How To Proceed With Troubleshooting [10/2018 - 07/2022]: Procedure

VEHICLE BROUGHT TO WORKSHOP
Result

Proceed to

NEXT

Result:

NEXT

See step 2

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

Proceed to
NEXT

Result:

See step 3

INSPECT MULTI-INFORMATION DISPLAY

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

HINT:

If more than one message is displayed, perform each inspection in the order listed in the table.

Result

Result	Proceed to
"VSC Turned OFF Pre-Collision Brake System Unavailable" is displayed	A
"Pre-Collision System Malfunction Visit Your Dealer" is displayed	B
"Pre-Collision System Unavailable Clean Sensor" is displayed	C
Any of the following messages is displayed: "Pre-Collision System Unavailable" "Front Camera Unavailable" "Front Camera Unavailable See Owner's Manual"	D
Warning message is not displayed	E

Result:

GO TO PROBLEM SYMPTOMS TABLE. Refer to PROBLEM SYMPTOMS TABLE [10/2018 - 07/2022]

Result:

See step 9

Result:

See step 6

Result:

See step 13

Result:

See step 4

CHECK CAN COMMUNICATION SYSTEM*

Using the Techstream, check if the CAN communication system is functioning normally.

HINT:

Refer to CAN Bus Check in CAN Communication System.

for HV Model: Refer to DIAGNOSIS SYSTEM [10/2018 - 10/2019] , or refer to DIAGNOSIS SYSTEM [10/2019 - 08/2021] , or refer to DIAGNOSIS SYSTEM [08/2021 - 07/2022]
for Gasoline Model: Refer to DIAGNOSIS SYSTEM [10/2018 - 10/2019] , or refer to DIAGNOSIS SYSTEM [10/2019 - 07/2022]

CAN communication system is functioning normally.

Result

Result	Proceed to
OK	A
NG (for Gasoline Model)	B
NG (for HV Model)	C

Result:

GO TO CAN COMMUNICATION SYSTEM. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2018 - 07/2022]

Result:

GO TO CAN COMMUNICATION SYSTEM. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2018 - ]

Result:

See step 5

CHECK FOR DTCs*

Using the Techstream, check for DTCs.
Body Electrical > Pre-Collision System > Trouble Codes

Make a note of the output DTCs.

Result

Result	Proceed to
DTCs are not output	A
DTC C142571 is output	B
DTCs other than C142571 are output	C

Result:

GO TO DTC CHART (C142571). Refer to DTC C1425-71: Stop Light Relay Actuator Stuck [10/2018 - 07/2022]

Result:

See step 8

Result:

See step 6

CHECK VEHICLE CONTROL HISTORY*

Using the Techstream, check for Vehicle Control History (RoB).

Body Electrical > Pre-Collision System > Utility

Tester Display
Vehicle Control History (RoB)

Record any output Vehicle Control History (RoB).

Result

Result	Proceed to
Vehicle Control History (RoB) codes are not output	A
Vehicle Control History (RoB) code X2013, X2015, X2022, X2024, X2025, X2026 or X2028 is output	B
Vehicle Control History (RoB) codes other than X2013, X2015, X2022, X2024, X2025, X2026 and X2028 are output	C

Result:

GO TO SYMPTOM SIMULATION. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2018 - ]

Result:

GO TO VEHICLE CONTROL HISTORY (X2013, X2015, X2022, X2024, X2025, X2026 or X2028). Refer to VEHICLE CONTROL HISTORY [10/2018 - 07/2022]

Result:

See step 7

RECONFIRM VEHICLE CONTROL HISTORY*

Using the Techstream, clear the Vehicle Control History (RoB).

Body Electrical > Pre-Collision System > Utility

Tester Display
Vehicle Control History (RoB)

Using the Techstream, check for Vehicle Control History (RoB).

Body Electrical > Pre-Collision System > Utility

Tester Display
Vehicle Control History (RoB)

Result

Result	Proceed to
Vehicle Control History codes (RoB) are not output	A
Vehicle Control History codes (RoB) are output	B

Result:

GO TO SYMPTOM SIMULATION. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2018 - ]

Result:

GO TO VEHICLE CONTROL HISTORY. Refer to VEHICLE CONTROL HISTORY [10/2018 - 07/2022]

RECONFIRM DTC OUTPUT*

Using the Techstream, clear the DTCs.
Body Electrical > Pre-Collision System > Clear DTCs
Reproduce the vehicle conditions that were present when the DTCs that were noted were stored.
HINT:

Refer to each corresponding DTC for details on the detection conditions.

Refer to DIAGNOSTIC TROUBLE CODE CHART [10/2018 - 08/2021] , or refer to DIAGNOSTIC TROUBLE CODE CHART [08/2021 - 07/2022]

Using the Techstream, check for DTCs.

