Test Step 3 - Verify the PCM is Active on the Bus

• Turn the ignition ON.
• With the scan tool, select network diagnostics.
• Verify the PCM is active on the bus.

Is the PCM active on the bus?

Yes 

• Go to Test Step 4 Test Step 4 - Test for Additional Communication Related DTCs .

No 

• Perform the No Response diagnostic procedure. Refer to NO RESPONSE FROM POWERTRAIN CONTROL MODULE .