Diagnostic Procedure

STEP	INSPECTION		ACTION
1	VERIFY BCM DTCs Clear the DTC using the M-MDS. (See CLEARING DTC [BCM] .) Perform the BCM DTC inspection using the M-MDS. (See DTC INSPECTION [BCM] .) Is the same DTC present?	Yes	Go to the next step.
1		No	Go to Step 9.
2	INSPECT RAIN SENSOR CONNECTOR AND TERMINALS Switch the ignition to off. Disconnect the negative battery cable. Disconnect the rain sensor connector. Inspect the connector and terminals (corrosion, damage, pin disconnection). Is there any malfunction?	Yes	Repair or replace the connector or terminals, then go to Step 8.
2		No	Go to the next step.
3	INSPECT BCM CONNECTOR AND TERMINALS Disconnect the BCM connector. Inspect the connector and terminals (corrosion, damage, pin disconnection). Is there any malfunction?	Yes	Repair or replace the connector or terminals, then go to Step 8.
3		No	Go to the next step.
4	INSPECT RAIN SENSOR COMMUNICATION CIRCUIT FOR SHORT TO GROUND Verify that the rain sensor and BCM connectors are disconnected. Inspect for continuity between rain sensor terminal A (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 8.
4		No	Go to the next step.
5	INSPECT RAIN SENSOR COMMUNICATION CIRCUIT FOR SHORT TO POWER SUPPLY Verify that the rain sensor and BCM connectors are disconnected. Reconnect the negative battery cable. Switch the ignition to ON. Measure the voltage at the rain sensor terminal A (wiring harness-side). Is there any voltage?	Yes	Repair or replace the wiring harness for a possible short to power supply, then go to Step 8.
5		No	Go to the next step.
6	INSPECT RAIN SENSOR COMMUNICATION CIRCUIT FOR OPEN CIRCUIT Verify that the rain sensor and BCM connectors are disconnected. Switch the ignition to off. Disconnect the negative battery cable. Inspect for continuity between rain sensor terminal A (wiring harness-side) and BCM terminal 5I (wiring harness-side). Is there continuity?	Yes	Go to the next step.
6		No	Repair or replace the wiring harness for a possible open circuit, then go to Step 8.
7	PERFORM DTC INSPECTION AND VERIFY THAT MALFUNCTIONING PART IS RAIN SENSOR Make sure to reconnect all disconnected connectors. Reconnect the negative battery cable. Clear the DTC using the M-MDS. (See CLEARING DTC [BCM] .) Perform the BCM DTC inspection using the M-MDS. (See DTC INSPECTION [BCM] .) Is the same DTC present?	Yes	Replace the rain sensor, then go to the next step. (See RAIN SENSOR REMOVAL/INSTALLATION .)
7		No	Go to Step 9.
8	VERIFY TROUBLESHOOTING COMPLETED Make sure to reconnect all disconnected connectors. Reconnect the negative battery cable. Clear the DTC using the M-MDS. (See CLEARING DTC [BCM] .) Perform the BCM DTC inspection using the M-MDS. (See DTC INSPECTION [BCM] .) Is the same DTC present?	Yes	Repeat the inspection from Step 1. If the malfunction recurs, replace the BCM. (See BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION .) Go to the next step.
8		No	Go to the next step.
9	VERIFY THAT NO OTHER DTCs ARE PRESENT Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [BCM] .)
9		No	DTC troubleshooting completed.