Toyota RAV4 manuals

Toyota Sienna Service Manual: Problem symptoms table

HINT:

If the malfunction still exists after checking and confirming that all circuits and components are normal, replace the ECU.

FRONT POWER SEAT CONTROL SYSTEM ( w/o MEMORY)

Symptom

Suspected area

Power seat does not operate (slide, front vertical, lifter, reclining).
  1. P/SEAT fuse
  2. Power seat switch
  3. Wire harness or connector
Slide operation function only does not operate.
  1. Power seat switch
  2. Front seat frame with adjuster (LH side slide motor)
  3. Front seat frame with adjuster (RH side slide motor)
  4. Wire harness or connector
Front vertical operation function only does not operate.
  1. Power seat switch
  2. Front seat frame with adjuster (LH side front vertical motor)
  3. Wire harness or connector
Lifter operation function only does not operate.
  1. Power seat switch
  2. Front seat frame with adjuster (LH side lifter motor)
  3. Wire harness or connector
Reclining operation function only does not operate.
  1. Power seat switch
  2. Front seat frame with adjuster (LH side reclining motor)
  3.  Front seat frame with adjuster (RH side reclining motor)
  4. Wire harness or connector
Lumbar support operation function only does not operate (Driver side only).
  1. Front power seat lumbar switch
  2. Lumbar support adjuster assembly
  3. Wire harness or connector

FRONT POWER SEAT CONTROL SYSTEM ( w/ MEMORY)

Symptom

Suspected area

Power seat does not operate (manual or memorized position).
  1. ECU power source circuit
  2. Position control ECU and switch assembly (power seat control switch and ECU)
One of the power seat functions does not operate (manual or memorized position).
  1. Power seat motor circuit
  2. Position control ECU and switch assembly (power seat control switch and ECU)
One or all manual seat functions do not operate (memorized positions OK).
  1. Position control ECU and switch assembly (power seat control switch
Memory function does not operate.
  1. Memory switch circuit
  2. Multiplex communication system
  3. Position control ECU and switch assembly (power seat control switch
No memory functions operate or all memory functions operate briefly
  1. ECU power source circuit
  2. Position control ECU and switch assembly (power seat control switch
One memory function does not operate or operates briefly and then stops
  1. Front seat frame with adjuster (power seat motor)
  2. Position control ECU and switch assembly (power seat control switch
How to proceed with troubleshooting
HINT:  Use this procedure to troubleshoot the front power seat control system.  The intelligent tester should be used in steps 3 and 5. 1 VEHICLE BROUGHT TO WORKSHOP 2 CUSTOMER P ...

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 sid ...

Other materials:

Touch screen gestures
Operations are performed by touching the screen directly with your finger. Operation method Outline Main use Touch Quickly touch and release once. Changing and selecting various settings. Drag* Touch the screen with your ...

Installation
1. REMOVE FRONT SEAT INNER BELT ASSEMBLY HINT:  Refer to the instructions for reassembly of the front seat assembly (for flat type).  Refer to the instructions for reassembly of the front seat assembly (for manual seat).  Refer to the instructions for reassembly of the fr ...

Evaporator temperature sensor
ON-VEHICLE INSPECTION 1. INSPECT A/C EVAPORATOR TEMPERATURE SENSOR (a) Remove the A/C evaporator temperature sensor (A/ C thermistor). (b) Disconnect the connector from the A/C evaporator temperature sensor (A/C thermistor). (c) Measure the resistance according to the value(s) in the ...

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