P1890

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

- Teach-In not completed
- Malfunction of TC-SST-ECU
- Malfunction of clutch assembly

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?

YES Go to Step 2.
NO Repair the CAN bus lines. CAN Bus Diagnostics Chart.) After repairing the CAN bus line, go to Step 2.
STEP 2. Scan tool Teach-In

(1)Perform Teach-In. (Refer to TC-SST Teach-In.)

(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?

YES Replace the transaxle assembly. (Refer to Removal and Replacement.)
NO Intermittent malfunction. How to Cope With Intermittent Malfunctions.)