DTC P0443:00 [MZI-3.7]

id0102d2704500

DTC P0443:00 | Purge solenoid valve circuit
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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 2H • 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 2H • Open circuit between purge solenoid valve terminal B and PCM terminal 2H • PCM malfunction

Diagnostic procedure

STEP | INSPECTION | ACTION
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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 • Purge solenoid valve connector is disconnected. • Turn the ignition switch to the ON position (Engine off). • Measure voltage between purge solenoid valve terminal A (wiring harness-side) 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 • Purge solenoid valve connector is disconnected. • Turn the ignition switch to the ON position (Engine off). • Measure the voltage between purge solenoid valve control terminal B (wiring harness-side) 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 • Purge solenoid valve connector is disconnected. • Turn the ignition switch off. • Inspect for continuity between purge solenoid valve control terminal B (wiring harness-side) 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 • Purge solenoid valve and PCM connectors are disconnected. • Turn the ignition switch off. • Inspect continuity between purge solenoid valve terminal B (wiring harness-side) and PCM terminal 2H (wiring harness-side). • 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. (See PURGE SOLENOID VALVE INSPECTION [MZI-3.7].) • Is there any malfunction? | Yes | Replace purge solenoid valve, then go to Step 10. (See PURGE SOLENOID VALVE REMOVAL/INSTALLATION [MZI-3.7].)
No | Go to the next step.
10 | VERIFY TROUBLESHOOTING OF DTC P0443:00 COMPLETED • Make sure to reconnect all disconnected connectors. • Clear DTC from PCM memory using M-MDS. • Perform the KOEO or KOER self-test. (See KOEO/KOER SELF TEST [MZI-3.7].) • Is the PENDING CODE same DTC present? | Yes | Repeat the inspection from Step 1. • If the malfunction recurs, replace the PCM. (See PCM REMOVAL/INSTALLATION [MZI-3.7].) Go to the next step.
No | Go to the next step.
11 | VERIFY AFTER REPAIR PROCEDURE • Perform the “AFTER REPAIR PROCEDURE”. (See AFTER REPAIR PROCEDURE [MZI-3.7].) • Are any DTCs present? | Yes | Go to the applicable DTC inspection. (See DTC TABLE [MZI-3.7].)
No | Troubleshooting completed.