Vehicle Control History [08/2020 - 08/2021]

• Vehicle Control History is a function that captures and stores ECU data when triggered by specific vehicle behavior.
• If the customer states that the engine stalled or will not start, it may be possible to diagnose the cause of the malfunction by checking the vehicle history information and Freeze Frame Data.
• The number of possible stored Freeze Frame Data sets, whether multi Freeze Frame Data is available, the number of freeze frame points, Freeze Frame Data items, the ECU internal range, etc., is different depending on the stored group.
• The stored data items for Vehicle Control History Freeze Frame Data are different depending on the stored group. When the value of a data item does not change across all points, only the value of the detection point will be displayed. The contents of the Freeze Frame Data is almost the same as that of the Data List.

  Refer to DATA LIST / ACTIVE TEST [08/2020 - 08/2021]

• As Vehicle Control History may be overwritten whenever the trigger conditions are met, make sure to save Vehicle Control History before performing any inspections.
• As Vehicle Control History may be stored when performing an Active Test, learning, etc., make sure to clear the Vehicle Control History before returning the vehicle to the customer.

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine / Utility / Vehicle Control History (RoB).

   Powertrain > Engine > Utility 

   Tester Display
   Vehicle Control History (RoB)

   HINT: 

   It is also possible to display Vehicle Control History during the Health Check, if "Store All Data" is selected.

   VEHICLE CONTROL HISTORY ITEM
   
   

   Code	Item	Trigger Description	Stored Group	Reference Inspection Procedure	Link
   X0800	Engine Stall	Detection Condition (Engine Stall)  Prerequisite Conditions: The engine is running (after engine is judged to be difficult to start) Detection Conditions: The engine speed is decreases to 200 rpm or less, or stops Duration: 0.5 seconds or more	08	Flow chart [Engine Stalls] step 3	Refer to Engine Stalls [08/2020 - 08/2021]
   		The engine stalled due to factors other than the operation of the engine switch
   X0803	Engine Stall (Compression Leakage)	It is judged that the engine stalled due to compression leakage	08	Flow chart [Engine Stalls] step 3	Refer to Engine Stalls [08/2020 - 08/2021]
   X0810	Engine Difficult to Start (Engine Starting Time Long)	Detection Condition (Engine Starting Time Long)  Prerequisite Conditions: STA signal is ON Detection Conditions: The engine speed is less than 500 rpm for a long period of time (the starting time is long or the engine does not start) Duration: Refer to Engine Difficult to Start Duration Judgment Region illustration	09	Flow chart [Engine Difficult to Start] step 3	Refer to Engine Difficult to Start [08/2020 - 08/2021]
   		The engine speed decreases or the engine stalls immediately after starting
   X0811	Engine Difficult to Start (Engine Stall Immediately After Starting)	Detection Condition (Engine Stall Immediately After Starting)  Prerequisite Conditions: Within 2 seconds after the engine has started (engine speed is 500 rpm or more) and the engine coolant temperature is -15°C (5°F) or more Detection Conditions: The engine speed decreases to 200 rpm or less (immediately after starting, the engine speed decreases or the engine stalls) Duration: -	09	Flow chart [Engine Difficult to Start] step 3	Refer to Engine Difficult to Start [08/2020 - 08/2021]
   		The engine speed decreases or the engine stalls immediately after starting
   X0812	Engine Difficult to Start (Immobiliser)	Engine difficult to start due to immobiliser	09	Flow chart [Engine Difficult to Start] step 3	Refer to Engine Difficult to Start [08/2020 - 08/2021]
   X0821	Rough Idle #1	Detection Condition (Rough Idle)  Prerequisite Conditions: The engine is idling with the vehicle is stopped and the accelerator pedal is fully released Detection Conditions: It is judged that combustion is unstable due to the instantaneous change in engine speed for each cylinder Duration: Depending on the combustion status, between 2 and 10 seconds	03	Flow chart [Rough Idling] step 3	Refer to Rough Idling [08/2020 - ]
   		Idling is rough due to unstable combustion in the No. 1 cylinder
   X0822	Rough Idle #2	Idling is rough due to unstable combustion in the No. 2 cylinder	03	Flow chart [Rough Idling] step 3	Refer to Rough Idling [08/2020 - ]
   X0823	Rough Idle #3	Idling is rough due to unstable combustion in the No. 3 cylinder	03	Flow chart [Rough Idling] step 3	Refer to Rough Idling [08/2020 - ]
   X0824	Rough Idle #4	Idling is rough due to unstable combustion in the No. 4 cylinder	03	Flow chart [Rough Idling] step 3	Refer to Rough Idling [08/2020 - ]
   X082A	Rough Idle (Plural Cylinders)	Idling is rough due to multiple cylinders As more than one cylinder is affected, the EGR system, fuel system, etc. is suspected	03	Flow chart [Rough Idling] step 3	Refer to Rough Idling [08/2020 - ]
   X082D	Rough Idle (Compression Leakage)	Idling is judged to be rough due to compression leakage	03	Flow chart [Rough Idling] step 3	Refer to Rough Idling [08/2020 - ]
   X082E	Rough Idle (Low Frequency)	Slight rough idle symptoms are detected 3 times in 10 trips HINT:  As the rough idle symptoms are slight, if rough idle codes other than rough idle (low frequency) code X082E are stored, this code will not be stored.	03	Flow chart [Rough Idling] step 3	Refer to Rough Idling [08/2020 - ]
   X0844	Engine Lack of Power	Detection Condition (Engine Lack of Power)  Prerequisite Conditions: All of the following conditions are met The accelerator opening angle 80% or more. The engine speed is 400 rpm or more. The intake air temperature is 80°C (176°F) or less. The atmospheric pressure is 61 kPa(abs) [8.70 psi(abs)] or higher. The STP signal is off. The STA signal is off. Shift state is not in P or N. Detects a condition where the output torque is insufficient approximately 65% or more relative to the requested torque (divided value of the output torque is approximately 0.35 less than the requested torque) Duration: 2 seconds or more	04	Flowchart [Lack of Power] step 3	Refer to Lack of Power [08/2020 - 08/2021]
   X0845	Engine Lack of Power (Bad Fuel Condition)	Engine output is insufficient due to bad quality fuel (Fuel quality is bad due to fuel aging degradation, water intrusion or fuel additive)	04	Flowchart [Lack of Power] step 3	Refer to Lack of Power [08/2020 - 08/2021]
   X0850	Engine Oil Pressure Low	The engine oil pressure is low	05	-	-
   X0851	Engine Coolant Temperature High	The engine coolant temperature is high (overheating)	05	-	-
   X0852	Engine RPM High	The engine speed is high (over revving)	05	-	-
   X0854	Engine Coolant Temperature High (Low Voltage)	The engine coolant temperature is high (overheating) due to a low engine water pump assembly voltage causing the engine water pump assembly to stop	05	-	-

