How To Proceed With Troubleshooting [09/2014 - ]: Procedure

VEHICLE BROUGHT TO WORKSHOP
Result

Proceed to

NEXT

Result:

NEXT

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

Proceed to
NEXT

Result:

See step 3

PRE-CHECK

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

Proceed to
NEXT

Result:

See step 4

CHECK COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM*

Using the Techstream, check for CAN communication system DTCs.

Refer to DIAGNOSIS SYSTEM [09/2014 - 08/2016] , or refer to DIAGNOSIS SYSTEM [08/2016 - 11/2017] , or refer to DIAGNOSIS SYSTEM [11/2017 - 03/2019] , or refer to DIAGNOSIS SYSTEM [03/2019 - 09/2020] , or refer to DIAGNOSIS SYSTEM [09/2020 - 01/2023] , or refer to DIAGNOSIS SYSTEM [01/2023 - 10/2023] , or refer to DIAGNOSIS SYSTEM [10/2023 - ]

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 [09/2014 - 11/2017] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2017 - 03/2019] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [03/2019 - 01/2023] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [01/2023 - ]

Result:

See step 5

CHECK COMMUNICATION FUNCTION OF LIN COMMUNICATION SYSTEM*

Using the Techstream, check for LIN communication system DTCs.

Refer to DTC CHECK / CLEAR [09/2014 - ]

Result

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

Result:

GO TO LIN COMMUNICATION SYSTEM. Refer to DIAGNOSTIC TROUBLE CODE CHART [09/2014 - 01/2023] , or refer to DIAGNOSTIC TROUBLE CODE CHART [01/2023 - ]

Result:

See step 6

CHECK FOR DTC (MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY)*

Clear the DTCs.
Refer to DTC CHECK / CLEAR [09/2014 - ]

Body Electrical > Master Switch > Clear DTCs

Recheck for DTCs.

Body Electrical > Master Switch > Trouble Codes

Result

Result	Proceed to
DTC B2312 is not output	A
DTC B2312 is output	B

Result:

GO TO POWER WINDOW CONTROL SYSTEM. Refer to DTC B2312: Power Window Switch Malfunction [09/2014 - ]

Result:

See step 7

CHECK FOR DTC (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))*

Clear the DTCs.
Refer to DTC CHECK / CLEAR [09/2014 - ]

Body Electrical > Main Body > Clear DTCs

Recheck for DTCs.

Body Electrical > Main Body > Trouble Codes

Result

Result	Proceed to
DTC B1243 is not output	A
DTC B1243 is output	B

Result:

GO TO DIAGNOSTIC TROUBLE CODE CHART. Refer to DIAGNOSTIC TROUBLE CODE CHART [09/2014 - ]

Result:

See step 8

PROBLEM SYMPTOMS TABLE

Refer to Problem Symptoms Table.

Refer to PROBLEM SYMPTOMS TABLE [09/2014 - ]

Result

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

Result:

See step 10

Result:

See step 9

OVERALL ANALYSIS AND TROUBLESHOOTING*

Terminals of ECU
Refer to TERMINALS OF ECU [09/2014 - ]
Data List / Active Test
Refer to DATA LIST / ACTIVE TEST [09/2014 - ]
Operation Check
Refer to OPERATION CHECK [09/2014 - ]

Inspection

Result

Proceed to
NEXT

Result:

See step 10

REPAIR OR REPLACE
Result

Proceed to

NEXT

Result:

NEXT

See step 11
CONFIRMATION TEST
Result

Proceed to

NEXT

Result:

NEXT

END