5AT RE5R05A

P1730 INTERLOCK





Description
Fail-safe function to detect interlock conditions.




On Board Diagnosis Logic
- This is an OBD-II self-diagnostic item.
- Diagnostic trouble code "P1730" with CONSULT-III or 12th judgment flicker without CONSULT-III 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
(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 CONSULT-III
1. Start the engine.
2. Select "DATA MONITOR" in "TRANSMISSION".
3. Drive vehicle and maintain the following conditions for at least 2 consecutive seconds.

SLCT L/R POSI : "D" position

4. If DTC is detected, go to 5AT RE5R05A.

WITH GST
Follow the procedure "WITH CONSULT-III".




Judgment of Interlock
When interlock is judged to be malfunctioning, the vehicle should be fixed in 2GR, and should be set in a condition in which it can travel.

NOTE:
When the vehicle is driven fixed in 2GR, a input speed sensor malfunction is displayed, but this is not a input speed sensor malfunction.
When interlock is detected at the 3GR or more, it is locked at the 2GR.




Diagnosis Procedure
1.CHECK SELF-DIAGNOSTIC RESULTS
With CONSULT-III
1. Drive vehicle.
2. Stop vehicle and turn ignition switch OFF.
3. Turn ignition switch ON.
4. Select "SELF-DIAG RESULTS" in "TRANSMISSION".
Without CONSULT-III
1. Drive vehicle.
2. Stop vehicle and turn ignition switch OFF.
3. Turn ignition switch ON.
4. Perform self-diagnosis. Refer to Reading and Clearing Diagnostic Trouble Codes.
OK or NG
OK - GO TO 2.
NG - Check low coast brake solenoid valve circuit and function. Refer to P1772 P1772 P1772 P1772 P1772 P1772, P1774 P1774 P1774 P1774 P1774.
2.CHECK DTC
Perform 5AT RE5R05A.
OK or NG
OK INSPECTION END
NG - GO TO 3.
3.CHECK TCM POWER SUPPLY AND GROUND CIRCUIT
Check TCM power supply and ground circuit. Refer to Main Power Supply and Ground Circuit.
OK or NG
OK - GO TO 4.
NG - Repair or replace damaged parts.
4.DETECT MALFUNCTIONING ITEM
Check A/T assembly harness connector pin terminals for damage or loose connection with harness connector.
OK or NG
OK - Replace the control valve with TCM. Refer to Service and Repair.
NG - Repair or replace damaged parts.