Notes on avoiding damage to the ignition system - AH15.10-P-0002-01E

Engines 103, 104, 119 with CFI continuous fuel injection system 

• To avoid damage to the control module connect and disconnect the two connectors on the control module only when the ignition is switched off.
• Terminal 1 of ignition coils must not be short-circuited to GND, e.g. as anti-theft protection.
• Install only original ignition system components.
• Do not operate ignition system at starting speed unless all of the ignition cables are connected.
• No tests such as holding ignition cable 4 at a distance to GND, unplugging a spark plug connector or pulling cable 4 out of the ignition coils, may be performed at starting speed or when the engine is running.
• A load of at least 2 k Ω must be applied to each high voltage circuit (spark plug connector).
• If it is necessary to test the ignition spark when providing breakdown assistance, this must only be done with a spark plug at a cylinder ignition cable. Ensure that the spark plug has good contact to ground.
• Before commencing work at starting speed, for example testing compression, switch ignition off and unplug the socket(s) of the crankshaft position sensor at the DI control module.
• To ensure good heat dissipation, the DI control module is installed with heat-conducting paste at the wheel-housing panel. When replaced, the protective sheet must not be removed; it does not impair heat dissipation.

  Use of testers 

• Connect and disconnect secondary measuring sensors to corresponding ignition leads only when engine and ignition are shut off.
• If the shot-circuit protection is operated (cylinder comparison) and the engine stops, it is not possible to conduct the test with this tester.
• Do not connect test lamp to ignition coil terminals 1 and 15.