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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE> 13A-531 STEP 2. Measure the power supply voltage at power backprobing. • When steering wheel is not turned, voltage should be battery positive voltage. • When steering wheel is turned, voltage should be 1 volt or less. (4) Turn the ignition switch to the "LOCK" (OFF) position. YES : Go to Step 3. STEP 3. Check harness connector B-122 at power steering YES : Go to Step 4. Connector Inspection . Then go to Step 13. STEP 4. Using scan tool MB991958, check data list item 83: 83, Power Steering Pressure Switch. • If the steering wheel is not turned while idling, "OFF" will be displayed. • If the steering wheel is turned while idling, "ON" will be displayed. (3) Turn the ignition switch to the "LOCK" (OFF) position. YES : It can be assumed that this malfunction is intermittent. Refer to GROUP 00, How to Use − How to Cope with Intermittent Malfunctions . NO : Replace the ECM. When the ECM is replaced, register the ID code. Refer to GROUP 42B, Diagnosis or GROUP 42C, Diagnosis − ID Codes Registration Judgment Table <Vehicles with . Then go to Step 13. STEP 5. Check harness connector B-122 at power steering YES : Go to Step 6. Connector Inspection . Then go to Step 13. 1 AK202987 B-122 harness AF |