How To Proceed With Troubleshooting

WARNING: This page is about a different car, the 2002 Toyota Highlander. However, it is still accessible from the selected car via links, so may be relevant.

Vehicle Brought to Workshop
Customer Problem Analysis. See CUSTOMER PROBLEM ANALYSIS CHECK .
Check and Clear DTCs and Freeze Frame Data. See PRE-CHECK .
Problem Symptom Confirmation
1. Symptom does not occur. Go to step 5
2. Symptom occurs. Go to step 6 .
Symptom Simulation. See HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS .
DTC Check. See PRE-CHECK .
1. DTC is not output: Go to next step.
2. DTC is output: Go to step 8 .
Problem Symptoms. See PROBLEM SYMPTOMS table.
1. Check for fluid leakage and go to step 10 .
DTC Chart. See DIAGNOSTIC TROUBLE CODE CHART .
Circuit Inspection. See INSPECTION PROCEDURE .
Identification of Problem
Repair
Confirmation Test
End

NOTE:

Step 3, 6, 9, 12:

Diagnostic steps permitting the use of the TOYOTA hand-held tester.

Fail safe function:

When a failure occurs in the ABS system, the ABS warning light is lit and the ABS operation is prohibited. In addition to this, when the failure which disables the EBD operation occurs, the brake warning light is lit as well and the EBD operation is prohibited.