VEHICLE STABILITY CONTROL SYSTEM(for Hydraulic Brake Booster) PROBLEM SYMPTOMS TABLE
Tech Tips
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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.
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Inspect the fuses and relays related to this system before inspecting the suspected areas below.
Note
When replacing the master cylinder or sensor, turn the ignition switch off.
| Symptom | Suspected Area | See page |
|---|---|---|
| ABS, BA and/or EBD does not operate | Check for DTCs again and make sure that no DTC is output | |
| IG power source circuit | ||
| Front speed sensor circuit | ||
| Rear speed sensor circuit | ||
| Master cylinder pressure sensor (check master cylinder pressure sensor by performing test mode inspection) | ||
| Check hydraulic brake booster with GTS. If abnormal, check hydraulic circuit for leakage. (for LHD) | ||
| Check hydraulic brake booster with GTS. If abnormal, check hydraulic circuit for leakage. (for RHD) | ||
| If symptoms still occur even after above circuits in suspected areas are inspected and proved to be normal, replace master cylinder solenoid (for LHD) | ||
| If symptoms still occur even after above circuits in suspected areas are inspected and proved to be normal, replace master cylinder solenoid (for RHD) | ||
| ABS, BA and/or EBD does not operate efficiently | Check for DTCs again and make sure that no DTC is output | |
| Front speed sensor circuit | ||
| Rear speed sensor circuit | ||
| Stop light switch circuit | ||
| Master cylinder pressure sensor (check master cylinder pressure sensor by performing test mode inspection) | ||
| Check hydraulic brake booster with GTS. If abnormal, check hydraulic circuit for leakage. (for LHD) | ||
| Check hydraulic brake booster with GTS. If abnormal, check hydraulic circuit for leakage. (for RHD) | ||
| If symptoms still occur even after above circuits in suspected areas are inspected and proved to be normal, replace master cylinder solenoid (for LHD) | ||
| If symptoms still occur even after above circuits in suspected areas are inspected and proved to be normal, replace master cylinder solenoid (for RHD) | ||
| VSC and/or TRC does not operate | Check for DTCs again and make sure that no DTC is output | |
| IG power source circuit | ||
| Front speed sensor circuit | ||
| Rear speed sensor circuit | ||
| Yaw rate and acceleration sensor (airbag sensor assembly) circuit | ||
| Steering angle sensor circuit | ||
| If symptoms still occur even after above circuits in suspected areas are inspected and proved to be normal, replace master cylinder solenoid (for LHD) | ||
| If symptoms still occur even after above circuits in suspected areas are inspected and proved to be normal, replace master cylinder solenoid (for RHD) | ||
| Sensor and switch signal check cannot be performed | Skid control ECU (master cylinder solenoid) (for LHD) | |
| Skid control ECU (master cylinder solenoid) (for RHD) | ||
| DTC check cannot be performed | Check for DTCs again and make sure that no DTC is output | |
| IG power source circuit (high power supply voltage malfunction) | ||
| If the symptoms still occur even after the above circuits in suspected areas are inspected and proved to be normal, replace the master cylinder solenoid (for LHD) | ||
| If the symptoms still occur even after the above circuits in suspected areas are inspected and proved to be normal, replace the master cylinder solenoid (for RHD) | ||
| ABS warning light abnormal (Remains on) | ABS warning light circuit | |
| IG power source circuit (high power supply voltage malfunction) | ||
| Skid control ECU (master cylinder solenoid) (for LHD) | ||
| Skid control ECU (master cylinder solenoid) (for RHD) | ||
| ABS warning light abnormal (Does not come on) | ABS warning light circuit | |
| Skid control ECU (master cylinder solenoid) (for LHD) | ||
| Skid control ECU (master cylinder solenoid) (for RHD) | ||
| Brake warning light abnormal (Remains on) | Brake warning light circuit | |
| IG power source circuit (high power supply voltage malfunction) | ||
| Skid control ECU (master cylinder solenoid) (for LHD) | ||
| Skid control ECU (master cylinder solenoid) (for RHD) | ||
| Brake warning light abnormal (Does not come on) | Brake warning light circuit | |
| Skid control ECU (master cylinder solenoid) (for LHD) | ||
| Skid control ECU (master cylinder solenoid) (for RHD) | ||
| Slip indicator light abnormal (Remains on) | Slip indicator light circuit | |
| IG power source circuit (high power supply voltage malfunction) | ||
| Skid control ECU (master cylinder solenoid) (for LHD) | ||
| Skid control ECU (master cylinder solenoid) (for RHD) | ||
| Slip indicator light abnormal (Does not come on) | Slip indicator light circuit | |
| Skid control ECU (master cylinder solenoid) (for LHD) | ||
| Skid control ECU (master cylinder solenoid) (for RHD) | ||
| VSC OFF indicator light abnormal (Remains on) | VSC OFF indicator light circuit | |
| Skid control ECU (master cylinder solenoid) (for LHD) | ||
| Skid control ECU (master cylinder solenoid) (for RHD) | ||
| VSC OFF indicator light abnormal (Does not come on) | VSC OFF indicator light circuit | |
| Skid control ECU (master cylinder solenoid) (for LHD) | ||
| Skid control ECU (master cylinder solenoid) (for RHD) | ||
| Buzzer abnormal | VSC buzzer circuit | |
| TRC OFF indicator abnormal (Remains on) | TRC OFF indicator light circuit | |
| Skid control ECU (master cylinder solenoid) (for LHD) | ||
| Skid control ECU (master cylinder solenoid) (for RHD) | ||
| TRC OFF indicator abnormal (Does not come on) | TRC OFF indicator light circuit | |
| Skid control ECU (master cylinder solenoid) (for LHD) | ||
| Skid control ECU (master cylinder solenoid) (for RHD) | ||
| Crawl indicator light abnormal (Remains on) | Crawl indicator light circuit | |
| Skid control ECU (master cylinder solenoid) (for LHD) | ||
| Skid control ECU (master cylinder solenoid) (for RHD) | ||
| Crawl indicator light abnormal (Does not come on) | Crawl indicator light circuit | |
| Skid control ECU (master cylinder solenoid) (for LHD) | ||
| Skid control ECU (master cylinder solenoid) (for RHD) | ||
| Multi-terrain select indicator light abnormal (Remains on) | Multi-terrain select indicator light circuit | |
| Multi-terrain select indicator light abnormal (Does not come on) | Multi-terrain select indicator light circuit | |
| Downhill assist control indicator light abnormal (Remains on) | Downhill assist control indicator light circuit | |
| Skid control ECU (master cylinder solenoid) (for LHD) | ||
| Skid control ECU (master cylinder solenoid) (for RHD) | ||
| Downhill assist control indicator light abnormal (Does not come on) | Downhill assist control indicator light circuit | |
| Skid control ECU (master cylinder solenoid) (for LHD) | ||
| Skid control ECU (master cylinder solenoid) (for RHD) |