Specifications

AISIN AUTOMATIC TRANSAXLE 5A2 – 69
DAEWOO V–121 BL4
DIAGNOSTIC TROUBLE CODE (DTC) P0743
TORQUE CONVERTER CLUTCH (TCC) ELECTRICAL
Conditions for Setting the DTC
S TCM detects that the ON signal of the lockup sole-
noid monitor during 0.5 seconds when lockup sole-
noid driver outputs the OFF signal.(When the TCC
circuit is open or short to battery).
S The above detection 2 times at shifting continuous-
ly.(When the Tcc circuit is open or short to battery).
S TCM detects that the OFF signal of the lockup sole-
noid monitor during 0.3 seconds when lockup sole-
noid driver outputs the ON signal.(When the TCC
circuit is short to ground).
S The above detection 1 time at shifting continuous-
ly.(When the TCC circuit is short to ground).
Action Taken When the DTC Sets
S TCM will request the illumination of MIL and store
DTC when TCM detects failures on two consecu-
tive ignition cycles.
S No TCC lockup solenoid
S 1st gear fixed under the 10km/h
Conditions for Clearing the DTC
S The TCM turns off the MIL when no further failures
detected for three consecutive ignition cycles.
S The scan tool can clear the DTC from the TCM his-
tory.
S The TCM clears the DTC from the TCM history
memory after forty consecutive warm up cycles
without fault.
S TCM detects the ON signal of the lockup solenoid
monitor during 160 ms when lockup solenoid driver
outputs the ON signal and TCM detects the OFF
signal of the lockup solenoid monitor during 160 ms
when lockup solenoid driver outputs the OFF sig-
nal.
Cause of Failure
S Wiring harness or connector between lockup sole-
noid and TCM
S Lockup solenoid
S TCM