Toyota Sienna Service Manual: Problem symptoms table
When a "Normal" code is output during a DTC check but the problem still occurs, use the Problem Symptoms Table. The suspected areas (circuits or parts) for each problem symptoms are in the table. The suspected areas are listed in order of probability. A description of each of the chart's columns is shown in the table below.
HINT:
In some cases, the problem is not detected by the diagnostic system even though a problem symptom occurs. It is possible that the problem is occurring outside the detection range of the diagnostic system, or that the problem occurs in a completely different system.
| Item | Description |
| Problem Symptom | - |
| Circuit Inspection, Inspection Order | Indicates the order in which the circuits need to be checked |
| Circuit or Part Name | Indicates the circuit or part which needs to be checked |
| See Page | Indicates the page where the flowchart for each circuit is located |
Diagnostic trouble code chart
Look for output Diagnostic Trouble Codes (DTCs) (from the
DTC checks) in the appropriate section's Diagnostic Trouble
Code Chart. Use the chart to determine the trouble area and
the proper inspecti ...
Circuit inspection
A description of the main areas of each circuit inspection
is shown in the table below.
Item
Description
Circuit Description
The major role, operation of the circuit and its co ...
Other materials:
Reassembly
1. INSTALL FUEL PRESSURE REGULATOR ASSEMBLY
(a) Apply a light coat of gasoline or spindle oil to the 2
new O-rings, and install it to the fuel pressure
regulator.
(b) Apply a light coat of gasoline or spindle oil to the 2
O-rings again, and install the fuel pressure regulator
to the No. ...
Inspection
1. INSPECT LOCK PLATE FOR DAMAGE
(a) Inspect the lock plate for damage.
HINT:
Reassembly of a deformed tank will be
impossible. Therefore, first correct the shape of
the lock plate groove with pliers or a similar tool,
if necessary.
Water leakage will result if the bottom of the lo ...
Check component status
(a) Compare the test value with the minimum test limit
(MIN LIMIT) and maximum test limit (MAX LIMIT).
(b) If the test value is between the minimum test limit
and maximum test limit, the component is
functioning normally. If not, the component is
malfunctioning. The test value is usually sign ...
