Toyota Sienna Service Manual: How to proceed with troubleshooting

HINT:

•  Use the following procedures to troubleshoot the dynamic laser cruise control system.
•  *: Use the intelligent tester

1 VEHICLE BROUGHT TO WORKSHOP

2 CUSTOMER PROBLEM ANALYSIS

3 PROBLEM SYMPTOM CONFIRMATION

Result

SYMPTOM SIMULATION

4 INSPECT BATTERY VOLTAGE

Standard voltage: 11 to 14 V

If the voltage is below 11 V, replace or recharge the battery before proceeding.

5 CHECK COMMUNICATION FUNCTION OF MULTIPLEX COMMUNICATION SYSTEM (BEAN)

1. Use the intelligent tester to check if the multiplex communication system (MPX) is functioning normally.

Result

6 CHECK COMMUNICATION FUNCTION OF CONTROLLER AREA NETWORK (CAN)

1. Use the intelligent tester to check for normal function of the CAN communication system.
2. Check for DTCs.

Result

7 DTC CHECK

Result

8 DTC CHART

9 PROBLEM SYMPTOMS TABLE

10 CIRCUIT INSPECTION

11 TERMINALS OF ECM

12 IDENTIFICATION OF PROBLEM

13 REPAIR OR REPLACE

14 CONFIRMATION TEST

END