Toyota RAV4 manuals

Toyota Sienna Service Manual: Driving Position Memory Switch Circuit (w/ Memory)

Toyota Sienna Service Manual / Seat / Front power seat control system / On-vehicle inspection / Driving Position Memory Switch Circuit (w/ Memory)

DESCRIPTION

The seat memory switch sends signals to the outer mirror control ECU LH via the multiplex communication system to memorize a given seat position. This memory system does not use a position sensor. The seat position is detected by counting pulses that are output when the motor turns. If there is no pulse output from the motor, the motor will stop operating. The seat memory switch is later used to send signals to the front power seat switch to return the seat to one of the memorized positions.

The power seat memory operation can be performed only when the ignition switch is on and the shift lever is in the P position.

WIRING DIAGRAM

WIRING DIAGRAM

INSPECTION PROCEDURE

1 READ VALUE OF INTELLIGENT TESTER

  1. Connect the intelligent tester (with CAN VIM) to the DLC3.
  2. Turn the ignition switch on.
  3.  Read the DATA LIST.

D_SEAT (Position control ECU and switch assembly)

Position control ECU and switch assembly

OK: Condition status can be displayed.

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

2 INSPECT SEAT MEMORY SWITCH (DRIVING POSITION MEMORY SWITCH)

INSPECT SEAT MEMORY SWITCH

  1. Remove the seat memory switch.
  2.  Measure the resistance according to the value(s) in the table below.

Standard resistance

Standard resistance

3 CHECK HARNESS AND CONNECTOR (SEAT MEMORY SWITCH CIRCUIT)

CHECK HARNESS AND CONNECTOR (SEAT MEMORY SWITCH CIRCUIT)

  1. Measure the voltage according to the value(s) in the table below.

Standard voltage

Standard voltage

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

4 CHECK HARNESS AND CONNECTOR (OUTER MIRROR CONTROL ECU LH - SEAT MEMORY SWITCH)

CHECK HARNESS AND CONNECTOR

  1. Disconnect outer mirror control ECU LH connector.
  2.  Measure the resistance according to the value(s) in the table below.

Standard resistance

Standard resistance

REPLACE OUTER MIRROR CONTROL ECU LH

Power Seat Motor Circuit
DESCRIPTION When the power seat control switch is operated, a command signal is sent to the position control ECU and switch assembly (power seat control switch and ECU). The front power seat swi ...

ECU Power Source Circuit
DESCRIPTION The position control ECU and switch assembly (power seat control switch and ECU) is contained in the switch assembly. During manual operation, only one switch signal is accepted. If ...

Other materials:

Check mode procedure
1. CHECK MODE (SIGNAL CHECK): DTC CHECK  Connect the intelligent tester to the DLC3.  Turn the ignition switch to the ON position. Select the "SIGNAL CHECK", and proceed checking using the intelligent tester. NOTICE: Select the "SIGNAL CHECK" from the ...

Sleep Operation Failure of Occupant Classification ECU
DTC B1796 Sleep Operation Failure of Occupant Classification ECU DESCRIPTION During sleep mode, the occupant classification ECU reads the condition of each sensor while the ignition switch is off. In this mode, if the occupant classification ECU detects an internal malfunction, DTC B1796 ...

Open in Stop Light Switch Circuit
DTC C1249/49 Open in Stop Light Switch Circuit DESCRIPTION This skid control ECU inputs the stop light switch signal and detects the status of brake operation. The skid control ECU has an open detection circuit. If an open in the stop light switch input line or GND side stop light circuit ...

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