3.
Measure waveform between terminal "C3" of BCM and chassis ground.
a.
Specification : Refer the specifications in fig3)
Connect scantool to Data Link Connector(DLC).
Ignition "ON" & engine "OFF" & wiper "AUTO"
Measure waveform between terminal "C3" of BCM and chassis ground.
Specification : Refer the specifications in fig3)
Is the measured waveform within specifications?
YES
Go to "Check Rainsensor" procedure.
NO
Substitute with a known-good BCM and check for proper operation.
If the problem is corrected, replace BCM and then go to "Verification of Vehicle Repair" procedure.
Connect scantool to Data Link Connector(DLC).
Ignition "ON" & engine "OFF" & wiper "AUTO".
Measure waveform between terminal "4" of rainsensor and chassis ground while sprinkling water on front window glass.
Specification : Duty cycle > 66.7% ± 3%
Mode | Duty Cycle |
OFF | 9.5% ± 3% |
Fault 1 Detected | 23.8% ± 3% |
Fault 2 Detected | 38.0% ± 3% |
Fault 3 Detected | 52.4% ± 3% |
Rain Detected | 66.7% ± 3% |
Low Speed Request | 81.0% ± 3% |
High Speed Request | 95.2% ± 3% |
FIG 2) Duty cycle of rainsensor as a function of sensor mode.
Is the measured waveform within specifications?
※ Duty cycle value will be fixed at 95.2%±3%, if fault 3 is detected.
YES
Check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to "Verification of Vehicle Repair" procedure.
NO
Substitute with a known-good rainsensor and check for proper operation.
If the problem is corrected, replace rainsensor and then go to "Verification of Vehicle Repair" procedure.
