GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value

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 lid release from the control inside the vehicle.

Does the rear compartment lid release operate properly?

--

Go to Step 5

Go to Diagnostic System Check - 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.
  2. Place the transmitter on the J 43421 test pad.
  3. Press each button of the transmitter one at a time.

Does a tone sound and the green light illuminate on the J 43421 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 .

Did you complete the replacement?

--

Go to Step 8

--

8

  1. Turn on the J 43241 Keyless Entry Tester.
  2. Place the transmitter on the J43421 test pad.
  3. Press each button of the transmitter one at a time.

Does a tone sound and the green light illuminate on the J43421 after each button is pressed?

--

Go to Step 10

Go to Step 9

9

Replace the transmitter.

Did you complete the replacement?

--

Go to Step 13

--

10

Press the PANIC button on the transmitter.

Does the PANIC function operate normally?

--

Go to Step 11

Go to Step 13

11

Perform the synchronization procedure. Refer to Transmitter Synchronization .

Did the horn chirp three times to confirm that the synchronization has been completed?

--

Go to Step 12

Go to Step 13

12

Operate the transmitter within range of the vehicle.

Do all of the keyless entry functions operate normally?

--

Go to Step 26

Go to Step 13

13

Important: All transmitters which are to be recognized by the remote control door lock receiver 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 body control module (BCM) chime two times to confirm that the programming has been completed?

--

Go to Step 26

Go to Step 14

14

  1. Turn OFF the Ignition.
  2. Disconnect the remote control door lock receiver (RCDLR).
  3. Connect a test lamp between the battery positive voltage circuit of the RCDLR and a good ground.

Does the test lamp illuminate?

--

Go to Step 15

Go to Step 21

15

Connect a test lamp between the battery positive voltage circuit of the RCDLR and the RCDLR ground circuit.

Does the test lamp illuminate?

--

Go to Step 16

Go to Step 22

16

  1. Disconnect the test lamp.
  2. Turn ON the ignition, with the engine OFF.
  3. Measure the voltage between the keyless entry serial data circuit and the RCDLR ground circuit.

Does the voltage measure within the specified range?

B+

Go to Step 17

Go to Step 18

17

  1. Turn ON the ignition, with the engine OFF.
  2. Connect a test lamp between the keyless entry serial data circuit and the RCDLR ground circuit.

Does the test lamp illuminate?

--

Go to Step 23

Go to Step 19

18

Test the keyless entry serial data circuit for an open, high resistance, or short to ground. Refer to Circuit Testing and Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 26

Go to Step 20

19

Inspect for poor connections at the harness connector of the RCDLR. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 26

Go to Step 24

20

Inspect for poor connections at the harness connector of the body control module (BCM). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 26

Go to Step 25

21

Repair the open, high resistance , or short to ground in the battery positive voltage circuit of the RCDLR. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Step 26

--

22

Repair the open or high resistance in the RCDLR ground circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Step 26

--

23

Repair the short to voltage in the keyless entry serial data circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Step 26

--

24

Important: Perform the keyless entry transmitter programming procedure when replacing the RCDLR.

Replace the RCDLR. Refer to Remote Control Door Lock Receiver Replacement .

Did you complete the replacement?

--

Go to Step 26

--

25

Important: Perform the BCM programming procedure when replacing the BCM.

Replace the BCM. Refer to Body Control Module Replacement in Body Control System.

Did you complete the replacement?

--

Go to Step 26

--

26

Operate the system in order to verify the repair.

Did you correct the condition?

--

System OK

Go to Step 3