GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 1998 🢒 DeVille 🢒 Body and Accessories 🢒 Keyless Entry 🢒 Diagnostic System Check - Remote Keyless Entry

Step

Action

Value(s)

Yes

No

1
  1. Install a Scan Tool .
  2. Turn the ignition switch on.
  3. Attempt to establish communications with the vehicle.

Does the Scan Tool communicate with the vehicle?

--

Go to Step 2

Go to Diagnostic System Check - Data Link Communications in Wiring Systems

2

Attempt to establish communications with the remote function actuator (RFA) module.

Does the Scan Tool communicate with the RFA module?

--

Go to Step 3

Go to Remote Keyless Entry System Check

3

Request the Scan Tool to display RFA DTCs.

Are any DTCs present?

--

Go to Diagnostic Trouble Code (DTC) List/Type

Go to Remote Keyless Entry System Check