PRE-CRASH SAFETY SYSTEM > PROBLEM SYMPTOMS TABLE

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HINT:
  1. 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.
  2. Inspect the fuses and relays related to this system before inspecting the suspected areas below.


Pre-Crash System 
Symptom
Suspected Area
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"CHECK PCS SYSTEM" is displayed
CAN communication system
-
Combination meter
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Seat belt control ECU
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Driving support ECU
 Click here
"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.)
 Click here
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
 Click here
Although there is possibility of crash, pre-crash control (all front crash 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)
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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 crash, pre-crash control (all front crash controls) operates
Vehicle condition/environment does not match pre-crash control operation conditions (Confirm control operation conditions)
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Check installation condition of millimeter wave radar sensor
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Perform millimeter wave radar sensor adjustment
 Click here
Millimeter wave radar sensor
 Click here
Driving support ECU
 Click here
Neither normal system code nor DTC is output
Power source circuit
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Seat belt control ECU
 Click here
System does not operate normally even when normal system code is output and DTCs are not output
Power source circuit
 Click here
Seat belt control ECU
 Click here
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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Only pre-crash brake does not operate*
Pre-crash brake cancel switch assembly
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Pre-crash brake cancel switch circuit
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Driving support ECU
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*: w/ Pre-crash Brake