Toyota RAV4 manuals

Toyota Sienna Service Manual: Indicator Circuit

DESCRIPTION

This system has two indicator lights. One of the indicator lights is built into the fold seat switch. This indicator light receives power from the fold seat control ECU. It comes on or blinks when the system detects that an object is caught or when the seat operation conditions are not met.

The other indicator light is on the combination meter. This indicator light comes on when the reclining motor or fold seat control ECU is not initialized, any seat legs are released, or when the seatback is outside the reclining operation range.

WIRING DIAGRAM

WIRING DIAGRAM

INSPECTION PROCEDURE

HINT:

1 INSPECT FOLD SEAT SWITCH

INSPECT FOLD SEAT SWITCH

  1. Remove the fold seat switch.
  2.  Disconnect the connector from the fold seat switch.
  3.  Connect the positive (+) lead from the battery terminal 3 and negative (-) lead to terminal 5, and check that the indicator light comes on.

OK: Indicator light comes on.

2 CHECK HARNESS AND CONNECTOR (FOLD SEAT CONTROL ECU - FOLD SEAT SWITCH)

CHECK HARNESS AND CONNECTOR

  1. Disconnect the connector from the fold seat control ECU.
  2. Measure the resistance according to the value(s) in the table below.

Standard resistance LH side

Standard resistance

RH side

Standard resistance

3 CHECK HARNESS AND CONNECTOR (FOLD SEAT SWITCH - BACK DOOR COURTESY SWITCH)

CHECK HARNESS AND CONNECTOR

  1. Disconnect the connector from the back door courtesy switch.
  2.  Measure the resistance according to the value(s) in the table below.

Standard resistance LH side

Standard resistance

RH side

Standard resistance

4 INSPECT BACK DOOR COURTESY SWITCH

INSPECT BACK DOOR COURTESY SWITCH

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

Standard resistance

Standard resistance

5 CHECK HARNESS AND CONNECTOR (BACK DOOR COURTESY SWITCH - BODY GROUND)

CHECK HARNESS AND CONNECTOR

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

Standard resistance

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

6 CHECK HARNESS AND CONNECTOR (COMBINATION METER - BATTERY)

CHECK HARNESS AND CONNECTOR

  1. Remove the combination meter.
  2.  Disconnect the connector from the combination meter.
  3.  Measure the voltage according to the value(s) in the table below.

Standard voltage

Standard voltage

7 CHECK HARNESS AND CONNECTOR (COMBINATION METER - FOLD SEAT CONTROL ECU)

CHECK HARNESS AND CONNECTOR

  1. Disconnect the connector from the fold seat control ECU.
  2.  Measure the resistance according to the value(s) in the table below.

Standard resistance LH side

Standard resistance

RH side

Standard resistance

8 INSPECT COMBINATION METER (3rd SEAT INDICATOR LIGHT)

INSPECT COMBINATION METER (3rd SEAT INDICATOR LIGHT)

  1. Connect the positive (+) lead from the battery terminal 32 and negative (-) lead to terminal 3, and check that the indicator light comes on.

OK: Indicator light comes on.

7 CHECK HARNESS AND CONNECTOR (COMBINATION METER - FOLD SEAT CONTROL ECU)

CHECK HARNESS AND CONNECTOR

  1. Disconnect the connector from the fold seat control ECU.
  2. Measure the resistance according to the value(s) in the table below.

Standard resistance LH side

Standard resistance

RH side

Standard resistance

8 INSPECT COMBINATION METER (3rd SEAT INDICATOR LIGHT)

INSPECT COMBINATION METER (3rd SEAT INDICATOR LIGHT)

  1. Connect the positive (+) lead from the battery terminal 32 and negative (-) lead to terminal 3, and check that the indicator light comes on.

OK: Indicator light comes on.

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

Back Door Courtesy Switch Circuit
DESCRIPTION The fold seat control ECU receives signals from the back door courtesy switch and detects the state of the back door (open/close). If the ECU does not detect that the back door is open ...

Power Source Circuit
DESCRIPTION Power is supplied to the fold seat control ECU through the L-RR2 SEAT and R-RR2 SEAT fuses. WIRING DIAGRAM INSPECTION PROCEDURE 1 INSPECT FUSE (L-RR2 SEAT, R-RR2 SEAT) Re ...

Other materials:

Disassembly
1. REMOVE RADIATOR WATER INLET (a) Remove the 2 bolts and radiator water inlet. 2. REMOVE DRAIN PLUG (a) Remove the drain plug and air drain plug. (b) Remove the 2 O-rings. 3. REMOVE LOWER RADIATOR TANK (a) Install the claw to the overhaul handle, inserting it in the hole in Part A ...

Disassembly
HINT: When the battery is reconnected, the back door is locked and cannot be opened. Therefore, it is necessary to unlock the back door using the door control switch or transmitter switch. 1. REMOVE BACK DOOR SCUFF PLATE (See page ET- 18) 2. REMOVE QUARTER TRIM PANEL ASSEMBLY FRONT LH 3. REM ...

Data list / active test
1. READ DATA LIST HINT: Using the intelligent tester to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may be disco ...

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