P1730
DTC P1730 A/T InterlockDescription
^ Fail-safe function to detect interlock conditions.
On Board Diagnosis Logic
^ This is an OBD-II self-diagnostic item.
^ Diagnostic trouble code "P1730 A/T INTERLOCK" with SDT or 12th judgement flicker without SDT is detected when TCM does not receive the proper voltage signal from the sensor and switch.
^ TCM monitors and compares gear position and conditions of each ATF pressure switch when gear is steady.
Possible Cause
^ Harness or connectors
(The solenoid and switch circuit is open or shorted.)
^ Low coast brake solenoid valve
^ ATF pressure switch 2
DTC Confirmation Procedure
NOTE:
If "DTC Confirmation Procedure" has been previously performed, always turn ignition switch "OFF" and wait at least 10 seconds before performing the next test.
After the repair, perform the following procedure to confirm the malfunction is eliminated.
WITH SDT
1. Turn ignition switch "ON". (Do not start engine.)
2. Select "Data list" mode for "AT" with SDT.
3. Start engine.
4. Drive vehicle and maintain the following conditions for at least 2 consecutive seconds.
SLCT LVR POSI: "D" position
5. If DTC is detected, go to [DTC P1730 A/T Interlock].
WITH GST
Follow the procedure "WITH SDT".
Judgement of A/T Interlock
When A/T Interlock is judged to be malfunctioning, the vehicle should be fixed in 2nd gear, and should be set in a condition in which it can travel.
When one of the following fastening patterns is detected, the fail-safe function in correspondence with the individual pattern should be performed.
NOTE:
When the vehicle is driven in 2nd gear, a turbine revolution sensor malfunction is displayed, but this is not a turbine revolution sensor malfunction.
When interlock is detected at the 3rd gear or more, it is locked at the 2nd gear.
Diagnosis Procedure
Steps 1-4:
