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AUTO-CRUISE CONTROL TSB Revision ENGINE AND EMISSION CONTROL 17-29 CAUTION • If there is any problem in the CAN bus lines, an incor- rect DTC may be set. Prior to this diagnosis, diagnose • Whenever the ECM is replaced, ensure that the CAN bus lines are normal. STEP 1. Using scan tool MB991958, diagnose the CAN bus AC608435 Data link connector MB991827 MB991824 MB991910 AB CAUTION To prevent damage to scan tool MB991958, always turn the (Refer to ). (2) Turn the ignition switch to the "ON" position. (4) Turn the ignition switch to the "LOCK" (OFF) position. YES : Go to Step 2 Diagnosis − Can Bus Diagnostic Chart Then go to Step 16. STEP 2. Using scan tool MB991958, check data list item 74: (Refer to ). (2) Turn the ignition switch to the "ON" position. control system (Refer to ). • Item 74: Brake light switch. • When the brake pedal is depressed, the display on scan tool MB991958 should be "ON". • When the brake pedal is released, the display on scan tool MB991958 should be "OFF". (4) Turn the ignition switch to the "LOCK" (OFF) position. |