Diagnostic procedure

DTC P0443 - DIAGNOSTIC PROCEDURE

STEP	INSPECTION		ACTION
1	VERIFY RELATED REPAIR INFORMATION AVAILABILITY Check for related Service Bulletins availability. Is any related repair information available?	Yes	Perform repair or diagnosis according to the available repair information. If the vehicle is not repaired, go to the next step.
1		No	Go to the next step.
2	CLASSIFY INTERMITTENT CONCERN OR CONTINUOUS CONCERN Turn key to OFF then start engine. Is same DTC present?	Yes	Go to the next step.
2		No	Refer to intermittent concern. (See INTERMITTENT CONCERN TROUBLESHOOTING .)
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.
3		No	Go to the next step.
4	INSPECT PASSAGE CONTROL OF PURGE SOLENOID VALVE Turn the ignition switch off. Disconnect purge solenoid valve connector. Pump vacuum pump several times and wait a few seconds. Is vacuum maintained?	Yes	Repair or replace harness for short to ground, then go to Step 10.
4		No	Replace purge solenoid valve, then go to Step 10.
5	INSPECT PURGE SOLENOID VALVE CONNECTOR FOR POOR CONNECTION Turn the ignition switch off. Check for poor connection (damaged/pulled-out pins, corrosion, etc.). Is there malfunction?	Yes	Repair or replace the terminal, then go to Step 10.
5		No	Go to the next step.
6	INSPECT PURGE SOLENOID VALVE Measure resistance between purge solenoid valve terminals (part-side). Is resistance within 22-26 ohms?	Yes No	Go to the next step.
6		No	Replace purge solenoid valve, then go to Step 10.
7	INSPECT PURGE SOLENOID VALVE POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT Turn key to ON (Engine off). Measure voltage between purge solenoid valve connector terminal A and body ground. Is voltage B+?	Yes No	Go to the next step.
7		No	Repair or replace harness for open, then go to Step 10.
8	INSPECT PCM CONNECTOR FOR POOR CONNECTION Turn the ignition switch off. Disconnect PCM connector. Check for poor connection (damaged/pulled-out pins, corrosion, etc.). Is there 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 Connect breakout box with PCM disconnected. Turn key to ON (Engine off). Measure voltage between purge solenoid valve terminal B (harness-side) and body ground. Is voltage B+?	Yes	Repair or replace harness for short to power, then go to the next step.
9		No	Check for continuity between purge solenoid valve terminal B (harness-side) and breakout box terminal 85. If there is continuity, go to the next step. If there is no continuity, repair or replace harness for open, then go to the next step.
10	VERIFY TROUBLESHOOTING OF DTC P0443 COMPLETED Make sure to reconnect all disconnected connectors. Turn key to OFF then start engine. Is same DTC present?	Yes	Replace PCM, then go to the next step.
10		No	Go to the next step.
11	VERIFY AFTER REPAIR PROCEDURE Perform the "After Repair Procedure". (See AFTER REPAIR PROCEDURE .) Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE .)
11		No	Troubleshooting completed.