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Inspection procedure 13: The engine stalls decelerating
 
 
 
 
COMMENT
  • Abnormal air/fuel ratio or other similar defects due to insufficient intake air volume and defective EGR system is suspected to be the causes.
 
 
TROUBLESHOOTING HINTS (The most likely causes for this case: )
  • Ignition system failed.
  • Purge control system failed.
  • EGR system failed.
  • Dirtiness around throttle valve.
  • ECM failed.

 
 
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
  • MB991958: Scan Tool (M.U.T.-III Sub Assembly)
    • MB991824: Vehicles Communication Interface (V.C.I.)
    • MB991827: M.U.T.-III USB Cable
    • MB991910: M.U.T.-III Main Harness A (Vehicles with CAN communication system)
STEP 1. Check if the EGR valve sounds during initialization.
Is the initialization sound heard in the EGR valve?
Go to Step 2.
Refer to GROUP 17, Emission Control - Exhaust Gas Recirculation (EGR) System - EGR Valve (Stepper Motor) Check .
 
STEP 2. Using scan tool (M.U.T.-III), read the diagnostic trouble code (DTC).
cautionTo prevent damage to scan tool (M.U.T.-III), always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool (M.U.T.-III).
(1) Connect scan tool (M.U.T-III). Refer to HOW TO CONNECT THE SCAN TOOL (M.U.T.-III) .
(2) Turn the ignition switch to the "ON" position.
(3) Read the DTC.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Is any DTC stored?
Refer to Diagnostic Trouble Code Chart .
Go to Step 3.
 
STEP 3. Inspection of throttle body (throttle valve area) for dirtiness.
Is the throttle valve area dirty?
Refer to Throttle Body (throttle valve area) Cleaning .
Go to Step 4.
 
STEP 4. Engine stall reproduction test.
Does the engine stall during the decrease in engine speed after running?
Go to Step 6.
Go to Step 5.
 
STEP 5. Using scan tool (M.U.T-III), check actuator test.
(1) Turn the ignition switch to the "ON" position.
(2) Check the following item in the actuator test. Refer to Actuator Test Reference Table .
  1. Item 10: Evaporative Emission Purge Solenoid.
(3) Turn the ignition switch to the "LOCK" (OFF) position.
Is the actuator operating properly?
Go to Step 6.
Repair or replace it. Then confirm that the malfunction symptom is eliminated.
 
STEP 6. Using scan tool (M.U.T.-III), check data list.
(1) Turn the ignition switch to the "ON" position.
(2) Check the following items in the data list. Refer to Data List Reference Table .
  1. Item 11: Accelerator Pedal Position Sensor (main)
  2. Item 12: Accelerator Pedal Position Sensor (sub)
  3. Item 13: Throttle Position Sensor (main)
  4. Item 15: Throttle Position Sensor (sub)
(3) Turn the ignition switch to the "LOCK" (OFF) position.
Are they operating properly?
Go to Step 7.
Repair or replace it. Then confirm that the malfunction symptom is eliminated.
 
STEP 7. Check the spark plugs.
Refer to GROUP 16, Ignition System - On-vehicle Service - Spark Plug Check and Cleaning .
Are there any abnormalities?
Replace the spark plug. Then confirm that the malfunction symptom is eliminated.
Check the ignition coil (Refer to GROUP 16, Ignition System - On-vehicle Service - Ignition Coil Check ). Then confirm that the malfunction symptom is eliminated.