DTC P0602 Control Module Not Programmed. Cadillac Catera 1998

For 1990-2009 cars only

Makes 🢒 Cadillac 🢒 1998 🢒 Catera 🢒 DTC 🢒 DTC P0602 Control Module Not Programmed

Circuit Description

This DTC indicates that the ECM's internal EEPROM has not been programmed with any vehicle software, or an error occurred during the programming.

Conditions for Running the DTC

Engine cranking

Conditions for Setting the DTC

The EEPROM has not been flashed with any vehicle software, or an error occurred during the programming.

Action Taken When the DTC Sets

The ECM illuminates the malfunction indicator lamp (MIL) and records the operating conditions in the Freeze Frame on the second consecutive drive trip that the diagnostic runs and fails.

Conditions for Clearing the MIL/DTC

•	The ECM turns OFF the MIL after three consecutive drive trips that the diagnostic runs and passes.

•	A History DTC clears after forty consecutive warm-up cycles in which no failures are reported by this diagnostic or any other emission related diagnostic.

•	The ECM battery voltage is interrupted.

•	The scan tool clears the MIL/DTC.

Test Description

The number(s) below refer to the step number(s) on the Diagnostic Table.

If the flashing routine fails, verify that the equipment used is functioning properly and that all of the cable connections are clean and tight. Also, make sure that the software you are attempting to download is correct for the ECM being flashed. If everything checks out OK, and a second attempt fails, the ECM is malfunctioning.

DTC P0602 - ECM Not Programmed

Step	Action	Value(s)	Yes	No
1	Did you perform the Powertrain On-Board Diagnostic (OBD) System check?	--	Go to Step 2	Go to Powertrain On Board Diagnostic (OBD) System Check
2	Important: This vehicle is equipped with a Theft Deterrent System which interfaces with the Engine Control Module (ECM). The new ECM must also be programmed with the frequency code of the theft deterrent module that is currently on the vehicle. Reprogram the ECM withthe correct theft deterrent frequency code. Refer to EEPROM Programming . Does DTC P0602 reset?	--	Go to Step 3	Go to Step 5
3	Verify that the equipment being used is functioning properly and that all of the cable connections are clean and tight. Attempt to reprogram the ECM again with the correct theft deterrent frequency code. Does DTC P0602 reset?	--	Go to Step 4	Go to Step 5
4	Replace the ECM. Refer to Engine Control Module Replacement/Programming . Is the action complete?	--	Go to Step 2	--
5	Clear the DTCs with the scan tool. Turn off the ignition for 15 seconds. Operate the vehicle within the conditions that are required for this diagnostic to run. Refer to Conditions for Running the DTC. Check for any DTCs. Is this DTC set?	--	Go to Step 2	Go to Step 6
6	Were there any additional DTCs noted during the Powertrain OBD System Check that have not been diagnosed?	--	Go to the applicable DTC table	The System is OK