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Toyota Sienna Service Manual: How to proceed with troubleshooting

HINT: Troubleshoot in accordance with the procedures on the following pages

1 VEHICLE BROUGHT TO WORKSHOP

2 CUSTOMER PROBLEM ANALYSIS CHECK AND SYMPTOM CHECK

3 INSPECT COMMUNICATION FUNCTION OF LARGE-SCALE MULTIPLEX COMMUNICATION SYSTEM (BEAN)

  1. Use the intelligent tester to check for normal function of the multiplex communication system.
  1. (ECU unconnected, communication line malfunctioning) Without code outputs, proceed to A.
  2.  (ECU unconnected, communication line malfunctioning) With code outputs, proceed to B.

4 DTC CHECK

  1. Check for a DTCs.
  1.  Without code outputs, proceed to A.
  2.  With code outputs, proceed to B.

5 PROBLEM SYMPTOMS TABLE

  1. When problem is not listed on problem symptoms table, proceed to A.
  2.  When problem is listed on problem symptoms table, proceed to B.

6 PERFORM TROUBLESHOOTING ACCORDING TO MALFUNCTION SYMPTOM

  1. Data List / Active Test.
  2. Inspection.
  3. Terminals of ECU

7 ADJUST, REPAIR OR REPLACE

8 RESET BACK DOOR SYSTEM

9 CONFIRMATION TEST

END

Back door closer system
PARTS LOCATION ...

Initialization
1. RESET  When the battery is reconnected: The back door is locked and therefore cannot be opened. Therefore, it is necessary to unlock the back door using the door control switch or ...

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 ...

USE SIMULATION METHOD TO CHECK
DTC B0113/42 Short to B+ in Side Squib RH Circuit DESCRIPTION The side squib RH circuit consists of the center airbag sensor assembly and the front seat side airbag assembly RH. This circuit instructs the SRS to deploy when deployment conditions are met. DTC B0113/42 is recorded when a sh ...

Open in Stop Light Switch Circuit
DTC C1249/49 Open in Stop Light Switch Circuit DESCRIPTION WIRING DIAGRAM INSPECTION PROCEDURE 1 CHECK STOP LIGHT SWITCH OPERATION (a) Check that the stop light comes on when the brake pedal is depressed and goes off when the brake pedal is released. OK HINT: Check the stop li ...

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