How To Proceed With Troubleshooting [01/2023 - ]: Procedure

Result

Result: 

NEXT 

See step  2

Pre-collision System Customer Problem Analysis					Vehicle Brought to Workshop
					Year	Month	Day
Dealer name		Person in charge at headquarters			Telephone number
Shop name		Person in charge at shop
Frame type		Frame No.		First Registered Year		Total distance traveled
Customer Concerns (Include details)		Does not operate
		Operates abnormally
Date of malfunction occurrence (Since when)		Year	Month	Day	Approx. Time
Date of last inspection		Year	Month	Day
Frequency of problem symptoms		Once / Occasionally (times per day, times per month) / Every time certain conditions are met ()
Weather	Sunny / Cloudy / Rain / Snow (Amount of snowfall cm) / Other ()			Vehicle speed	Approximately () km/h
Place	Prefecture/State/Providence (Attach a map if possible)
Driving path (where vehicle turned, where driver attempted to drive to, etc.) * Describe the conditions immediately after the occurrence in as much detail as possible.		Conditions of Occurrence Diagram Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
		Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
		Surrounding road conditions Describe whether there were any billboards, metal objects on the road (manholes), guardrails, pipes, cat's eyes, gate bars, etc.
Urban area / Suburbs / Highway / Other ()			Road surface conditions		Temperature	About °C (°F)
Direction of travel		Straight / Right turn / Left turn / Right curve / Left curve			Snow wall(s)	Y / N
Driving lane		Number of lanes on one side (lanes) / () lane(s) from left			Backlighting	Y / N
Condition of external area around detection sensor			No foreign matter / Foreign matter (water, snow, ice, other)
Additional information about condition of vehicle exterior (other than above)
DTC		First Time (when vehicle brought to workshop)
		Second Time (after clearing DTC)
Status of operation switch		Pre-collision system cancel switch		Far / Medium / Near / OFF	VSC OFF switch		ON / OFF
Serial number of main part * Fill in when removing, installing or replacing part		Forward recognition camera
Describe the items to the right in as much detail as possible.	Driver operation	Accelerator pedal operated / Brake pedal operated / Steering wheel operated			Time elapsed after hybrid system or engine was started	Approximately () minutes
	Tire pressure inspection result	Front: LH () kPa RH () kPa Standard () kPa
		Rear: LH () kPa RH () kPa Standard () kPa
	Sensor optical axis inspection result	Forward recognition camera			Accident history	Y / N
		Millimeter wave radar sensor assembly			Accident history	Y / N
	Vehicle modified	Y () / N
	Items installed or attached around windshield glass	Drive recorder* / Radar detector / Navigation unit (genuine/non-genuine) / ETC / Charms or toys / Other: *: As information regarding the item is important for the investigation, make sure to obtain the item if permission is given by the customer.

Result

Result: 

NEXT 

See step  3

1. Measure the battery voltage.

   Standard voltage

   11 to 14 V

   HINT: 

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

2. Check the fuses and relays.
3. 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: 

NEXT 

See step  4

1. 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 warning message is displayed, check in the order of A, B, C, D and E.

   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 Radar Sensor Blocked Unavailable Clean Radar Sensor" is displayed	C
   Any of the following messages is displayed: "Pre-Collision System Unavailable See Owner's Manual" "Pre-Collision System Out of Temperature Range Unavailable See Owner's Manual" "Pre-Collision System Radar In Self Calibration Unavailable See Owner's Manual" "Front Camera Out of Temperature Range Unavailable Wait until Normal Temperature" "Front Camera Low Visibility Unavailable See Owner's Manual" "Front Camera Unavailable See Owner's Manual"	D
   Pre-collision system warning message is not displayed	E

Result: 

A 

GO TO PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [01/2023 - ]  

Result: 

C 

See step  10

Result: 

D 

See step  7

Result: 

E 

See step  14

Result: 

B 

See step  5

1. Using the Techstream, check for CAN communication system DTCs.

   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: 

B 

GO TO CAN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [01/2023 - ] 

Result: 

