GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2004 🢒 CTS 🢒 Accessories 🢒 Keyless Entry 🢒 Diagnostic System Check - Tire Pressure Monitoring

Test Description

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

  1. The lack of communication may be caused by a partial or a total malfunction of the circuit containing the serial data. The specified procedure will determine the particular condition.

    2.

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

    3.

  3. Tests for the presents of any Radio/Audio System DTCs. The Tire Pressure Monitor (TPM) System uses the RFA antenna grid in the vehicles rear window to receive tire pressure sensor transmission. This antenna grid shares its connector with the AM/FM antenna grid.

    4.

  4. Tests for the presence of any Keyless Entry System DTCs. the antenna module also controls the Keyless Entry System.

    5.

  5. Tests if the malfunction is within the TPM System.

Step

Action

Yes

No

Schematic Reference: Tire Pressure Monitoring System Schematics

1

Install a scan tool.

Does the scan tool turn ON?

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 antenna module.

Does the scan tool communicate with the antenna module?

Go to Step 3

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

3

Select the diagnostic trouble codes (DTC) function on the scan tool referring to the antenna module.

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

Go to Diagnostic Trouble Code (DTC) List in Data Link Communications

Go to Step 4

4

Does the scan tool display any Radio/Audio System DTCs?

Go to Diagnostic System Check - Radio/Audio System in Entertainment

Go to Step 5

5

Does the scan tool display any Keyless Entry System DTCs?

Go to Diagnostic System Check - Remote Keyless Entry in Keyless Entry

Go to Step 6

6

Does the scan tool display any TPM DTCs?

Go to Diagnostic Trouble Code (DTC) List

Go to Symptoms - Tire Pressure Monitoring