Code No. P0893: Interlock Detection


DIAGNOSIS CODE SET CONDITIONS
  • With the stop lamp switch signal and output shaft speed sensor being normal, the fast deceleration exceeding the set time is detected.
  • Output failure to the solenoid, open or short circuit
  • Hydraulic switch pattern, hydraulic switch open or short circuit
  • Open circuit of the output shaft speed sensor or poor connection of the connector

PROBABLE CAUSES



  • Malfunction of the P0720: output shaft speed sensor system circuit
  • Damaged harness or connector
  • Malfunction of the P0743: lock-up and low-reverse brake linear solenoid valve system circuit
  • Malfunction of the P0753: low clutch linear solenoid valve system circuit
  • Malfunction of the P0758: 2-6 brake linear solenoid valve system circuit
  • Malfunction of the P0763: 3-5 reverse clutch linear solenoid valve system circuit
  • Malfunction of the P0768: high clutch linear solenoid valve system circuit
  • Malfunction of the P1753: low clutch shift solenoid valve system circuit
  • Malfunction of the P1758: low-reverse brake shift solenoid valve system circuit
  • Malfunction of the P0841: low clutch pressure switch system circuit
  • Malfunction of the P0846: 2-6 brake pressure switch system circuit
  • Malfunction of the P0871: 3-5 reverse clutch pressure switch system circuit
  • Malfunction of the P0876: high clutch pressure switch system circuit
  • Malfunction of the P0988: low-reverse brake pressure switch system circuit

DIAGNOSIS PROCEDURE

STEP 1. Check the diagnosis code.
Check if the following diagnosis codes are set.

  • P0720 output shaft speed sensor
  • P0743 lock-up and low-reverse brake linear solenoid valve
  • P0753 low clutch linear solenoid valve
  • P0758 2-6 brake linear solenoid valve
  • P0763 3-5 reverse clutch linear solenoid valve
  • P0768 high clutch linear solenoid valve
  • P1753 low clutch shift solenoid valve
  • P1758 low-reverse brake shift solenoid valve
  • P0841 low clutch pressure switch
  • P0846 2-6 brake pressure switch
  • P0871 3-5 reverse clutch pressure switch
  • P0876 high clutch pressure switch
  • P0988 low-reverse brake pressure switch

Q. Is the check result normal?
Go to Step 2.
Repair or replace the failure section.

STEP 2. Check A/T-ECU related to the solenoid, pressure switch and output shaft speed sensor, the A/T control solenoid valve assembly connector pin terminals, and the connection status.


Q. Is the check result normal?
Replace the A/T-ECU, and then go to Step 3.
Repair or replace the failure section.

STEP 3. Erase the diagnosis code, and drive the vehicle for a while.
Check that the normal code is displayed.

Q. Is the check result normal?
The procedure is complete.
Replace the transmission assembly.