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 WORKSHOP
1. NEXT: GO TO NEXT STEP.
(see CUSTOMER PROBLEM ANALYSIS CHECK )
1. NEXT: GO TO NEXT STEP.
BASIC INSPECTION
1. Basic inspection.
  1. Check the battery voltage.
    Standard: 11 to 14 V
2. Check the power supply to the radio receiver assy.
  1. Turn the ignition switch to the ACC position.
  2. Check whether or not the display appears on the radio receiver assy.
1. DISPLAY DOES NOT APPEAR (PROCEED TO PROBLEM SYMPTOMS TABLE )
2. DISPLAY APPEARS (GO TO STEP 4)
DTC CHECK (SEE PRE-CHECK )
1. DTC IS OUTPUT (GO TO STEP 7 )
2. DTC IS NOT OUTPUT (GO TO STEP 8 )
(SEE DIAGNOSTIC TROUBLE CODE CHART )
1. GO TO STEP 10
(SEE PROBLEM SYMPTOMS TABLE )
1. NEXT: GO TO NEXT STEP.
CIRCUIT INSPECTION AND PART INSPECTION (See POWER SOURCE CIRCUIT (RADIO RECEIVER ASSY) - TAPE IS TANGLED DUE TO INCORRECT TAPE SPEED OR AUTO-REVERSE MALFUNCTION )
1. NEXT: GO TO NEXT STEP.
IDENTIFICATION OF PROBLEM
1. NEXT: GO TO NEXT STEP.
CONFIRMATION TEST
1. NEXT: END