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For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 2000 🢒 Grand Prix 🢒 Engine 🢒 Engine Controls - 3.8L 🢒 Diagnostic System Check

Diagnostic System Check for Pontiac Grand Prix 2000

Test Description

The number(s) below refer to the step number(s) 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 Powertrain Control Module will display DTCs if the A/C compressor reacts improperly to the request for cooling air.

Step

Action

Yes

No

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 communications with the powertrain control module (PCM).

Does the scan tool communicate with the PCM?

Go to Step 3

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

3

Select the PCM display DTCs function on the scan tool.

Does the scan tool display any DTCs?

Go to Step 4

Go to Symptoms

4

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

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

Go to Step 5

5

Does the scan tool display DTC P0530 or P1546?

Go to Diagnostic Trouble Code (DTC) List/Type (LG8) or Diagnostic Trouble Code (DTC) List/Type (L36 and L67) in Engine Controls

Go to Symptoms