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STEP 1. Using scan tool MB991958, read the diagnostic ZC501967 AC404789 ZC5019680000 MB991824 MB991827 MB991910 Data link connector To prevent damage to scan tool MB991958, always turn the (1) Connect scan tool MB991958 to the data link connector. (2) Turn the ignition switch to the "ON" position. (3) Read the DTC. (4) Turn the ignition switch to the "LOCK" (OFF) position. Q:Is DTC P0451 set? YES: Refer to DTC P0451 - Evaporative Emission Control System Pressure Sensor Range/Performance P.13Ab-495. NO: Go to Step 2. STEP 2. Using scan tool MB991958, check data list item 52: (1) Turn the ignition switch to the "ON" position. (2) Remove the fuel cap. (3) Set scan tool MB991958 to the data reading mode for item ⦆ The fuel tank differential pressures should be 1,500 and (4) Turn the ignition switch to the "LOCK" (OFF) position. Q:Is the fuel tank pressure between 1,500 and 3,500 millivolts? YES: Go to Step 3. NO: Refer to DTC P0451 - Evaporative Emission Control System Pressure Sensor Range/Performance P.13Ab-495. STEP 3. Using scan tool MB991958, check actuator test item (1) Turn the ignition switch to the "ON" position. (2) Set scan tool MB991958 to the actuator test mode for item ⦆ An operation sound should be heard and vibration should (3) Turn the ignition switch to the "LOCK" (OFF) position. Q:Is the solenoid operating properly? YES: Go to Step 4. NO: Replace the evaporative emission purge solenoid. Then go to Step 6. MULTIPORT INJECTION SYSTEM (MFI) <DIAGNOSIS> 13Ab-459 DIAGNOSTIC TROUBLE CODE PROCEDURES |