Mercedes Benz Workshop Service and Repair Manuals

Pick-Up Coil: Electrical Specifications

Test Specifications

Cranking Voltage.............................................................................................................................................................................................at least 10 VDC

Ignition System Voltages

terminal 15 to ground..............................................................................................................................................................................battery voltage
(terminal 5 at the diagnostic socket)
between terminal 15 and 1...................................................................................................................................................................................0 VDC
(terminal 5 and 4 at the diagnostic socket)
between terminal 15 and 31 (on 4 pole plug on switching unit)..............................................................................................................battery voltage
between terminal 16 and 31 (on 4 pole plug on switching unit)..............................................................................................................battery voltage

Resistance of Ignition Coil

primary winding (terminal 15 to 1) .........................................................................................................................................................0.3 - 0.6 Ohms
secondary winding (terminal 1 to 4)..........................................................................................................................................................6 - 15k Ohms

Transmitter Resistance

terminal 7 to 3........................................................................................................................................................................................500 - 700 Ohms
terminal 7 to ground..........................................................................................................................................................................at least 200k Ohms
terminal 3 to ground..........................................................................................................................................................................at least 200k Ohms

Dwell at terminal TD

at cranking speed..................................................................................................................................................................................................5 - 23°
at 1500 rpm........................................................................................................................................................................................................33 - 51°
at 5000 rpm........................................................................................................................................................................................................45 - 55°

Resistance 500 - 700 ohms