Diagnostic Procedure

DTC P0446 DIAGNOSTIC PROCEDURE TABLE

STEP	INSPECTION		ACTION
1	VERIFY FREEZE FRAME DATA HAVE BEEN RECORDED Have FREEZE FRAME DATA been recorded?	Yes	Go to the next step.
1		No	Record the FREEZE FRAME DATA on the repair order, then go to the next step.
2	VERIFY RELATED REPAIR INFORMATION AVAILABILITY Verify related Service Bulletins and/or on-line repair information 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.
2		No	Go to the next step.
3	INSPECT COV CONTROL (EVAP SYSTEM LEAK DETECTION PUMP) CIRCUIT FOR SHORT TO POWER SUPPLY Turn the ignition switch to the ON position (Engine off). Disconnect the EVAP system leak detection pump connector. Measure the voltage between EVAP system leak detection pump connector terminal C (wiring harness-side) and body ground. Is the voltage B+ ?	Yes	Repair or replace the wiring harness, then go to Step 5.
3		No	Go to the next step.
4	INSPECT COV (EVAP SYSTEM LEAK DETECTION PUMP) Inspect the EVAP system leak detection pump. (See EVAPORATIVE EMISSION (EVAP) SYSTEM LEAK DETECTION PUMP INSPECTION .) Is the COV (EVAP system leak detection pump) normal?	Yes	Go to the next step.
4		No	Replace the EVAP system leak detection pump, then go to the next step. (See EVAPORATIVE EMISSION (EVAP) SYSTEM LEAK DETECTION PUMP REMOVAL/INSTALLATION .)
5	VERIFY TROUBLESHOOTING OF DTC P0446 COMPLETED Make sure to reconnect all disconnected connectors. Turn the ignition switch to the ON position (Engine off) Clear the DTC from the PCM memory using the WDS or equivalent. Perform the evaporative emission test using the WDS or equivalent. (See EVAP SYSTEM LEAK INSPECTION USING WDS OR EQUIVALENT .) Is the same DTC present? NOTE: If evaporative system test function is not available, perform the following procedure: Perform the EVAP System Repair Verification Drive Mode. (See OBD-II DRIVE MODE .) Is the PENDING CODE the same as the DTC present?	Yes	Replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION .)
5		No	Go to the next step.
6	VERIFY AFTER REPAIR PROCEDURE Perform "AFTER REPAIR PROCEDURE". (See AFTER REPAIR PROCEDURE .) Is any DTC present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE .)
6		No	Troubleshooting completed.