Shift Solenoid ”A” Control Circuit Low; Shift Solenoid ”A” Control Circuit High - Toyota Tundra 2005 Service - Repair - Maintenance

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CIRCUIT DESCRIPTION

Shifting from 1st to 5th is performed in combination with "ON" and "OFF" operation of the shift solenoid valves

SL1, SL2, S1, S2 and SR 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 valves to allow the vehicle to be

operated smoothly (See page DI−985).

ECM detects short in solenoid valve S1 circuit 2 times when

solenoid valve S1 is operated (1−trip detection logic)

ECM detects open in solenoid valve S1 circuit 2 times when

solenoid valve S1 is not operated (1−trip detection logic)

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 Ω or less, the ECM determines there is

a short in the shift solenoid valve S1 circuit.

When the shift solenoid valve S1 is off, if resistance is 100 kΩ or more, the ECM determines there is an open

in the shift solenoid valve S1 circuit (See page DI−985).

MONITOR STRATEGY

Related DTCs

Required sensors/Components

Frequency of operation

MIL operation

Sequence of operation

Shift Solenoid "A" Control Circuit Low

(Shift Solenoid Valve S1)

Shift Solenoid "A" Control Circuit High

(Shift Solenoid Valve S1)

DTC Detection Condition

Shift solenoid valve S1

AUTOMATIC TRANSMISSION (A750E for 1GR−FE)

S Short in shift solenoid valve S1 circuit

S Shift solenoid valve S1

S Open in shift solenoid valve S1 circuit

S Shift solenoid valve S1

Shift solenoid valve S1/Range check (Low resistance)

Shift solenoid valve S1/Range check (High resistance)

Trouble Area