Engine

P0602 - Control Module Programming Error/Not Programmed






For wiring diagrams, refer to.

• When Monitored: With the engine running.

• Set Condition: The PCM detects an internal error.






• Always perform the pre-diagnostic troubleshooting procedure before proceeding. Refer to => Non-DTC Based Diagnostics. Pre-Diagnostic Troubleshooting Procedure

Test Step 1 - DTC is Active

• Diagnose and repair any other DTCs set in the PCM before proceeding with this test.

• Before proceeding, verify that the PCM software is up to date. If necessary, update the PCM software and retest. Refer to any TSBs that apply.

• Turn the ignition ON.

• With the scan tool, Clear DTCs in the PCM.

• Start the engine and allow it to reach operating temperature.


When the engine is operating, do not stand in direct line with the fan. Do not put your hands near the pulleys, belts, or fan. Do not wear loose clothing. Failure to follow these instructions can result in personal injury or death.

• With the scan tool, select view DTCs.

Is the status active for this DTC?

Yes

• Go to Test Step 2 => [ Test
Step 2 - Checking the PCM Power and Ground Circuits ]

No

• Refer to the checking for an intermittent DTC diagnostic procedure. Refer to => Non-DTC Based Diagnostics. Checking for an Intermittent DTC

Test Step 2 - Checking the PCM Power and Ground Circuits

• Perform the diagnostic procedure for Checking the PCM Power and Ground Circuits. Refer to => Non-DTC Based Diagnostics. PCM Power and Ground Circuit Test PCM Power and Ground Circuit Test

Were any problems found?

Yes

• Repair the PCM power and ground circuits as necessary.

• Perform the PCM Verification Test. Refer to => Non-DTC
Based Diagnostics. PCM Verification Test

No

• Go to Test Step 3 => [ Test
Step 3 - PCM ]

Test Step 3 - PCM

• Using the wiring diagram/schematic as a guide, inspect the wiring and connectors at the PCM.

• Look for any chafed, pierced, pinched, or partially broken wires.

• Look for broken, bent, pushed out or corroded terminals.

• Refer to any technical service bulletins that may apply.

Were any problems found?

Yes

• Repair as necessary.

• Perform the PCM Verification Test. Refer to => Non-DTC
Based Diagnostics. PCM Verification Test

No

• Replace and program the PCM.

• Perform the PCM Verification Test. Refer to => Non-DTC
Based Diagnostics. PCM Verification Test