5-8
Chapter 5 Engine electrical systems
10.1 Use an ohmmeter to check the resistance of the
pick-up coil
10.18 Depending on the year and model of the vehicle, the
pick-up coil can be checked either in the distributor or removed.
TO Distributor electronic components -check and replacement
(T93Ljhrough 1989 models only)
f 983
mod&
Pick-up coil check and replacement
Ftefer to illustration IO. I
1 Using an ohmmeter, measure the resistance of the pick-up coil (see
Iflustration).
Compare the measured resistance to the Specifications
fisted in this Chapter. If the resistance is not correct, replace the pick-up
coil with
a
new unit.
Note: The
resistance of the pick-up coil can be mea-
sured with the pick-up co0 installed in the distributor.
2 To remove the pick-up coil, remove the two mounting screws (see
il-
lustration 9.7a)
and lift the rotor off the governor assembly.
3 Remove the bolt from the shaft and pull off the governor assembly.
Note:
Before thegovernorweightsandspringsare removed, make marks
on the pins and springs for reference on assembly. Also, handle the
-springs very carefully to avoid any deformation which could cause
changes rii ffie advance characteristics.
4 Remove the screws attaching the pick-up coil to the distributor. The
coil and cap gasket can now be lifted out.
Igniter check and replacement
Refer to illustration 10.7
5 Follow the procedure in Steps 2 through 4 and remove the igniter. Re-
fer to illustration 9.7a if problems are encountered.
.
10.7 Set-up for checking the igniter on 1983 distributors
6 Be sure to mark the relationship between the drive gear and distribu-
tor shaft before driving out the roll pin.
7 The igniter (control unit) can be checked as follows. Connect jumper
wires from the battery and a 1 Z-volt test light to the igniter terminals (see
illustration).
8 Connect an ohmmeter or small dry cell to the remaining terminals as
shown (this will apply a small signal to the igniter).
9 Ifthetestlightglowswhenthesignalisappliedand~oesoutwhenitis
removed, the igniter is apparently working properly. If not, it is defective.
Note:
Even if the testresults are as specified, the igniter maybe defective.
10 When reassembling the distributor, be sure to align the mating marks
on the gear and shaft before installing the roll pin.
11 The air gap between the signal rotor and pick-up coil must be adjusted
after the distributor is reassembled (see Section 11).
f 984 through f 989 Mitsubishi type
12 The pick-up coil can be checked as follows. Disconnect the electrical
connectors from the coil. Connect an ohmmeter to the electrica termin&
and check the resistance.
13 The resistance should be within the range listed in this Chapter’s
Specifications. If the test results are not within this range, replace the pick-
up coil with a new unit.
14 To remove the pick-up coil, follow the procedure in Steps 3 through 6,
but note that later model distributors differ in certain details. Refer to illus-
tration 9.7c if problems are encountered.
15 Theairgapbetween thesignal rotorandpfck-upcoil mustbeadjusfed
after the distributor is reassembled (see Section 11).
1386 through 1989 Nippondenso type (AWL engine)
Refer to illustration 10.18
16 Follow the procedure in Step 2 and remove the igniter (control unit),
but note that later model distributors differ in certain details. Refer to illus-
tration 9.7d if problems are encountered.
17 On most models, the distributor cap and rotor must be removed be-
fore the igniter can be removed.
18 The igniter (control unit) can be checked as follows: Connect an ohm-
meter to the electrical terminals
(see illustration)
and check the resis-
tance.
19 The resistance should be 140 to 180 ohms.
20 Reinstall the distributor cap and rotor.
21 The air gap between the srgnal rotor and pick-up coil must be adjusted
after the distributor is reassembled (see Section 11).
To Next Page
Loading...
