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.

DTC No.

DTC Detecting Condition

Trouble Area

B1796

  • Occupant classification ECU malfunction
  • Occupant classification ECU

INSPECTION PROCEDURE

1 CHECK DTC

  1. Turn the ignition switch to the ON position.
  2.  Clear the DTCs stored in memory (35).

    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 (35).

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" (28).

OK: The "COMPLETED" is displayed.

4 PERFORM SENSITIVITY CHECK

  1. Using the intelligent tester, perform "Sensitivity check" (28).

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:

Open in Curtain Shield Squib RH Circuit
DTC B1161/84 Open in Curtain Shield Squib RH Circuit DESCRIPTION The curtain shield squib RH circuit consists of the center airbag sensor assembly and the curtain shield airbag assembly RH. The circuit instructs the SRS to deploy when deployment conditions are met. DTC B1161/84 is recorde ...

Catalyst monitor (active air-fuel ratio control type)
(a) Preconditions The monitor will not run unless: The MIL is OFF. (b) Drive Pattern (1) Connect an intelligent tester. (2) Turn the ignition switch to the ON position. (3) Turn the tester or scan tool ON. (4) Clear the DTCs. (5) Start the engine and warm it up. (6) Drive ...

Air outlet control servo motor (for rear air conditioning system)
ON-VEHICLE INSPECTION 1. INSPECT REAR AIR OUTLET CONTROL SERVO MOTOR (a) Inspect servo motor operation. (1) Connect the positive (+) lead from the battery to terminal 4 and negative (-) lead to terminal 5, then check that the arm turns to "FOOT" side smoothly. (2) Connect t ...

В© 2011-2021 Copyright www.tsienna.net