Problem Symptoms Table [08/2016 - ]

WARNING: This page is about a different car, the 2018 Toyota Corolla, 2017 Toyota Corolla, 2016 Toyota Corolla, 2015 Toyota Corolla, and 2014 Toyota Corolla. However, it is still accessible from the selected car via links, so may be relevant.

HINT:

Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
Inspect the fuses and relays related to this system before inspecting the suspected areas below.
The pre-collision system uses the CAN communication system. First, confirm that there are no malfunction in the CAN communication system. Refer to How to Proceed with Troubleshooting.

PRE-COLLISION SYSTEM

Symptom	Suspected Area	Link
"PRE-COLLISION SYSTEM UNAVAILABLE" is displayed 1 "Pre-Collision System Unavailable" is displayed 2	Perform millimeter wave radar sensor assembly adjustment	Refer to ADJUSTMENT [08/2016 - ]
	Millimeter wave radar sensor assembly temperature malfunction	Refer to DATA LIST / ACTIVE TEST [08/2016 - ]
	Millimeter wave radar sensor assembly low voltage malfunction	Refer to DATA LIST / ACTIVE TEST [08/2016 - ]
	Millimeter wave radar sensor assembly	Refer to REMOVAL [08/2016 - ]
	Combination meter assembly	Refer to REMOVAL [08/2016 - ]
	Driving support ECU assembly	Refer to REMOVAL [08/2016 - ]
"PRE-COLLISION SYSTEM UNAVAILABLE CLEAN SENSOR" is displayed 1 "Pre-Collision System Unavailable Clean Sensor" is displayed 2	Foreign matter attached to millimeter wave radar sensor assembly	-
	Millimeter wave radar sensor assembly	Refer to REMOVAL [08/2016 - ]
	Combination meter assembly	Refer to REMOVAL [08/2016 - ]
	Driving support ECU assembly	Refer to REMOVAL [08/2016 - ]
"FRONT CAMERA UNAVAILABLE" is displayed 1 "Front Camera System Unavailable" is displayed 2	Check current condition of forward recognition camera based on related Data List items. Abnormal forward recognition camera voltage Forward recognition camera temperature outside of operational range Other forward recognition camera malfunction	Refer to DATA LIST / ACTIVE TEST [08/2016 - 08/2017] Refer to DATA LIST / ACTIVE TEST [08/2017 - ]
	Forward recognition camera	Refer to REMOVAL [08/2016 - ]
	Combination meter assembly	Refer to REMOVAL [08/2016 - ]
	Driving support ECU assembly	Refer to REMOVAL [08/2016 - ]
"FRONT CAMERA UNAVAILABLE REMOVE DEBRIS ON WIND SHIELD" is displayed 1 "Front Camera Unavailable Remove Debris On Windshield" is displayed 2	Foreign matter attached to forward recognition camera or area of windshield in front of forward recognition camera	-
	Forward recognition camera	Refer to REMOVAL [08/2016 - ]
	Combination meter assembly	Refer to REMOVAL [08/2016 - ]
	Driving support ECU assembly	Refer to REMOVAL [08/2016 - ]
Although there is possibility of collision, pre-collision controls (all controls) do not operate ("Pre-collision System Unavailable" is not displayed)	Check if pre-collision system is canceled	-
	Vehicle condition/environment does not match the pre-collision system operation conditions (Confirm control operation conditions).	Refer to SYSTEM DESCRIPTION [08/2016 - ]
	Check installation condition of millimeter wave radar sensor assembly	Refer to INSTALLATION [08/2016 - ]
	Perform millimeter wave radar sensor assembly adjustment	Refer to ADJUSTMENT [08/2016 - ]
	Millimeter wave radar sensor assembly	Refer to REMOVAL [08/2016 - ]
	Check installation condition of forward recognition camera	Refer to INSTALLATION [08/2016 - ]
	Perform forward recognition camera adjustment	Refer to ADJUSTMENT (SEQUENTIAL RECOGNITION) [08/2016 - ]
	Forward recognition camera	Refer to REMOVAL [08/2016 - ]
	Driving support ECU assembly	Refer to REMOVAL [08/2016 - ]
Although there is no possibility of collision, pre-collision controls (all controls) operate	Vehicle condition/environment does not match the pre-collision system operation conditions (Confirm control operation conditions).	Refer to SYSTEM DESCRIPTION [08/2016 - ]
	Check installation condition of millimeter wave radar sensor assembly	Refer to INSTALLATION [08/2016 - ]
	Perform millimeter wave radar sensor assembly adjustment	Refer to ADJUSTMENT [08/2016 - ]
	Millimeter wave radar sensor assembly	Refer to REMOVAL [08/2016 - ]
	Check installation condition of forward recognition camera	Refer to INSTALLATION [08/2016 - ]
	Perform forward recognition camera adjustment	Refer to ADJUSTMENT (SEQUENTIAL RECOGNITION) [08/2016 - ]
	Forward recognition camera	Refer to REMOVAL [08/2016 - ]
	Driving support ECU assembly	Refer to REMOVAL [08/2016 - ]
Pre-collision system does not operate	Check if pre-collision system is canceled	-
	ECU power source circuit	Refer to ECU Power Source Circuit [08/2016 - ]
	Driving support ECU assembly	Refer to REMOVAL [08/2016 - ]
Pre-collision system cannot be canceled (PCS warning light does not illuminate)	Combination meter assembly (check if indicator illuminates using Active Test)	Refer to DATA LIST / ACTIVE TEST [08/2016 - ]
	Driving support ECU assembly	Refer to REMOVAL [08/2016 - ]
	Combination meter assembly	Refer to REMOVAL [08/2016 - ]

*1: for Dot LCD Type Multi-information Display

*2: for Color Type Multi-information Display