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Home >> Toyota >> 2005 >> Avalon XLS >> Repair and Diagnosis >> Brakes >> Traction Control >> Brakes - Abs With EBD & BA & TRAC & VSC (Diagnostics) >> Problem Symptoms Table

Problem Symptoms Table

If there are no DTCs output but the problem still occurs, check the circuits for each problem symptom in the order given in the table below.

PROBLEM SYMPTOMS TABLE - ABS, VSC AND BRAKE ASSIST SYSTEMS

Symptoms Suspected Areas
ABS does not operate BA does not operate EBD does not operate
  1. Check the DTC again and make sure that the normal system code is output (if a trouble code is output, see page 05-578)
  2. IG power source circuit
  3. Speed sensor circuit
  4. Check the ABS & TRACTION actuator assy with the hand-held tester (Check ABS & TRACTION actuator assy operation using the active test function) If abnormal, check the hydraulic circuit for leakage
  5. If the symptoms still occur even after the above circuits in suspected areas are inspected and proved to be normal, replace the ABS & TRACTION actuator assy (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 system code is output (if a trouble code is output, see page 05-578)
  2. Speed sensor circuit
  3. Stop light switch circuit
  4. Check the ABS & TRACTION actuator assy with the hand-held tester (Check ABS & TRACTION actuator assy operation using the active test function) If abnormal, check the hydraulic circuit for leakage
  5. If the symptoms still occur even after the above circuits In suspected areas are inspected and proved to be normal, replace the ABS & TRACTION actuator assy (skid control ECU)
VSC and/or TRACTION does not operate
  1. Check the DTC again and make sure that the normal system code is output (If a trouble code is output, see page 05-578)
  2. IG power source circuit and ground circuit.
  3. Check the hydraulic circuit for leakage
  4. Speed sensor circuit
  5. Yaw rate/Deceleration sensor circuit
  6. Steering sensor circuit
  7. If the symptoms still occur even after the above circuits in suspected areas are inspected and proved to be normal, replace the ABS & TRACTION actuator assy (skid control ECU)
ABS sensor DTC check cannot be done
  1. Check the DTC again and make sure that the normal system code is output (If a trouble code is output, see page 05-578)
  2. TC and CG terminal circuit
  3. If the symptoms still occur even after the above circuits in suspected areas are inspected and proved to be normal, replace the ABS & TRACTION actuator assy (skid control ECU)
VSC sensor DTC check cannot be done
  1. Check the DTC again and make sure that the normal system code is output (If a trouble code is output, see page 05-578)
  2. TC and CG terminal circuit
  3. If the symptoms still occur even after the above circuits in suspected areas are inspected and proved to be normal, replace the ABS & TRACTION actuator assy (skid control ECU)
Sensor signal check cannot be done
  1. TS and CG terminal circuit
  2. ABS & TRACTION actuator assy (skid control ECU)
ABS warning light abnormal (Remains on)
  1. ABS warning light circuit
  2. ABS & TRACTION actuator assy (skid control ECU)
ABS warning light abnormal (Does not come on)
  1. ABS warning light circuit
  2. ABS & TRACTION actuator assy (skid control ECU)
VSC warning light abnormal (Remains on)
  1. VSC warning circuit
  2. ABS & TRACTION actuator assy {skid control ECU)
VSC warning light abnormal (Does not come on)
  1. VSC warning light circuit
  2. ABS & TRACTION actuator assy (skid control ECU)
BRAKE warning light abnormal (Remains on)
  1. BRAKE warning light circuit
  2. ABS & TRACTION actuator assy (skid control ECU)
BRAKE Warning light abnormal (Does not come on)
  1. BRAKE warning light circuit
  2. ABS & TRACTION actuator assy (skid control ECU)
SLIP indicator light abnormal (Remains on)
  1. SLIP indicator light circuit
  2. ABS & TRACTION actuator assy (skid control ECU)
SLIP indicator light abnormal (Does not come on)
  1. SLIP indicator light circuit
  2. ABS & TRACTION actuator assy (skid control ECU)
Skid control buzzer abnormal
  1. Skid control buzzer circuit
  2. ABS & TRACTION actuator assy (skid control ECU)
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