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MULTIPORT FUEL INJECTION(MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) <3.0L> 13B-357 STEP 1. Using scan tool MB991502, check data list item 27: CAUTION To prevent damage to scan tool MB991502, always turn the 27, Power Steering Pressure Switch. • If the steering wheel is stopped while idling, "OFF" will • If the steering wheel is steered while idling, "ON" will be (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 the power supply voltage at power steering backprobing. • When steering wheel is stationary, voltage should be • When steering wheel is turned, voltage should be 1 volt (4) Turn the ignition switch to the "LOCK"(OFF) position. Q: Is the voltage normal? YES : Go to Step 3. STEP 3. Check connector B-44 at power steering pressure YES : Go to Step 4. Connector Inspection( ). Then go to Step 14. AC003081 AB 16 PIN MB991502 AK000259 B-44 CONNECTOR 1 AC ACX02522 CONNECTOR:B-44 POWER AF |