For a complete wiring diagram Refer to Section 8W.When Monitored:The ignition on or engine running. Battery voltage greater than 10 volts.Set Condition:The PCM will set a trouble code if the actual state of the solenoid does not match the intended state. One Trip Fault. Three good trips to turn off the MIL.Possible Causes(K52) EVAP PURGE CONTROL CIRCUIT SHORTED TO VOLTAGE(K70) EVAP PURGE RETURN CIRCUIT SHORTED TO VOLTAGE(K52) EVAP PURGE CONTROL CIRCUIT SHORTED TO GROUNDEXCESSIVE RESISTANCE IN THE (K52) EVAP PURGE CONTROL CIRCUITEXCESSIVE RESISTANCE IN THE (K70) EVAP PURGE RETURN CIRCUITEVAP PURGE SOLENOIDPCMAlways perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).1. VEHICLE HISTORY AND SERVICE BULLETIN INVESTIGATIONIgnition on, engine not running.With a scan tool, select View DTCs and record the related Freeze Frame data if any DTC(s) are present.Whether or not any DTC(s) are Active you will want to check the following items which may assist in repairing the customer's complaint successfully.Check the vehicle's repair history.If the vehicle has a repair history that pertains to the customer's current complaint, review the repair.Inspect the vehicle for any aftermarket accessories that may have been installed incorrectly.Check for any service bulletin(s) related to the customer's complaint or DTC(s).If a service bulletin applies, follow the instructions per the service bulletin.Choose the following scenario that best applies.The service bulletin repaired the customer's complaint.Testing complete.A DTC is present, no service bulletins apply, or the service bulletin didn't repair the customer's complaint.Go To 2 2. ACTIVE DTCIgnition on, engine not running.With the scan tool, Select View DTCs.Is the DTC Active at this time?YesGo To 3NoRefer to the INTERMITTENT CONDITION Diagnostic Procedure.Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)3. (K52) EVAP PURGE CONTROL CIRCUIT SHORTED TO VOLTAGE

Turn the ignition off.Disconnect the EVAP Purge Solenoid harness connector.Disconnect the C3 PCM harness connector.Ignition on, engine not running.Measure the voltage of the (K52) Evap Purge Control circuit in the Evap Purge Solenoid harness connector.Is there any voltage present?YesRepair the short to voltage in the (K52) Evap Purge Control circuit.Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)NoGo To 4 4. (K70) EVAP PURGE RETURN CIRCUIT SHORTED TO VOLTAGE

Measure the voltage of the (K70) Evap Purge Return circuit in the Evap Purge Solenoid harness connector.Is there any voltage present?YesRepair the short to voltage in the (K70) Evap Purge Return circuit.Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)NoGo to 55. (K52) EVAP PURGE CONTROL CIRCUIT SHORTED TO GROUND

Turn the ignition off.Measure the resistance between ground and the (K52) Evap Purge Control circuit in the Evap Purge Solenoid harness connector.Is the resistance below 100 ohms?YesRepair the (K52) Evap Purge Control circuit for a short to ground.Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)NoGo to 66. (K52) EVAP PURGE CONTROL CIRCUIT OPEN

Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install Miller Special Tool #8815 to perform diagnosis.Measure the resistance of the (K52) Evap Purge Control circuit from the Evap Purge Solenoid harness connector to the appropriate terminal of special tool #8815.Is the resistance below 5.0 ohms?YesGo To 7NoRepair the open in the (K52) EVAP Purge Control circuit.Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)7. (K70) EVAP PURGE RETURN CIRCUIT OPEN

Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install Miller Special Tool #8815 to perform diagnosis.Measure the resistance of the (K70) Evap Purge Return circuit from the EVAP Purge Solenoid harness connector to the appropriate terminal of special tool #8815.Is the resistance below 5.0 ohms?YesGo To 8NoRepair the open in the (K70) Evap Purge Return circuit.Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)8. EVAP PURGE SOLENOID

Connect the C3 PCM harness connector.Ignition on, engine not running.With the scan tool, actuate the Evap Purge Solenoid control to the ON (100%) position.The DTC needs to be cleared before actuating the Purge Solenoid, if the DTC is not cleared, the Solenoid may not be allowed to actuate.Using a 12-volt test light connected to ground, check the (K52) Evap Purge Control circuit in the Evap Purge Solenoid harness connector.The test light should be illuminated and bright. Compare the brightness to that of a direct connection to the B- (ground).Is the test light illuminated and bright?YesReplace the Evap Purge Solenoid in per Service Information.Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)NoGo to 99. PCMBefore continuing, check the PCM harness connector terminals for corrosion, damage, or terminal push out. Repair as necessary.Using the schematics as a guide, inspect the wire harness and connectors. Pay particular attention to all Power and Ground circuits.Were there any problems found?YesRepair as necessary.Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)NoReplace and program the Powertrain Control Module per Service Information.Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)