Body Electrical > Pre-Collision System > Trouble Codes

Result

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

Result:

GO TO SYMPTOM SIMULATION. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2018 - ]

Result:

GO TO DTC CHART. Refer to DIAGNOSTIC TROUBLE CODE CHART [10/2018 - 08/2021] , or refer to DIAGNOSTIC TROUBLE CODE CHART [08/2021 - 07/2022]

INSPECT MILLIMETER WAVE RADAR SENSOR ASSEMBLY

Check whether the millimeter wave radar sensor assembly and surrounding area is dirty or obstructed by foreign matter.
HINT:
- A non-genuine millimeter wave sensor cover is installed
- The millimeter wave radar sensor assembly or front grille emblem and its surrounding area are dirty
- An accessory, such as bull bars, a grille guard, etc., which interferes with millimeter radio waves is installed
- The sensor cover or its surrounding area has been painted or has a sticker attached
- There is foreign matter attached to or between the front grille emblem or millimeter wave radar sensor assembly

Clean away any dirt or foreign matter that is adhering to the area around the millimeter wave radar sensor assembly.

Result

Proceed to
NEXT

Result:

See step 10

INSPECT MULTI-INFORMATION DISPLAY

NOTE:

Before inspecting the multi-information display, be sure to first turn the ignition switch off and then ON again.

Turn the ignition switch off.
Turn the ignition switch ON.

Check whether "Pre-Collision System Unavailable Clean Sensor" is displayed on the multi-information display.

Result

Result	Proceed to
Not displayed	A
Displayed	B

Result:

ADJUST MILLIMETER WAVE RADAR SENSOR ASSEMBLY. Refer to ADJUSTMENT [10/2018 - 07/2022]

Result:

See step 11

READ VALUE USING TECHSTREAM (ON-LINE CALIBRATION ANGLE (HORIZONTAL))

Using the Techstream, read the following Data List items for the front radar system.

Body Electrical > Front Radar Sensor > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
On-Line Calibration Angle (Horizontal)	Calibrated angle value (horizontal)	Min.: -12.8 deg, Max.: 12.7 deg	Learned value	-

Standard

The value displayed is less than -0.5 to 0.5 deg.

Result

Proceed to
OK
NG

Result:

ADJUST MILLIMETER WAVE RADAR SENSOR ASSEMBLY. Refer to ADJUSTMENT [10/2018 - 07/2022]

Result:

See step 12

EXPLAIN TO CUSTOMER

Explain to the customer that the "Temporarily Unavailable" message on the multi-information display was caused by dirt or foreign matter adhering to the area around the millimeter wave radar sensor assembly, and that the situation has been corrected.

Result

Proceed to
NEXT

Result:

END

PROBLEM SYMPTOMS TABLE

Refer to Problem Symptoms Table for the pre-collision system.

Refer to PROBLEM SYMPTOMS TABLE [10/2018 - 07/2022]

Result

Result	Proceed to
Problem symptoms are not listed in the Problem Symptoms Table.	A
Problem symptoms are listed in the Problem Symptoms Table.	B

Result:

GO TO PROBLEM SYMPTOMS TABLE. Refer to PROBLEM SYMPTOMS TABLE [10/2018 - 07/2022]

Result:

See step 14

CHECK CONDITIONS WHEN PRE-COLLISION SYSTEM DID NOT OPERATE

Check if the exception conditions for the pre-collision system were met.

Refer to PRECAUTION [10/2018 - 07/2022]

Result

Result	Proceed to
The exception conditions were not met.	A
The exception conditions were met.	B

Result:

END (The pre-collision system operated accordingly with the operation and prohibition conditions.)

Result:

See step 15

INSPECT MILLIMETER WAVE RADAR SENSOR ASSEMBLY (BEAM AXIS MISALIGNMENT READING)*

NOTE:

Before checking for millimeter wave radar sensor beam axis misalignment, make sure that the radiator grille and front bumper are correctly installed and have not been damaged or modified.

Adjust the reflector height.
Refer to ADJUSTMENT [10/2018 - 07/2022]
Place the reflector.
Refer to ADJUSTMENT [10/2018 - 07/2022]
Connect the Techstream to the DLC3.
Turn the ignition switch to ON.
Turn the Techstream on.

Enter the following menus: Body Electrical / Front Radar Sensor / Utility / Front Beam Axis Misalignment Reading.

Body Electrical > Front Radar Sensor > Utility

Tester Display
Front Beam Axis Misalignment Reading

Check the amount of misalignment.

Standard

Vertical Direction	-5 to 5 deg.
Horizontal Direction	-0.6 to 0.6 deg.

HINT:

The millimeter wave radar sensor assembly automatically calibrates the beam axis while the vehicle is being driven. The specified values apply to the automatic calibration only and do not apply during manual beam axis adjustment of the millimeter wave radar sensor assembly.

Result

Result	Proceed to
The beam axis values are within specification.	A
The beam axis values are not within specification.	B

Result:

GO TO SYMPTOM SIMULATION. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2018 - ]

Result:

ADJUST MILLIMETER WAVE RADAR SENSOR ASSEMBLY. Refer to ADJUSTMENT [10/2018 - 07/2022]