K121 CVT  CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM  VEHICLE CONTROL HISTORY (RoB)  

Connect the GTS to the DLC3.

Turn the ignition switch to ON.

Turn the GTS on.

Enter the following menus: Powertrain / Engine / Utility / Vehicle Control History (RoB).

Powertrain > Engine > Utility

Tester Display
Vehicle Control History (RoB)

50005 372 55

Code	Tester Display	Measurement Item	Diagnostic Note
*: If the engine stalls 3 times or more, the ECM suspects that the shift solenoid valve SLU is stuck on. In this case, the ECM releases the lock-up oil pressure when the engine is next started as engine stall avoidance control. In this case, the variable gear ratio range and output torque will be restricted. If the shift solenoid valve SLU is not malfunctioning, engine stall avoidance control can be canceled by performing either of the following procedures: - Drive the vehicle at 40 km/h (25 mph) or more for 5 seconds or more and then stop the vehicle. - Using the GTS, clear the DTCs for the ECU (even if no DTCs are stored, perform the clear operation). If the vehicle is attempted to be stopped when the shift solenoid valve SLU is malfunctioning or when engine stall avoidance control has not been canceled, engine stall avoidance control will be performed to prevent another engine stall. In this case, the variable gear ratio range and output torque will be restricted.
X0505	Shift Operation during Accelerator & Brake Depress	History of attempts to change the shift lever to P with the accelerator and brake pedals depressed when the engine is running	If this history remains, perform a shift lock operation inspection as a shift lock control ECU malfunction is suspected. (202304,999999,_52,_138176,_0579406,RM1000000029ENN,)
X050B	Shift N Change by Busy Shift	History of shift state being changed to N due to shift lever being repeatedly moved to R, D and/or N within a short period of time	Wait for a while and then attempt to change the shift state again
X0510	Shifted out of P Position without Depressing Brake Pedal	History of attempts to change the shift lever to P with the brake pedal not depressed	If this history remains, perform a shift lock operation inspection as a shift lock control ECU malfunction is suspected. (202304,999999,_52,_138176,_0579406,RM1000000029ENN,)
X053A	Shift Position Uncertain	Shift position cannot be determined	If this history remains, perform a shift lever position inspection as the shift lever position may have been held in an unspecified position. (202304,999999,_52,_138176,_0579406,RM1000000029ENN,)
X054C	Accelerator Depress when Shift P Position during Engine/Ready ON	History of accelerator pedal being depressed when the shift lever is in P and the engine is running	Countermeasures: Make sure the accelerator pedal is not depressed when changing the shift lever from P.
X0556	Shifted out of P Position during Cranking	History of attempts to change the shift lever to P while the engine cranking	If this history remains, perform a shift lock operation inspection as a shift lock control ECU malfunction is suspected. (202304,999999,_52,_138176,_0579406,RM1000000029ENN,)
X090C	High A/T Oil Temperature	History of the CVT fluid temperature exceeding the threshold and a warning being output after starting the engine (A shift pattern which prioritizes lower engine speed gear shift is used until the CVT fluid temperature drops, in order to protect the continuously variable transaxle assembly)	-
X090D	Engine Stall Prevention Fail Safe History (A/T)	Suspected transmission malfunction. History of engine stall occurring in D, M or R.	*

Connect the GTS to the DLC3.

Turn the ignition switch to ON.

Turn the GTS on.

Enter the following menus: Powertrain / Engine / Utility / Vehicle Control History (RoB) (Clear).

Powertrain > Engine > Utility

Tester Display
Vehicle Control History (RoB)

50005 372 55

NOTICE:

By performing this procedure, all stored Vehicle Control History will be cleared.

Connect the GTS to the DLC3.

Turn the ignition switch to ON.

Turn the GTS on.

Enter the following menus: Powertrain / Engine / Utility / Vehicle Control History (RoB).

Powertrain > Engine > Utility

Tester Display
Vehicle Control History (RoB)

50005 372 55

Select a Vehicle Control History item to display its freeze frame data.