DTC U2030 [AUTO LIGHT/WIPER CONTROL MODULE]


id0902j1833400

DESCRIPTION

Rain sensor communication fault

DETECTION CONDITION
•  Communication error between rain sensor and auto light/wiper control module.
POSSIBLE CAUSE
•  Rain sensor connector or terminals malfunction
•  Auto light/wiper control module connector or terminals malfunction
•  Short to ground in wiring harness between the rain sensor terminal C and auto light/wiper control module terminal U
•  Short to power supply in wiring harness between the rain sensor terminal C and auto light/wiper control module terminal U
•  Open circuit in wiring harness between the rain sensor terminal C and auto light/wiper control module terminal U
•  Rain sensor malfunction
•  Auto light/wiper control module malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION

1
INSPECT RAIN SENSOR CONNECTOR AND TERMINALS
•  Switch the ignition to off.
•  Disconnect the negative battery cable.
•  Disconnect the rain sensor connector.
•  Inspect the connector for poor connection (such as damaged/pulled-out pins, and corrosion).
•  Is there any malfunction?
Yes
Repair or replace the connector or terminals, then go to Step 7.
No
Go to the next step.
2
INSPECT AUTO LIGHT/WIPER CONTROL MODULE CONNECTOR AND TERMINALS
•  Disconnect the auto light/wiper control module connector.
•  Inspect the connector for poor connection (such as damaged/pulled-out pins, and corrosion).
•  Is there any malfunction?
Yes
Repair or replace the connector or terminals, then go to Step 7.
No
Go to the next step.
3
INSPECT RAIN SENSOR SIGNAL CIRCUIT FOR SHORT TO GROUND
•  Rain sensor and auto light/wiper control module connectors are disconnected.
•  Inspect for continuity between the rain sensor terminal C (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 7.
No
Go to the next step.
4
INSPECT RAIN SENSOR SIGNAL CIRCUIT FOR SHORT TO POWER SUPPLY
•  Rain sensor and auto light/wiper control module connectors are disconnected.
•  Reconnect the negative battery cable.
•  Switch the ignition to ON.
•  Measure the voltage between the rain sensor terminal C (wiring harness-side) and body ground.
•  Is there any voltage?
Yes
Repair or replace the wiring harness for a possible short to power supply, then go to Step 7.
No
Go to the next step.
5
INSPECT RAIN SENSOR SIGNAL CIRCUIT FOR OPEN CIRCUIT
•  Rain sensor and auto light/wiper control module connectors are disconnected.
•  Switch the ignition to off.
•  Disconnect the negative battery cable.
•  Inspect for continuity between the rain sensor terminal C (wiring harness-side) and auto light/wiper control module terminal U (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 7.
6
VERIFY RAIN SENSOR MALFUNCTION
•  Make sure to reconnect all disconnected connectors.
•  Reconnect the negative battery cable.
•  Clear the DTC using the M-MDS.
•  Perform the auto light/wiper control module DTC inspection using the M-MDS.
•  Is the same DTC present?
Yes
Replace the rain sensor, then go to the next step.
No
Go to Step 8.
7
VERIFY TROUBLESHOOTING COMPLETED
•  Make sure to reconnect all disconnected connectors.
•  Reconnect the negative battery cable.
•  Clear the DTC using the M-MDS.
•  Perform the auto light/wiper control module DTC inspection using the M-MDS.
•  Is the same DTC present?
Yes
Replace the auto light/wiper control module, then go to the next step.
No
Go to the next step.
8
VERIFY THAT NO OTHER DTCs ARE RECORDED
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
No
DTC troubleshooting completed.