Toyota Sienna Service Manual: How to proceed with troubleshooting
HINT:
- Use these procedures to troubleshoot the power door lock control system.
- The intelligent tester should be used in steps 4 and 5.
1 VEHICLE BROUGHT TO WORKSHOP
2 CUSTOMER PROBLEM ANALYSIS CHECK
HINT:
- In troubleshooting, confirm that the problem symptoms have been accurately identified. Preconceptions should be discarded in order to make an accurate judgment. To clearly understand what the problem symptoms are, it is extremely important to ask the customer about the problem and the conditions at the time the malfunction occurred.
- Gather as much information as possible for reference.
Past problems that seem unrelated may also help in some cases.
- The following 5 items are important points in the problem analysis:
| What | Vehicle model, system name |
| When | Date, time, occurrence frequency |
| Where | Road conditions |
| Under what conditions? | Running conditions, driving conditions, weather conditions |
| How did it happen? | Problem symptoms |
3 INSPECT BATTERY VOLTAGE
Standard Voltage: 11 to 14 V If the voltage is below 11 V, recharge or replace the battery before proceeding.
4 INSPECT COMMUNICATION FUNCTION OF MULTIPLEX COMMUNICATION SYSTEM (BEAN)
- Use the intelligent tester to check if the Multiplex Communication System (MPX) is functioning normally
Result
5 PROBLEM SYMPTOMS TABLE
Result
6 OVERALL ANALYSIS AND TROUBLESHOOTING
- Terminals of ECU
- DATA LIST/ACTIVE TEST
7 REPAIR OR REPLACE
8 CONFIRMATION TEST
END
System description
1. POWER MIRROR CONTROL SYSTEM DESCRIPTION
This system has these functions: automatic glare-resistant
electrochromic (EC) mirror, electrical remote control type
mirror, memory function, foot light ...
Problem symptoms table
HINT:
Use the table below to help determine the cause of the
problem symptoms. The potential causes of the symptoms
are listed in order of probability in the ''Suspected Area''
column ...
Other materials:
TC and CG Terminal Circuit
DESCRIPTION
DTC output mode is set by connecting terminals 13 (TC) and 4 (CG) of the
DLC3. The DTCs are indicated
by blinks of the tire pressure warning light.
WIRING DIAGRAM
HINT:
When each warning light blinks continuously, a ground short in the wiring of
terminal TC of the DLC3 or an ...
If your vehicle has to
be stopped in an
emergency
Only in an emergency, such as if it becomes impossible to stop
the vehicle in the normal way, stop the vehicle using the following
procedure:
Steadily step on the brake pedal with both feet and firmly depress it.
Do not pump the brake pedal repeatedly as this will increase the effort
requi ...
Inspection
1. INSPECT TIRE PRESSURE WARNING RESET SWITCH
(a) Remove the tire pressure warning reset switch.
(b) Measure the resistance between terminals 1 and 2
of the tire pressure warning reset switch when the
tire pressure warning switch is ON and OFF.
Standard resistance
If the result is not as ...
