1. Turn the headlamp switch to the HEAD position.
2. Observe the headlamps.

Are the headlamps ON?

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Go to Step 2

Go to Diagnostic System Check - Lighting Systems in Lighting

1. Turn the headlamps to the OFF position.
2. Momentarily press the horn switch.

Does the horn sound?

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Go to Step 3

Go to Horns System Check in Horns

Has a Keyless Entry Diagnostic System Check been performed?

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Go to Step 4

Go to Remote Keyless Entry System Check

1. Remove the key from the ignition key lock cylinder.
2. Close all of the vehicle doors.
3. Press the LOCK button on the keyless entry transmitter 1 time, while observing the door locks.
4. Press the UNLOCK button on the keyless entry transmitter 2 times, while observing the door locks.

Does the keyless entry system operate the door locks?

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Go to Step 5

Go to Remote Keyless Entry System Check

1. Set the remote unlock verification to mode 4. Refer to Remote Activation Verification (RAV) Customization .
2. Set the remote lock verification to mode 4. Refer to Remote Activation Verification (RAV) Customization .
3. Press the LOCK button on the keyless entry transmitter, while observing the headlamps and listening to the horn.
4. Press the UNLOCK button on the keyless entry transmitter, while observing the headlamps and listening to the horn.

Does the horn sound and the headlamps flash upon pressing the LOCK button and the UNLOCK button on the keyless entry transmitter?

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System OK

Go to Step 6

1. Replace the BCM. Refer to Body Control Module Replacement in Body Control System.
2. Perform the Setup New BCM procedure. Refer to Body Control Module (BCM) Programming/RPO Configuration in Body Control System.

Is the repair complete?

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Go to Step 7

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1. Turn the ignition switch to the LOCK position.
2. Reconnect the connectors and install the components that were removed.

Have all the repairs been made?

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Go to Remote Keyless Entry System Check

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