DTC U2030

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DTC U2030

B3E090201072W53

DTC U2030 | Rain sensor communication fault
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DETECTION CONDITION | Communication error to rain sensor

POSSIBLE CAUSE

• Open circuit in wiring harness between PJB terminal J-06 AD and rain sensor terminal C
• Short to power supply in wiring harness between PJB terminal J-06 AD and rain sensor terminal C
• Short to GND in wiring harness between PJB terminal J-06 AD and rain sensor terminal C
• Rain sensor malfunction
• PJB malfunction

Diagnostic procedure

STEP | INSPECTION | ACTION
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1 | INSPECT RAIN SENSOR CONNECTOR • Turn the ignition switch off. • 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 PJB CONNECTOR • Disconnect the PJB connector. • Inspect the PJB 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.
3 | INSPECT RAIN SENSOR CIRCUIT FOR OPEN CIRCUIT • Inspect for continuity between PJB terminal J-06 AD (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 PJB terminal J-06 AD (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 PJB terminal J-06 AD (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 PJB memory using the WDS or equivalent.
• Perform the self-test.
(See PJB SELF-TEST.)
• Is the same DTC present?

Yes

Replace the PJB.
(See PASSENGER JUNCTION BOX (PJB) REMOVAL/INSTALLATION.)

No | Troubleshooting completed.