DTC P0443:00 [L8, LF, L5]

id010242704500

DTC P0443:00

Purge solenoid valve circuit problem
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 the 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.
•  FREEZE FRAME DATA is available.
•  The DTC is stored in the PCM memory.
POSSIBLE CAUSE
•  Purge solenoid valve malfunction
•  Connector or terminal malfunction
•  Short to ground in wiring harness between purge solenoid valve terminal A and PCM terminal 2C
•  Open circuit in wiring harness between main relay and purge solenoid valve terminal B
•  Open circuit 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
•  PCM malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION
1
VERIFY FREEZE FRAME DATA AND DIAGNOSTIC MONITORING TEST RESULTS HAS BEEN RECORDED
•  Has FREEZE FRAME DATA been recorded?
Yes
Go to the next step.
No
Record the FREEZE FRAME 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
CLASSIFY OPEN CIRCUIT OR SHORT TO GROUND MALFUNCTION
•  Disconnect purge solenoid valve tube that is connected to intake manifold.
•  Connect vacuum pump to purge solenoid valve.
•  Pump vacuum pump several times and stop.
•  Wait a few seconds.
•  Is vacuum maintained?
Yes
Go to Step 5.
No
Go to the next step.
4
INSPECT PASSAGE CONTROL OF PURGE SOLENOID VALVE
•  Switch the ignition to off.
•  Disconnect purge solenoid valve connector.
•  Pump vacuum pump several times and wait a few seconds.
•  Is vacuum maintained?
Yes
Repair or replace wiring harness for short to ground, then go to Step 10.
No
Replace the purge solenoid valve, then go to Step 10.
5
INSPECT POOR CONNECTION OF PURGE SOLENOID VALVE CONNECTOR
•  Switch the ignition to 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 terminal and/or connector, then go to Step 10.
No
Go to the next step.
6
INSPECT PURGE SOLENOID VALVE
•  Inspect the purge solenoid valve inspection.
•  Is purge solenoid valve normal?
Yes
Go to the next step.
No
Replace the purge solenoid valve, then go to Step 10.
(See PURGE SOLENOID VALVE REMOVAL/INSTALLATION [L8, LF, L5].)
7
INSPECT PURGE SOLENOID VALVE POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT
•  Switch the ignition to ON (Engine off).
•  Measure the voltage between purge solenoid valve terminal B and body ground.
•  Is the voltage B+?
Yes
Go to the next step.
No
Repair or replace the wiring harness for an open circuit, then go to Step 10.
8
INSPECT POOR CONNECTION OF PCM CONNECTOR
•  Switch the ignition to off.
•  Disconnect the PCM connector.
•  Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
•  Is there any malfunction?
Yes
Repair or replace the terminal and/or connector, then go to Step 10.
No
Go to the next step.
9
INSPECT PURGE SOLENOID VALVE CONTROL CIRCUIT
•  Switch the ignition to ON (Engine off).
•  Measure the voltage between purge solenoid valve terminal A (wiring harness-side) and body ground.
•  Is the voltage B+?
Yes
Repair or replace the wiring harness for short to power supply, then go to the next step.
No
Inspect the harness at between purge solenoid valve terminal A (wiring harness-side) and PCM terminal 2C (wiring harness-side) for open or short circuit.
•  If there is continuity, go to the next step.
•  If there is no continuity, repair or replace the wiring harness for an open circuit, then go to the next step.
10
VERIFY TROUBLESHOOTING OF DTC P0443:00 COMPLETED
•  Make sure to reconnect all disconnected connectors.
•  Start the engine.
•  Is the PENDING CODE for this DTC present?
Yes
Replace the PCM, then go to the next step.
(See PCM REMOVAL/INSTALLATION [L8, LF, L5].)
No
Go to the next step.
11
VERIFY AFTER REPAIR PROCEDURE
•  Perform the “AFTER REPAIR PROCEDURE”.
•  Are any DTC present?
Yes
Go to the applicable DTC troubleshooting.
(See DTC TABLE [L8, LF, L5].)
No
Troubleshooting completed.