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Problem Symptoms Table

If a normal code is displayed during the DTC check but the problem still occurs, check the circuits for each problem symptom in the order given in the table below and proceed to the relevant troubleshooting page.

NOTE: When replacing skid control ECU, sensor or etc., turn the IG switch to OFF.
ANTI-LOCK BRAKE SYSTEM WITH EBD - PROBLEM SYMPTOMS TABLE

Symptoms Inspection Circuit Refer To
ABS does not operate. Only when 1. to 4. are all normal and the problem is still occurring, replace the skid control ECU.
  • 3. Check the DTC reconfirming that the normal code is output.
  • 4. Power source circuit
  • 5. Speed sensor circuit
  • 6. Check the hydraulic circuit for leakage.
 PRE-CHECK 
3. DTC C1241/41: LOW BATTERY POSITIVE VOLTAGE OR ABNORMALLY HIGH BATTERY POSITIVE VOLTAGE 
4. CIRCUIT TESTS 
5. SPEED SENSOR CIRCUITS 
6. ON-VEHICLE INSPECTION
ABS does not operate intermittently Only when 1. to 4. are all normal and the problem is still occurring, replace the skid control ECU.
  1. Check the DTC reconfirming that the normal code is output.
  2. Speed sensor circuit
  3. Stop lamp switch circuit
  4. Check the hydraulic circuit for leakage.
  1. PRE-CHECK 
  2. CIRCUIT TESTS 
  3. SPEED SENSOR CIRCUITS  / DTC C1249/49: OPEN CIRCUIT IN STOP LIGHT SWITCH CIRCUIT 
  4. ON-VEHICLE INSPECTION
ABS warning light abnormal.
  1. ABS warning light circuit
  2. Skid control ECU
  1. DTC ALWAYS ON MALFUNCTION IN ABS ECU  / ABS WARNING LIGHT CIRCUIT (DOES NOT LIGHT UP) 
  2. -
Brake warning light abnormal.
  1. Brake warning light circuit
  2. Skid control ECU
  1. BRAKE WARNING LIGHT CIRCUIT 
  2. -
DTC check cannot be done. Only when 1. and 2. are all normal and the problem is still occurring, replace the skid control ECU.
  1. ABS warning light circuit
  2. Tc terminal circuit
  1. ABS WARNING LIGHT CIRCUIT (DOES NOT LIGHT UP) 
  2. TC TERMINAL CIRCUIT 
Speed sensor signal check cannot be done.
  1. D/G terminal circuit
  2. Skid control ECU
  1. -
  2. -
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