DTC P0443 [MZI-3.7]

id0102d2807600

DTC P0443

Purge solenoid valve circuit
DETECTION CONDITION
•  The PCM monitors the state of the purge solenoid valve circuit output driver. The test fails when the signal moves outside the minimum or maximum limit for the commanded state.
POSSIBLE CAUSE
•  Purge solenoid valve malfunction
•  Connector or terminal malfunction
•  Short to ground between purge solenoid valve terminal B and PCM terminal 1BC
•  Open circuit between main relay No.1 terminal D and purge solenoid valve terminal A
•  Short to power supply between purge solenoid valve terminal B and PCM terminal 1BC
•  Open circuit between purge solenoid valve terminal B and PCM terminal 1BC
•  PCM malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION
1
VERIFY FREEZE FRAME DATA HAS BEEN RECORDED
•  Has FREEZE FRAME DATA been recorded?
Yes
Go to the next step.
No
Record FREEZE FRAME DATA on the repair order, then go to the next step.
2
VERIFY RELATED SERVICE INFORMATION AVAILABILITY
•  Verify related Service Information availability.
•  Is any related Service Information available?
Yes
Perform repair or diagnosis according to the available Service Information.
•  If the vehicle is not repaired, go to the next step.
No
Go to the next step.
3
INSPECT PURGE SOLENOID VALVE CONNECTOR FOR POOR CONNECTION
•  Turn the ignition switch off.
•  Disconnect purge solenoid valve connector.
•  Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
•  Are there any malfunction?
Yes
Repair or replace suspected part, then go to Step 10.
No
Go to the next step.
4
INSPECT POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT
•  Turn the ignition switch to the ON position (Engine off).
•  Measure voltage between purge solenoid valve terminal A and body ground.
•  Is voltage B+?
Yes
Go to the next step.
No
Repair or replace suspected part, then go to Step 10.
5
INSPECT PURGE SOLENOID VALVE CONTROL CIRCUIT FOR SHORT TO POWER SUPPLY
•  Turn the ignition switch to the ON position (Engine off).
•  Measure the voltage between purge solenoid valve control terminal B and body ground.
•  Is voltage B+?
Yes
Repair or replace suspected part, then go to Step 10.
No
Go to the next step.
6
INSPECT PURGE SOLENOID VALVE CONTROL CIRCUIT FOR SHORT TO GROUND
•  Turn the ignition switch off.
•  Inspect for continuity between purge solenoid valve control terminal B and body ground.
•  Is there continuity?
Yes
Repair or replace suspected part, then go to the Step 10.
No
Go to the next step.
7
INSPECT PCM CONNECTOR FOR POOR CONNECTION
•  Turn the ignition switch off.
•  Disconnect PCM connector.
•  Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
•  Is there any malfunction?
Yes
Repair or replace suspected part, then go to Step 10.
No
Go to the next step.
8
INSPECT PURGE SOLENOID VALVE CONTROL CIRCUIT FOR OPEN CIRCUIT
•  Turn the ignition switch off.
•  Inspect continuity between purge solenoid valve terminal B and PCM terminal 1BC.
•  Is there continuity?
Yes
Go to the next step.
No
Repair or replace suspected part, then go to the Step 10.
9
INSPECT PURGE SOLENOID VALVE
•  Inspect the purge solenoid valve.
•  Is there any malfunction?
Yes
Replace purge solenoid valve (See PURGE SOLENOID VALVE REMOVAL/INSTALLATION [MZI-3.7].), then go to Step 10.
No
Go to the next step.
10
VERIFY TROUBLESHOOTING OF DTC P0443 COMPLETED
•  Make sure to reconnect all disconnected connectors.
•  Clear DTC from PCM memory using M‐MDS.
•  Perform the “KOEO or KOER self-test” using the M‐MDS.
•  Is the PENDING CODE same DTC present?
Yes
Replace PCM, then go to the next step.
(See PCM REMOVAL/INSTALLATION [MZI-3.7].)
No
Go to the next step.
11
VERIFY AFTER REPAIR PROCEDURE
•  Perform the “AFTER REPAIR PROCEDURE”.
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [MZI-3.7].)
No
Troubleshooting completed.