ABS w/ Traction Control

Perform troubleshooting in accordance with the procedure.
1. CUSTOMER PROBLEM ANALYSIS
- Using the customer problem analysis check sheet for reference, ask the customer in as much detail as possible about the problem.
2. CHECK AND CLEAR THE DIAGNOSTIC TROUBLE CODES (PRECHECK)
- If the ABS warning light lights up, and the ABS does not operate, the ECU stores diagnostic trouble codes corresponding to the problem in memory.
- Before confirming the trouble, first check the diagnostic trouble codes for any malfunction codes stored in memory. When there are malfunction codes, make a note of them, then clear them and proceed to Problem Symptom Confirmation.
3. PROBLEM SYMPTOM CONFIRMATION
4. SYMPTOM SIMULATION
- Confirm the problem symptoms. If the problem does not recur, simulate the problem by initially checking the circuits indicated by the diagnostic trouble code in step [2] , using "Problem simulation method".
5. DIAGNOSTIC TROUBLE CODE CHECK
- Check the diagnostic trouble codes. If a malfunction code is output, proceed to [6] Diagnostic Trouble Code Chart". If the normal code is output, proceed to [7] Problem Symptoms Chart". Be sure to proceed to [6] Diagnostic Trouble Code Chart" after steps [2] and [3] are completed. If troubleshooting is attempted only by following the malfunction code stored in the memory, errors could be made in the diagnosis.
6. DIAGNOSTIC TROUBLE CODE CHART
- If a malfunction code is confirmed in the diagnostic trouble code check, proceed to the inspection procedure indicated by the matrix chart for each diagnostic trouble code.
7. PROBLEM SYMPTOMS CHART
- If the normal code is confirmed in the diagnostic trouble code check, perform inspection in accordance with the inspection order in the problem symptoms chart.
8. CIRCUIT INSPECTION
- Proceed with diagnosis of each circuit in accordance with the inspection order confirmed in [6] and [7]. Determine whether the cause of the problem is in the sensor, actuators, wire harness and connectors or the ECU.
9. SENSOR CHECK
- Use the ABS warning light to check if each of the signals from speed sensors are being input correctly to the ECU. Instructions for this check are given in the circuit inspection.
10. REPAIRS
- After the cause of the problem is located, perform repairs by following the inspection and replacement procedures in this manual.
11. CONFIRMATION TEST
- After completing repairs, confirm not only that the malfunction is eliminated, but also conduct a test drive to make sure the entire ABS system is operating correctly. (In vehicles with the TRAC system, also check the TRAC system.)