INSPECTION PROCEDURE 2: Engine Cranks, but does not Start: Diagnosis

Required Special Tools: 

• MB991223: Harness Set
• MB992006: Extra Fine Probe
• MB991958: Scan Tool (M.U.T.-III Sub Assembly)
  • MB991824: V.C.I.
  • MB991827: M.U.T.-III USB Cable
  • MB991910: M.U.T.-III Main Harness A

1. STEP 1. Check the fuse number 2 (junction block). 

   Check that fuse number 2 (junction block) is in good condition.

   Q: Is fuse number 2 (junction block) in good condition? 

   YES:  Go to Step  2.

   NO:  Repair the fuse number 2 (junction block).

   Fig 1: Locating Fuse Number 2 (Junction Block)

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2. STEP 2. Check the ECM < M/T> or the PCM < A/T>. 

   Check the replacing the ECM < M/T> or the PCM < A/T>.

   Q: Was the ECM < M/T> or the PCM < A/T> replaced? 

   YES:  Go to Step  5.

   NO:  Go to Step  3.

3. STEP 3. Check the ETACS-ECU. 

   Check the replacing the ETACS-ECU.

   Q: Was the ETACS-ECU replaced? 

   YES:  Go to Step  6.

   NO:  Go to Step  4.

4. STEP 4. Check the ignition key. 

   Check if the ignition key is replaced.

   NOTE: When adding the ignition key separately, or replacing the steering lock cylinder or key set as shown in illustration, replace the ignition key for starting engine to register the encrypted code.

   Q: Was the ignition key replaced? 

   YES:  Go to Step  7.

   NO:  Go to Step  8.

   Fig 2: Identifying Keys (With Or Without Transmitter)

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   Fig 3: Identifying Steering Lock Cylinder

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   Fig 4: Identifying Ignition Key Set

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5. STEP 5. Check the VIN. 

   Q: Is the VIN recorded? 

   YES:  Go to Step  8.

   NO:  Record the VIN (Refer to ENCRYPTED CODE REGISTRATION CRITERIA TABLE ).

6. STEP 6. Check the VIN. 

   Q: Is the VIN recorded? 

   YES:  Go to Step  7.

   NO:  Record the VIN (Refer to ENCRYPTED CODE REGISTRATION CRITERIA TABLE ). Then go to Step  7.

7. STEP 7. Check the encrypted code. 

   Q: Is the encrypted code reregistered? 

   YES:  Go to Step  8.

   NO:  Register the encrypted code again (Refer to ENCRYPTED CODE REGISTRATION CRITERIA TABLE ).

8. STEP 8. Check the battery voltage. 

   Measure the battery voltage during cranking.

   Q: Is the voltage 8 volts or more? 

   YES:  Go to Step  9.

   NO:  Check the condition of the battery. Refer to BATTERY CHECK .

9. STEP 9. Using scan tool MB991958, read the diagnostic trouble code. 
   CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to "LOCK" (OFF) position before connecting or disconnecting scan tool.
   1. Connect scan tool MB991958 to the data link connector.
   2. Turn the ignition switch "ON" position.
   3. Read the diagnostic trouble code.
   4. Turn the ignition switch to the "LOCK" (OFF) position.

   Q: Have any DTCs set? 

   YES:  Refer to DIAGNOSTIC TROUBLE CODE CHART  .

   NO:  Go to Step  10.

   Fig 5: Connecting Scan Tool To Data Link Connector

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10. STEP 10. Using scan tool MB991958, read the MFI system diagnostic trouble code. 
    1. Turn the ignition switch "ON" position.
    2. Read the diagnostic trouble code.
    3. Turn the ignition switch to the "LOCK" (OFF) position.

    Q: Have any MFI system DTCs set? 

    YES:  Refer to DIAGNOSTIC TROUBLE CODE CHART for 2.4L or DIAGNOSTIC TROUBLE CODE CHART for 3.8L.

    NO:  Go to Step  11.

    Fig 6: Connecting Scan Tool To Data Link Connector

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11. STEP 11. Using scan tool MB991958, other system 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 for 2.4L or DATA LIST REFERENCE TABLE for 3.8L.
       • Item 18: Cranking signal (ignition switch-ST).
    3. Turn the ignition switch to the "LOCK" (OFF) position.

    Q: Is the cranking signal (ignition switch-ST) "ON" position? 

    YES:  Go to Step  12.

    NO:  Refer to SYMPTOM CHART for 2.4L or SYMPTOM CHART for 3.8L.

    Fig 7: Connecting Scan Tool To Data Link Connector

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12. STEP 12. Reregistration of the ignition key 

    Register the encrypted code again (Refer to ENCRYPTED CODE REGISTRATION CRITERIA TABLE ).

    Q: Does the engine start? 

    YES:  The procedure is complete.

    NO:  Go to Step  13.

13. STEP 13. Replace the ECM < M/T> or PCM < A/T>. 

    Replace the ECM < M/T> or PCM < A/T>, and then record the VIN (Refer to  ENCRYPTED CODE REGISTRATION CRITERIA TABLE  ). 

    Q: Does the engine start? 

    YES:  The procedure is complete.

    NO:  Replace the ETACS-ECU, and then record the VIN. Then, register the encrypted code again (Refer to ENCRYPTED CODE REGISTRATION CRITERIA TABLE ).