Toyota Sienna Service Manual: 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 inspection procedure. A description of each of the chart's columns is shown in the table below.
| Item | Description |
| DTC No. | Indicates the diagnostic trouble code |
| Detection Item | Indicates the system or details of the problem |
| Trouble Area | Indicates the suspect areas of the problem |
| See Page | Indicates the page where the inspection procedures for each circuit is to be found, or gives instruction for checking and repairs. |
Symptom simulation
HINT:
The most difficult case in troubleshooting is when no
problem symptoms occur. In such a case, a thorough
problem analysis must be carried out. A simulation of the
same or similar conditions ...
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 th ...
Other materials:
Disassembly
1. FIX FRONT SHOCK ABSORBER WITH COIL SPRING
(a) Install 2 nuts and a bolt to the bracket at the lower
side of the front shock absorber with coil spring and
secure it in a vise.
2. REMOVE FRONT SUSPENSION SUPPORT SUBASSEMBLY LH
(a) Using SST, compress the front coil spring LH
SST 09727-300 ...
Changing the vehicle-to-vehicle distance
Pressing the button changes the
vehicle-to-vehicle distance as follows:
Long
Medium
Short
The vehicle-to-vehicle distance is
set automatically to long mode
when the engine switch is turned to
IGNITION ON mode.
If a vehicle is running ahead of
you, the preceding vehicle mark
w ...
Center Airbag Sensor Assembly Communication
Circuit Malfunction
DTC B1790 Center Airbag Sensor Assembly Communication
Circuit Malfunction
DESCRIPTION
The center airbag sensor assembly communication circuit consists of the
occupant classification ECU and
the center airbag sensor assembly.
DTC B1790 is recorded when a malfunction is detected in the center ...
