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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) 13A-737 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 . TROUBLESHOOTING HINTS (The most likely • Malfunction of the ignition system. • Malfunction of the injector system. • Contaminated fuel. • Poor compression. • Malfunction of the PCM. • Malfunction of the immobilizer system. DIAGNOSIS Required Special Tools: • MB991958: Scan Tool (MUT-III Sub Assembly) • MB991824: V.C.I • MB991827: USB Cable • MB991911: Main Harness B STEP 1. Measure the battery positive voltage. • The voltage should remain greater than 8 volts while the engine is cranked. Q: Dose the voltage remain greater than 8 volts while the engine is cranked? − Battery Check . STEP 2. Using scan tool MB991958, read the diagnostic CAUTION To prevent damage to scan tool MB991958, always turn the YES : Refer to Diagnostic Trouble Code Chart NO : Go to Step 3. AK303629AB MB991911 MB991827 MB991824 16-PIN |