Toyota RAV4 Quiz
Supplemental restraint system

Open in occupant classification ecu battery positive line

In this manual: Supplemental restraint system
Introduction — 37Interior — 12Exterior — 432Az-fe engine mechanical — 1552Az-fe ignition — 182Az-fe charging — 232Az-fe emission control — 82az-fe exhaust — 32Az-fe fuel — 72Az-fe lubrication — 4Brake — 17Brake control — 63U140f automatic transaxle — 59Instrument panel — 8Suspension — 18Drive shaft — 23Axle — 6Tire and wheel — 30Air conditioning — 93Lighting — 45Cruise control — 21Differential — 12Door lock — 31Engine immobiliser — 21Horn — 5Can communication — 27Mirror — 5Parking brake — 5Power steering — 27Propeller shaft — 3Seat — 29Seat belt — 27Sliding roof — 25Steering column — 6Wiper and washer — 11Supplemental restraint system — 95Other system — 5Maintenance — 14
36steps
~216min
4/5difficulty
Done 0 of 36
Toyota RAV4. Open in occupant classification ecu battery positive line

Description

Dtc b1794 is set when a malfunction is detected in the occupant classification ecu battery positive line.

Toyota RAV4. Open in occupant classification ecu battery positive line

Wiring diagram
Toyota RAV4. Open in occupant classification ecu battery positive line

Inspection procedure
  1. Check for dtc
  2. Turn the ignition switch on.
  3. Clear the dtcs (see page rs-249).
Hint:

First clear dtcs stored in the occupant classification ecu and then in the center airbag sensor.

  1. Turn the ignition switch off, and wait for at least 10 seconds.
  2. Turn the ignition switch on.
  3. Check the dtcs (see page rs-249).
Ok: dtc b1794 is not output. Hint:

Dtcs other than b1794 may be output at this time, but they are not related to this check.



  1. Check connection of connector
  2. Turn the ignition switch off.
  3. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
  4. Check that the connectors are properly connected to the occupant classification ecu.
Ok: the connectors are properly connected.


  1. Check wire harness (source voltage)
Toyota RAV4. Check wire harness (source voltage)

  1. Turn the ignition switch off.
  2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
  3. Disconnect the l1 connector from the occupant classification ecu.
  4. Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
  5. Measure the voltage of the wire harness side connector.
Standard voltage
  1. Measure the resistance of the wire harness side connector.
Standard resistance


  1. Check for dtc
  2. Turn the ignition switch off.
  3. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
  4. Connect the connectors to the occupant classification ecu.
  5. Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
  6. Turn the ignition switch on.
  7. Clear the dtcs (see page rs-249).
Hint:

First clear dtcs stored in the occupant classification ecu and then in the center airbag sensor.

  1. Turn the ignition switch off, and wait for at least 10 seconds.
  2. Turn the ignition switch on.
  3. Using the intelligent tester, check for dtcs of the occupant classification ecu (see page rs-249).
Ok: dtc b1794 is not output. Hint:

Dtcs other than b1794 may be output at this time, but they are not related to this check.



  1. Replace occupant classification ecu
  2. Turn the ignition switch off.
  3. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
  4. Replace the occupant classification ecu (see page rs- 392).
Hint:

Perform the inspection using parts from a normal vehicle when possible.


  1. Perform zero point calibration
  2. Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
  3. Connect the intelligent tester (with can vim) to the dlc3.
  4. Turn the ignition switch on.
  5. Using the intelligent tester, perform the zero point calibration (see page rs-241).
Ok: completed is displayed.

  1. Perform sensitivity check
  2. Using the intelligent tester, perform the sensitivity check (see page rs-241).
Standard value: 27 to 33 kg (59.52 To 72.75 Lb)

End

Test yourself

A quick Toyota RAV4 quiz: every answer comes with an explanation and a link to the manual page.