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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 diagnostic trouble code.
  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.  Operation check.
  3.  Inspection.
  4.  Terminals of ECU

7 ADJUST, REPAIR OR REPLACE

8 RESET POWER SLIDE DOOR SYSTEM

9 CONFIRMATION TEST

END

Power slide door system
PARTS LOCATION ...

Operation check
NOTICE: Inspection should be started after conforming that the items listed in the "CUSTOMIZE PARAMETER" for the power slide door system have defaulted to the initial settings. 1. CHECK ...

Other materials:

Fuel Pump Control Circuit
DESCRIPTION The FUEL PUMP relay switches the fuel pump speed according to the engine conditions. The fuel pump operates when the ECM receives the starter-operating signal (STA) and crankshaft-rotating signal (NE). The FUEL PUMP relay is turned ON while the engine is idling or operating at l ...

Power Slide Door LH does not Operate When Satellite Switch is Pressed
DESCRIPTION  The power slide door operates only when the power slide door main switch is ON (switch free: orange paint on the top of the switch appears). The power slide door ECU LH controls the power slide door LH, which activates the slide door motor to open / close the slide do ...

Terminals of ECU
1. INSTRUMENT PANEL JUNCTION BLOCK (MULTIPLEX NETWORK BODY ECU)  Disconnect the B6, B7 and B9 ECU connectors. Disconnect the 1A, 1C, 1K, 1L and 1P J/B connectors. Check the voltage or resistance according to the value(s) in the table below (wire harness side connector). ...

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