DTC P0443 [L8, LF]

id0102b1807600

DTC P0443 | Purge solenoid valve circuit problem
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DETECTION CONDITION | • The PCM monitors the purge solenoid valve control signal voltage and current. If the following conditions are met, the PCM determines that there is a purge solenoid valve control circuit problem. ― The PCM turns the purge solenoid valve off, but the voltage of the purge solenoid valve control signal remains low. ― The PCM turns the purge solenoid valve on, but the current of the purge solenoid valve control signal remains high. Diagnostic support note • This is a continuous monitor (CCM). • The MIL illuminates if the PCM detects the above malfunction condition in two consecutive drive cycles or in one drive cycle while the DTC for the same malfunction has been stored in the PCM. • PENDING CODE is available if the PCM detects the above malfunction condition during first drive cycle. • FREEZE FRAME DATA (Mode 2/Mode 12) is available. • The DTC is stored in the PCM memory.
POSSIBLE CAUSE | • Purge solenoid valve connector or terminals malfunction • Open circuit or short to ground in wiring harness between main relay and purge solenoid valve terminal B ― Short to ground in wiring harness between main relay and purge solenoid valve terminal B ― EGI COMP1 10 A fuse malfunction ― Open circuit in wiring harness between main relay and purge solenoid valve terminal B • Purge solenoid valve malfunction • PCM connector or terminals malfunction • Short to ground in wiring harness between purge solenoid valve terminal A and PCM terminal 2C • Short to power supply in wiring harness between purge solenoid valve terminal A and PCM terminal 2C • Open circuit in wiring harness between purge solenoid valve terminal A and PCM terminal 2C • PCM malfunction

Diagnostic procedure

STEP | INSPECTION | ACTION
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1 | VERIFY FREEZE FRAME DATA (MODE 12) HAS BEEN RECORDED • Has the FREEZE FRAME DATA (Mode 12) been recorded? | Yes | Go to the next step.
No | Record the FREEZE FRAME DATA (Mode 12) 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 AND TERMINALS • Turn the ignition switch off. • Disconnect the purge solenoid valve connector. • Inspect for poor connection (such as damaged/pulled-out pins, corrosion). • Is there any malfunction? | Yes | Repair or replace the connector or terminals, then go to Step 10.
No | Go to the next step.
4 | INSPECT PURGE SOLENOID VALVE POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT OR SHORT TO GROUND • Purge solenoid valve connector is disconnected. • Turn the ignition switch to the ON position (engine off). • Measure the voltage between purge solenoid valve terminal B (wiring harness-side) and body ground. • Is the voltage B+? | Yes | Go to the next step.
No | Inspect the EGI COMP1 10 A fuse. If the fuse is melt: • Repair or replace the wiring harness for a possible short to ground, then replace the fuse. If the fuse is deterioration: • Replace the fuse. If the fuse is normal: • Repair or replace the wiring harness for a possible open circuit. Go to Step 10.
5 | INSPECT PURGE SOLENOID VALVE • Turn the ignition switch off. • Inspect the purge solenoid valve. (See PURGE SOLENOID VALVE INSPECTION [L8, LF].) • Is there any malfunction? | Yes | Replace the purge solenoid valve, then go to Step 10. (See PURGE SOLENOID VALVE REMOVAL/INSTALLATION [L8, LF].)
No | Go to the next step.
6 | INSPECT PCM CONNECTOR AND TERMINALS • Disconnect the PCM connector. • Inspect for poor connection (such as damaged/pulled-out pins, corrosion). • Is there any malfunction? | Yes | Repair or replace the connector or terminals, then go to Step 10.
No | Go to the next step.
7 | INSPECT PURGE SOLENOID VALVE CONTROL CIRCUIT FOR SHORT TO GROUND • Purge solenoid valve and PCM connectors are disconnected. • Inspect for continuity between purge solenoid valve terminal A (wiring harness-side) and body ground. • Is there continuity? | Yes | Repair or replace the wiring harness for a possible short to ground, then go to Step 10.
No | Go to the next step.
8 | INSPECT PURGE SOLENOID VALVE CONTROL CIRCUIT FOR SHORT TO POWER SUPPLY • Purge solenoid valve and PCM connectors are disconnected. • Turn the ignition switch to the ON position (engine off). • Measure the voltage between purge solenoid valve terminal A (wiring harness-side) and body ground. • Is there any voltage? | Yes | Repair or replace the wiring harness for a possible short to power supply, then go to Step 10.
No | Go to the next step.
9 | INSPECT PURGE SOLENOID VALVE CONTROL CIRCUIT FOR OPEN CIRCUIT • Purge solenoid valve and PCM connectors are disconnected. • Turn the ignition switch off. • Inspect for continuity between purge solenoid valve terminal A (wiring harness-side) and PCM terminal 2C (wiring harness-side). • Is there continuity? | Yes | Go to the next step.
No | Repair or replace the wiring harness for a possible open circuit, then go to the next step.
10 | VERIFY DTC TROUBLESHOOTING COMPLETED • Make sure to reconnect all disconnected connectors. • Clear the DTC from the PCM memory using the M-MDS. (See AFTER REPAIR PROCEDURE [L8, LF].) • Start the engine and warm it up completely. • Perform the KOEO/KOER self test. (See KOEO/KOER SELF TEST [L8, LF].) • Is the PENDING CODE for this DTC present? | Yes | Replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION [L8, LF].)
No | Go to the next step.
11 | VERIFY AFTER REPAIR PROCEDURE • Perform the “AFTER REPAIR PROCEDURE”. (See AFTER REPAIR PROCEDURE [L8, LF].) • Are any DTCs present? | Yes | Go to the applicable DTC troubleshooting. (See DTC TABLE [L8, LF].)
No | DTC troubleshooting completed.