Problem Symptoms Table [08/2013 - ]
WARNING: This page is about a different car, the 2014 Lexus ES 300h. 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.
PRE-COLLISION SYSTEM
| Symptom | Suspected Area | See |
|---|---|---|
| "CHECK PCS SYSTEM" is displayed | Combination meter assembly | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2013 - ] |
| Seat belt control ECU | Refer to COMPONENTS [08/2013 - ] | |
| Driving support ECU assembly | Refer to COMPONENTS [08/2013 - ] | |
| "PCS TEMPORARILY NOT AVAILABLE" is displayed | System determines 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.) | Refer to SYSTEM DESCRIPTION [08/2013 - ] |
| Overheating protection fail-safe of seat belt control ECU operates. If seat belt motor temperature drops, normal control returns. | - | |
| Millimeter wave radar sensor assembly | Refer to COMPONENTS [08/2013 - ] | |
| Seat belt control ECU | Refer to COMPONENTS [08/2013 - ] | |
| Driving support ECU assembly | Refer to COMPONENTS [08/2013 - ] | |
| Although there is possibility of collision, pre-collision controls (all front crash controls) do not operate ("PCS TEMPORARILY NOT AVAILABLE" is not displayed) | Vehicle condition/environment does not match pre-collision control operation conditions (Confirm control operation conditions) | Refer to SYSTEM DESCRIPTION [08/2013 - ] |
| Check installation condition of millimeter wave radar sensor assembly | Refer to INSTALLATION [08/2013 - ] | |
| Perform millimeter wave radar sensor assembly adjustment | Refer to ADJUSTMENT [08/2013 - ] | |
| Millimeter wave radar sensor assembly | Refer to COMPONENTS [08/2013 - ] | |
| Seat belt control ECU | Refer to COMPONENTS [08/2013 - ] | |
| Driving support ECU assembly | Refer to COMPONENTS [08/2013 - ] | |
| Although there is no possibility of collision, pre-collision controls (all front crash controls) operate | Vehicle condition/environment does not match pre-collision control operation conditions (Confirm control operation conditions) | Refer to SYSTEM DESCRIPTION [08/2013 - ] |
| Check installation condition of millimeter wave radar sensor assembly | Refer to INSTALLATION [08/2013 - ] | |
| Perform millimeter wave radar sensor assembly adjustment | Refer to ADJUSTMENT [08/2013 - ] | |
| Millimeter wave radar sensor assembly | Refer to COMPONENTS [08/2013 - ] | |
| Seat belt control ECU | Refer to COMPONENTS [08/2013 - ] | |
| Driving support ECU assembly | Refer to COMPONENTS [08/2013 - ] | |
| Neither normal system code nor DTC is output | Power source circuit | Refer to Power Source Circuit [08/2013 - ] |
| Seat belt control ECU | Refer to COMPONENTS [08/2013 - ] | |
| Driving support ECU assembly | Refer to COMPONENTS [08/2013 - ] | |
| System does not operate normally even when normal system code is output or DTCs are not output | Power source circuit | Refer to Power Source Circuit [08/2013 - ] |
| Seat belt control ECU | Refer to COMPONENTS [08/2013 - ] | |
| Driving support ECU assembly | Refer to COMPONENTS [08/2013 - ] | |
| Only pre-collision seat belt does not operate | Buckle switch error (malfunction in which DTC is not output) | - |
| Seat belt control ECU | Refer to COMPONENTS [08/2013 - ] | |
| Pre-collision system does not operate | Pre-collision system cancel switch assembly | Refer to INSPECTION [08/2013 - ] |
| Pre-collision system cancel switch circuit | Refer to Pre-collision System Cancel Switch Circuit [08/2013 - ] | |
| Driving support ECU assembly | Refer to COMPONENTS [08/2013 - ] | |
| Pre-collision system cannot be canceled (PCS warning indicator does not illuminate) | Combination meter assembly (check if indicator illuminates using Active Test) | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2013 - ] |
| Pre-collision system cancel switch circuit | Refer to Pre-collision System Cancel Switch Circuit [08/2013 - ] | |
| Driving support ECU assembly | Refer to COMPONENTS [08/2013 - ] | |
| Combination meter assembly | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2013 - ] |