P0602

Diagnostic Chart:

CIRCUIT DESCRIPTION
If a control module is installed without being programmed, DTC P0602 will be set. During reprogramming and immediately after completion, DTC P0602 will also be set. This DTC should be successfully cleared after following the reprogramming procedures.

Since this diagnostic pertains to an internal VCM diagnostic check, no wiring schematic is required.

CONDITIONS FOR RUNNING THE DTC
The ignition switch is in the run position.

CONDITIONS FOR SETTING THE DTC
No software data is present in the VCM.

ACTION TAKEN WHEN THE DTC SETS
^ The control module illuminates the Malfunction Indicator Lamp (MIL) the first time the diagnostic runs and fails.
^ The control module will set the DTC and records the operating conditions at the time the diagnostic fails. The control module stores the failure information in the scan tools Freeze Frame/Failure Records.

CONDITIONS FOR CLEARING THE MIL OR DTC
^ The control module turns OFF the MIL after 3 consecutive drive trips when the test has run and passed.
^ A history DTC will clear if no fault conditions have been detected for 40 warm-up cycles. A warm-up cycle occurs when the coolant temperature has risen 22°C (40°F) from the startup coolant temperature and the engine coolant reaches a temperature that is more than 70°C (158°F) during the same ignition cycle.
^ Use a scan tool in order to clear the DTCs.

DIAGNOSTIC AIDS
Check for the intermittents.

An intermittent may be caused by any of the following conditions:
^ A poor connection
^ Rubbed through wire insulation
^ A broken wire inside the insulation

Thoroughly inspect any circuitry that is suspected of causing the intermittent complaint. Refer to Testing for Intermittent and Poor Connections in Diagrams.

If a repair is necessary, refer to Wiring Repairs or Connector Repairs in Diagrams.

TEST DESCRIPTION
The numbers below refer to the step numbers on the diagnostic table.
3. If the flashing procedure fails, verify that the equipment being used is functioning properly and that all cable connections are clean and tight. Also, make sure that the software you download is correct for the VCM being flashed. If everything checks out OK, and a second attempt fails, replace the VCM.