Toyota Tundra. Manual — part 18
the malfunction does not reoccur, perform a confirmation test under the same conditions and
in the same environment as when the malfunction occurred the first time.
NEXT : END
2. CUSTOMER PROBLEM ANALYSIS
HINT:
In troubleshooting, confirm that the problem symptoms have been accurately identified.
Preconceptions should be discarded in order to make an accurate judgment. To clearly understand
what the problem symptoms are, it is extremely important to ask the customer about the problem
and the conditions at the time the malfunction occurred.
Gather as much information as possible for reference. Past problems that seem unrelated may also
help in some cases.
The following 5 questions are important points in the problem analysis:
PROBLEM ANALYSIS QUESTIONS
3. SYMPTOM CONFIRMATION AND DIAGNOSTIC TROUBLE CODE
HINT:
The diagnostic system in the TOYOTA TUNDRA has various functions.
The first function is the Diagnostic Trouble Code (DTC) check. A DTC is a code stored in the ECU
memory whenever a malfunction in the signal circuits to the ECU occurs. In a DTC check, a
previous malfunction's DTC can be checked by a technician during troubleshooting.
Another function is the Input Signal Check, which checks if the signals from various switches are
sent to the ECU correctly.
By using these functions, the problem areas can be narrowed down and troubleshooting is more
effective. Diagnostic functions are incorporated in the following systems in the TOYOTA
TUNDRA.
DIAGNOSTIC FUNCTIONS REFERENCE
What
Vehicle model, system name
When
Date, time, occurrence frequency
Where
Road conditions
Under what conditions? Running conditions, driving conditions, weather conditions
How did it happen?
Problem symptoms
System
DTC
Check
(Normal
Mode)
DTC
Check
(Check
Mode)
Freeze
Frame
Data
Sensor
Check/Test
Mode (Input
Signal Check)
Data
List
Active
Test
Customize
Parameter
2009 Toyota Tundra
2009 GENERAL INFORMATION Introduction - Tundra
SFI System (1GR-FE)
o
o
o
-
o
o
-
SFI System (2UZ-FE)
o
o
o
-
o
o
-
SFI System (3UR-FE)
o
o
o
-
o
o
-
Automatic
Transmission System
< for 1GR-FE >
(A750E)
o
o
o
-
o
o
-
Automatic
Transmission System
< for 2UZ-FE >
(A750E)
o
o
o
-
o
o
-
Automatic
Transmission System
(A750F)
o
o
o
-
o
o
-
Automatic
Transmission System
(AB60E)
o
o
o
-
o
o
-
Automatic
Transmission System
(AB60F)
o
o
o
-
o
o
-
Tire Pressure
Warning System
o
-
-
o
o
-
-
Vehicle Stability
Control System
o
-
o
o
o
o
-
Power Tilt and Power
Telescopic Steering
Column System
o
-
o
-
o
o
o
Air Conditioning
System (for
Automatic Air
Conditioning System)
o
-
-
-
o
o
o
Air Conditioning
System (for Manual
Air Conditioning
System)
o
-
-
-
o
o
o
Airbag System
o
o
-
-
o
-
-
Occupant
Classification System
o
-
-
-
o
-
-
Seat Belt Warning
System
-
-
-
-
-
o
-
Theft Deterrent
System
-
-
-
-
o
o
o
Engine Immobilizer
System
o
-
-
-
o
o
-
Cruise Control
2009 Toyota Tundra
2009 GENERAL INFORMATION Introduction - Tundra
In the DTC check, it is very important to determine whether the problem indicated by the DTC is
either: 1) still occurring; or 2) occurred in the past but has since returned to normal. In addition, the
DTC should be compared to the problem symptom to see if they are related. For this reason, DTCs
should be checked before and after confirmation of symptoms (i.e., whether or not problem
symptoms exist) to determine current system conditions, as shown in the flowchart below.
Never skip the DTC check. Failing to check DTCs may, depending on the case, result in
unnecessary troubleshooting for systems operating normally or lead to repairs not related to the
problem. Follow the procedures listed in the flowchart in the correct order.
The following flowchart shows how to proceed with troubleshooting using the DTC check.
Directions from the flowchart will indicate how to proceed either to DTC troubleshooting or to the
troubleshooting of each problem symptom.
1. DTC CHECK
System
o
-
-
-
o
o
-
Lighting System
o
-
-
-
o
o
o
Wiper and Washer
System
-
-
-
-
o
-
-
Power Door Lock
Control System
-
-
-
-
o
o
o
Wireless Door Lock
Control System
o
-
-
-
o
o
o
Key Reminder
Warning System
-
-
-
-
o
-
-
Meter/Gauge System
o
-
-
-
o
o
o
Audio and Visual
System
o
-
-
-
-
-
-
Navigation System
(for Double Cab)
o
-
-
-
-
-
-
Navigation System
(for CrewMax)
o
-
-
-
-
-
-
Power Window
Control System
o
-
-
-
o
o
o
Windshield Deicer
System
-
-
-
-
-
o
-
Window Defogger
System
-
-
-
-
-
o
-
Power Mirror Control
System (w/Memory)
-
-
-
-
o
-
-
Sliding Roof System
o
-
-
-
o
o
o
CAN Communication
System
o
-
-
-
-
-
-
LIN Communication
System
o
-
-
-
o
-
-
2009 Toyota Tundra
2009 GENERAL INFORMATION Introduction - Tundra
NEXT
2. MAKE A NOTE OF DTCS DISPLAYED AND THEN CLEAR MEMORY
NEXT
3. SYMPTOM CONFIRMATION
Result
RESULT TABLE
B: Go to step 5
A: Go to next step.
4. SIMULATION TEST USING SYMPTOM SIMULATION METHODS
NEXT
5. DTC CHECK
Result
DTC OUTPUT RESULT
B: TROUBLESHOOTING OF PROBLEM INDICATED BY DTC
6. SYMPTOM CONFIRMATION
A: Go to next step.
Result
RESULT TABLE
Result
Proceed to
No symptoms exist
A
Symptoms exist
B
Result
Proceed to
DTC is not output
A
DTC is output
B
Result
Proceed to
Symptoms exist
A
No symptoms exist
B
2009 Toyota Tundra
2009 GENERAL INFORMATION Introduction - Tundra
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