOSIS SYSTEM ).

DTC D

ETECTION CONDITION AND TROUBLE AREA REFERENCE

DTC No.

DTC Detection Condition

Trouble Area

P0778

The ECM checks for an open or short in the shift solenoid valve SL2 circuit while driving and shifting gears. (1-trip detection logic)

SL2 output signal duty is less than 100 % under normal condition.

• Open or short in shift solenoid valve SL2 circuit

• Shift solenoid valve SL2

• ECM

monitor description

This DTC indicates an open or short in the shift solenoid valve SL2 circuit. The ECM commands gear shifts by turning the shift solenoid valves ON/OFF. When there is an open or short circuit in any shift solenoid valve circuit, the ECM detects the problem, illuminates the MIL and stores the DTC. Also, the ECM performs the fail-safe function and turns the other normal shift solenoid valves ON/OFF. In case of an open or short circuit, the ECM stops sending current to the circuit.

While driving and shifting between 4th and 5th gears, if the ECM detects an open or short in the shift solenoid valve SL2 circuit, the ECM determines that there is a malfunction (See DIAGNOSIS SYSTEM ).

monitor strategy

2006 TRANSMISSION A750F Automatic Transaxle - Sequoia

MONITOR STRATEGY REFERENCE

Related DTCs

P0778: Shift solenoid valve SL2/Range check

Required sensors/Components

Shift solenoid valve SL2

Frequency of operation

Continuous

Duration

1 second

MIL operation

Immediate

Sequence of operation

None

typical enabling conditions

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