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DIAGNOSIS Required Special Tools: ⦆ MB991958: Scan Tool (M.U.T.-III Sub Assembly) ⦆ MB991824: V.C.I. ⦆ MB991827: USB Cable ⦆ MB991910: Main Harness A 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 the diagnostic trouble code other than P1235 set? YES: Refer to, Diagnostic Trouble Code Chart P.13Ab-44. NO: Go to Step 2. STEP 2. Using scan tool MB991958, check data list item 10: (1) Start the engine and run at idle. (2) Set scan tool MB991958 to the data reading mode for item (3) Warm up the engine to normal operating temperature: 80°C ⦆ The standard value during idling should be between 1,350 ⦆ When the engine is revved, the mass airflow rate should (4) Turn the ignition switch to the "LOCK" (OFF) position. Q:Is the sensor operating properly? YES: Go to Step 3. NO: Refer to, DTC P0101 - Mass Airflow Circuit Range/ MULTIPORT INJECTION SYSTEM (MFI) <DIAGNOSIS> 13Ab-635 DIAGNOSTIC TROUBLE CODE PROCEDURES |