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TSB Revision DIAGNOSTIC TROUBLE CODE PROCEDURES 13Ac-237 TROUBLESHOOTING HINTS (The most likely • Left bank heated oxygen sensor (rear) failed. • Open circuit in left bank heated oxygen sensor (rear) output line. • Open circuit in left bank heated oxygen sensor (rear) ground line. • PCM failed. DIAGNOSIS Required Special Tools: • MB991502: Scan Tool (MUT-II) • MD998464: Test Harness STEP 1. Using scan tool MB991502, check data list item 59: CAUTION To prevent damage to scan tool MB991502, always turn the 59, Heated Oxygen Sensor Bank 2, Sensor 2 (left rear). • Warming up the engine. When the engine is revved, the output voltage should repeat 0 volt and 0.6 to 1.0 volt (4) Turn the ignition switch to the "LOCK" (OFF) position. YES : It can be assumed that this malfunction is intermittent. Refer to GROUP 00, How to Use Troubleshooting/ NO : Go to Step 2. ACX01539 16-PIN MB991502 AC |