DTC U2030 [AUTO LIGHT/WIPER CONTROL MODULE]

id0902j1833400

Description | Communication error with auto light sensor/rain sensor
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Detection condition | • Auto light/wiper control module detects the communication error with the auto light sensor/rain sensor.
Possible cause | • Auto light sensor/rain sensor connector or terminal malfunction • Auto light/wiper control module connector or terminal malfunction • Short to ground in wiring harness between auto light sensor/rain sensor terminal C and auto light/wiper control module terminal 2E • Short to power supply in wiring harness between auto light sensor/rain sensor terminal C and auto light/wiper control module terminal 2E • Open circuit in wiring harness between auto light sensor/rain sensor terminal C and auto light/wiper control module terminal 2E • Auto light sensor/rain sensor malfunction • Auto light/wiper control module malfunction

Diagnostic procedure

Step | Inspection | Action
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1 | INSPECT AUTO LIGHT SENSOR/RAIN SENSOR CONNECTOR • Turn the ignition switch to the OFF position. • Disconnect the negative battery cable. (See BATTERY REMOVAL/INSTALLATION [MZI-3.7].) • Disconnect the auto light sensor/rain sensor connector. • Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection. • Is there any malfunction? | Yes | Repair or replace the connector, then go to Step 7.
No | Go to the next step.
2 | INSPECT AUTO LIGHT/WIPER CONTROL MODULE CONNECTOR • Disconnect the auto light/wiper control module connector. • Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection. • Is there any malfunction? | Yes | Repair or replace the connector, then go to Step 7.
No | Go to the next step.
3 | INSPECT FOR SHORT TO GROUND IN AUTO LIGHT SENSOR/RAIN SENSOR CIRCUIT • Verify that the auto light sensor/rain sensor and auto light/wiper control module connectors are disconnected. • Inspect for continuity between auto light sensor/rain sensor terminal C (wiring harness-side) and body ground. • Is there continuity? | Yes | Repair or replace the wiring harness which has a short to ground, then go to Step 7.
No | Go to the next step.
4 | INSPECT FOR SHORT TO POWER SUPPLY IN AUTO LIGHT SENSOR/RAIN SENSOR CIRCUIT • Verify that the auto light sensor/rain sensor and auto light/wiper control module connectors are disconnected. • Reconnect the negative battery cable. (See BATTERY REMOVAL/INSTALLATION [MZI-3.7].) • Turn the ignition switch to the ON position. • Measure the voltage at the auto light sensor/rain sensor terminal C (wiring harness-side). • Is the voltage 0 V? | Yes | Go to the next step.
No | Repair or replace the wiring harness which has a short to power supply, then go to Step 7.
5 | INSPECT FOR OPEN CIRCUIT IN AUTO LIGHT SENSOR/RAIN SENSOR CIRCUIT • Verify that the auto light sensor/rain sensor and auto light/wiper control module connectors are disconnected. • Turn the ignition switch to the OFF position. • Disconnect the negative battery cable. (See BATTERY REMOVAL/INSTALLATION [MZI-3.7].) • Inspect for continuity between auto light sensor/rain sensor terminal C (wiring harness-side) and auto light/wiper control module terminal 2E (wiring harness-side). • Is there continuity? | Yes | Go to the next step.
No | Repair or replace the wiring harness which has an open circuit, then go to Step 7.
6 | PERFORM DTC INSPECTION AND VERIFY AUTO LIGHT SENSOR/RAIN SENSOR MALFUNCTION • Make sure to reconnect all disconnected connectors. • Reconnect the negative battery cable. (See BATTERY REMOVAL/INSTALLATION [MZI-3.7].) • Clear the DTC for the auto light/wiper control module using the M-MDS. (See CLEARING DTC [AUTO LIGHT/WIPER CONTROL MODULE].) • Retrieve the auto light/wiper control module DTCs using the M-MDS. (See DTC INSPECTION [AUTO LIGHT/WIPER CONTROL MODULE].) • Is the same DTC displayed? | Yes | Replace the auto light sensor/rain sensor, then go to the next step. (See RAIN SENSOR REMOVAL/INSTALLATION.)
No | Go to Step 8.
7 | VERIFY DTC TROUBLESHOOTING COMPLETED • Make sure to reconnect all disconnected connectors. • Reconnect the negative battery cable. (See BATTERY REMOVAL/INSTALLATION [MZI-3.7].) • Clear the DTC for the auto light/wiper control module using the M-MDS. (See CLEARING DTC [AUTO LIGHT/WIPER CONTROL MODULE].) • Retrieve the auto light/wiper control module DTCs using the M-MDS. (See DTC INSPECTION [AUTO LIGHT/WIPER CONTROL MODULE].) • Is the same DTC displayed? | Yes | Repeat the inspection from Step 1. • If the malfunction recurs, replace the auto light/wiper control module. (See AUTO LIGHT/WIPER CONTROL MODULE REMOVAL/INSTALLATION.) Go to the next step.
No | Go to the next step.
8 | VERIFY IF OTHER DTCs DISPLAYED • Are any other DTCs displayed? | Yes | Repair or replace the malfunctioning part according to the applicable DTC troubleshooting. (See DTC TABLE [AUTO LIGHT/WIPER CONTROL MODULE].)
No | DTC troubleshooting completed.