Test Description
The number(s) below refer to the step number(s) on the diagnostic table.
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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.
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Determine if any DTCs are present which may be the cause of the condition.
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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.
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Determine if a BCM internal memory malfunction exists.
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Determine if a charging system malfunction exists.
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 | ||||||||
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 | |||||||||
Select the display DTCs function for the following control modules:
Does the scan tool display any DTCs? | Go to Step 4 | Go to Symptoms - Seats | |||||||||
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 | |||||||||
Does the scan tool display DTC B0605? | Go to Diagnostic Trouble Code (DTC) List in Body Control System | Go to Step 6 | |||||||||
Does the scan tool display DTC P0562 or P0563? | Go to Diagnostic Trouble Code (DTC) List in Engine Electrical |
