When a "normal" code is output during a dtc check but the problem is still occurring, use the problem symptoms table. The suspected areas (circuits or parts) for each problem symptom are in the table. The suspected areas are listed in order of probability. A description of each of the chart's columns is below.
Hint: in some cases, the problem is not detected by the diagnostic system even though a problem symptom is present. It is possible that the problem is occurring outside the detection range of the diagnostic system, or that the problem is occurring in a completely different system.

Diagnostic trouble code chart
Circuit inspectionClosing the fuel tank cap
After refueling, turn the fuel tank
cap until you hear a click. Once
the cap is released, it will turn
slightly in the opposite direction.
Caution
When replacing the fuel tank cap
Do not use anything but a genuine toyota fuel tank cap designed for
your
vehicle. Doing so may cause a fire ...
Installation
Hint:
Use the same procedures for the lh side and rh side.
The procedures listed below are for the lh side.
A bolt without a torque specification is shown in the
standard bolt chart (see page ss-2).
Install rear no. 1 Seat outer belt assembly lh
Align the claws with the sea ...
Blower motor circuit
Description
The blower motor is operated by signals from the air conditioning amplifier.
Blower motor speed signals
are transmitted in accordance with changes in the duty ratio.
Wiring diagram
Inspection procedure
Perform active test by intelligent tester (blower motor)
Conne ...