Toyota Sienna Service Manual: How to proceed with troubleshooting
HINT:
- Use the following procedures to troubleshoot the cruise control system.
- *: Use the intelligent tester.
1 VEHICLE BROUGHT TO WORKSHOP
2 PROBLEM SYMPTOM CONFIRMATION
3 CHECK MULTIPLEX COMMUNICATION SYSTEM*
Refer to HOW TO PROCEED WITH TROUBLESHOOTING.
- Check for output DTCs.
Result
HINT: The ECM of this system is connected to the multiplex communication system. Therefore, before starting troubleshooting, make sure to check that there is no trouble in the multiplex communication system.
4 CHECK CAN COMMUNICATION SYSTEM*
Refer to PRECAUTION.
- Check for output DTCs.
Result
HINT: The ECM of this system is connected to the CAN communication system. Therefore, before starting troubleshooting, make sure to check that there is no trouble in the CAN communication system.
5 DTC CHECK AND CLEAR*
Refer to DTC CHECK / CLEAR
6 DTC CHECK (OTHER THAN MPX AND CAN SYSTEM DTC)*
Result
7 DTC CHART
Refer to DIAGNOSTIC TROUBLE CODE CHART
8 PROBLEM SYMPTOM CONFIRMATION
Result
9 SYMPTOM SIMULATION
Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE
10 PROBLEM SYMPTOMS TABLE
Refer to PROBLEM SYMPTOMS TABLE
11 CIRCUIT INSPECTION
12 TERMINALS OF ECM
Refer to TERMINALS OF ECM
13 IDENTIFICATION OF PROBLEM
14 REPAIR OR REPLACE
15 CONFIRMATION TEST
END
System description
1. CRUISE CONTROL SYSTEM
This system is controlled by the ECM, and is activated by
the throttle position sensor and motor. The ECM controls
the following functions: ON-OFF, - (COAST)/SET, +
(ACCEL ...
Road test
1. PROBLEM SYMPTOM CONFIRMATION
Inspect the SET function.
Turn the cruise control main switch on.
Drive at the required speed between 40 km/h
(25 mph) and 200 km/h ...
Other materials:
Identification of noise source
1. Radio Description
Radio frequency band
Radio broadcasts use the radio frequency bands
shown in the table below.
Service area
The service areas of AM and FM broadcasts are
vastly different. Sometimes an AM broadcast
can be received very clearly ...
DTC check / clear
1. CHECK DTC (USING INTELLIGENT TESTER)
Checking DTCs.
Connect the intelligent tester to the DLC3.
Turn the ignition switch ON.
Read DTCs by following the prompts on the
tester screen.
HINT:
Refer to the intelligent tester operator's manual
for further details.
2. CLEAR DTC ...
Front wheel alignment
Adjustment
NOTICE:
For vehicles equipped with VSC, if wheel alignment has
been adjusted, and if suspension or underbody
components have been removed/installed or replaced, be
sure to perform the following initialization procedure in
order for the system to function normally:
1. Disconnect the ...
