Automatic Seat Belt Control Unit Input/Output Signals

Fig. 12 Power Supply & Ground Circuit Test:

POWER SUPPLY AND GROUND CIRCUIT

NOTE: H and L in the voltage level column indicate the terminal voltage of each signal.
H: Battery voltage
L: Ground voltage (O.8V or less)








INPUT SIGNALS
Input signals (to the computer) corresponding to the ON/OFF condition of each of the switches and sensors are as shown in the table above.

Note that the checking should be done with the ignition key at the ON position, otherwise the correct voltage measurement might not be obtained.

OUTPUT SIGNALS
Signals output from the computer in accordance with changes of input signals are as shown in the tables below.





1. Buzzer drive (terminal No. 14)





2. Fasten seat belt indicator light drive (terminal No. 20)





3. Spool release indicator light drive (terminal No. 19)





4. Motor (shoulder belt release side: terminal No. 7 - driver's side and terminal No. 4 - passenger 5 side)





5. Motor (shoulder belt fasten side: terminal No. 10 - driver's side and terminal No. 1 - passenger's side)