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.

1.  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.

1.  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