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STEP 2. 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 the "LOCK" (OFF) position. Q:Is any DTC set? YES: Refer to Diagnostic Trouble Code Chart P.13Ab-44. NO: Go to Step 3. STEP 3. Using scan tool MB991958, check data list. (1) Turn the ignition switch the "ON" position. (2) Check the following items in the data list. Refer to Data List a Item 01: Power Supply Voltage (at Cranking) b Item 06: Engine Coolant Temperature Sensor. (3) Turn the ignition switch the "LOCK" (OFF) position. Q:Is the sensor operating properly? YES: Go to Step 4. NO: Repair or Replace. Then confirm that the malfunction symptom is eliminated. STEP 4. Using scan tool MB991958, check actuator test. (1) Turn the ignition switch to the "ON" position. (2) Check the following items in the actuator test. Refer to a Item 09: Fuel Pump. (3) Turn the ignition switch to the "LOCK" (OFF) position. Q:Is the actuator operating properly? YES: Go to Step 5. NO: Repair or Replace. Then confirm that the malfunction symptom is eliminated. STEP 5. Check the ignition timing. (1) Check the ignition timing at cranking. Standard value: 5° BTDC ± 3° MULTIPORT INJECTION SYSTEM (MFI) <DIAGNOSIS> 13Ab-771 SYMPTOM PROCEDURES |