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Home >> Cadillac >> 2003 >> Escalade EXT >> Repair and Diagnosis >> External Pages >> Different car >> Section 645 (Keyless Entry System) >> Diagnostic Information and Procedures >> Keyless Entry System Inoperative
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Keyless Entry System Inoperative

WARNING: This page is about a different car, the 2004 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.
Keyless Entry System Inoperative

Step Action Yes No
1 Did you perform the Diagnostic System Check? Go to Step 2  Go to Diagnostic System Check - Remote Keyless Entry 
2 Press each button of the transmitter one at a time.
Does the system operate normally?		 Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems Go to Step 3 
3 Lock and unlock the door locks using the controls inside the vehicle.
Do the locks operate properly?		 Go to Step 4  Go to Diagnostic System Check - Door Systems in Doors
4 Operate the rear compartment release from the controls inside the vehicle.
Does the rear compartment release operate properly?		 Go to Step 5  Go to Symptoms - Body Rear End in Body Rear End
5
IMPORTANT: Inspect 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 vehicle remote system.
  1. Turn on the J 43241  Keyless Entry Tester. See Special Tools and Equipment  .
  2. Place the transmitter on theJ 43241  test pad. See Special Tools and Equipment  .
  3. 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? See Special Tools and Equipment  .		 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  .
Did you complete the replacement?		 Go to Step 8  -
8
  1. Turn on the J 43241  Keyless Entry Tester. See Special Tools and Equipment  .
  2. Place the transmitter on the J 43241  test pad. See Special Tools and Equipment  .
  3. Press each button of the transmitter one at a time.
Does a tone sound and the green light illuminate on theJ 43241  after each button is pressed? See Special Tools and Equipment  .		 Go to Step 10  Go to Step 9 
9 Replace the transmitter.
Did you complete the replacement?		 Go to Step 10  -
10
IMPORTANT: All transmitters which are to be recognized by the Keyless Entry system must be programmed in a single programming sequence. If the system is placed in program mode it will erase all previously programmed transmitters upon the receipt of the programming signal from the first transmitter.
Perform the programming procedure. Refer to Transmitter Programming  .Did the locks cycle to lock then unlock?		 Go to Step 12  Go to Step 11 
11
IMPORTANT: When replacing the Radio Antenna Module, perform the transmitter programming procedure.
Replace the Radio Antenna Module. Refer to Antenna Module Replacement .Did you complete the replacement?		 Go to Step 12  -
12 Operate the system in order to verify the repair.
Did you correct the condition?		 System OK Go to Step 3 
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