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Judgement Criterion ⦆ Center exhaust pipe oxygen sensor output voltage OBD-II DRIVE CYCLE PATTERN Refer to Diagnostic Function - OBD-II Drive Cycle - TROUBLESHOOTING HINTS (The most likely ⦆ Center exhaust pipe heated oxygen sensor failed.
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, check data list item AD: 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) Start the engine and run at idle. (3) Set scan tool MB991958 to the data reading mode for item (4) Warm up the engine. ⦆ After increasing the output voltage 0.5 volt or more by the (5) 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 NO: Replace the center exhaust pipe heated oxygen sensor . Then go to Step 2. STEP 2. Test the OBD-II drive cycle. (1) Carry out a test drive with the drive cycle pattern. Refer to (2) Check the diagnostic trouble code (DTC). Q:Is DTC P0145 set? YES: Refer to DTC P0145 - Heated Oxygen Sensor Circuit Low Voltage (bank 1, sensor 3) P.13Ab-244, DTC P0144 - MULTIPORT INJECTION SYSTEM (MFI) <DIAGNOSIS> 13Ab-247 DIAGNOSTIC TROUBLE CODE PROCEDURES |