Problem Symptoms Table
HINT:
Use the table below to help determine the cause of the problem symptom. 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.
Electronically controlled brake system
PROBLEM SYMPTOMS CHART
| Symptom | Suspected area | See |
|---|---|---|
| ABS does not operate, BA does not operate, EBD does not operate | 1. Check the DTC again and make sure that the normal code is output. | DTC CHECK / CLEAR |
| 2. IG power source circuit and ground circuit | DTC C1241/41 LOW BATTERY POSITIVE VOLTAGE OR ABNORMALLY HIGH BATTERY POSITIVE VOLTAGE; DTC C1242/42 OPEN IN IG1 / IG2 POWER SOURCE CIRCUIT | |
| 3. Front speed sensor circuit | DTC C0200/31 FRONT SPEED SENSOR RH CIRCUIT; DTC C0205/32 FRONT SPEED SENSOR LH CIRCUIT; DTC C1271/71 LOW OUTPUT SIGNAL OF FRONT SPEED SENSOR RH (TEST MODE DTC); DTC C1272/72 LOW OUTPUT SIGNAL OF FRONT SPEED SENSOR LH (TEST MODE DTC) | |
| 4. Rear speed sensor circuit | DTC C0210/33 REAR SPEED SENSOR RH CIRCUIT; DTC C0215/34 REAR SPEED SENSOR LH CIRCUIT; DTC C1273/73 LOW OUTPUT SIGNAL OF REAR SPEED SENSOR RH (TEST MODE DTC); DTC C1274/74 LOW OUTPUT SIGNAL OF REAR SPEED SENSOR LH (TEST MODE DTC) | |
| 5. Check the brake actuator with an intelligent tester (with CAN VIM). (Check brake actuator operation using the ACTIVE TEST (Check brake actuator operation using the ACTIVE TEST function.) If abnormal, check the hydraulic circuit for leakage. | ON-VEHICLE INSPECTION | |
| 6. If the symptoms still occur even after the above suspected areas are inspected and proved to be normal, replace the skid control ECU. | - | |
| ABS does not operate efficiently, BA does not operate efficiently, EBD does not operate efficiently | 1. Check the DTC again and make sure that the normal code is output. | DTC CHECK / CLEAR |
| 2. Front speed sensor circuit | DTC C0200/31 FRONT SPEED SENSOR RH CIRCUIT; DTC C0205/32 FRONT SPEED SENSOR LH CIRCUIT; DTC C1271/71 LOW OUTPUT SIGNAL OF FRONT SPEED SENSOR RH (TEST MODE DTC); DTC C1272/72 LOW OUTPUT SIGNAL OF FRONT SPEED SENSOR LH (TEST MODE DTC) | |
| 3. Rear speed sensor circuit | DTC C0210/33 REAR SPEED SENSOR RH CIRCUIT; DTC C0215/34 REAR SPEED SENSOR LH CIRCUIT; DTC C1273/73 LOW OUTPUT SIGNAL OF REAR SPEED SENSOR RH (TEST MODE DTC); DTC C1274/74 LOW OUTPUT SIGNAL OF REAR SPEED SENSOR LH (TEST MODE DTC) | |
| 4. Stop light switch circuit | DTC C1249/49 OPEN IN STOP LIGHT SWITCH CIRCUIT | |
| 5. Check the brake actuator with an intelligent tester. If abnormal, check the hydraulic circuit for leakage. | ON-VEHICLE INSPECTION | |
| 6. If the symptoms still occur even after the above suspected areas are inspected and proved to be normal, replace the skid control ECU. | - | |
| ABS warning light abnormal (Remains on) | 1. ABS warning light circuit | ABS WARNING LIGHT REMAINS ON |
| 2. Skid control ECU | - | |
| ABS warning light abnormal (Does not come on) | 1. ABS warning light circuit | ABS WARNING LIGHT DOES NOT COME ON |
| 2. Skid control ECU | - | |
| DTC of ABS check cannot be done | 1. Check the DTC again and make sure that the normal code is output. | DTC CHECK / CLEAR |
| 2. TC and CG terminal circuit | TC AND CG TERMINAL CIRCUIT | |
| 3. If the symptoms still occur even after the above suspected areas are inspected and proved to be normal, replace the skid control ECU. | - | |
| Sensor signal check cannot be done | 1. TS and CG terminal circuit | TS AND CG TERMINAL CIRCUIT |
| 2. Skid control ECU | - | |
| VSC does not operate | 1. Check the DTC again and make sure that the normal code is output. | DTC CHECK / CLEAR |
