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Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
AR:DTC P1799 INTERLOCK
DTC DETECTING CONDITION:
Perform the interlock judgment when the oil pressure switch pattern detects the specified interlock patterns
other than shifting.
TROUBLE SYMPTOM:
Locked to 2nd, 4th or 5th gear depending on the vehicle condition at the time of diagnosis.
Step
1
CHECK DTC OF TCM.
2
CHECK DTC P0756, P0766.
3
DRIVING CHECK.
1) Turn the ignition switch to OFF.
2) Perform the inspection mode.
Check
Is any of the DTC P0751,
P0756, P0761, P0766, P0771
displayed at the same time
with P1799?
Perform the diagnosis accord-
ing to DTC P0756, P0766. Is
any malfunction detected?
Is DTC displayed?
5AT(diag)-124
Yes
Perform the diag-
Go to step 2.
nosis according to
DTC.
Perform the diag-
Go to step 3.
nosis according to
DTC.
Replace the trans-
Temporary poor
mission assembly.
contact occurs.
Check that the
harness connec-
tor has no faulty.
No
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