How To Proceed With Troubleshooting [07/2022 - ]: Procedure

VEHICLE BROUGHT TO WORKSHOP
Result

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Result:

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See step 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 items are important points for problem analysis:

What	Vehicle model, system name
When	Date, time, occurrence frequency
Where	Road conditions
Under what conditions?	Driving conditions, weather conditions
How did it happen?	Problem symptoms

Result

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Result:

See step 3

READ OUT AND SAVE OPERATION HISTORY

NOTE:

If the vehicle or vehicle controls are operated (for example, during initial inspection when the vehicle is brought in for repair) before operation history has been read out and saved, the operation history information could be lost.
The function "Read operation history" uses the current system time setting inside the Techstream and the time counter inside the controlling ECU to calculate the timings shown in the operation history. For this reason, before reading out the operation history, first make sure that the Techstream system clock is accurately set to the current time.

Read out and save operation history using the Techstream.

Refer to CHECK FOR INTERMITTENT PROBLEMS [10/2018 - ]

Body Electrical > Wiper > Utility

Tester Display
Operation History

Result

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Result:

See step 4

PRE-CHECK

Measure the auxiliary battery voltage with the ignition switch off.
Standard Voltage

11 to 14 V

If the voltage is below 11 V, recharge or replace the auxiliary battery before proceeding to the next step.
Check the fuses and relays.

Check the connector connections and terminals to make sure that there are no abnormalities such as loose connections, deformation, etc.

Result

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Result:

See step 5

CHECK COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM*

Using the Techstream, check for CAN communication system DTCs.

Refer to DIAGNOSIS SYSTEM [07/2022 - ]

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 [10/2018 - ]

Result:

See step 6

CHECK FOR DTC*

Check for DTCs.

Body Electrical > Wiper > Trouble Codes

Body Electrical > Main Body > Trouble Codes

Body Electrical > Rain and/or Humidity Sensor > Trouble Codes

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 [07/2022 - ]

Result:

See step 7

PROBLEM SYMPTOMS TABLE

Refer to Problem Symptoms Table.

Refer to PROBLEM SYMPTOMS TABLE [07/2022 - ]

Result

Result	Proceed to
Fault is not listed in Problem Symptoms Table	A
Fault is listed in Problem Symptoms Table	B

Result:

GO TO PROBLEM SYMPTOMS TABLE. Refer to PROBLEM SYMPTOMS TABLE [07/2022 - ]

Result:

See step 8

OVERALL ANALYSIS AND TROUBLESHOOTING*

Operation Check.
Refer to OPERATION CHECK [10/2020 - ]
Customize Parameters
Refer to CUSTOMIZE PARAMETERS [10/2020 - ]
Terminals of ECU
Refer to TERMINALS OF ECU [10/2020 - ]
Fail-safe Chart
Refer to FAIL-SAFE CHART [10/2020 - ]
Data List / Active Test
Refer to DATA LIST / ACTIVE TEST [10/2020 - ]
Inspection

On-vehicle inspection

Result

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Result:

See step 9

ADJUST, REPAIR OR REPLACE
Result

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Result:

NEXT

See step 10
CONFIRMATION TEST
Result

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Result:

NEXT

END