DTC P0443[L3 Turbo]

id0102b7807600

DTC P0443

EVAP control system purge control valve circuit malfunction

DETECTION CONDITION

•  PCM monitors the input voltages from the purge solenoid valve. If the voltage remains low or high, the PCM determines that the purge solenoid valve circuit has a malfunction.

Diagnostic support note

•  This is an continuous monitor (CCM).

•  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 the first drive cycle.

•  FREEZE FRAME DATA is available.

•  DTCs are stored in the PCM memory.

POSSIBLE CAUSE

•  Purge solenoid valve malfunction

•  Connector or terminal malfunction

•  Short to ground in the wiring harness between purge solenoid valve terminal B and PCM terminal 2AB

•  Open circuit in the wiring harness between the main relay and purge solenoid valve terminal A

•  Open circuit in the wiring harness between purge solenoid valve terminal B and PCM terminal 2AB

•  Short to the power supply between purge solenoid valve terminal B and PCM terminal 2AB

•  PCM malfunction

DTC P0443	EVAP control system purge control valve circuit malfunction
DETECTION CONDITION	• PCM monitors the input voltages from the purge solenoid valve. If the voltage remains low or high, the PCM determines that the purge solenoid valve circuit has a malfunction. Diagnostic support note • This is an continuous monitor (CCM). • 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 the first drive cycle. • FREEZE FRAME DATA is available. • DTCs are stored in the PCM memory.
POSSIBLE CAUSE	• Purge solenoid valve malfunction • Connector or terminal malfunction • Short to ground in the wiring harness between purge solenoid valve terminal B and PCM terminal 2AB • Open circuit in the wiring harness between the main relay and purge solenoid valve terminal A • Open circuit in the wiring harness between purge solenoid valve terminal B and PCM terminal 2AB • Short to the power supply between purge solenoid valve terminal B and PCM terminal 2AB • PCM malfunction

Diagnostic procedure

STEP	INSPECTION		ACTION
1	VERIFY FREEZE FRAME DATA HAS BEEN RECORDED • Has the FREEZE FRAME DATA been recorded?	Yes	Go to the next step.
1		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 the repair or diagnosis according to the available Service Information. • If the vehicle is not repaired, go to the next step.
2		No	Go to the next step.
3	CLASSIFY OPEN CIRCUIT OR SHORT TO GROUND MALFUNCTION • Disconnect the purge solenoid valve tube that is connected to the intake manifold. • Connect the vacuum pump to the purge solenoid valve. • Pump the vacuum pump several times and stop. • Wait a few seconds. • Is the vacuum maintained?	Yes	Go to Step 5.
3		No	Go to the next step.
4	INSPECT PASSAGE CONTROL OF PURGE SOLENOID VALVE • Turn the ignition switch off. • Disconnect the purge solenoid valve connector. • Pump the vacuum pump several times and wait a few seconds. • Is the vacuum maintained?	Yes	Repair or replace the wiring harness for a short to ground, then go to Step 10.
4		No	Replace the purge solenoid valve, then go to Step 10.
5	INSPECT PURGE SOLENOID VALVE CONNECTOR FOR POOR CONNECTION • Turn the ignition switch off. • Inspect for poor connection (damaged/pulled-out pins, corrosion, etc.). • Is there any malfunction?	Yes	Repair or replace the terminal, then go to Step 10.
5		No	Go to the next step.
6	INSPECT PURGE SOLENOID VALVE • Perform the purge solenoid valve inspection. (See PURGE SOLENOID VALVE INSPECTION[L3 Turbo].) • Is the purge solenoid valve normal?	Yes	Go to the next step.
6		No	Replace the purge solenoid valve, then go to Step 10.
7	INSPECT PURGE SOLENOID VALVE POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT • Turn ignition switch to the ON position (Engine off). • Measure the voltage between purge solenoid valve connector terminal A and body ground. • Is the voltage B+?	Yes	Go to the next step.
7		No	Repair or replace the wiring harness for an open circuit, then go to Step 10.
8	INSPECT PCM CONNECTOR FOR POOR CONNECTION • Turn the ignition switch off. • Disconnect the PCM connector. • Inspect for poor connection (damaged/pulled-out pins, corrosion, etc.). • Is there any malfunction?	Yes	Repair or replace the terminal, then go to Step 10.
8		No	Go to the next step.
9	INSPECT PURGE SOLENOID VALVE CONTROL CIRCUIT • Turn ignition switch to the ON position (Engine off). • Measure voltage between purge solenoid valve terminal B (harness-side) and body ground. • Is the voltage B+?	Yes	Repair or replace the wiring harness for a short to power supply, then go to the next step.
9		No	Inspect for continuity between purge solenoid valve terminal B (harness-side) and PCM terminal 2AB (harness-side). • 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 COMPLETED • Make sure to reconnect all disconnected connectors. • Clear the DTC from the PCM memory using the M-MDS. • Turn the ignition switch off. • Start the engine and warm it up completely. • Is the PENDING CODE for this DTC present?	Yes	Replace PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION[L3 Turbo].)
10		No	Go to the next step.
11	VERIFY AFTER REPAIR PROCEDURE • Perform the “After Repair Procedure”. (See AFTER REPAIR PROCEDURE[L3 Turbo].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE[L3 Turbo].)
11		No	Troubleshooting completed.