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AUTOMATIC TRANSMISSION DIAGNOSIS TSB Revision AUTOMATIC TRANSMISSION 23A-381 STEP 7. Using scan tool MB991958, check data list item 65: CAUTION To prevent damage to scan tool MB991958, always turn the • Item65: Dual Pressure Switch. • When the A/C is in operation, the scan tool MB991958 display should be "ON." • When the A/C is not in operation, the scan tool MB991958 display should be "OFF." (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 − How to Cope with Intermittent Malfunction . NO : Check the air conditioning system. Refer to GROUP 55, Troubleshooting Strategy AK303629AB MB991911 MB991827 MB991824 16-PIN |