| 2. IG power source circuit and ground circuit | DTC C1235/35 FOREIGN OBJECT IS ATTACHED ON TIP OF FRONT SPEED SENSOR RH; DTC C1236/36 FOREIGN OBJECT IS ATTACHED ON TIP OF FRONT SPEED SENSOR LH; DTC C1238/38 FOREIGN OBJECT IS ATTACHED ON TIP OF REAR SPEED SENSOR RH; DTC C1239/39 FOREIGN OBJECT IS ATTACHED ON TIP OF REAR SPEED SENSOR LH; DTC C1275/75 ABNORMAL CHANGE IN OUTPUT SIGNAL OF FRONT SPEED SENSOR RH (TEST MODE DTC); DTC C1276/76 ABNORMAL CHANGE IN OUTPUT SIGNAL OF FRONT SPEED SENSOR LH (TEST MODE DTC); DTC C1277/77 ABNORMAL CHANGE IN OUTPUT SIGNAL OF REAR SPEED SENSOR RH (TEST MODE DTC); DTC C1278/78 ABNORMAL CHANGE IN OUTPUT SIGNAL OF REAR SPEED SENSOR LH (TEST MODE DTC) | |
| 3. Check the hydraulic circuit for leakage. | - | |
| 4. Front speed sensor circuit | DTC C0200/31 FRONT SPEED SENSOR RH CIRCUIT; DTC C0205/32 FRONT SPEED SENSOR LH CIRCUIT; DTC C1271/71 LOW OUTPUT SIGNAL OF FRONT SPEED SENSOR RH (TEST MODE DTC); DTC C1272/72 LOW OUTPUT SIGNAL OF FRONT SPEED SENSOR LH (TEST MODE DTC) | |
| 5. Rear speed sensor circuit | DTC C0210/33 REAR SPEED SENSOR RH CIRCUIT; DTC C0215/34 REAR SPEED SENSOR LH CIRCUIT; DTC C1273/73 LOW OUTPUT SIGNAL OF REAR SPEED SENSOR RH (TEST MODE DTC); DTC C1274/74 LOW OUTPUT SIGNAL OF REAR SPEED SENSOR LH (TEST MODE DTC) | |
| 6. Yaw rate / Deceleration sensor circuit | DTC C1210/36 ZERO POINT CALIBRATION OF YAW RATE SENSOR UNDONE; DTC C0371/71 YAW RATE SENSOR (TEST MODE DTC); DTC C1232/32 STUCK IN ACCELERATION SENSOR; DTC C1234/34 YAW RATE SENSOR MALFUNCTION; DTC C1243/43 ACCELERATION SENSOR STUCK MALFUNCTION; DTC C1244/44 OPEN OR SHORT IN ACCELERATION SENSOR CIRCUIT; DTC C1245/45 ACCELERATION SENSOR OUTPUT MALFUNCTION; DTC C1279/79 ACCELERATION SENSOR OUTPUT VOLTAGE MALFUNCTION (TEST MODE DTC); DTC C1336/39 ZERO POINT CALIBRATION OF ACCELERATION SENSOR UNDONE; DTC C1381/97 YAW RATE AND / OR ACCELERATION SENSOR POWER SUPPLY VOLTAGE MALFUNCTION | |
| 7. Steering sensor circuit | DTC C1231/31 Steering Angle Sensor Circuit Malfunction | |
| 8. If the symptoms still occur even after the above suspected areas are inspected and proved to be normal, replace the skid control ECU. | - | |
| SLIP indicator light abnormal | 1. SLIP indicator light circuit | SLIP INDICATOR LIGHT CIRCUIT |
| 2. Skid control ECU | - | |
| DTC of VSC check cannot be done | 1. Check the DTC again and make sure that the normal code is output. | DTC CHECK / CLEAR |
| 2. TC terminal circuit | TC AND CG TERMINAL CIRCUIT | |
| 3. If the symptoms still occur even after the above suspected areas are inspected and proved to be normal, replace the skid control ECU. | - | |
| VSC warning light abnormal (Remains on) | 1. Check the DTC again and make sure that the normal code is output. | DTC CHECK / CLEAR |
| 2. VSC warning circuit | VSC WARNING LIGHT REMAINS ON | |
| 3. If the symptoms still occur even after the above suspected areas are inspected and proved to be normal, replace the skid control ECU. | - | |
| VSC warning light abnormal (Does not come on) | 1. Check the DTC again and make sure that the normal code is output. | DTC CHECK / CLEAR |
| 2. VSC warning circuit | VSC WARNING LIGHT DOES NOT COME ON | |
| 3. If the symptoms still occur even after the above suspected areas are inspected and proved to be normal, replace the skid control ECU. | - | |
| Brake Control warning light abnormal (Remains on) | 1. Check the DTC again and make sure that the normal code is output. | DTC CHECK / CLEAR |
| 2. Brake Control warning circuit | BRAKE CONTROL WARNING LIGHT REMAINS ON | |
| 3. If the symptoms still occur even after the above suspected areas are inspected and proved to be normal, replace the skid control ECU. | - | |
| Brake Control warning light abnormal (Does not come on) | 1. Check the DTC again and make sure that the normal code is output. | DTC CHECK / CLEAR |
| 2. Brake Control warning circuit | BRAKE CONTROL WARNING LIGHT DOES NOT COME ON | |
| 3. If the symptoms still occur even after the above suspected areas are inspected and proved to be normal, replace the skid control ECU. | - |