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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE> 13B-753 STEP 3. Measure the power supply voltage at data link • Voltage should be battery positive voltage. Q: Is battery positive voltage (approximately 12 volts) present? connector C-317 (terminal No. 8) and data link STEP 4. Check the continuity at data link connector C-125. ground. • Should be less than 2 ohms. Q: Does continuity exist? YES : Check and replace the scan tool. Then confirm that the malfunction symptom is eliminated. NO : Repair an open circuit or harness damage between data link connector C-125 (terminal No. 4, No. 5) and INSPECTION PROCEDURE 2: The Malfunction Indicator Lamp (SERVICE ENGINE SOON or Check . CIRCUIT OPERATION • The combination meter causes the malfunction indicator lamp (SERVICE ENGINE SOON or . TROUBLESHOOTING HINTS (The most • Malfunction of the malfunction indicator lamp (SERVICE ENGINE SOON or Check Engine • Open or shorted malfunction indicator lamp (SERVICE ENGINE SOON or Check Engine AK700202 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 AB C-125 harness AK700203 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 AB C-125 harness |