Toyota Celica 2005, Руководство по ремонту

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− DIAGNOSTICS AUTOMATIC TRANSAXLE (U341E)
DI − 809
2005 CELICA (RM1131U)
DTC P0743 Torque Converter Clutch Circuit Electrical
(Shift Solenoid Valve SL)
CIRCUIT DESCRIPTION
The shift solenoid valve SL is turned ON and OFF by signals from the ECM to control the hydraulic pressure
acting on the lock
− up relay valve, which then controls operation of the lock − up clutch.
Fail safe function:
If the ECM detects a malfunction, it turns the shift solenoid valve SL OFF.
DTC No. DTC Detecting Condition Trouble Area
P0743
Either (a) or (b) is detected for 1 time.
(2
− trip detection logic)
(a) Solenoid resistance is 8 Ω or less when solenoid is ener-
gized.
(b) Solenoid resistance is 100
k Ω or more when solenoid is not
energized.
S Open or short in shift solenoid valve SL circuit
S Shift solenoid valve SL
S
ECM
MONITOR DESCRIPTION
Based on the signals from the Throttle Position Sensor, the Airflow Meter and the Crankshaft Position Sen-
sor, the ECM sends a signal to the SL Solenoid Valve to regulate the hydraulic pressure and provide smooth-
er gearshifts. The shift
− solenoid valve SL responds to commands from the ECM. The valve controls the
look − up relay valve to perform the torque − converter lock − up function. If the ECM detects an open or short
circuit for shift − solenoid SL, it will illuminate the MIL and store the DTC.
MONITOR STRATEGY
Related DTCs P0743
Shift solenoid valve SL/Range check (Low resistance)
Shift solenoid valve SL/Range check (High resistance)
Required sensors/Components Shift solenoid valve SL
Frequency of operation Continuous
Duration 0.032 sec.
MIL operation 2 driving cycles
Sequence of operation None
TYPICAL ENABLING CONDITIONS
Item
Specification
Minimum Maximum
The monitor will run whenever this DTC is
not present.
See page DI − 758
The typical enabling condition is not avail-
able.
−
DIAJD − 03
1009