Dtc P Shift Solenoid A Control Circuit Low Shift Solenoid Valve S Dtc P Shift Solenoid A Control Circuit High Shift Solenoid Valve Si

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 DATA LIST / ACTIVE TEST ).

2006 TRANSMISSION A750E Automatic Transaxle - Sequoia

DTC DETECTION CONDITION

DTC No.

DTC Detection Condition

Trouble Area

P0973

ECM detects short in solenoid valve S1 circuit 2 times when solenoid valve S1 is operated. (1 trip detection logic)

• Short in shift solenoid valve S1 circuit

• Shift solenoid valve S1

• ECM

P0974

ECM detects open in solenoid valve S1 circuit 2 times when solenoid valve S1 is not operated. (1 trip detection logic)

• Open in shift solenoid valve S1 circuit

• Shift solenoid valve S1

• ECM

monitor description 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 circuit, the ECM detects the problem and illuminates the MIL and stores the DTC. When the shift solenoid valve S1 is ON, if resistance is 8 ohms or less, the ECM determines that there is a short in the shift solenoid valve S1 circuit.

When the shift solenoid valve S1 is OFF, if resistance is 100 kohms or more, the ECM determines that there is an open in the shift solenoid valve S1 circuit (See DATA LIST / ACTIVE TEST ).

monitor strategy

MONITOR STRATEGY

Related DTCs

P0973: Shift solenoid valve S1/Range check (Low resistance) P0974: Shift solenoid valve S1/Range check (High resistance)

Required sensors/Components

Shift solenoid valve S1

Frequency of operation

Continuous

Duration

0.128 seconds or more

MIL operation

Immediate

Sequence of operation

None

typical enabling conditions typical enabling conditions

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