DTC U2030 [AUTO LIGHT/WIPER CONTROL MODULE]

id0902j1833400

DTC U2030

Rain sensor/auto light sensor communication fault

DETECTION CONDITION

Communication error to rain sensor/auto light sensor

POSSIBLE CAUSE

•  Open circuit in wiring harness between auto light/wiper control module terminal U and rain sensor/auto light sensor terminal C

•  Short to power supply in wiring harness between auto light/wiper control module terminal U and rain sensor/auto light sensor terminal C

•  Short to ground in wiring harness between auto light/wiper control module terminal U and rain sensor/auto light sensor terminal C

•  Rain sensor/auto light sensor malfunction

•  Auto light/wiper control module malfunction

DTC U2030	Rain sensor/auto light sensor communication fault
DETECTION CONDITION	Communication error to rain sensor/auto light sensor
POSSIBLE CAUSE	• Open circuit in wiring harness between auto light/wiper control module terminal U and rain sensor/auto light sensor terminal C • Short to power supply in wiring harness between auto light/wiper control module terminal U and rain sensor/auto light sensor terminal C • Short to ground in wiring harness between auto light/wiper control module terminal U and rain sensor/auto light sensor terminal C • Rain sensor/auto light sensor malfunction • Auto light/wiper control module malfunction

Diagnostic procedure

STEP	INSPECTION		ACTION
1	INSPECT RAIN SENSOR/AUTO LIGHT SENSOR CONNECTOR • Switch the ignition to off. • Disconnect the negative battery cable. • Disconnect the rain sensor/auto light sensor connector. • Inspect the rain sensor/auto light 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.
1		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.
2		No	Go to the next step.
3	INSPECT RAIN SENSOR/AUTO LIGHT SENSOR CIRCUIT FOR OPEN CIRCUIT • Inspect for continuity between auto light/wiper control module terminal U (wiring harness-side) and rain sensor/auto light sensor terminal C (wiring harness-side). • Is there continuity?	Yes	Go to the next step.
3		No	Repair or replace the wiring harness for a possible open circuit, then go to Step 6.
4	INSPECT RAIN SENSOR/AUTO LIGHT SENSOR SIGNAL CIRCUIT FOR SHORT TO GROUND • Inspect for continuity between auto light/wiper control module terminal U (wiring harness-side) and body ground. • Is there continuity?	Yes	Repair or replace the wiring harness for a possible short to ground, then go to Step 6.
4		No	Go to the next step.
5	INSPECT RAIN SENSOR/AUTO LIGHT SENSOR SIGNAL CIRCUIT FOR SHORT TO POWER SUPPLY • Connect the negative battery cable. • Switch the ignition to ON (engine off). • Measure the voltage between auto light/wiper control module terminal U (wiring harness-side) and body ground. • Is the voltage B+?	Yes	Repair or replace the wiring harness for a possible short to power supply, then go to the next step.
5		No	Replace the rain sensor/auto light sensor, then go to the next step. (See RAIN SENSOR REMOVAL/INSTALLATION.)
6	VERIFY TROUBLESHOOTING COMPLETED • Make sure to reconnect all disconnected connectors. • Clear DTCs using the M-MDS. (See CLEARING DTC [AUTO LIGHT/WIPER CONTROL MODULE].) • Perform the auto light/wiper control module DTC inspection using the M-MDS. (See DTC INSPECTION [AUTO LIGHT/WIPER CONTROL MODULE].) • Is DTC U2030 displayed?	Yes	Replace the auto light/wiper control module. (See AUTO LIGHT/WIPER CONTROL MODULE REMOVAL/INSTALLATION.)
6		No	DTC troubleshooting completed.