Toyota Celica 2005 Repair Manual page 931

DI−730
MONITOR DESCRIPTION
The ECM commands gearshift 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 and illuminates the MIL and stores
the DTC. And the ECM performs the fail−safe function and turns the other shift solenoid valves in good condi-
tion "ON/OFF" (In case of an open or short circuit, the ECM stops sending current to the circuit.).
MONITOR STRATEGY
P0748, P0778
Related DTCs
Required sensors/Components
Frequency of operation
Duration
MIL operation
Sequence of operation
P0982, P0983
Related DTCs
Required sensors/Components
Frequency of operation
Duration
MIL operation
Sequence of operation
TYPICAL ENABLING CONDITIONS
P0748, P0778
Item
The monitor will run whenever these
DTCs are not present.
Solenoid current cut status
Battery voltage
CPU commanded duty
Ignition switch
Starter
2005 CELICA (RM1131U)
DIAGNOSTICS
P0748
P0778
P0748: Shift solenoid valve SL1
P0778: Shift solenoid valve SL2
Continuous
1 sec.
Immediate
None
P0982
P0983
Shift solenoid valve S4
Continuous
0.064 sec.
Immediate
None
Minimum
11 V or more
19 % or more
− AUTOMATIC TRANSAXLE (U240E)
Shift solenoid valve SL1/Range check
Shift solenoid valve SL2/Range check
Shift solenoid valve S4/Range check (Low resistance)
Shift solenoid valve S4/Range check (High resistance)
Specification
See page DI−669
Not cut
ON
OFF
930
Maximum
−
−