Schematic Reference: Keyless Entry Schematics

Connector End View Reference: Keyless Entry Connector End Views

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle

Important: Two or more keyless entry transmitters are required to ensure proper system diagnostics.

With each keyless entry transmitter, operate the keyless entry lock, unlock, and panic functions.

Do any of the available transmitters allow keyless entry function?

Go to Step 3

Go to Step 4

1. Remove the battery from the inoperative keyless entry transmitter.
2. With a DMM, measure the battery voltage.

Is the transmitter battery voltage greater than 2.8 volts?

Go to Step 11

Go to Step 10

1. Connect a scan tool to the vehicle.
2. Disconnect the remote control door lock receiver (RCDLR) electrical connector.
3. With a DMM, measure voltage at the keyless entry signal circuit.
4. With a scan tool, go to RFA Link Output in the BCM Miscellaneous Outputs menu.
5. Activate the RFA Link Output while observing the DMM.

Is voltage measured on the keyless entry signal circuit?

Go to Step 5

Go to Step 7

1. Disconnect the RCDLR electrical connector.
2. Connect a test lamp between the RCDLR battery positive voltage circuit and a good ground.

Does the test lamp illuminate?

Go to Step 6

Go to Step 13

At the RCDLR electrical connector, connect a test lamp between the RCDLR battery positive voltage circuit and the ground circuit.

Does the test lamp illuminate?

Go to Step 9

Go to Step 14

Test the keyless entry signal circuit for a short to ground or an open. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 17

Go to Step 8

Inspect for poor connections at the body control module (BCM). Refer to Testing for Intermittent Conditions and Poor Connections and Wiring Repairs .

Did you find and correct the condition?

Go to Step 17

Go to Step 15

Inspect for poor connections at the RCDLR. Refer to Testing for Intermittent Conditions and Poor Connections and Wiring Repairs .

Did you find and correct the condition?

Go to Step 17

Go to Step 16

Replace the transmitter battery. Refer to Transmitter Battery Replacement .

Did you complete the replacement?

Go to Step 17

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Replace the keyless entry transmitter.

Did you complete the replacement?

Go to Step 17

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Perform the transmitter programming procedure. Refer to Transmitter Programming .

Was the programming procedure completed successfully?

Go to Step 17

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Repair the open or short to ground in the battery positive voltage circuit. Refer to Circuit Testing and Wiring Repairs .

Did you complete the repair?

Go to Step 17

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Repair the open in the ground circuit. Refer to Circuit Testing and Wiring Repairs .

Did you complete the repair?

Go to Step 17

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Replace the BCM. Refer to Control Module References for replacement, setup, and programming information.

Did you complete the replacement?

Go to Step 17

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Replace the RCDLR. Refer to Control Module References for replacement, setup, and programming information.

Did you complete the replacement?

Go to Step 17

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Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2