Toyota Corolla Cross: System Description
SYSTEM DESCRIPTION
SEAT BELT WARNING SYSTEM DESCRIPTION
(a) Seat belt warning light operation for driver seat belt:
The seat belt warning light on the combination meter assembly illuminates, blinks or turns off in accordance with the driver seat belt state, vehicle speed, shift lever position and parking brake state.
(b) Seat belt warning light operation for front passenger seat belt:
The seat belt warning light on the combination meter assembly illuminates, blinks or turns off in accordance with whether the front passenger seat is occupied, the front passenger seat belt state, vehicle speed, shift lever position and parking brake state.
(c) Rear seat belt warning light:
The rear seat belt warning light on the combination meter assembly illuminates, blinks or turns off in accordance with the vehicle speed and rear seat belt state.
(d) Front seat belt warning buzzer:
After turning the ignition switch to ON, if the driver seat belt is not fastened within 1.8 seconds, the seat belt warning buzzer in the combination meter assembly will sound at an interval of 1.2 seconds for 6 seconds.
When the vehicle is driven at approximately 20 km/h (12 mph) or more with the front passenger seat occupied and the driver or front passenger seat belt not fastened, the seat belt warning buzzer in the combination meter assembly will sound once.
When 18 seconds have passed after the buzzer sounded, the seat belt warning buzzer in the combination meter assembly will sound at an interval of 1.2 seconds for 6 seconds.
After that, the seat belt warning buzzer in the combination meter assembly will sound at an interval of 0.4 seconds for 100 seconds.
(e) Rear seat belt warning buzzer:
When the vehicle is driven at approximately 20 km/h (12 mph) or more with a rear seat belt not fastened, the seat belt warning buzzer in the combination meter assembly will sound at an interval of 1.2 seconds for 6 seconds.
After that, the seat belt warning buzzer in the combination meter assembly will sound at an interval of 0.4 seconds for 66 seconds.
FUNCTION OF MAIN COMPONENTS
|
Component | Function |
|---|---|
|
Front seat inner belt assembly LH | Informs the combination meter assembly of the driver seat belt condition (fastened or unfastened). |
|
Front seat inner belt assembly RH | Informs the airbag ECU assembly of the front passenger seat belt condition (fastened or unfastened). |
| Informs the airbag ECU assembly of the front passenger seat condition (occupied or unoccupied). |
| Informs the combination meter assembly of each rear seat belt condition (fastened or unfastened). |
|
Rear door courtesy light switch assembly (LH/RH) |
Informs the main body ECU (multiplex network body ECU) of the rear door condition (open or closed). |
|
Combination meter assembly |
|
| Airbag ECU assembly |
Sends the front passenger seat belt buckle switch signal and occupant detection signal to the combination meter assembly via CAN communication. |
|
Main body ECU (multiplex network body ECU) | Sends the rear door courtesy switch signal to the combination meter assembly via CAN communication. |
|
Skid control ECU (brake actuator assembly) |
|
| Hybrid vehicle control ECU*1 |
Sends the shift position signal to the combination meter assembly via CAN communication. |
|
ECM*2 |
- *1: for HEV Model
- *2: for Gasoline Model
READ NEXT:
How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT
HINT:
Use the following procedure to troubleshoot the seat belt warning system.
*: Use the GTS.
PROCEDURE
1. VEHICLE BROUGHT TO WORKSHOP
Customize Parameters
CUSTOMIZE PARAMETERS
NOTICE:
When the customer requests a change in a function, first make sure that the function can be customized.
Be sure to make a note of the current settings before cu
Problem Symptoms Table
PROBLEM SYMPTOMS TABLE NOTICE: When replacing the combination meter assembly, always replace it with a new one. If a combination meter assembly which was installed to another vehicle is used, the info
SEE MORE:
Dtc Check / Clear
DTC CHECK / CLEAR NOTICE: When the diagnosis system is changed from normal mode to check mode or vice versa, all DTCs and Freeze Frame Data recorded in normal mode are cleared. Before changing modes, always check and make a note of DTCs and Freeze Frame Data.
HINT:
DTCs which are stored in the
On-vehicle Inspection
ON-VEHICLE INSPECTION CAUTION / NOTICE / HINT
HINT:
Steps 2 to 9 specify the procedure to determine the cause of a refrigerant leak.
Step 10 specifies the procedure to check if there is a clog in the expansion valve.
PROCEDURE 1. INSPECT REFRIGERANT PRESSURE WITH MANIFOLD GAUGE SET
