Diagnostic Procedure

Perform the self-diagnosis check. Refer to "SELF-DIAGNOSTIC RESULT MODE ".

Is a malfunction in the step motor function indicated in the results? 

YES: Repair or replace damaged parts. (Check the step motor function. Refer to "DTC P1778 STEP MOTOR - FUNCTION ".)

NO: GO TO 2.

Check output speed sensor (secondary speed sensor) system and input speed sensor (primary speed sensor) system. Refer to "DTC P0720 VEHICLE SPEED SENSOR CVT (SECONDARY SPEED SENSOR) ", "DTC P0715 INPUT SPEED SENSOR CIRCUIT (PRI SPEED SENSOR) ".

OK or NG 

OK: GO TO 3.

NG: Repair or replace damaged parts.

Check engine speed signal system. Refer to "DTC P0725 ENGINE SPEED SIGNAL ".

OK or NG 

OK: GO TO 4.

NG: Repair or replace damaged parts. Refer to "IGNITION SIGNAL ".

Check the following:

• Power supply and ground circuit for TCM. Refer to "DTC P1701 TRANSMISSION CONTROL MODULE (POWER SUPPLY) ".
• The TCM pin terminals for damage or loose connection with harness connector.

OK or NG 

OK: GO TO 5.

NG: Repair or replace damaged parts.

Perform "DTC CONFIRMATION PROCEDURE ".

OK or NG 

OK: INSPECTION END 

NG: Replace TCM or transaxle assembly. Refer to "SERVICE AFTER REPLACING TCM AND TRANSAXLE ASSEMBLY ", "REMOVAL AND INSTALLATION (MR20DE) ".