T-TT-0615-20 Rev

Tech Tip T-TT-0615-20
Subject
August 07, 2020
Market
Vehicle Drivability Complaint Questionnaire
Service Category
Section
Engine/Hybrid System
Engine Control
USA
Applicability
Tacoma Camry Sienna Highlander RAV4
APPLICABLE VEHICLES
2018-2021
2018-2021
2018-2020
2018-2021
2018-2021
Highlander
Tundra
Sienna
Camry
Sequoia
2018-2021
2018-2021
2018-2021
2018-2021
2018-2021
Tacoma
4Runner
RAV4
Corolla
Avalon
CONDITION
The Toyota Quality group is looking to better understand our customers expectation regarding vehicle
drivability. Specifically, we are looking at vehicle surge/hesitation condition (inconsistent acceleration)
and would like to recover detailed customer voice and vehicle data.
Refer to the surge/hesitation graph below.
If you have a customer with this type of concern,
and no other fault with the vehicle has been
found, follow the instructions below.
If you are unclear if the customer is experiencing
a surge/hesitation condition, continue to follow
the instructions below.
RECOMMENDATIONS
Collect the following information and then contact TAS.
Dealer Provided:
Vehicle information
 Tire condition
- Brand
- Size (e.g. 195/65 R15 91H)
- Tread depth, equal tread depth
- Air pressure when customer arrives at the dealer
 Aftermarket products (lift kit, wheels, non-OEM tires)
 Current EFI/ECT software/calibration number
Expires on
Ver. 2.12 01/01/2020 T
02/07/2021
Rev2
© 2020, Toyota Motor Sales, USA
Page 1 of 3
Tech Tip T-TT-0615-20
August 07, 2020
Subject
Market
Vehicle Drivability Complaint Questionnaire
USA
Applicability
RECOMMENDATIONS
Evaluation/duplication drive (If you cannot duplicate, Request this information from the customer)
 Road information where customer condition is duplicated (street name, location, smoothness,
when traveling uphill or downhill, etc.)
 Elevation of testing area
 Weather condition of test (ambient air temp, rain, etc.)
 AC status (on/off, temperature, defroster, etc.)
 If duplicated, confirm condition is the exact same to what the customer typically experiences. If
any difference is felt (severity, duration etc.) please note.
Customer Provided Information
 See questionnaire below and have customer fill out (questionnaire can also be found under
“Customer Interview Forms” on Service Lane --> Knowledge Center.)
Data Recording:
During drive with the customer, take a vehicle snapshot using Techstream to capture only the
following datalist parameters.
PID Values
Vehicle speed
Engine speed
Calculated load
Mass air flow Sensor
Atmospheric pressure
Coolant temperature
A/T oil temperature No.1
Intake air temperature
Ambient air temperature
Engine run time
IG-On coolant temperature
IG-On intake air temperature
Battery voltage
Stop Light SW
Units
MPH
RPM
%
gm/sec
psi
°F
°F
°F
°F
sec
°F
°F
V
On/Off
Accelerator position
Open side malfunction
Throttle request position
Throttle sensor position
Throttle position command
Throttle position sensor open position No.1
Output axis speed
NT sensor speed
Shift SW status (P,R,N,S,D range)
Drive mode status
Power mode SW
Lock up status
Shift status
Actual engine percent torque
%
On/Off
V
%
V
V
rpm
rpm
On/Off
Normal
On/Off
On/Off
1-6
%
Please mark (Flag) each instance of the customer compliant.
- For technician drive only (do NOT have customer perform) – during condition duplication, select
neutral gear position and see if the drivability condition changes in any way. Note change if
any. This will help determine if it is drivetrain or vehicle side related.
Once all items are complete (vehicle data, customer questionnaire, Techstream snapshot) create a
TAS case using the listed symptom codes



Service Category - Drivetrain
Section - Automatic Transmission/Transaxle
SubComponent - Shift Function
Expires on
Ver. 2.12 01/01/2020 T
02/07/2021
Rev2
© 2020, Toyota Motor Sales, USA
Page 2 of 3
Tech Tip T-TT-0615-20
August 07, 2020
Subject
Market
Vehicle Drivability Complaint Questionnaire
USA
Applicability
RECOMMENDATIONS
 Condition - Design/Less Than Expectation
Attach all documents and a technical review of the information will be conducted. Contact your
field representative if there are any questions.
Vehicle Drivability – Customer Questionnaire
1. Fuel
- Octane (is same octane used all the time?) _____________________________________
o Please provide most commonly used brand of fuel ___________________________
2. Occurrence
- Location/area where condition is commonly felt (Street Name, Intersecting roads, Road
surface, etc.)
__________________________________________________________________________
- When does condition occur after startup? (immediately, after x minutes, startup has no affect)
______________________________________________________________________
- How long does this occurrence last? (short single instance, couple seconds, etc.)
______________________________________________________________________
LINK REFERENCES
This Tech Tip does not contain any link references
Expires on
Ver. 2.12 01/01/2020 T
02/07/2021
Rev2
© 2020, Toyota Motor Sales, USA
Page 3 of 3