PRE-CRASH SAFETY SYSTEM PROBLEM SYMPTOMS TABLE

Tech Tips

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-crash System
Symptom Suspected Area See page
"Check PCS System" is displayed Seat belt control ECU

Click here

Combination meter assembly

Click here

"PCS not available now" is displayed System determines that obstacles cannot be detected due to front millimeter wave radar sensor or radiator grille being dirty. If dirt is removed, normal control returns (dirt history can be checked using Data List). -
System determines that obstacles cannot be detected due to rear millimeter wave radar sensor or rear bumper cover being dirty. If dirt is removed, normal control returns (dirt history can be checked using Data List). -
System determines that obstacles cannot be detected due to object recognition camera or front glass being dirty. If dirt is removed, normal control returns. -
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). -
When seat belt is retracted 5 times, overheating prevention fail-safe function of seat belt control ECU operates. If ECU temperature drops, normal control returns.

Click here

Millimeter wave radar sensor assembly

Click here

Seat belt control ECU

Click here

Driving support ECU

Click here

Object recognition camera sensor

Click here

Driver monitor camera

Click here

Although there is possibility of collision, pre-crash control (all front collision controls) does not operate ("PCS not available now" is not displayed) Vehicle condition/environment does not match pre-crash control operation conditions (confirm control operation conditions) -
Check installation condition of millimeter wave radar sensor

Click here

Perform millimeter wave radar sensor adjustment

Click here

Millimeter wave radar sensor assembly

Click here

Driving support ECU

Click here

Although there is no possibility of collision, pre-crash control (all front collision controls) operates Check installation condition of millimeter wave radar sensor

Click here

Perform millimeter wave radar sensor adjustment

Click here

Millimeter wave radar sensor assembly

Click here

Driving support ECU

Click here

Although there is possibility of collision, pre-crash control (all rear collision controls) does not operate ("PCS not available now" is not displayed) Vehicle condition/environment does not match pre-crash control operation conditions (confirm control operation conditions) -
Check installation condition of rear millimeter wave radar sensor

Click here

Perform rear millimeter wave radar sensor adjustment

Click here

Rear millimeter wave radar sensor assembly

Click here

Driving support ECU

Click here

Although there is no possibility of collision, pre-crash control (all rear collision controls) operates Driving condition/environment matches pre-crash control operation conditions (confirm rear millimeter wave radar sensor precautions) -
Check installation condition of rear millimeter wave radar sensor

Click here

Perform rear millimeter wave radar sensor adjustment

Click here

Rear millimeter wave radar sensor assembly

Click here

Driving support ECU

Click here

Only pre-crash seat belt does not operate Buckle switch error (malfunction in which DTC is not output, such as when buckle switch is stuck ON or OFF) -
Seat belt control ECU

Click here

Only rear-end collision prevention alarm control does not operate Hazard warning light circuit

Click here

Main body ECU -
Driving support ECU

Click here

Pre-crash brake cannot be canceled (pre-crash warning indicator does not blink) Combination meter assembly (check if indicator illuminates using Active Test)

Click here

Inspect VSC off switch -
Inspect pre-crash brake cancel switch

Click here

Wire harness between pre-crash brake cancel switch and driving support ECU -
Driving support ECU

Click here