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Test Description

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The numbers below refer to the step number(s) 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:  The symptoms list in Symptoms will determine the correct diagnostic procedure to use.
  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.
  4. 5:  The presence of DTC P0601, P0602, P0604, P0606 or P1683 indicates an internal fault in the PCM.
  5. 6:  The presence of DTC B1000, B1004, B1007, or B1009 indicates an internal module fault.
  6. 7:  The presence of DTC P0562 or P0563 indicates a low or high battery voltage condition.
Diagnostic System Check - Theft Deterrent

Step Action Yes No
Schematic Reference: Theft Deterrent System Schematics 
1 Install a scan tool.
Does the scan tool power up?		 Go to Step 2  Go to SCAN TOOL DOES NOT POWER UP
2 
  1. Turn ON the ignition, with the engine OFF.
  2. Attempt to establish communication with the following modules:
    • Powertrain Control Module (PCM)
    • Theft Deterrent Control Module
    • Instrument Panel Cluster (IPC)
Does the scan tool communicate with all of the listed control modules?		 Go to Step 3  Go to SCAN TOOL DOES NOT COMMUNICATE WITH CLASS 2 DEVICE
3  Select the display DTC function on the scan tool for the following modules:
  • Powertrain Control Module (PCM)
  • Theft Deterrent Control Module
  • Instrument Panel Cluster (IPC)

Does the scan tool display any DTCs?		 Go to Step 4  Go to Symptoms - Theft Deterrent 
4  Does the scan tool display any DTCs which begin with a "U"? Go to SCAN TOOL DOES NOT COMMUNICATE WITH CLASS 2 DEVICE Go to Step 5 
5  Does the scan tool display DTC P0601, P0602, P0603, P0604, P0606 or P1683? Go to DIAGNOSTIC TROUBLE CODE DEFINITIONS or DIAGNOSTIC TROUBLE CODE DEFINITIONS Go to Step 6 
6  Does the scan tool display DTC B1000, B1004, B1007 or B1009? Go to DIAGNOSTIC TROUBLE CODE (DTC) LIST Go to Step 7 
7  Does the scan tool display DTC P0562 or P0563? Go to DIAGNOSTIC TROUBLE CODE DEFINITIONS Go to Diagnostic Trouble Code (DTC) List 
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