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.

  • Inspect the fuses and relays related to this system before inspecting the suspected areas below.

Pre-Crash Safety System
Symptom Suspected Area See page
"CHECK PCS SYSTEM" is displayed Combination meter

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Driving support ECU

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"PCS TEMPORARILY NOT AVAILABLE" is displayed System determines wave radar sensor cannot detect obstacles due to bad weather. If weather recovers, normal control returns. (Bad weather history can be checked using Data List.) -
Overheating protection fail-safe of seat belt control ECU operates. If ECU temperature drops, normal control returns. -
Millimeter wave radar sensor

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Seat belt control ECU

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Driving support ECU

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Although there is possibility of collision, pre-crash control (all front collision controls) do not operate ("PCS TEMPORARILY NOT AVAILABLE" 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

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Perform millimeter wave radar sensor adjustment

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Millimeter wave radar sensor

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Driving support ECU

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

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Perform millimeter wave radar sensor adjustment

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Millimeter wave radar sensor

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Driving support ECU

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Neither normal system code nor DTC is output Power source circuit

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Seat belt control ECU

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System does not operate normally even when normal system code is output and DTCs are not output Power source circuit

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Seat belt control ECU

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Pre-crash brake cannot be canceled Pre-crash brake cancel switch

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Pre-crash safety brake cancel switch circuit

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Driving support ECU

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Skid control ECU assembly

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Only pre-crash seat belt does not operate Buckle switch error (malfunction in which DTC is not output) -
Seat belt control ECU

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