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Test Description

WARNING: This page is about a different car, the 2004 Chevrolet Corvette. 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:  Determine if any Seat Control Module, Body Control Module, or Powertrain Control Module DTCs are present.
  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 - Steering Wheel and Column

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 following systems:
    • The seat control module
    • The body control module
    • The powertrain control module
Does the scan tool communicate with these systems?		 Go to Step 3  Go to Scan Tool Does Not Communicate with Class 2 Device in Data Link Communications
3 
  1. Select the seat control module display DTCs function on the scan tool.
  2. Select the body control module display DTCs function on the scan tool.
  3. Select the powertrain control module display DTCs function on the scan tool.
Does the scan tool display any DTCs?		 Go to Step 4  Go to Symptoms - Steering Wheel and Column 
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 B0605? Go to DTC B0605 in Body Control Systems Go to Step 6 
6 Does the scan tool display DTC P0562 or P0563? Go to Diagnostic System Check - Automatic Transmission in Automatic Transmission Go to Diagnostic Trouble Code (DTC) List 
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