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Home >> Jeep >> 1996 >> Grand Cherokee Limited, 5.2 Y >> Repair and Diagnosis >> External Pages >> Different car >> Section 3 (Engine Controls - Tests W/Codes - 2.5L Flex Fuel) >> Self-Diagnostic Tests >> Test TC-19A - EVAP Purge Solenoid Circuit (DTC 31)

Test TC-19A - EVAP Purge Solenoid Circuit (DTC 31)

WARNING: This page is about a different car, the 1994 Plymouth Acclaim and 1994 Dodge Spirit. 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 DIRECTORY TABLE  . For wiring diagrams, see WIRING DIAGRAMS  .
  1. Using DRB, erase trouble codes. Using DRB, actuate Evaporative (EVAP) purge solenoid. Using DRB, read trouble codes. If DRB displays EVAP PURGE SOLENOID CIRCUIT, go to step 5). If DRB does not display EVAP PURGE SOLENOID CIRCUIT, condition required to set trouble code is not present at this time. Go to next step.
  2. The EVAP PURGE SOLENOID CIRCUIT trouble code sets if evaporative purge solenoid is not in its proper state when monitored by Powertrain Control Module (PCM). Possible causes are: open or shorted evaporative purge solenoid, open evaporative purge solenoid Dark Blue wire, open or shorted evaporative purge solenoid Pink/Black wire or failed PCM. Go to next step.
  3. Inspect all related wiring and connectors and repair as necessary. Perform TEST VER-2  . If no problems were found with wiring and connectors, go to next step.
  4. Using DRB, read trouble codes. Evaporative purge solenoid actuation test should still be running. Wiggle wiring harness from evaporative purge solenoid to PCM. If EVAP PURGE SOLENOID CIRCUIT trouble code returned, repair wiring harness as necessary. Perform TEST VER-2. If EVAP PURGE SOLENOID CIRCUIT trouble code did not return, see INACTIVE TROUBLE CODE CONDITION  . Perform TEST VER-2.
  5. Turn ignition off. Disconnect evaporative purge solenoid connector. Turn ignition on. Put DRB in voltmeter mode. Using DRB, check voltage on solenoid connector Dark Blue wire. If voltage is less than 10 volts, repair open in appropriate wire. Perform TEST VER-2.
  6. If voltage is more than 10 volts, turn ignition off. Disconnect Powertrain Control Module (PCM) connector. Using an external ohmmeter, check resistance of Pink/Black wire between evaporative 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  .
  7. If resistance is more than 5 ohms, reconnect evaporative purge solenoid connector. Turn ignition on. Put DRB in voltmeter mode. Using DRB, check voltage on PCM connector terminal No. 52 (Pink/Black wire). If voltage is less than 10 volts, replace evaporative purge solenoid. Perform TEST VER-2. If voltage is more than 10 volts, replace PCM. Perform TEST VER-2.
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