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Inspection Procedure 9: Purge flow test of the evaporative emission canister failure
 
 
 
 
COMMENT
The test fails when the purge line or purge port is clogged or if the evaporative emission purge solenoid fails.
 
 
TROUBLESHOOTING HINTS (The most likely causes for this case:)
  • Purge line or purge port is clogged.
  • Evaporative emission purge solenoid failed.
  • Evaporative emission canister is clogged.
 
 
DIAGNOSIS
Required Special Tools:
  • MB992744: Vehicle communication interface-Lite (V.C.I.-Lite)
  • MB992745: V.C.I.-Lite main harness A
  • MB992747: V.C.I.-Lite USB cable short
  • MB992748: V.C.I.-Lite USB cable long
1.STEP 1. Using scan tool (M.U.T.-III SE), read the DTC.
Use scan tool (M.U.T.-III SE) to check and see if a DTC is set in the ECM (Refer to HOW TO READ AND ERASE DIAGNOSTIC TROUBLE CODES).
Q: Is any DTC set?
Perform troubleshooting for the set DTC (Refer to DIAGNOSTIC TROUBLE CODE CHART).
 
2.STEP 2. Using scan tool (M.U.T.-III SE) to perform the evaporative emission system monitor test.
Use scan tool (M.U.T.-III SE) to perform the evaporative emission system monitor test (Refer to EVAPORATIVE EMISSION CONTROL SYSTEM MONITOR TEST).
Q: Is the check result normal?
Check the purge control system (Refer to GROUP 17, Engine, Motor and Emission Control – Emission Control – Evaporative Emission Control System – Purge Control System Check (Purge Flow Check) PURGE CONTROL SYSTEM CHECK (PURGE FLOW CHECK)).
Carry out the diagnostic trouble code procedures related to the item with "Abnormal" indication in the data list (Refer to DIAGNOSTIC TROUBLE CODE CHART).