GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2001 🢒 Park Avenue 🢒 Body and Accessories 🢒 Body Control System 🢒 Diagnostic System Check - Remote Keyless Entry

Test Description

The numbers below refer to the step numbers on the diagnostic table.

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

    2.

  2. The presence of DTCs U1161, U1162, or U1170 indicate that one or more of the door modules is not communicating.

    3.

  3. 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.

    4.

  4. At this point you have examined all DTCs which could affect the keyless entry system. Refer to Symptoms - Keyless Entry for further keyless entry diagnosis. Any other codes displayed from the listed modules do not apply to the keyless entry system and should be diagnosed in the applicable section.

Step

Action

Yes

No

Schematic Reference: Keyless Entry Schematics

1

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

2

  1. Turn ON the ignition, with the engine OFF.
  2. Attempt to establish communication with the following modules:
    3. • The Body Control Module (BCM)
    • The Driver Door Module (DDM)
    • The Remote Control Door Lock Receiver module (RCDLR)

Does the scan tool communicate with all of the modules?

Go to Step 3

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

3

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

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

Does the ignition switch parameter reading match the ignition switch position for all switch positions?

Go to Step 4

Go to Power Mode Mismatch in Body Control System

4

Select the BCM and then DDM display DTCs function on the scan tool.

Does the scan tool display any DTCs?

Go to Step 5

Go to Symptoms - Keyless Entry

5

Does the scan tool display DTCs U1161, U1162, or U1170?

Go to Diagnostic Trouble Code (DTC) List in Doors

Go to Step 6

6

Does the scan tool display any DTCs which begin with a "U"?

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

Go to Step 7

7

Does the scan tool display DTC B1000, B1652, B1656, or B1658?

Go to Diagnostic Trouble Code (DTC) List in Body Control System

Go to Step 8

8

Does the scan tool display DTC B1982 or B1983?

Go to Diagnostic Trouble Code (DTC) List in Engine Electrical

Go to Symptoms - Keyless Entry