DTC U2030 [AUTO LIGHT/WIPER CONTROL MODULE]
id0902j1833400
DESCRIPTION |
Rain sensor communication fault |
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DETECTION CONDITION
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• Communication error between rain sensor and auto light/wiper control module.
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POSSIBLE CAUSE
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• 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
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Diagnostic procedure
STEP |
INSPECTION |
ACTION |
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1
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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?
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Yes
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Repair or replace the connector or terminals, then go to Step 7.
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No
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Go to the next step.
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2
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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?
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Yes
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Repair or replace the connector or terminals, then go to Step 7.
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No
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Go to the next step.
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3
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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?
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Yes
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Repair or replace the wiring harness for a possible short to ground, then go to Step 7.
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No
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Go to the next step.
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4
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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?
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Yes
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Repair or replace the wiring harness for a possible short to power supply, then go to Step 7.
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No
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Go to the next step.
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5
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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?
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Yes
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Go to the next step.
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No
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Repair or replace the wiring harness for a possible open circuit, then go to Step 7.
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6
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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?
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Yes
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Replace the rain sensor, then go to the next step.
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No
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Go to Step 8.
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7
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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?
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Yes
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Replace the auto light/wiper control module, then go to the next step.
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No
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Go to the next step.
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8
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VERIFY THAT NO OTHER DTCs ARE RECORDED
• Are any DTCs present?
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Yes
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Go to the applicable DTC inspection.
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No
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DTC troubleshooting completed.
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