Test TC-23A - EVAP Purge Solenoid Circuit (DTC 31)

WARNING: This page is about a different car, the 1995 Plymouth Voyager, 1995 Plymouth Grand Voyager, 1995 Dodge Grand Caravan, 1995 Dodge Caravan, and 1995 Chrysler Town & Country. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: For circuit and connector terminal identification, see CONNECTOR IDENTIFICATION . For wiring diagrams, see WIRING DIAGRAMS section at the end of this article.

Using scan tool, erase DTCs, actuate Evaporative (EVAP) purge solenoid, and read DTCs. If scan tool does not display EVAP PURGE SOLENOID CIRCUIT, go to next step. If scan tool displays EVAP PURGE SOLENOID CIRCUIT, go to step 5).
Condition required to set DTC is not present at this time. EVAP PURGE SOLENOID CIRCUIT DTC sets if EVAP purge solenoid is not in its proper state when monitored by Powertrain Control Module (PCM). Possible causes are: open or shorted EVAP purge solenoid, open EVAP purge solenoid power supply circuit (Dark Blue/White wire), open or shorted EVAP purge solenoid ground circuit (Pink/Black wire), or failed Powertrain Control Module (PCM). Go to next step.
Inspect all related wiring and connectors, and repair as necessary. Perform TEST VER-2. If no problems are found with wiring and connectors, go to next step.
Using scan tool, read DTCs. EVAP purge solenoid actuation test should still be running. Wiggle wiring harness from EVAP purge solenoid to Powertrain Control Module (PCM). If EVAP PURGE SOLENOID CIRCUIT DTC returns, repair wiring harness as necessary. Perform TEST VER-2. If EVAP PURGE SOLENOID CIRCUIT DTC does not return, see INACTIVE DTC CONDITION . Perform TEST VER-2.
Turn ignition off. Disconnect EVAP purge solenoid connector. Turn ignition on. Using scan tool in voltmeter mode, check voltage on EVAP purge solenoid connector Dark Blue/White wire. If voltage is less than 10 volts, repair open Dark Blue/White wire. Perform TEST VER-2.
If voltage is more than 10 volts, turn ignition off. Disconnect Powertrain Control Module (PCM) connector. Using an external ohmmeter, check resistance of ground circuit (Pink/Black wire) between EVAP purge solenoid connector and PCM connector terminal No. 52. If resistance is less than 5 ohms, repair short to ground in Pink/Black wire. Perform TEST VER-2.
If resistance is more than 5 ohms, reconnect EVAP purge solenoid connector. Turn ignition on. Using scan tool in voltmeter mode, check voltage on PCM connector terminal No. 52 (Pink/Black wire). If voltage is less than 10 volts, replace EVAP purge solenoid. Perform TEST VER-2. If voltage is more than 10 volts, replace PCM. Perform TEST VER-2.