DTC U2030 [AUTO LIGHT/WIPER CONTROL MODULE]

id0902j1833400

DTC U2030

Rain sensor communication fault
DETECTION CONDITION
Communication error to rain sensor
POSSIBLE CAUSE
•  Open circuit 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
•  Short to GND 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

Diagnostic procedure

STEP

INSPECTION

ACTION
1
INSPECT RAIN SENSOR CONNECTOR
•  Turn the ignition switch to LOCK position.
•  Disconnect the rain sensor connector.
•  Inspect the rain sensor connector terminals for poor connection (such as damaged/pulled-out pins, and corrosion).
•  Is there any malfunction?
Yes
Repair or replace the terminal, then go to Step 6.
No
Go to the next step.
2
INSPECT AUTO LIGHT/WIPER CONTROL MODULE CONNECTOR
•  Disconnect the auto light/wiper control module connector.
•  Inspect the auto light/wiper control module connector terminal for poor connection (such as damaged/pulled-out pins, and corrosion).
•  Is there any malfunction?
Yes
Repair or replace the terminal, then go to Step 6.
No
Go to the next step.
3
INSPECT RAIN SENSOR CIRCUIT FOR OPEN CIRCUIT
•  Inspect for continuity between auto light/wiper control module terminal 2E (wiring harness-side) and rain sensor terminal C (wiring harness-side).
•  Is there continuity?
Yes
Go to the next step.
No
Repair or replace the wiring harness for a possible open circuit, then go to Step 6.
4
INSPECT RAIN SENSOR SIGNAL CIRCUIT FOR SHORT TO GND
•  Inspect for continuity between auto light/wiper control module terminal 2E (wiring harness-side) and body GND.
•  Is there continuity?
Yes
Repair or replace the wiring harness for a possible short to GND, then go to Step 6.
No
Go to the next step.
5
INSPECT RAIN SENSOR SIGNAL CIRCUIT FOR SHORT TO POWER SUPPLY
•  Turn the ignition switch to the ON position (Engine off).
•  Measure the voltage between auto light/wiper control module terminal 2E (wiring harness-side) and body GND.
•  Is the voltage B+?
Yes
Repair or replace the wiring harness for a possible short to power supply, then go to the next step.
No
Replace the Rain sensor, then go to the next step.
(See RAIN SENSOR REMOVAL/INSTALLATION.)
6
VERIFY TROUBLESHOOTING COMPLETED
•  Make sure to reconnect all disconnected connectors.
•  Clear the DTC from the auto light/wiper control module memory using the M-MDS.
•  Turn the ignition switch to LOCK position then ON position.
•  Is the same DTC present?
Yes
Replace the auto light/wiper control module.
(See AUTO LIGHT/WIPER CONTROL MODULE REMOVAL/INSTALLATION.)
No
DTC troubleshooting completed.