Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

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Component Inspection





Component Inspection

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. 1









fig. 1) 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 38.0% ± 3%, if fault 2 is detected.