P0443-EVAP PURGE SOLENOID CIRCUIT

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 SOLENOID SIGNAL CIRCUIT SHORTED TO VOLTAGE

(K52) EVAP PURGE SOLENOID CONTROL CIRCUIT SHORTED TO GROUND

EXCESSIVE RESISTANCE IN THE (K52) EVAP PURGE CONTROL CIRCUIT

EXCESSIVE RESISTANCE IN THE (K70) EVAP PURGE SOLENOID SIGNAL CIRCUIT

EVAP PURGE SOLENOID

PCM

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).

Diagnostic Test

1.VEHICLE HISTORY AND SERVICE BULLETIN INVESTIGATION

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 DTC

Is the DTC Active at this time?

Yes

Go To 3

Refer 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

Is there any voltage present?

Yes

Repair the short to voltage in the (K52) Evap Purge Control circuit.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)

Go To 4

4.(K70) EVAP PURGE RETURN CIRCUIT SHORTED TO VOLTAGE

Is there any voltage present?

Yes

Repair the short to voltage in the (K70) Evap Purge Return circuit.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)

Go to 5

5.(K52) EVAP PURGE CONTROL CIRCUIT SHORTED TO GROUND

Is the resistance below 100 ohms?

Yes

Repair the (K52) Evap Purge Control circuit for a short to ground.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)

Go to 6

6.(K52) EVAP PURGE SOLENOID CONTROL CIRCUIT OPEN

CAUTION: 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.

Is the resistance below 5.0 ohms?

Yes

Go To 7

Repair the open in the (K52) EVAP Purge Solenoid Control circuit.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)

7.(K70) EVAP PURGE SOLENOID SIGNAL CIRCUIT OPEN

Is the resistance below 5.0 ohms?

Yes

Go To 8

Repair the open in the (K70) Evap Purge Solenoid Signal circuit.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)

8.EVAP PURGE SOLENOID

NOTE: 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.

NOTE: 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?

Yes

Replace the Evap Purge Solenoid in per Service Information.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)

Go to 9

9.PCM

NOTE: Before continuing, check the PCM harness connector terminals for corrosion, damage, or terminal push out. Repair as necessary.

Were there any problems found?

Yes

Repair as necessary.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)

Replace and program the Powertrain Control Module per Service Information.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)