Toyota RAV4 manuals

Toyota Sienna Service Manual: 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 is output.

DESCRIPTION

INSPECTION PROCEDURE

1 CHECK DTC

  1. Turn the ignition switch to the ON position.
  2.  Clear the DTCs stored in memory.

    HINT: First clear DTCs stored in the occupant classification ECU and then in the center airbag sensor assembly.

  3.  Turn the ignition switch to the LOCK position.
  4.  Turn the ignition switch to the ON position.
  5.  Check the DTCs.

OK: DTC B1796 is not output.

HINT: Codes other than DTC B1796 may be output at this time, but they are not related to this check.

2 REPLACE OCCUPANT CLASSIFICATION ECU

  1. Turn the ignition switch to the LOCK position.
  2.  Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
  3.  Replace the occupant classification ECU

3 PERFORM ZERO POINT CALIBRATION

  1. Connect the negative (-) terminal cable to the battery.
  2.  Connect the intelligent tester to the DLC3.
  3.  Turn the ignition switch to the ON position.
  4.  Using the intelligent tester, perform "Zero point calibration".

OK: The "COMPLETED" is displayed.

4 PERFORM SENSITIVITY CHECK

  1. Using the intelligent tester, perform "Sensitivity check".

Standard values: 27 to 33 kg (59.52 to 72.75 lb)

END

Occupant Classification ECU Malfunction
DTC B1795 Occupant Classification ECU Malfunction DESCRIPTION DTC B1795 is recorded when a malfunction is detected in the occupant classification ECU. Troubleshoot DTC B1771 first when the DTCs ...

Trouble in Passenger Airbag ON / OFF Indicator
DESCRIPTION The occupant classification system detects the front passenger seat condition. It then informs a passenger of the front passenger airbag, the front seat side airbag RH and front seat ...

Other materials:

Installation
1. INSTALL OUTSIDE MOULDING Using a heat light, heat the mounting surface of the vehicle body between 40 to 60 C (104 to 140 F). NOTICE: Do not heat the body excessively. Remove the tape from the vehicle body. Wipe off the stains with cleaner. Clean the outside moulding (if reusing t ...

On-vehicle inspection
1. INSPECT STEERING PAD (VEHICLE NOT INVOLVED IN COLLISION)  Perform a diagnostic system check. With the steering pad installed on the vehicle, perform a visual check. If there are any defects as mentioned below, replace the steering pad with a new one: Cuts, minute cracks or ...

Removal
1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL 2. REMOVE ROOF HEADLINING ASSEMBLY HINT: Refer to the instructions for REMOVAL of the ROOF HEADLINING (See page IR-6). 3. REMOVE TIRE PRESSURE WARNING RECEIVER ASSEMBLY (a) Remove the bolt. (b) Disconnect the connector and remove the ...

В© 2011-2019 Copyright www.tsienna.net