Diagnostic System Check - Remote Keyless Entry. Cadillac Eldorado 2001

For 1990-2009 cars only

Makes 🢒 Cadillac 🢒 2001 🢒 Eldorado 🢒 Body and Accessories 🢒 Body Control System 🢒 Diagnostic System Check - Remote Keyless Entry

Test Description

The number(s) below refer to the step number(s) on the diagnostic table.

Lack of communication may be due to a malfunction of the class 2 serial data circuit. The specified procedure will determine the particular condition.

The symptom list in Symptoms will determine the correct diagnostic procedure to use.

The presence of DTCs which begin with "U" indicate some other module is not communicating. The specified procedure will compile all the available information before tests are performed.

Step

Action

Yes

Install a scan tool.

Does the scan tool power up?

Go to Step 2

Go to Scan Tool Does Not Power Up in Data Link Communications

Turn ON the ignition, with the engine OFF.
Attempt to establish communication with the following modules:

•	The remote function actuator (RFA) module (remote control door lock receiver)

•	The body control module (PZM)

Does the scan tool communicate with both of the modules?

Go to Step 3

Go to Scan Tool Does Not Communicate with Class 2 Device in Data Link Communications

Important: The engine may start during the following step. Turn OFF the engine as soon as you have observed the Crank power mode.

Access the Class 2 Power Mode in the Diagnostic Circuit Check on the scan tool.
Rotate the ignition switch through all positions while observing the ignition switch power mode parameter.

Does the ignition switch position for all switch positions?

Go to Step 4

Go to Power Mode Mismatch in Body Control Systems.

Select the display DTCs function on the scan tool for the following modules: