How To Proceed With Troubleshooting [08/2019 - ]: Procedure

WARNING: This page is about a different car, the 2021 Toyota Tundra and 2020 Toyota Tundra. However, it is still accessible from the selected car via links, so may be relevant.

VEHICLE BROUGHT TO WORKSHOP
Result

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Result:

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See step 2

CUSTOMER PROBLEM ANALYSIS CHECK

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 items are important points for problem analysis:

What	Vehicle model, system name
When	Date, time, occurrence frequency, whether the problem occurred recently or has been occurring for a long time
Where	Whether the problem occurs at a specific location
Under what conditions?	Whether the doors were locked or unlocked, whether the engine switch was on (IG), whether the engine has started
How did it happen?	Problem symptoms

Result

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Result:

See step 3

INSPECT BATTERY VOLTAGE
Standard voltage

11 to 14 V

If the voltage is below 11 V, recharge or replace the battery before proceeding.

Result

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Result:

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See step 4

INSPECT COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM*

Using the Techstream, check for CAN communication system DTCs.

Refer to DIAGNOSIS SYSTEM [08/2019 - ]

Result

Result	Proceed to
CAN DTCs are not output	A
CAN DTCs are output	B

Result:

GO TO CAN COMMUNICATION SYSTEM. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2019 - ]

Result:

See step 5

CHECK FOR DTC (WIRELESS DOOR LOCK CONTROL SYSTEM)*

Clear the DTCs.
Refer to DTC CHECK / CLEAR [08/2019 - ]

Recheck for DTCs.

Refer to DTC CHECK / CLEAR [08/2019 - ]

Result

Result	Proceed to
DTCs are not output	A
DTCs are output	B

Result:

GO TO DIAGNOSTIC TROUBLE CODE CHART. Refer to DIAGNOSTIC TROUBLE CODE CHART [08/2019 - ]

Result:

See step 6

PROBLEM SYMPTOMS TABLE

Refer to Problem Symptoms Table.

Refer to PROBLEM SYMPTOMS TABLE [08/2019 - ]

Result

Result	Proceed to
Fault is not listed in problem symptoms table	A
Fault is listed in problem symptoms table	B

Result:

ADJUST, REPAIR OR REPLACE IN ACCORDANCE WITH PROBLEM SYMPTOMS TABLE

Result:

See step 7

OVERALL ANALYSIS AND TROUBLESHOOTING*

Operation Check.
Refer to OPERATION CHECK [08/2019 - ]
Terminals of ECU.
Refer to TERMINALS OF ECU [08/2019 - ]

Data List / Active Test.

Refer to DATA LIST / ACTIVE TEST [08/2019 - ]

Result

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Result:

See step 8

REPAIR OR REPLACE
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Result:

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See step 9
CONFIRMATION TEST
Result

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Result:

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END