A 

See step  6

1. Check for DTCs.

   Body Electrical > Pre-Collision System > Trouble Codes 

   Result

   Result	Proceed to
   DTCs are not output	A
   DTC (C1425-71) is output	B
   A DTC other than (C1425-71) is output	C

Result: 

B 

GO TO DTC CHART (C1425-71). Refer to  DTC C1425-71: Stop Light Relay Actuator Stuck [01/2023 - ] 

Result: 

C 

See step  9

Result: 

A 

See step  7

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

   Body Electrical > Pre-Collision System > Utility 

   Tester Display
   Vehicle Control History (RoB)

2. If the Vehicle Control History (RoB) is output, record it.

   Result

   Result	Proceed to
   Vehicle control history is not output	A
   Vehicle control history (X2006, X2013, X2015, X2022, X2025, X2026 or X2028) is output	B
   Vehicle control history other than (X2006, X2013, X2015, X2022, X2025, X2026 and X2028) is output	C

Result: 

A 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [01/2023 - ] 

Result: 

B 

GO TO VEHICLE CONTROL HISTORY. Refer to  VEHICLE CONTROL HISTORY [01/2023 - ] 

Result: 

C 

See step  8

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

   Body Electrical > Pre-Collision System > Utility 

   Tester Display
   Vehicle Control History (RoB)

2. 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 (RoB) is not output	A
   Vehicle Control History (RoB) is output	B

Result: 

A 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [01/2023 - ] 

Result: 

B 

GO TO VEHICLE CONTROL HISTORY. Refer to  VEHICLE CONTROL HISTORY [01/2023 - ] 

1. Using the Techstream, clear the DTCs.

   Body Electrical > Pre-Collision System > Clear DTCs 

2. 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.

3. Using the Techstream, check if the DTCs are output again.

   Body Electrical > Pre-Collision System > Trouble Codes 

   Result

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

Result: 

A 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [01/2023 - ] 

Result: 

B 

GO TO DIAGNOSTIC TROUBLE CODE CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART [01/2023 - ]  

1. Check whether the millimeter wave radar sensor assembly and surrounding area is dirty or obstructed by foreign matter.

   HINT: 

   Check that the following situations do not occur.

   • A non-genuine radar sensor cover is installed
   • The millimeter wave radar sensor assembly or radar sensor cover 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 radar sensor cover or its surrounding area has been painted or has a sticker attached
   • There is foreign matter between the radar sensor cover and millimeter wave radar sensor assembly
2. 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: 

NEXT 

See step  11

1. Turn the engine switch off.
2. Turn the engine switch on (IG).
3. Check whether "Pre-Collision System Radar Sensor Blocked Unavailable Clean Radar Sensor" is displayed on the multi-information display.

   Result

   Result	Proceed to
   Not displayed	A
   Displayed	B

Result: 

B 

ADJUST MILLIMETER WAVE RADAR SENSOR ASSEMBLY 

Triangle Target: Refer to TARGET ADJUSTMENT(TRIANGLE TARGET) [01/2023 - ]

Flat Surface Target: Refer to TARGET ADJUSTMENT(FLAT SURFACE TARGET) [01/2023 - ]

Driving Adjustment: Refer to DRIVING ADJUSTMENT [01/2023 - ]

Result: 

A 

See step  12

1. 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)	-12.8 to 12.7 deg	Learned value	-

   Body Electrical > Front Radar Sensor > Data List 

   Tester Display
   On-Line Calibration Angle (Horizontal)

   Standard

   The value displayed is less than -0.6 to 0.6 deg.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

ADJUST MILLIMETER WAVE RADAR SENSOR ASSEMBLY 

Triangle Target: Refer to TARGET ADJUSTMENT(TRIANGLE TARGET) [01/2023 - ]

Flat Surface Target: Refer to TARGET ADJUSTMENT(FLAT SURFACE TARGET) [01/2023 - ]

Driving Adjustment: Refer to DRIVING ADJUSTMENT [01/2023 - ]

Result: 

OK 

See step  13

1. Explain to the customer that the "Pre-Collision System Radar Sensor Blocked Unavailable Clean Radar Sensor" 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: 

