How To Proceed With Troubleshooting [12/2017 - 10/2020]: Procedure

VEHICLE BROUGHT TO WORKSHOP
Result

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NEXT

Result:

NEXT

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, 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 control system has started
How did it happen?	Problem symptoms

Result

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Result:

See step 3

INSPECT BATTERY VOLTAGE

Measure the battery voltage.
Standard voltage

11 to 14 V

If the voltage is below 11 V, recharge or replace the 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 4

CHECK COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM*

Using the Techstream, check for CAN communication system DTCs.

Refer to DIAGNOSIS SYSTEM [12/2017 - 09/2018] , or refer to DIAGNOSIS SYSTEM [09/2018 - 09/2019] , or refer to DIAGNOSIS SYSTEM [09/2019 - 10/2020]

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 [12/2017 - 09/2018] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2018 - 10/2020]

Result:

See step 5

CHECK PCS WARNING LIGHT

Check the PCS warning light status.

Result

Result	Proceed to
Only the PCS warning light is blinking	A
The PCS warning light is not blinking	B

Result:

GO TO FAIL-SAFE CHART. Refer to FAIL-SAFE CHART [12/2017 - 10/2020]

Result:

See step 6

CHECK MULTI-INFORMATION DISPLAY

Check if a warning message for the pre-collision system is displayed on the multi-information display (in the combination meter assembly).

Each function of the combination meter assembly operates normally.

Result

Result	Proceed to
Pre-collision system warning message is not displayed	A
"Pre-Collision System Malfunction Visit Your Dealer" and "Pre-Collision Seatbelt Unavailable" is displayed	B

Result:

GO TO PROBLEM SYMPTOMS TABLE. Refer to FAIL-SAFE CHART [12/2017 - 10/2020]

Result:

See step 7

CHECK DTC OUTPUT*

Check for DTCs.

Refer to DTC CHECK / CLEAR [12/2017 - 10/2020]

Body Electrical > Seat Belt Control > Trouble Codes

DTCs are not output.

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 [12/2017 - 10/2020]

Result:

See step 8

VEHICLE CONTROL HISTORY

Check vehicle control history.

Refer to VEHICLE CONTROL HISTORY [12/2017 - 10/2020]

Body Electrical > Seat Belt Control > Utility

Tester Display
Vehicle Control History (RoB)

Result

Result	Proceed to
Vehicle control histories are not output	A
Vehicle control histories are output	B

Result:

GO TO VEHICLE CONTROL HISTORY. Refer to VEHICLE CONTROL HISTORY [12/2017 - 10/2020]

Result:

See step 9

VEHICLE CONTROL HISTORY (PRE-COLLISION SYSTEM)

Check vehicle control history.

Refer to VEHICLE CONTROL HISTORY [12/2017 - 09/2018] , or refer to VEHICLE CONTROL HISTORY [09/2018 - 10/2020]

Body Electrical > Pre-Collision System > Utility

Tester Display
Vehicle Control History (RoB)

Result

Result	Proceed to
Vehicle control histories are not output	A
Vehicle control histories are output	B

Result:

GO TO VEHICLE CONTROL HISTORY. Refer to VEHICLE CONTROL HISTORY [12/2017 - 09/2018] , or refer to VEHICLE CONTROL HISTORY [09/2018 - 10/2020]

Result:

See step 10

PROBLEM SYMPTOMS TABLE

Refer to Problem Symptoms Table.

Refer to PROBLEM SYMPTOMS TABLE [12/2017 - 10/2020]

Result

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

Result:

See step 12

Result:

See step 11

OVERALL ANALYSIS AND TROUBLESHOOTING*

Operation check
Refer to OPERATION CHECK [12/2017 - 10/2020]
Data List / Active Test
Refer to DATA LIST / ACTIVE TEST [12/2017 - 10/2020]

Terminals of ECU

Refer to TERMINALS OF ECU [12/2017 - 10/2020]

Result

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NEXT

Result:

See step 12

REPAIR OR REPLACE
Result

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Result:

NEXT

See step 13
CONFIRMATION TEST
Result

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Result:

NEXT

END