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MULTIPORT FUEL INJECTION(MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) <3.0L> 13B-317 STEP 19. Using scan tool MB991502, check data list item CAUTION To prevent damage to scan tool MB991502, always turn the 73, Fuel Tank Differential Pressure Sensor. • The fuel tank pressures should be − 1.5 to 1.5kPa. (5) Connect an evaporative emission system pressure pump to the fuel filler neck, and apply pressure. • The scan tool reading should increase. Q: Is the scan tool reading within the specified value? YES : Go to Step 26. STEP 20. Check for clogging in the evaporator line from disconnect hose G from the evaporative emission (2) Install the EVAP pressure pump outlet hose to the fuel tank filler neck as described in the pump manufacturer's (3) On the EVAP pressure pump, set the pressure/hold valve to OPEN, and set the vent valve to CLOSED. (4) Turn the pump timer to ON. You can reset the timer as required. (These settings are listed under "Leak Test" in the (5) When the hose G is unplugged, the air passes through the hose G. Q: Does air pass through the hose G? YES : Go to Step 21. AC003081 AB 16 PIN MB991502 AC000186 AC002028 AB HOSE G OPEN OPEN CLOSED CLOSED Pressure Vent ACX01806 |