Problem Symptoms Table [10/2014 - 09/2017]

NOTE:

When replacing the combination meter assembly, make sure to replace it with a new one.
When replacing the driving support ECU assembly, always replace it with a new one. If a driving support ECU assembly which was installed to another vehicle is used, the information stored in the driving support ECU assembly will not match the information from the vehicle. As a result, a DTC may be stored.
When the millimeter wave radar sensor assembly is replaced with a new one, adjustment of the radar sensor beam axis must be performed.
Refer to ADJUSTMENT [10/2014 - 09/2017]

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.

PRE-COLLISION SYSTEM

Symptom	Suspected Area	Link
"Pre-collision System Malfunction Visit Your Dealer" is displayed	Driving support ECU assembly	Refer to REMOVAL [10/2014 - 09/2017]
	Combination meter assembly	Refer to REMOVAL [10/2014 - 09/2017]
"Pre-collision System Unavailable" is displayed	System determines that obstacles cannot be detected due to millimeter wave radar sensor assembly or radiator grille being dirty. If dirt is removed, normal control returns (dirt history can be checked using Data List).	-
	System determines that millimeter wave radar sensor assembly cannot detect obstacles due to bad weather. If weather recovers, normal control returns (bad weather history can be checked using Data List).	-
	Millimeter wave radar sensor assembly	Refer to REMOVAL [10/2014 - 09/2017]
	Combination meter assembly	Refer to REMOVAL [10/2014 - 09/2017]
	Driving support ECU assembly	Refer to REMOVAL [10/2014 - 09/2017]
Although there is possibility of collision, pre-collision control (all front collision controls) does not operate ("pre-collision system Unavailable" is not displayed)	Vehicle condition/environment does not match pre-collision control operation conditions (Confirm control operation conditions)	Refer to SYSTEM DESCRIPTION [10/2014 - 09/2017]
	Pre-collision system circuit	Refer to Pre-collision System Circuit [10/2014 - 09/2017]
	Check installation condition of millimeter wave radar sensor assembly	Refer to INSTALLATION [10/2014 - 09/2017]
	Perform millimeter wave radar sensor assembly adjustment	Refer to ADJUSTMENT [10/2014 - 09/2017]
	Millimeter wave radar sensor assembly	Refer to REMOVAL [10/2014 - 09/2017]
	Driving support ECU assembly	Refer to REMOVAL [10/2014 - 09/2017]
Although there is no possibility of collision, pre-collision controls (all front crash controls) operate	Vehicle condition/environment match pre-collision control operation conditions (Confirm control operation conditions)	Refer to SYSTEM DESCRIPTION [10/2014 - 09/2017]
	Pre-collision system circuit	Refer to Pre-collision System Circuit [10/2014 - 09/2017]
	Check installation condition of millimeter wave radar sensor assembly	Refer to INSTALLATION [10/2014 - 09/2017]
	Perform millimeter wave radar sensor assembly adjustment	Refer to ADJUSTMENT [10/2014 - 09/2017]
	Millimeter wave radar sensor assembly	Refer to REMOVAL [10/2014 - 09/2017]
	Driving support ECU assembly	Refer to REMOVAL [10/2014 - 09/2017]
Pre-collision system cannot be canceled (PCS warning indicator does not illuminate)	Check condition of No. 2 combination switch assembly (pre-collision system switch)	Refer to SYSTEM DESCRIPTION [10/2014 - 09/2017]
	Combination meter assembly (Check if indicator illuminates using Active Test)	Refer to DATA LIST / ACTIVE TEST [10/2014 - 09/2017]
	Pre-collision system switch circuit	Refer to Pre-collision System Switch Circuit [10/2014 - 09/2017]
	Driving support ECU assembly	Refer to REMOVAL [10/2014 - 09/2017]
Pre-collision brake assist and pre-collision brake control cannot be canceled (PCS warning indicator does not illuminate)	Check condition of integration control and panel assembly (VSC OFF switch)	Refer to SYSTEM DESCRIPTION [10/2014 - 09/2017]
	Combination meter assembly (Check if indicator illuminates using Active Test)	Refer to DATA LIST / ACTIVE TEST [10/2014 - 09/2017]
	Electronically controlled brake system	Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2014 - 05/2019]
	Driving support ECU assembly	Refer to REMOVAL [10/2014 - 09/2017]
Pre-collision system sensitivity cannot be changed (multi-information display sensitivity setting screen does not display)	Check condition of No. 2 combination switch assembly (pre-collision system switch)	Refer to SYSTEM DESCRIPTION [10/2014 - 09/2017]
	Pre-collision system switch circuit	Refer to Pre-collision System Switch Circuit [10/2014 - 09/2017]
	Combination meter assembly	Refer to REMOVAL [10/2014 - 09/2017]
	Driving support ECU assembly	Refer to REMOVAL [10/2014 - 09/2017]