Symptom Diagnosis
If a normal DTC is displayed during DTC check but problem still occurs, check circuits for each problem symptom in order given in appropriate SYMPTOM DIAGNOSIS table, then see specified procedure or appropriate test under CIRCUIT TESTS or DIAGNOSTIC TESTS . Check actuator operation, see ACTUATOR CHECK under DIAGNOSIS & TESTING.
SYMPTOM DIAGNOSIS
| Symptom | Circuit | Circuit, DTC Or Procedure | ||
|---|---|---|---|---|
| ABS Does Not Operate (1) | 1. Check DTC, Confirm Normal Code Is Output | RETRIEVING DIAGNOSTIC TROUBLE CODES | ||
| *** | 2. Power Source Circuit | DTC 41 | ||
| *** | 3. Speed Sensor Circuit | DTC 31, 32, 33 & 34 | ||
| *** | 4. Check Hydraulic Brake Booster | HYDRAULIC BRAKE BOOSTER | ||
| *** | 5. Check For Hydraulic Leakage | Visual Inspection | ||
| ABS Does Not Operate Efficiently(1) | 1. Check DTC, Confirm Normal Code Is Output | RETRIEVING DIAGNOSTIC TROUBLE CODES | ||
| *** | 2. Speed Sensor Circuit | DTC 31, 32, 33 & 34 | ||
| *** | 3. Stoplight Switch Circuit | DTC 49 | ||
| *** | 4. Check ABS Actuator | HYDRAULIC BRAKE BOOSTER | ||
| *** | 5. Check For Hydraulic Leakage | Visual Inspection | ||
| DTC Check Cannot Be Performed | 1. ABS Warning Light Circuit | ABS WARNING LIGHT | ||
| *** | 2. Tc Terminal Circuit | Tc TERMINAL CIRCUIT | ||
| Sensor Diagnostics Cannot Be Performed | 1. Ts Terminal Circuit | Ts TERMINAL CIRCUIT | ||
| *** | 2. ABS ECU | ABS WARNING LIGHT ALWAYS ON (ECU MALFUNCTION) | ||
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