How To Proceed With Troubleshooting [10/2022 - ]: 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 switch		Early / Mid(Middle) / Late / 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			for HV Model:  Time elapsed after hybrid system was started for Gasoline Model:  Time elapsed after 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 auxiliary battery voltage.

   HINT: 

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

   Standard Voltage

   11 to 14 V (Ignition switch off)

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 and D.

   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
   Any of the following messages is displayed: "Pre-Collision System Unavailable See Owner's Manual" "Pre-Collision System Radar In Self Calibration Unavailable See Owner's Manual" "Pre-Collision System Out of Temperature Range Unavailable See Owner's Manual" "Pre-Collision System Radar Sensor Blocked Unavailable Clean Radar Sensor" "Front Camera 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"	C
   Warning message is not displayed	D

Result: 

A 

GO TO PROBLEM SYMPTOMS TABLE 

Refer to PROBLEM SYMPTOMS TABLE [10/2022 - ] 

Result: 

C 

See step  7

Result: 

D 

See step  10

Result: 

B 

See step  5

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

   for HV Model:

   Refer to DIAGNOSIS SYSTEM [10/2022 - 10/2023] , or refer to DIAGNOSIS SYSTEM [10/2023 - 11/2024] , or refer to DIAGNOSIS SYSTEM [11/2024 - ]

   for Gasoline Model:

   Refer to DIAGNOSIS SYSTEM [10/2022 - 10/2023] , or refer to DIAGNOSIS SYSTEM [10/2023 - 11/2024] , or refer to DIAGNOSIS SYSTEM [11/2024 - ]

   CAN Bus Check 

   OK

   CAN communication system is functioning normally.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

GO TO CAN COMMUNICATION SYSTEM 

for HV Model:

Refer to HOW TO PROCEED WITH TROUBLESHOOTING [02/2019 - ]

for Gasoline Model:

Refer to HOW TO PROCEED WITH TROUBLESHOOTING [02/2019 - ]

Result: 

OK 

See step  6

1. Using the Techstream, check for DTCs.

   Body Electrical > Pre-Collision System > Trouble Codes 

2. Make a note of the output DTCs.

   Result

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

Result: 

B 

GO TO DTC CHART (C1425-71) 

Refer to DTC C1425-71: Stop Light Relay Actuator Stuck [12/2021 - ]

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. 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 X2015, X2016, X2017, X2024, X2026, X2027, X2028 or X202B is output	B
   Vehicle Control History (RoB) codes other than X2015, X2016, X2017, X2024, X2026, X2027, X2028 and X202B are output	C

Result: 

A 

GO TO SYMPTOM SIMULATION 

Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2018 - ]

Result: 

B 

GO TO VEHICLE CONTROL HISTORY 

Refer to VEHICLE CONTROL HISTORY [10/2022 - ]

Result: 

C 

See step  8

1. Clear the Vehicle Control History (RoB).

   Body Electrical > Pre-Collision System > Utility 

   Tester Display
   Vehicle Control History (RoB)

2. Recheck for Vehicle Control History (RoB).
   1. Check if the following Vehicle Control History (RoB) is output.

      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: 

A 

GO TO SYMPTOM SIMULATION 

Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2018 - ]

Result: 

B 

GO TO VEHICLE CONTROL HISTORY 

Refer to VEHICLE CONTROL HISTORY [10/2022 - ]

1. Clear the DTCs.

   Body Electrical > Pre-Collision System > Clear DTCs 

2. Reproduce the detection conditions of the recorded DTC.

   HINT: 

   Refer to the flowchart for the detection conditions for each of the DTCs.

3. Recheck for DTCs.
   1. Attempt to duplicate the malfunction and 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 

GO TO SYMPTOM SIMULATION 

Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2018 - ]

Result: 

B 

GO TO DTC CHART 

Refer to DIAGNOSTIC TROUBLE CODE CHART [10/2022 - ] 

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

   Refer to PROBLEM SYMPTOMS TABLE [10/2022 - ] 

   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: 

B 

GO TO PROBLEM SYMPTOMS TABLE 

Refer to PROBLEM SYMPTOMS TABLE [10/2022 - ] 

Result: 

A 

See step  11

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  13

Result: 

A 

See step  12

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 [10/2022 - ]

1. Using the Techstream, check for DTCs (Confirmed).

   Body Electrical > Pre-Collision System > Trouble Codes 

2. Make a note of the output DTCs (Confirmed).

   Result

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

Result: 

B 

See step  15

Result: 

A 

See step  14

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

   Refer to FAIL-SAFE CHART [10/2022 - ] 

   Result

   Proceed to
   NEXT

Result: 

NEXT 

END 

1. 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.

   Refer to VEHICLE CONTROL HISTORY [10/2022 - ]

   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  17

Result: 

A 

See step  16

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

   Refer to PRECAUTION [10/2022 - ] 

   Result

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

Result: 

A 

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

Result: 

B 

See step  18

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

   Refer to VEHICLE CONTROL HISTORY [10/2022 - ]

   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.

1. Adjust the reflector height.

   Triangle Target: Refer to TARGET ADJUSTMENT(TRIANGLE TARGET) [12/2021 - ]

   Flat Surface Target: Refer to TARGET ADJUSTMENT(FLAT SURFACE TARGET) [12/2021 - ]

2. Place the reflector.

   Triangle Target: Refer to TARGET ADJUSTMENT(TRIANGLE TARGET) [12/2021 - ]

   Flat Surface Target: Refer to TARGET ADJUSTMENT(FLAT SURFACE TARGET) [12/2021 - ]

3. Using the Techstream, check the amount of misalignment.

   Body Electrical > Front Radar Sensor > Utility 

   Tester Display
   Front Beam Axis Misalignment Reading

   Standard

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

   Result

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

Result: 

A 

GO TO SYMPTOM SIMULATION 

Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2018 - ]

Result: 

B 

ADJUST MILLIMETER WAVE RADAR SENSOR ASSEMBLY 

Triangle Target: Refer to TARGET ADJUSTMENT(TRIANGLE TARGET) [12/2021 - ]

Flat Surface Target: Refer to TARGET ADJUSTMENT(FLAT SURFACE TARGET) [12/2021 - ]

Driving Adjustment: Refer to DRIVING ADJUSTMENT [12/2021 - ]