Component Inspection

Body Control

Body Control Module - B1907 Rain Sensor Fault 3 Component Inspection

Component Inspection

Check BCM
1. Connect scantool to Data Link Connector (DLC).
2. Ignition "ON" & engine "OFF" & wiper "AUTO"
3. Measure waveform between terminal "C3" of BCM and chassis ground.

Specification : Refer the specifications in fig.2)









Fig.2) The Signal waveform of BCM output signal (BCM to Rain sensor)
4. Is the measured waveform within specifications?





Check Rain sensor
1. Connect scantool to Data Link Connector (DLC).
2. Ignition "ON" & engine "OFF" & wiper "AUTO".
3. Measure waveform between terminal "4" of rain sensor and chassis ground while sprinkling water on front window glass.

Specification : Duty cycle > 66.7% ± 3%





Fig.3









FIG.3) Duty cycle of rain sensor as a function of sensor mode.
4. Is the measured waveform within specifications?
** Duty cycle value will be fixed at 95.2%±3%, if fault 3 is detected.