MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L>
13A-761
INSPECTION PROCEDURE 6: Fires Up and Dies.
.
COMMENT
• In such cases as the above, the cause is usually
improper air/fuel mixture. It is possible, though
less likely, that the spark plugs are generating
sparks but the sparks are weak.
.
TROUBLESHOOTING HINTS (The most likely
causes for this case: )
• Malfunction of the ignition system.
• Malfunction of the injector system.
• Contaminated fuel.
• Poor compression.
• Malfunction of the ECM <M/T> or PCM <A/T>.
DIAGNOSIS
Required Special Tools:
• MB991958 (MUT-III Sub Assembly)
• MB991824: V.C.I.
• MB991827: USB Cable
• MB991911: Main Harness B
STEP 1. Measure the battery positive voltage.
(1) Measure the battery positive voltage during cranking.
• The voltage should be 8 volts or more.
Q: Is the voltage normal?
YES : Go to Step 2.
NO : Refer to GROUP 54A, Battery
− Battery check
P.54A-5
.
STEP 2. Using scan tool MB991958, read the diagnostic
trouble code (DTC).
CAUTION
To prevent damage to scan tool MB991958, always turn the
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Read the DTC.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is DTC set?
YES : Refer to, Diagnostic Trouble Code Chart
P.13A-24
.
NO : Go to Step 3.
AK300810
AB
MB991911
16-PIN
MB991827
MB991824