   Engine Difficult to Start Duration Judgment Region (Engine Starting Time Long) (X0810) 

   Fig 1: Region Indication Malfunction

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   STORED DATA
   
   

   Stored Group	Number of Records	Number of Freeze Frame Points	Multi Freeze Frame Data Sampling Period	Note
   03	1 code HINT:  If the detection conditions for a code that is not currently stored are met, the code will be stored. If the detection conditions for a code that is currently stored are met again in the same trip, the code will not be overwritten. If the detection conditions for a code that is currently stored are met again in a different trip, the code will be overwritten. If rough idle codes other than Rough Idle (Low Frequency) code X082E are stored, data for code X082E will not be overwritten.	7 points (1 point at detection + 6 points before detection) HINT:  When the value of a data item does not change across all points, only the value at the detection point will be displayed.	0.5 seconds	The data can be cleared by using the Techstream or by disconnecting the cable from the negative (-) battery terminal.
   04	1 code HINT:  If the detection conditions for a code that is not currently stored are met, the code will be stored. If the detection conditions for a code that is currently stored are met again in the same trip, the code will not be overwritten. If the detection conditions for a code that is currently stored are met again in a different trip, the code will be overwritten.	7 points (1 point at detection + 6 points before detection) HINT:  When the value of a data item does not change across all points, only the value at the detection point will be displayed.	0.5 seconds	The data can be cleared by using the Techstream or by disconnecting the cable from the negative (-) battery terminal.
   05	4 codes HINT:  If the detection conditions for a code that is not currently stored are met, the code will be stored. If the detection conditions for a code that is currently stored are met again in the same trip, the code will not be overwritten. If the detection conditions for a code that is currently stored are met again in a different trip, the code will be overwritten.	1 point (multi Freeze Frame Data not available)	-	The data can be cleared by using the Techstream. The data cannot be cleared by disconnecting the cable from the negative (-) battery terminal.
   08	1 codes HINT:  If the detection conditions for a code that is not currently stored are met, the code will be stored. If the detection conditions for a code that is currently stored are met again in the same trip, the code will not be overwritten. If the detection conditions for a code that is currently stored are met again in a different trip, the code will be overwritten.	12 points (1 point at detection + 8 points before detection + 3 points after detection) HINT:  When the value of a data item does not change across all points, only the value at the detection point will be displayed.	0.5 seconds	The data can be cleared by using the Techstream. The data cannot be cleared by disconnecting the cable from the negative (-) battery terminal.
   09	1 code HINT:  If the detection conditions for a code that is not currently stored are met, the code will be stored. If the detection conditions for a code that is currently stored are met again in the same trip, the code will not be overwritten. If the detection conditions for a code that is currently stored are met again in a different trip, the code will be overwritten.	7 points (1 point at detection + 3 points before detection + 3 points after detection) HINT:  When the value of a data item does not change across all points, only the value at the detection point will be displayed.	0.5 seconds	The data can be cleared by using the Techstream or by disconnecting the cable from the negative (-) battery terminal.

   HINT: 

   • Multi Freeze Frame Data makes it possible to display the engine condition (ECU data) both before and after the trigger detection point.
   • The number of available points differs depending on the stored group.
   • When the value of a data item does not change across all points, only the value at the detection point will be displayed.
   Fig 2: Stored Group 03, 04

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   Fig 3: Stored Group 08

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   Fig 4: Stored Group 09

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Only 1 measurement point can be displayed for stored group 05 Freeze Frame Data.

   Vehicle Control History Freeze Frame Data 

   Fig 5: Vehicle Control History Freeze Frame Data (1 of 2)
   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   Fig 6: Vehicle Control History Freeze Frame Data (2 of 2)
   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine / Utility / Vehicle Control History (RoB) / Clear.
   NOTE:

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

HINT: 

A part of the control history can be confirmed using the vehicle control history.

Refer to VEHICLE CONTROL HISTORY [06/2018 - ]