Repair of Motronic units
Modern distributors are not repairable, in most cases the distributor just needs to be replaced.
High voltage converter (see fig. 313)
Rice.
313 High voltage converter - VR6 engine Volkswagen Transporter T4 1 - Hall sensor, 2 - bolt, 10 Nm, 3 - high-voltage wire guide, 4 - thrust ring, 5 - harness, 6 - cap with resistor, 7 - high voltage converter, 8 - bracket, 9 - connector, 10 - knock sensor mounting bolt, 20Nm, 11, 13 - knock sensors (2/1), 12 - sensor disc, 14 - bolt, 100Nm, 15 - spark plug, 25 Nm, 16 - spark plug cap with high voltage wire, 17 - o-ring, 18 - harness
Checking the resistance of the secondary winding of the ignition coil is different from that of the 2.0L engine, it is described below.
Checking the secondary resistance of the ignition coil
♦ Connect one ohmmeter lead to terminal (4, see fig. 314) of the high voltage converter, and connect the other in series first to the cylinder terminals (1) and (6), then to the cylinder terminals (3) and (4), and finally to the cylinder terminals (2) and (5). Normal resistance is 3.6 to 4.4 kΩ. If the measured resistance is not correct, the high voltage converter will have to be replaced.
Rice. 314 High voltage converter test