DTC B1794 Open in Occupant Classification ECU Battery Positive Line
DESCRIPTION
This circuit consists of the occupant classification ECU and the power source circuit (battery, fuse, wire harness).
DTC B1794 is recorded when a malfunction is detected in the occupant classification ECU or the power source circuit.
HINT: When DTC B1794 is output after switching the ignition switch LOCK-ON-LOCK 50 times in a row when a malfunction occurs in the power circuit for the occupant classification system, the DTC is output again when a malfunction is detected even once after being cleared, unless the normal system code is input.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 CHECK BATTERY
Standard: 11 to 14 V
2 CHECK FUSE
Standard: Below 1 Ω
3 CHECK WIRE HARNESS
Standard voltage
Standard resistance
4 CHECK DTC
HINT: First clear DTCs stored in the occupant classification ECU and then in the center airbag sensor assembly.
OK: DTC B1794 is not output.
HINT: Codes other than code B1794 may be output at this time, but they are not related to this check.
USE SIMULATION METHOD TO CHECK
5 REPLACE OCCUPANT CLASSIFICATION ECU
6 PERFORM ZERO POINT CALIBRATION
OK: The "COMPLETED" is displayed.
7 PERFORM SENSITIVITY CHECK
Standard value: 27 to 33 kg (59.52 to 72.75 lb)
END
Installation
1. INSTALL TRANSFER ASSEMBLY
(a) Apply sealant 1281 to the transaxle assembly and
transfer assembly in continuous beaded from of 1.2
mm diameter as shown in the illustration.
NOTICE:
Wipe any grease off from the attaching
surfaces.
Install it within 10 minutes after applying the
se ...
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 &q ...
Door control transmitter
INSPECTION
1. INSPECT DOOR CONTROL TRANSMITTER
Inspect operation of the transmitter.
Remove the battery (lithium battery) from the transmitter.
Install a new or normal battery (lithium battery).
When a new or normal battery is not available,
connect 2 new ...