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DTC P1890 TEACH-IN NOT COMPLETED


caution
  • If there is any problem in the CAN bus lines, an incorrect diagnostic trouble code may be set. Prior to this diagnosis, diagnose the CAN bus lines.
  • Whenever the ECU is replaced, ensure that the CAN bus lines are normal.

DIAGNOSTIC FUNCTION


TC-SST-ECU checks that Teach-In is completed normally.

DESCRIPTIONS OF MONITOR METHODS


It is judged that Teach-In is not completed normally.

PROBABLE CAUSES



DIAGNOSTIC PROCEDURE
Required Special Tools:
  • MB991958 Scan Tool (M.U.T.-III Sub Assembly)

    • MB991824: Vehicle Communication Interface (V.C.I.)
    • MB991827 M.U.T.-III USB Cable
    • MB991910 M.U.T.-III Main Harness A

STEP 1. Scan tool CAN bus diagnostics
Using scan tool MB991958, diagnose the CAN bus lines.

Q. Is the check result normal?
Go to Step 2.
Repair the CAN bus lines. (Refer to GROUP 54C - Troubleshooting .) After repairing the CAN bus line, go to Step 2.

STEP 2. Scan tool Teach-In
(1)Perform Teach-In. (Refer to .)
(2)After 10 or more seconds have passed with the ignition switch ON position, check that the DTC is reset.

Q. Is DTC No.P1890 set?
Replace the transaxle assembly. (Refer to .)
Intermittent malfunction. (Refer to GROUP 00 - How to Cope with Intermittent Malfunction .)