Contents - Volkspage

Ignition systems 5B.3
9 Disconnect the LT cable from the ignition
coil at the multiway connector (refer to
illustration 3.8).
10 Slacken and withdraw the mounting
screws, remove the brackets and detach the
earthing strap (where applicable). Remove the
ignition coil from the engine bay.
Refitting
11 Refitting is a reversal of removal.
3.3 Ignition coil primary and secondary
winding terminals
A Primary winding terminals
B Secondary winding terminals
check and renew them if there is any doubt
about their condition.
14 If no HT voltage is present, check the
ignition coil; its secondary windings may be
breaking down under load.
Testing
1 The resistance of the coil windings may be
tested without removing the unit from the
engine bay. Note that the measurements
taken will be affected by ambient
temperature, so it is good idea to conduct this
test after the engine has been running for a
while, as the coil will then be at its normal
operating temperature.
2 Disconnect the battery negative cable and
position it away from the terminal.
3 Connect the probes of a multimeter set to
the resistance measurement function across
the primary winding terminals (1 and 15)
(see illustration). Record the resistance
indicated. Note: On G40 mode/s with a
cylindrical ignition coil, the primary resistance
is measured between the ‘+’ and ´-’ terminals.
4 Repeat the measurement at the secondary
winding terminals (4 and 15) (refer to
illustration 3.3). Note: On G40 models with a
cylindrical ignition coil, the secondary
3.8 Ignition coil connectors
A HT cable connector
B LT cable multiway connector
Removal
resistance is measured between the HT lead 1 Disconnect the battery negative cable and
terminal and ‘-’ terminal.
position it away from the terminal.
5 Compare the measurements with the Specifications
and renew the coil if necessary. referring to of Chapter 2A for guidance.
2 Set the engine to TDC on cylinder No 1,
Note: This test pinpoints short or open circuits 3 If required, unplug all five HT leads from the
within the ignition coil, but does not a/low distributor cap - label them to aid refitting later
diagnosis of failures that occur whilst the coil (see illustration).
is under load. Under these circumstances, the 4 Unplug the screening cap earth strap from
coil should be tested by an automotive the distributor body (see illustration).
electrical specialist.
5 Unplug the Hall sensor cable from the
distributor body at the connector (see
Removal
illustration).
6 On all models, the ignition coil is mounted 6 Remove the screws or prise off the
at the front left hand corner of the engine bay. retaining clips (as applicable), then lift off the
7 Disconnect the battery negative cable and distributor cap. Check at this point that the
position it away from the terminal.
centre of the rotor arm electrode is aligned
8 Unplug the HT lead from the ignition coil at with the cylinder No 1 marking on the
the connector (see illustration).
distributor body (see illustrations).
4.3 If required, unplug all five HT leads
from the distributor cap
4.4 Unplug the screening cap earth strap
from the distributor body
4.5 Disconnect the Hall sender cable from
the distributor at the multiway connector
(arrowed)
4.6a Prise off the retaining clips . . . 4.6b . . . then lift off the distributor cap