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
Shifting the shift lever
While the engine switch is in the
“ON” position (vehicles without a
smart key system) or IGNITION ON mode (vehicles with a smart
key system), move the shift lever with the brake pedal
depressed.
When shifting the shift lever between P and D, make sure that the vehicle
is completely ...
Terminals of ECU
1. CHECK TRANSPONDER KEY AMPLIFIER
Disconnect the I14 amplifier connector and measure
the resistance between the terminal of the wire
harness side connector and body ground.
If the result is not as specified, there may be a
malfunction on the wire harness side.
Reconnec ...
Removal
1. REMOVE REAR DOOR SCUFF PLATE LH
2. REMOVE REAR DOOR WEATHERSTRIP LH
3. REMOVE BACK DOOR WEATHERSTRIP
4. REMOVE BACK DOOR SCUFF PLATE
5. REMOVE QUARTER TRIM FRONT PANEL ASSEMBLY LH
6. REMOVE VOLTAGE INVERTER ASSEMBLY
Disconnect the connector.
Remove the 2 bolts and the v ...