Mazda RX-8 Workshop Manual page 3170

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2011 - RX-8 - Body and Accessories
DTC U2030 [AUTO LIGHT/WIPER CONTROL MODULE]
DTC U2030 Rain sensor communication fault
DETECTION Communication error to rain sensor
CONDITION
POSSIBLE
CAUSE
Rain sensor connector malfunction
Auto light/wiper control module connector malfunction
Open circuit in wiring harness between auto light/wiper control module
terminal 2E and rain sensor terminal C
Short to GND in wiring harness between auto light/wiper control module
terminal 2E and rain sensor terminal C
Short to power supply in wiring harness between auto light/wiper
control module terminal 2E and rain sensor terminal C
Rain sensor malfunction
Auto light/wiper control module malfunction