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ON-VEHICLE SERVICE TSB Revision ENGINE MECHANICAL 11A-11 CAUTION To prevent damage to scan tool MB991958, always turn the 3. Set the timing light to the power supply line (terminal No. 4) of the ignition coil No. 1. 4. Start the engine and run it at idle. Standard value: 5 ° BTDC ± 3° 8. If the basic ignition timing is not within the standard value, refer to GROUP 13A, Multiport Fuel Injection (MFI) − Multiport Fuel Injection (MFI) Diagnosis − Symptom Chart . CAUTION If the actuator test is not canceled, the forced drive will Standard value: Approximately 10 ° BTDC NOTE: Ignition timing fluctuates about ± 7 ° Before Top Dead Center, even under normal operating condition. ° to 10 ° Before Top Dead Center at higher altitudes. NOTE: Wait till approximately 1 minute passes after the 11.Remove the timing light. AC608435 Data link connector MB991827 MB991824 MB991910 AB AK703277 M 1 2 3 4 AD Power supply line Equipment side No. 1 ignition coil |