How To Proceed With Troubleshooting

WARNING: This page is about a different car, the 2005 Lexus RX 330. However, it is still accessible from the selected car via links, so may be relevant.

VEHICLE BROUGHT TO WORK SHOP
1. Go to next step.
CUSTOMER PROBLEM ANALYSIS (See CUSTOMER PROBLEM ANALYSIS CHECK )
1. Go to next step.
CHECK BODY MULTIPLEX COMMUNICATION SYSTEM (See HOW TO PROCEED WITH TROUBLESHOOTING )
1. Check that the DTC is output.
1. DTC IS OUTPUT (PROCEED TO " MULTIPLEX COMMUNICATION SYSTEM - DIAGNOSTICS ")
2. DTC IS NOT OUTPUT (GO TO STEP 4)
PROBLEM SYMPTOM CONFIRMATION
1. SYMPTOM DOES NOT OCCUR (GO TO STEP 5)
2. SYMPTOM OCCURS (GO TO STEP 6 )
SYMPTOM SIMULATION (See HOW TO PROCEED WITH TROUBLESHOOTING )
1. Go to next step.
BASIC INSPECTION
1. Check the battery voltage.
1. Standard: 11 to 14 V
DTC CHECK (See PRE-CHECK )
1. Check that the cruise control system DTC is out put.
1. MALFUNCTION CODE (GO TO STEP 8)
2. NORMAL CODE (GO TO STEP 9 )
DTC CHART (See DIAGNOSTIC TROUBLE CODE CHART )
1. GO TO STEP 9
PROBLEM SYMPTOMS TABLE
1. Go to next step.
CIRCUIT INSPECTION (See DTC P0500/21 VEHICLE SPEED SENSOR "A", DTC P0503/23 VEHICLE SPEED SENSOR "A" INTERMITTENT/ERRATIC/HIGH - See DIAGNOSIS CIRCUIT )
1. Go to next step.
TERMINALS OF ECM
1. Go to next step.
INDEMNIFICATION OF PROBLEM
1. Go to next step.
REPAIR OR REPLACE
1. Go to next step.
CONFIRMATION TEST
1. END
HINT:

Step 3, 7, 10, 14:

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