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Home >> Dodge and Ram >> 1996 >> Caravan Base, 2.4 B >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - 2.4L >> Trouble Code Tests >> Test TC-113A - EVAP Purge Flow Monitor Failure

Test TC-113A - EVAP Purge Flow Monitor Failure

NOTE: EVAP purge solenoid may be referred to as EVAP solenoid.
NOTE: For connector terminal ID, see CONNECTOR IDENTIFICATION DIRECTORY  . For wiring diagram, see WIRING DIAGRAMS - 2.4L article.
  1. Using scan tool, clear Diagnostic Trouble Codes (DTCs) from Powertrain Control Module (PCM). Start and warm engine until engine coolant temperature is greater than 180°F (82°C). Shut engine off.
  2. Disconnect vacuum hose at EVAP purge solenoid that goes to the EVAP canister. See Fig 1 . The EVAP purge solenoid is located near passenger's side strut tower.
    Fig 1: Identifying EVAP Purge Solenoid & Vacuum Hoses
    G95B35049
  3. Start engine. There should be no vacuum at EVAP purge solenoid where the vacuum hose goes to the EVAP canister for 1-2 minutes.
  4. If vacuum exists within one minute, replace EVAP purge solenoid. Perform TEST VER-5A. If vacuum does not exist within one minute, go to next step.
  5. After 90 seconds, check that vacuum is cycling intermittently at a steady rate. If vacuum is not cycling intermittently at a steady rate, go to step 8). If vacuum is cycling intermittently at a steady rate, go to next step.
  6. Turn ignition off. Apply no more than 5 psi (.35 kg/cm2 ) air pressure on vacuum hose that goes to the EVAP canister. DO NOT exceed 5 psi (.35 kg/cm2 ) air pressure on vacuum hose. If air will not flow through vacuum hose and EVAP canister, perform TEST TC-113B. If air will flow through vacuum hose and EVAP canister, go to next step.
  7. Conditions required to set DTC are not present at this time. The DTC may be stored in PCM if no vacuum flow through EVAP system is detected by the EVAP monitor. Possible causes are: defective vacuum hoses, cracked plastic connector at EVAP purge solenoid, defective EVAP purge solenoid, restricted vacuum hose from EVAP purge solenoid to EVAP canister, restricted vacuum hose from throttle body to EVAP purge solenoid.
  8. Disconnect vacuum hose at EVAP purge solenoid that goes to the throttle body. See Fig 1 . Install vacuum gauge on vacuum hose that goes to throttle body.
  9. If vacuum gauge indicates manifold vacuum, go to next step. If vacuum gauge does not indicate manifold vacuum, repair/replace vacuum hose/throttle body as necessary. Perform TEST VER-5A.
  10. Reinstall vacuum hose on EVAP purge solenoid that goes to the throttle body. Connect vacuum gauge on the port on EVAP purge solenoid that goes to the EVAP canister.
  11. If vacuum gauge indicates 3-7 in. Hg of vacuum, go to next step. If vacuum gauge does not indicate 3-7 in. Hg of vacuum, replace EVAP purge solenoid. Perform TEST VER-5A.
  12. Using vacuum pump, apply more than 2 in. Hg of vacuum on the vacuum hose that goes to EVAP canister. If vacuum holds steady, go to next step. If vacuum does not hold steady, replace EVAP purge solenoid. Perform TEST VER-5A.
  13. Check for restricted vacuum hose to EVAP canister. If vacuum hose is restricted, repair as necessary. Perform TEST VER-5A. If vacuum hose is not restricted, go to next step.
  14. Check for restricted fuel tank vent port on top of EVAP canister. This is the vent port that goes to the fuel tank. EVAP canister is located on frame rail, directly below the driver's seat. If fuel tank vent port is restricted, clean fuel tank vent port and retest system. Perform TEST VER-5A. If fuel tank vent port is not restricted, replace EVAP canister. Perform TEST VER-5A.
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