How To Proceed With Troubleshooting

WARNING: This page is about a different car, the 2005 Toyota Sienna. However, it is still accessible from the selected car via links, so may be relevant.

Vehicle Brought to Workshop
CUSTOMER PROBLEM ANALYSIS CHECK
Check and Clear DTCs (See PRE-CHECK )
Problem Symptom Confirmation
1. Symptom does not occur: Go to step 5
2. Symptom occur: Go to step 6
Symptom Simulation (See HOW TO PROCEED WITH TROUBLESHOOTING )
DTC Check (See PRE-CHECK )
1. There is no output: Go to step 7
2. There is output: Go to step 8
(See PROBLEM SYMPTOMS TABLE )
1. Check for fluid leakage and Go to step 10
(See DIAGNOSTIC TROUBLE CODE TABLE )
(See CIRCUIT DESCRIPTION - RIGHT/LEFT FRONT SPEED SENSOR CIRCUIT - CIRCUIT DESCRIPTION - TS TERMINAL CIRCUIT )
Identification of Problem
Repair
Confirmation Test
1. End
HINT:

Step 3, 6, 9, 12:

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

Fail safe function:

When a failure occurs in the ABS & BA & TRAC & VSC systems, the ABS and VSC warning lights and the TRAC OFF indicator light comes on and the ABS & BA & TRAC & VSC operations are prohibited. In addition to this, when there is a failure that disables the EBD operation, the brake warning light also comes on and the EBD operation is prohibited.