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DI-1073
DIAGNOSTICS - AUTOMATIC TRANSMISSION (A750E for 1GR-FE)
DIDVO-01
DTC P2714 Pressure Control Solenoid "D" Performance
(Shift Solenoid Valve SLT)
SYSTEM DESCRIPTION
The linear solenoid valve (SLT) controls the transmission line
pressure for smooth transmission operation based on signals
Line Pressure from the throttle position sensor and the vehicle speed sensor.
Control Pressure
The ECM adjusts the duty cycle of the SLT solenoid valve to
control hydraulic line pressure coming from the primary regula-
tor valve. Appropriate line pressure assures smooth shifting
with varying engine outputs.
Current Flow to Solenoid D14171 (*): Duty Ratio
The duty ratio is the ratio of the period of continuity in one cycle.
For example, if A is the period of continuity in one cycle, and B
is the period of non-continuity, then
ON Duty Ratio = A/(A + B) x 100 (%)
OFF
1 cycle
D14172
D14173
DTC No. DTC Detection Condition Trouble Area
ECM detects a malfunction on SLT (ON side) according to the S Shift solenoid valve SLT remains open or closed
P2714 revolution difference of the turbine and the output shaft, and S Valve body is blocked
also by the oil pressure. (2-trip detection logic) S Automatic transmission (clutch, brake or gear, etc.)
MONITOR DESCRIPTION
The ECM calculates the amount of heat absorbed by the friction material based on the difference in revolu-
tion (clutch slippage) between the turbine and output shaft. The ECM turns on the MIL and outputs this DTC
when the amount of heat absorption exceeds the specified value.
When the shift solenoid valve SLT remains on, oil pressure goes down and clutch engagement force de-
creases.
NOTE: If you continue driving under these conditions, the clutch will burn out and the vehicle will no longer
be drivable.
DI-1074
DIAGNOSTICS - AUTOMATIC TRANSMISSION (A750E for 1GR-FE)
MONITOR STRATEGY
Related DTCs P2714 Shift solenoid valve SLT/ON malfunction
Main Shift solenoid valve SLT
Required sensors/Components Valve body, ATF temperature sensor, Speed sensor (NT), Speed sensor
Sub
(NO)
Frequency of operation Continuous
Duration Immediate
MIL operation 2 driving cycles
Sequence of operation None
TYPICAL ENABLING CONDITIONS
Specification
Item
It
Minimum Maximum
All:
Turbine speed sensor circuit Not circuit malfunction
Output speed sensor circuit Not circuit malfunction
Transmission Fluid Temperature Sensor
Not circuit malfunction
circuit
Shift solenoid valve S1 circuit Not circuit malfunction
Shift solenoid valve S2 circuit Not circuit malfunction
Shift solenoid valve SR circuit Not circuit malfunction
Shift solenoid valve SL1 circuit Not circuit malfunction
Shift solenoid valve SL2 circuit Not circuit malfunction
Shift solenoid valve SLT circuit Not circuit malfunction
ECT (Engine coolant temperature) sensor
Not circuit malfunction
circuit
KCS sensor circuit Not circuit malfunction
ETCS (Electric throttle control system) Not system down
Transmission range "D"
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