B1788

DTC B1788 OCCUPANT CLASSIFICATION SENSOR REAR RH COLLISION DETECTION

CIRCUIT DESCRIPTION

DTC Detecting Condition:

DTC B1788 is output when the occupant classification ECU receives a collision detection signal sent by the occupant classification sensor rear RH if an accident occurs.

DTC B1788 is also output when the front RH seat assy is subjected to a strong impact, even if an actual accident does not occur.

However, when the occupant classification ECU outputs a collision detection signal, even if the vehicle is not in a collision, DTC B1788 can be cleared by "Zero point calibration" and "Sensitivity check".

Therefore, if DTC B1788 is output, first perform "Zero point calibration" and "Sensitivity check".

HINT:
- When DTC B1650/32 is detected as a result of troubleshooting for the supplemental restraint system, perform troubleshooting for DTC B1788 of the occupant classification system.
- Use the hand-held tester to check the DTC of the occupant classification ECU, otherwise the DTC cannot be read.

Wiring Diagram:

Step 1-2:

Step 3-5:

Step 6-9:

Step 10:

INSPECTION PROCEDURE