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Symptom Diagnosis

Perform symptom diagnosis when no DTCs are present, but symptom still occurs. See SYMPTOM DIAGNOSIS  table. Perform appropriate test or procedure as directed.

SYMPTOM DIAGNOSIS

Symptom Suspect Area Go To/Action
ABS Inoperative (1) 1. Confirm No DTCs Are Set DIAGNOSTIC SYSTEM CHECK 
2. Check Power Source Circuit DTC 41 
3. Check Speed Sensor Circuit DTCs 31, 32, 33 & 34 
4. Check Hydraulic Circuit For Leaks Repair As Necessary
ABS Does Not Operate Efficiently (1) 1. Confirm No DTCs Are Set DIAGNOSTIC SYSTEM CHECK 
2. Check Speed Sensor Circuit DTCs 31, 32, 33 & 34 
3. Check Stoplight Switch Circuit DTC 49 
4. Check Power Source Circuit DTC 41 
5. Check Hydraulic Circuit For Leaks Repair As Necessary
ABS Warning Light Abnormal 1. Check ABS Warning Light Circuit ABS WARNING LIGHT CIRCUIT 
2. ABS Actuator/ECU Replace ABS Actuator/ECU Assembly
DTCs Cannot Be Retrieved (2) 1. Check ABS Warning Light Circuit ABS WARNING LIGHT CIRCUIT 
2. Check Tc Terminal Circuit Tc TERMINAL CIRCUIT 
Speed Sensor Signal
Check Cannot Be Performed 1. Check Ts Terminal Circuit Ts TERMINAL CIRCUIT 
2. ABS Actuator/ECU Replace ABS Actuator/ECU Assembly
(1) If no DTCs are set, no hydraulic leaks are present and problem still occurs, replace ABS actuator/control unit assembly.
(2) If listed circuits check okay, replace ABS actuator/control unit assembly.
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