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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:

Problem symptoms table
HINT:  Inspect the fuse and relay before confirming the suspected areas in the table below.  Inspect each suspected area in numerical order for the corresponding symptom. If the malfunction still exists after checking and confirming that all circuits and components are normal ...

Inspection
1. INSPECT TIRES (a) Check the tires for wear and proper inflation pressure. Cold tire inflation pressure (b) Using a dial indicator, check the runout of the tires. Tire runout: 1.4 mm (0.055 in.) or less 2. ROTATE TIRES HINT: Rotate the tires as shown in the illustration. 3. INSP ...

Terminals of ECU
1. POSITION CONTROL ECU AND SWITCH ASSEMBLY (POWER SEAT CONTROL SWITCH AND ECU)  Disconnect the P58 and P59 connectors. Check the voltage of each terminal of the wire harness side connectors. If the result is not as specified, there may be a malfunction in the wire harn ...

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