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
Parking Brake Switch Circuit
DESCRIPTION
This circuit is from the parking brake switch to the radio and navigation
assembly.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 CHECK BRAKE WARNING LIGHT
Check that the brake warning light comes on when the
parking brake is applied and goes off when it is released.
OK:
The ...
Removal
1. DISCONNECT BATTERY NEGATIVE TERMINAL
2. REMOVE FRONT DOOR SCUFF PLATE LH
HINT:
(See page IP-6)
3. REMOVE FRONT DOOR SCUFF PLATE RH
HINT:
(See page IP-6)
4. REMOVE COWL SIDE TRIM BOARD LH
HINT:
(See page IP-6)
5. REMOVE COWL SIDE TRIM BOARD RH
HINT:
(See page IP-6)
6. REMOVE INSTRUMEN ...
Terminals of ECU
1. CLEARANCE WARNING ECU
*1: with Front Clearance Sonar
2. AIR CONDITIONER AMPLIFIER ASSEMBLY
*1: with Front Clearance Sonar
*2: Manual A/C
*3: Auto A/C
Reference: waveform 1
HINT:
Terminal: CBZ - E, BBZ - E, Z- - Body ground
Gauge set: 2 ...