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HOMESERVICE MANUALSCHEVROLET2001CAVALIER LS, 2.4 TREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 227 (SHIFT INTERLOCK SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESDIAGNOSTIC SYSTEM CHECK - AUTOMATIC TRANSMISSION SHIFT LOCK CONTROLTEST DESCRIPTION
2001 Chevrolet Cavalier LS, 2.4 T

Test Description

2001 Chevrolet Cavalier LS, 2.4 TSECTION Test Description
WARNING: This page is about a different car, the 2004 Pontiac Sunfire and 2004 Chevrolet Cavalier. However, it is still accessible from the selected car via links, so may be relevant.

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

  1. 2:  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. 3:  If no DTCs are present, refer to the symptom list of further diagnostics.
  3. 4:  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.
Diagnostic System Check - Automatic Transmission Shift Lock Control

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 communication with the Body Control Module (BCM) and the Powertrain Control Module (PCM).
Does the scan tool communicate with the Body Control Module (BCM) and the Powertrain Control Module (PCM)?		 Go to Step 3  Go to Scan Tool Does Not Communicate with Class 2 Device in Data Link Communications
3  With a scan tools re
 
Retrieve all DTC's from the following Modules.
  1. Body Control Module (BCM)
  2. Powertrain Control Module (PCM)

Does the scan tool display any DTCs?		 Go to Step 4  Go to Symptoms - Automatic Transmission Shift Lock Control 
4  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 5 
5 Does the scan tool display DTC B1000 or B1001? Go to Scan Tool Data List in Body Control System Go to Step 6 
6 Does the scan tool display DTC B1328? Go to Diagnostic Trouble Code (DTC) List in Engine Electrical Go to Diagnostic Trouble Code (DTC) List  DTC List
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.