Keyless Entry System Inoperative. Cadillac SLS 2009

For 1990-2009 cars only

Makes 🢒 Cadillac 🢒 2009 🢒 SLS 🢒 Engine 🢒 Engine Electrical 🢒 Keyless Entry System Inoperative

Keyless Entry System Inoperative Active

Step	Action	Yes	No
Schematic Reference: Remote Function Schematics Connector End View Reference: Remote Function Connector End Views
1	Did you perform the Diagnostic System Check - Vehicle?	Go to Step 2	Go to Diagnostic System Check - Vehicle
2	Press each button of the transmitter one at a time. Is the system OK?	Go to Testing for Intermittent Conditions and Poor Connections	Go to Step 3
3	Use the vehicle interior controls to perform the Lock and Unlock operation on the door lock. Is the door lock operating normally?	Go to Step 4	Go to Symptoms - Doors
4	Operate the rear compartment release and the fuel door release from the controls inside the vehicle. Does the rear compartment release and the fuel door release operate properly?	Go to Step 5	Go to Symptoms - Body Rear End
5	Important: Ensure that the keyless entry transmitter is the correct model for the vehicle remote system. A wrong model transmitter may pass this test, but will not activate the keyless entry system. Turn on the J 43241 Keyless Entry Tester. Place the transmitter on the J 43241 test pad. Press each button of the transmitter one at a time. Does a tone sound and the green light illuminate on the J 43241 after each button is pressed?	Go to Step 10	Go to Step 6
6	Do any of the buttons on the transmitter sound the tone and illuminate the green light when pressed?	Go to Step 9	Go to Step 7
7	Replace the transmitter battery. Refer to Transmitter Battery Replacement . Is the replacement complete?	Go to Step 8	--
8	Turn ON the J 43241 . Place the transmitter on the J 43241 test pad. Press each button of the transmitter one at a time. Does a tone sound and the green light illuminate on the J 43241 after each button is pressed?	Go to Step 10	Go to Step 9
9	Replace the keyless entry transmitter. Refer to Transmitter Programming . Is the replacement complete?	Go to Step 10	--
10	Perform the programming procedure. Refer to Transmitter Programming . Does the DIC sound a chime and display the Programming Next Key Available to Begin information?	Go to Step 12	Go to Step 11
11	Replace the remote control door lock receiver (RCDLR). Refer to Control Module References for replacement, setup, and programming. Did you complete the replacement?	Go to Step 12	--
12	Operate the system to verify the repair. Is the failure removed?	System OK	Go to Step 3

Keyless Entry System Inoperative Passive

Step

Action

Yes

Schematic Reference: Remote Function Schematics

Connector End View Reference: Remote Function Connector End Views

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle

Approach the vehicle with the keyless entry transmitter and attempt to open each door and the rear compartment.

Do all doors and the rear compartment open?

Go to Testing for Intermittent Conditions and Poor Connections

Go to Step 3

Do any doors or the rear compartment open?

Go to Step 4

Go to Step 5

Important:

•	The voltage signal sent by the remote control door lock receiver (RCDLR) to the passive antenna is an AC voltage signal. The DMM must be set on AC voltage setting to record the voltage pulse to the passive antenna.

•	Use a DMM to record the voltage pulse using the MIN MAX setting to capture the AC voltage pulse to the passive antenna.

Disconnect the keyless entry antenna at the inoperative door or rear compartment.
With the DMM measure/capture for an AC voltage signal between the keyless entry antenna power circuit and the ground circuit.
With a scan tool, go to the RCDLR special functions menu.
Select and authenticate the affected antenna.

Was an AC voltage signal captured on the DMM?

Go to Step 7

Go to Step 6

Test the passive portion of the transmitter:

Turn on the J 43241 Keyless Entry Tester.
Place the transmitter on the J 43241 test pad.
With the J 43241 in hand, approach the vehicle and attempt to open each door and the rear compartment.

Does the J 43241 beep when attempting to open each door and the rear compartment?

Go to Step 8

Go to Step 9

Test the affected antenna's keyless entry antenna signal and low reference circuit for an open or a short to ground. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 14

Go to Step 8

Inspect for poor connections at the affected keyless entry antenna. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .

Did you find and correct the condition?

Go to Step 14

Go to Step 12

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

Did you find and correct the condition?

Go to Step 14

Go to Step 13

Replace the transmitter battery. Refer to Transmitter Battery Replacement .

Did you find and correct the condition?

Go to Step 14

Go to Step 10

Replace the keyless entry transmitter. Refer to Transmitter Programming .

Is the replacement complete?

Go to Step 11

Important: All transmitters which are to be recognized by the RCDLR must be programmed in a single programming sequence.

Perform the transmitter programming procedure. Refer to Transmitter Programming .

Does the DIC sound a chime and display the Programming Next Key Available to Begin information?

Go to Step 14

Go to Step 13

Replace the affected keyless entry antenna. Refer to Ignition Lock Key Transmitter Antenna Replacement - Floor Console , Ignition Lock Key Transmitter Antenna Replacement - Headliner and Ignition Lock Key Transmitter Antenna Replacement - Rear Compartment .

Is the replacement complete?

Go to Step 14

Replace the Remote Control Door Lock Receiver (RCDLR). Refer to Control Module References for replacement, setup, and programming.

Is the replacement complete?

Go to Step 14

Operate the system to verify the repair.

Is the failure removed?

System OK

Go to Step 3