How to proceed with troubleshooting
HINT:
The intelligent tester can be used in steps 2, 3, 4, 6 and 9.
1 VEHICLE BROUGHT TO WORKSHOP

2 CONNECT INTELLIGENT TESTER TO DLC3
HINT:
If the display indicates a communication fault in the tester, inspect the DLC3.

3 CHECK DTC AND FREEZE FRAME DATA
(a) Check for DTC(s) and freeze frame data (See page ES- 40).
HINT:
Record or print the DTCs and freeze frame data, if necessary.

4 CLEAR DTC AND FREEZE FRAME DATA
(a) Clear the DTC(s) and freeze frame data (See page ES- 40).

5 CONDUCT VISUAL INSPECTION

6 SET CHECK MODE DIAGNOSIS
(a) Set the check mode (See page ES-43).

7 CONFIRM PROBLEM SYMPTOMS
HINT:
If the engine does not start, perform steps 9 and 11 first.
Result 


8 SIMULATE SYMPTOMS

9 CHECK FOR DTCS
(a) Check for DTCs (See page ES-39).
Result 

10 REFER TO DTC CHART
HINT:
Refer to the DTC chart (See page ES-56).

GO TO STEP 13
11 CONDUCT BASIC INSPECTION
HINT:
Refer to "BASIC INSPECTION" (See page ES-13).
Result 

12 REFER TO PROBLEM SYMPTOMS TABLE
HINT:
Refer to "PROBLEM SYMPTOMS TABLE" (See page ES- 27).
Result 


13 CHECK ECM POWER SOURCE CIRCUIT
HINT:
Refer to "ECM POWER SOURCE CIRCUIT" (See page ES- 437).

14 CONDUCT CIRCUIT INSPECTION
Result 


15 CHECK FOR INTERMITTENT PROBLEMS
HINT:
Refer to "CHECK FOR INTERMITTENT PROBLEMS" (See page ES-13).

GO TO STEP 17
16 CONDUCT PARTS INSPECTION

17 IDENTIFY PROBLEM

18 ADJUST AND/OR REPAIR

19 CONDUCT CONFIRMATION TEST

END
Test yourself
A quick Toyota Sienna quiz: every answer comes with an explanation and a link to the manual page.