P0443
P0443-EVAP PURGE SOLENOID CIRCUIT
For a complete wiring diagram Consult Diagrams/Electrical.
- 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.
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Initial Inspection and Diagnostic Overview.
Diagnostic Test
1. VEHICLE HISTORY AND SERVICE BULLETIN INVESTIGATION
Ignition 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 DTC
Ignition on, engine not running.
With the scan tool, Select View DTCs.
Is the DTC Active at this time?
Yes
- Go To 3
No
- Refer to the INTERMITTENT CONDITION Diagnostic Procedure. Intermittent Condition.
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?
Yes
- Repair the short to voltage in the (K52) Evap Purge Control circuit.
- Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test.
No
- Go 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?
Yes
- Repair the short to voltage in the (K70) Evap Purge Return circuit.
- Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test.
No
- Go To 5
5. (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?
Yes
- Repair the (K52) Evap Purge Control circuit for a short to ground.
- Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test.
No
- Go To 6
6. (K52) EVAP PURGE 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.
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?
Yes
- Go To 7
No
- Repair the open in the (K52) EVAP Purge Control circuit.
- Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test.
7. (K70) EVAP PURGE RETURN 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.
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?
Yes
- Go To 8
No
- Repair the open in the (K70) Evap Purge Return circuit.
- Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test.
8. EVAP PURGE SOLENOID
Connect the C3 PCM harness connector.
Ignition on, engine not running.
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.
With the scan tool, actuate the Evap Purge Solenoid control to the ON (100%) position.
Using a 12-volt test light connected to ground, probe the (K52) Evap Purge Control circuit in the Evap Purge Solenoid harness connector.
NOTE: The test light should be illuminated and bright proportional to the maximum duty cycle allowed by the scan tool. For example, if the scan tool allows 100% actuation, the brightness should be as bright as a direct connection to the battery. If the scan tool allows a maximum 25% actuation, the brightness should be 25% as bright as a direct connection to the battery.
Does the test light illuminate accordingly?
Yes
- Verify that there is good pin to terminal contact in the Solenoid and the Powertrain Control Module connectors. If OK, replace the EVAP Purge Solenoid.
- Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test.
No
- Go To 9
9. POWERTRAIN CONTROL MODULE (PCM)
Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Evap Purge Solenoid Assembly, ESIM Switch and the Powertrain Control Module (PCM).
Look for any chafed, pierced, pinched, or partially broken wires.
Look for broken, bent, pushed out or corroded terminals. Verify that there is good pin to terminal contact in the Switch, Solenoid, and the Powertrain Control Module connectors.
Search for any Technical Service Bulletins that may apply.
Were there any problems found?
Yes
- Repair as necessary.
- Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test.
No
- Replace and program the Powertrain Control Module.
- Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test.