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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE> 13A-99 TECHNICAL DESCRIPTION • The TPS outputs voltage which corresponds to • The ECM <M/T> or PCM <A/T> checks whether DTC SET CONDITIONS Check Conditions • Two seconds or more have passed since the • Engine speed is higher than 2,000 r/min. • Volumetric efficiency is higher than 60 percent. Judgement Criteria • TPS output voltage has continued to be 0.8 volt TROUBLESHOOTING HINTS (The most likely • TPS failed or maladjusted. • Open or shorted TPS circuit, or loose connector. • ECM failed. <M/T> • PCM failed. <A/T> DIAGNOSIS Required Special Tools STEP 1. Using scan tool MB991502, check data list item 14: CAUTION To prevent damage to scan tool MB991502, always turn the 14, Throttle Position Sensor. • With the throttle valve in the idle position, voltage should • With the throttle valve in the full-open position, voltage (4) Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the sensor operating properly? YES : It can be assumed that this malfunction is intermittent. Refer to GROUP 00, How to Use Troubleshooting/ NO : Go to Step 2. STEP 2. Check connector B-07 at throttle position sensor YES : Go to Step 3. Connector Inspection ( ). Then go to Step 9. AKX01177 16 PIN MB991502 AB ACX02472 CONNECTOR : B-07 THROTTLE AE |