Toyota Sienna Service Manual: 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

1. Check for DTC(s) and freeze frame data.

HINT: Record or print the DTCs and freeze frame data, if necessary.

4 CLEAR DTC AND FREEZE FRAME DATA

1. Clear the DTC(s) and freeze frame data

5 CONDUCT VISUAL INSPECTION

6 SET CHECK MODE DIAGNOSIS

1. Set the check mode

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

1. Check for DTCs.

Result

10 REFER TO DTC CHART

HINT: Refer to the DTC chart

GO TO STEP 13

11 CONDUCT BASIC INSPECTION

HINT: Refer to "BASIC INSPECTION".

Result

12 REFER TO PROBLEM SYMPTOMS TABLE

HINT: Refer to "PROBLEM SYMPTOMS TABLE".

Result

13 CHECK ECM POWER SOURCE CIRCUIT

HINT: Refer to "ECM POWER SOURCE CIRCUIT"

14 CONDUCT CIRCUIT INSPECTION

Result

15 CHECK FOR INTERMITTENT PROBLEMS

HINT: Refer to "CHECK FOR INTERMITTENT PROBLEMS"

GO TO STEP 17

16 CONDUCT PARTS INSPECTION

17 IDENTIFY PROBLEM

18 ADJUST AND/OR REPAIR

19 CONDUCT CONFIRMATION TEST

END