DTC P0443: EVAP PURGE SOLENOID CIRCUIT Dodge Ram Van B2500

Note. For connector terminal identification, see CONNECTOR IDENTIFICATION . For circuit identification and wiring diagram, see RAM VAN & RAM WAGON wiring diagram in WIRING DIAGRAMS article.

Note. DTC P0443: EVAP PURGE SOLENOID CIRCUIT is monitored immediately after ignition is turned on with battery voltage more than 10.4 volts. DTC may be stored in Powertrain Control Module (PCM) if actual state of EVAP purge solenoid does not match the intended state when requested to operate by PCM. Possible causes are: defective EVAP purge solenoid, defective PCM, defective connectors or defective wiring.

Note. EVAP purge solenoid may also be referred to as EVAP canister purge solenoid or duty cycle EVAP purge solenoid.

1. Turn ignition on, with engine off. Using scan tool, read DTCs. If DTC SPECIFIC GOOD TRIP COUNTER is displayed and displayed count is "0", go to step 4). If DTC SPECIFIC GOOD TRIP COUNTER is not displayed or displayed count is not "0", go to next step.
2. Turn ignition on, with engine off. Using scan tool, determine if DTC matches FREEZE FRAME DTC. If DTC is equal to FREEZE FRAME DTC, go to next step. If DTC is not equal to FREEZE FRAME DTC, repair DTC using FREEZE FRAME data.
3. Turn ignition on, with engine off. Using scan tool, read and record FREEZE FRAME data. Try to duplicate conditions in FREEZE FRAME data. If DTC SPECIFIC GOOD TRIP COUNTER is displayed and displayed count is "0", go to next step. If DTC SPECIFIC GOOD TRIP COUNTER is not displayed or displayed count is not "0", go to step 9).
4. Turn engine off. Disconnect EVAP purge solenoid connector. EVAP purge solenoid is located on a bracket mounted to left front inner fender. Clean and/or repair connector as necessary. Turn ignition on, with engine off. Using a voltmeter, check voltage on EVAP purge solenoid connector, fused ignition switch output circuit (White wire). If voltage is more than 10 volts, go to next step. If voltage is 10 volts or less, repair open fused ignition switch output circuit. Perform TEST VER-5A.
5. Turn ignition off. Disconnect PCM connectors. PCM is located in engine compartment. See PCM LOCATION table under SYSTEM DIAGNOSTICS. Clean and/or repair connectors as necessary. Turn ignition on, with engine off. Using a voltmeter, check voltage on PCM connector, EVAP purge solenoid control circuit (Pink/Black wire). If voltage is more than 10 volts, go to next step. If voltage is 10 volts or less, replace EVAP purge solenoid. Perform TEST VER-5A.
6. Turn ignition off. Ensure EVAP purge solenoid and PCM connectors are still disconnected. Using an ohmmeter, check resistance of EVAP purge solenoid control circuit (Pink/Black wire) between EVAP purge solenoid connector and PCM. If resistance is 5 ohms or more, repair open EVAP purge solenoid circuit . Perform TEST VER-5A. If resistance is less than 5 ohms, go to next step.
7. Ensure ignition is off. Ensure EVAP purge solenoid and PCM connectors are still disconnected. Using ohmmeter, check resistance between ground and PCM connector, EVAP purge solenoid control circuit (Pink/Black wire). If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair EVAP purge solenoid control circuit for short to ground. Perform TEST VER-5A.
8. At this time, PCM is assumed to be defective. Replace PCM. Perform TEST VER-5A.
9. Turn ignition on, with engine off. Using scan tool, actuate EVAP purge solenoid and wiggle wiring harness from EVAP purge solenoid to PCM. If EVAP purge solenoid stopped actuating while wiggling wiring harness, repair wiring harness where wiggling caused problem to appear. Perform TEST VER-5A. If EVAP purge solenoid did not stop actuating while wiggling wiring harness, go to next step.
10. Turn ignition off. Visually inspect related connectors, hoses and wiring harness for damage. Repair connectors, hoses and wiring harness as necessary. Perform TEST VER-5A. If connectors, hoses and wiring harness are okay, test is complete.