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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) 13A-847 INSPECTION PROCEDURE 5: Cranks, Won't Start . Cranks, Won't Start Circuit • Refer to Ignition circuit . CIRCUIT OPERATION • Refer to Ignition circuit . COMMENT • In cases such as the above, the cause is proba- bly no spark, fuel delivery, or fuel quality prob- . TROUBLESHOOTING HINTS (The most likely • Malfunction of the ignition system. • Malfunction of the fuel pump system. • Malfunction of the injector system. • Malfunction of the PCM. • Contaminated fuel. • 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 • MB991348: Test Harness STEP 1. Check the battery positive voltage. • The voltage should be 8 volts or more. Q: Is the voltage normal? YES : Go to Step 2. − Battery Check . Then confirm that the malfunction symptom is eliminated. STEP 2. Check the timing belt for breaks. YES : Go to Step 3. symptom is eliminated. |