VEHICLE STABILITY CONTROL SYSTEM PROBLEM SYMPTOMS TABLE
If there are no DTCs output and the problem still occurs, check the suspected areas for each problem symptom in the order given in the following table and proceed to the relevant troubleshooting page.
Note
When replacing the skid control ECU (brake actuator assembly), sensors, etc., turn the ignition switch off.
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.
| Symptom | Suspected Area | Link |
|---|---|---|
| ABS, BA and/or EBD does not operate | Check again to see if DTCs are output. (If DTCs are output, perform diagnosis based on the DTCs that are output.) | |
| Power source circuit (low power supply voltage malfunction) | ||
| Power source circuit (high power supply voltage malfunction) | ||
| Front speed sensor circuit | ||
| Rear speed sensor circuit | Click here | |
| Check the brake actuator assembly using the GTS. (Check brake actuator assembly operation using the Active Test function.) If abnormal, check the hydraulic circuit for leaks. | ||
| If the symptoms still occur even after the above suspected areas have been inspected and proved to be normal, replace the skid control ECU (Brake actuator assembly). | ||
| ABS, BA and/or EBD does not operate efficiently | Check for DTCs again and make sure that DTCs are not output. | |
| Front speed sensor circuit | ||
| Rear speed sensor circuit | ||
| Stop light switch circuit (on stuck malfunction) | Click here | |
| Stop light switch circuit (open malfunction) | Click here | |
| Stop light switch circuit (off stuck malfunction) | ||
| Check the brake actuator assembly using the GTS. (Check brake actuator assembly operation using the Active Test function.) If abnormal, check the hydraulic circuit for leaks. | ||
| If the symptoms still occur even after the above suspected areas have been inspected and proved to be normal, replace the skid control ECU (Brake actuator assembly). | ||
| ABS sensor DTC check cannot be done | Check again to see if DTCs are output. (If DTCs are output, perform diagnosis based on the DTCs that are output.) | |
| TC and CG terminal circuit | ||
| If the symptoms still occur even after the above suspected areas have been inspected and proved to be normal, replace the skid control ECU (Brake actuator assembly). | ||
| ABS warning light abnormal (Remains on) | ABS warning light circuit | |
| Skid control ECU (Brake actuator assembly) | ||
| ABS warning light abnormal (Does not come on) | ABS warning light circuit | |
| Skid control ECU (Brake actuator assembly) | ||
| Brake warning light abnormal (Remains on) | Brake warning light circuit | |
| Skid control ECU (Brake actuator assembly) | ||
| Brake warning light abnormal (Does not come on) | Brake warning light circuit | |
| Skid control ECU (Brake actuator assembly) | ||
| VSC and/or TRC does not operate | Check again to see if DTCs are output. (If DTCs are output, perform diagnosis based on the DTCs that are output.) | |
| Check system variant learning. | ||
| Check the engine control system. | ||
| Power source circuit (low power supply voltage malfunction) | ||
| Power source circuit (high power supply voltage malfunction) | ||
| Check the hydraulic circuit for leaks. | - | |
| Front speed sensor circuit | ||
| Rear speed sensor circuit | ||
| Yaw rate and acceleration sensor circuit (sensor malfunction) | ||
| Yaw rate and acceleration sensor circuit (power supply voltage malfunction) | ||
| Acceleration sensor circuit (comparison malfunction) | ||
| Yaw rate sensor circuit (comparison malfunction) | ||
| Yaw rate and acceleration sensor circuit (internal malfunction) | ||
| Steering angle sensor circuit (output malfunction) | ||
| Steering angle sensor circuit (power source voltage malfunction) | ||
| Steering angle sensor circuit (internal malfunction) | ||
| Replace the ECM. (for 1WW) | ||
| Replace the ECM. (for 8NR-FTS) | ||
| Replace the ECM. (for 1ND-TV (w/ Glow Plug Controller)) | ||
| Replace the ECM. (for 1ND-TV (w/ Glow Plug Controller)) | ||
| Replace the ECM. (for 1NR-FE) | ||
| Replace the ECM. (for 1ZR-FAE) | ||
| Replace the ECM. (for 1ZR-FE) | ||
| Replace the ECM. (for 2ZR-FE) | ||
| If the symptoms still occur even after the above suspected areas have been inspected and proved to be normal, replace the skid control ECU (Brake actuator assembly). | ||
| VSC sensor DTC check cannot be done | Check again to see if DTCs are output. (If DTCs are output, perform diagnosis based on the DTCs that are output.) | |
| TC and CG terminal circuit | ||
| If the symptoms still occur even after the above suspected areas have been inspected and proved to be normal, replace the skid control ECU (Brake actuator assembly). | ||
| TRC OFF indicator light abnormal (Reminds on)*1. Multi-information display (TRC OFF message) abnormal (Remains on)*2. |
TRC OFF indicator light circuit | |
| Skid control ECU (Brake actuator assembly) | ||
| TRC OFF indicator light abnormal (Does not come on)*1. Multi-information display (TRC OFF message) abnormal (Does not come on)*2. |
TRC OFF indicator light circuit | |
| Skid control ECU (Brake actuator assembly) | ||
| VSC OFF indicator light abnormal (Reminds on) | VSC OFF indicator light circuit | |
| Skid control ECU (Brake actuator assembly) | ||
| VSC OFF indicator light abnormal (Does not come on) | VSC OFF indicator light circuit | |
| Skid control ECU (Brake actuator assembly) | ||
| Slip indicator light abnormal (Remains on) | Slip indicator light circuit | |
| Skid control ECU (Brake actuator assembly) | ||
| Slip indicator light abnormal (Does not come on) | Slip indicator light circuit | Click here |
| Skid control ECU (Brake actuator assembly) | ||
| Sensor check cannot be done | TS and CG terminal circuit | Click here |
| Skid control ECU (Brake actuator assembly) |
*1: except Multi-information Display (Color Type)
*2: for Multi-information Display (Color Type)