NEXT 

END 

1. Refer to Problem Symptoms Table.

   Refer to PROBLEM SYMPTOMS TABLE [01/2023 - ] 

   Result

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

Result: 

B 

GO TO PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [01/2023 - ]  

Result: 

A 

See step  15

1. Check the condition of the PCS warning light.

   Result

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

Result: 

B 

See step  17

Result: 

A 

See step  16

1. Check for vehicle control history and note any codes that are output.

   Body Electrical > Pre-Collision System > Utility 

   Tester Display
   Vehicle Control History (RoB)

   Result

   Proceed to
   NEXT

Result: 

NEXT 

GO TO VEHICLE CONTROL HISTORY. Refer to  VEHICLE CONTROL HISTORY [01/2023 - ] 

1. Check for DTCs.

   Body Electrical > Pre-Collision System > Trouble Codes 

   Result

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

Result: 

B 

See step  19

Result: 

A 

See step  18

1. Check detection condition for the confirmed pre-collision system DTC.

   Refer to FAIL-SAFE CHART [01/2023 - ] 

   Result

   Proceed to
   NEXT

Result: 

NEXT 

END 

Explain to the customer the cause of the previously stored DTC and that the output reason has been cleared.

1. Check for vehicle control history and note any codes that are output.

   Body Electrical > Pre-Collision System > Utility 

   Tester Display
   Vehicle Control History (RoB)

   1. Record the vehicle control history.

   Result

   Result	Proceed to
   Vehicle control history is not output	A
   Vehicle control history is output	B

Result: 

B 

See step  22

Result: 

A 

See step  20

1. Check the conditions when pre-collision system operates or does not operate.

   Refer to PRECAUTION [01/2023 - ] 

   Result

   Result	Proceed to
   No condition is met	A
   Any condition is met	B

Result: 

B 

END (OPERATION/NO OPERATION CONDITIONS OF PRE-COLLISION SYSTEM IS MET) 

Result: 

A 

See step  21

1. Adjust the reflector height.

   Triangle Target: Refer to TARGET ADJUSTMENT(TRIANGLE TARGET) [01/2023 - ]

   Flat Surface Target: Refer to TARGET ADJUSTMENT(FLAT SURFACE TARGET) [01/2023 - ]

2. Place the reflector.

   Triangle Target: Refer to TARGET ADJUSTMENT(TRIANGLE TARGET) [01/2023 - ]

   Flat Surface Target: Refer to TARGET ADJUSTMENT(FLAT SURFACE TARGET) [01/2023 - ]

3. Turn the cruise control main switch on.
4. Check the amount of misalignment and make a note.

   Body Electrical > Front Radar Sensor > Utility 

   Tester Display
   Front Beam Axis Misalignment Reading

   Standard (before performing adjustment)

   Front beam axis misalignment value 

   Vertical	-5.0 to 5.0 deg.
   Horizontal	-0.6 to 0.6 deg.

   Result

   Result	Proceed to
   Front beam axis misalignment value is within the specified range	A
   Front beam axis misalignment value is not within the specified range	B

Result: 

A 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [01/2023 - ] 

Result: 

B 

PERFORM FRONT BEAM AXIS ADJUSTMENT 

Triangle Target: Refer to TARGET ADJUSTMENT(TRIANGLE TARGET) [01/2023 - ]

Flat Surface Target: Refer to TARGET ADJUSTMENT(FLAT SURFACE TARGET) [01/2023 - ]

Driving Adjustment: Refer to DRIVING ADJUSTMENT [01/2023 - ]

1. Check for vehicle control history and note any codes that are output.

   Refer to VEHICLE CONTROL HISTORY [01/2023 - ]

   HINT: 

   Based on the customer's inquiry, check the corresponding factors in the vehicle control history, such as the detection time and date, trip information and elapsed time.

   Result

   Proceed to
   NEXT

Result: 

NEXT 

END 

1. Explain to the customer the cause of the previously stored vehicle control history and that the output reason has been cleared.
   NOTE:

   After the explanation, make sure to clear vehicle control history.

   Body Electrical > Pre-Collision System > Utility 

   Tester Display
   Vehicle Control History (RoB)