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 KEYLESS RECEIVER CONNECTOR AND TERMINALS Switch the ignition to off. Disconnect the negative battery cable. Disconnect the keyless receiver 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 KEYLESS RECEIVER COMMUNICATION CIRCUIT FOR SHORT TO GROUND Verify that the keyless receiver and BCM connectors are disconnected. Inspect for continuity between keyless receiver terminal D (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 KEYLESS RECEIVER COMMUNICATION CIRCUIT FOR SHORT TO POWER SUPPLY Verify that the keyless receiver and BCM connectors are disconnected. Reconnect the negative battery cable. Switch the ignition to ON. Measure the voltage at the keyless receiver terminal D (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 KEYLESS RECEIVER COMMUNICATION CIRCUIT FOR OPEN CIRCUIT Verify that the keyless receiver and BCM connectors are disconnected. Switch the ignition to off. Disconnect the negative battery cable. Inspect for continuity between keyless receiver terminal D (wiring harness-side) and BCM terminal 4K (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	INSPECT KEYLESS RECEIVER Inspect the keyless receiver. (See KEYLESS RECEIVER INSPECTION .) Is there any malfunction?	Yes	Replace the keyless receiver, then go to the next step. (See KEYLESS RECEIVER REMOVAL/INSTALLATION .)
7		No	Go to the next step.
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.