Nissan PULSAR N13 Series / ASTRA LD Series. Instruction — part 26

Fuel and Engine Management

105

DISTRIBUTOR

To Remove and Install

(1) Disconnect the negative battery terminal.
(2) Disconnect the distributor wiring connec-

tors.

(3) Disconnect the high tension leads from the

spark plugs.

(4) Remove the distributor cap retaining screws

and remove the cap and high tension leads from the
vehicle.

(5) Turn the engine in the normal direction of

rotation until the mark on the crankshaft pulley aligns
with the timing pointer and the rotor is pointing
towards the No. 1 spark plug lead terminal on the
distributor cap.

(6) Mark the distributor body to camshaft hous-

ing relationship to aid in setting the ignition timing on
installation.

(7) Remove the distributor retaining nuts and

withdraw the distributor from the camshaft housing.

Installation is a reversal of the removal procedure

with attention to the following points:

(1) Ensure that the engine has not been rotated

while the distributor has been removed. If the engine
has been rotated, align the timing marks and ensure
that No. 1 piston is on the compression stroke.

(2) Check and renew the distributor base O ring

if the sealing quality is suspect.

(3) Install the distributor to the camshaft

hous-
ing, aligning the coupling with the slot in the camshaft
and ensuring that the rotor does not move in relation
to the distributor body. Align the marks made on
removal.

(4) Install and securely tighten the distributor

retaining nuts.

(5) Install the distributor cap and tighten

the
retaining screws.

(6) Connect the distributor wiring connector.
(7) Connect the negative battery terminal and

check the ignition timing as previously described in
this section.

To Dismantle and Assemble

With the distributor removed from the engine and

the distributor cap removed, dismantle the distributor
as follows:

(1) Disconnect the pickup coil wiring connector

from the control module.

(2) Measure the resistance between the terminals

on the pickup coil wiring connector and the distribu-
tor body. The resistance should be infinity.

(3) Measure the resistance between the terminals

View of the distributor removed from the engine show-

ing the pickup coil connector.

0 RING

RETAINING SPRING

Dismantled view of the distributor.

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Fuel and Engine Management

on the pickup coil wiring connector. The resistance
should be 500-1 500 ohms.

If the resistance is not as specified in either of the

above tests, renew the pickup coil.

(4) Remove the retaining spring from the dis-

tributor drive coupling.

(5) Using a pin punch, remove the drive pin

from the shaft.

(6) Remove the drive coupling, washer, tang

washer and thrust spring from the shaft.

(7) Remove the rotor and shaft from the distrib-

utor housing.

(8) Remove the retainer from the distributor

housing and withdraw the pickup coil.

(9) Remove the retaining screws and remove the

control module from the distributor body.

(10) Carefully lever the stationary pole from the

housing using a suitable screwdriver.

Assembly is a reversal of the dismantling proce-

dure with attention to the following points:

(1) Ensure that the mating surfaces of the dis-

tributor housing and the control module are clean.

(2) Apply a silicone heat sink compound to the

surfaces between the control module and the distrib-
utor housing.

IGNITION COIL

To Test

(1) Disconnect the grey wiring connector and the

black wiring connector from the ignition coil in that
order.

(2) Measure the resistance between coil terminal

I and the coil body. There should be a high resistance.

(3) Measure the resistance between coil termi-

nals 2 and 4. There should be a low resistance.

(4) Measure the resistance between coil terminal

3 and the high tension terminal. The resistance should
be other than infinity.

If any of the tests indicate a fault, renew the

ignition coil.

To Remove and Install

(1) Disconnect the negative battery terminal.
(2) Disconnect the grey wiring connector and the

black wiring connector from the ignition coil in that
order. Disconnect the high tension lead.

(3) Remove the coil mounting bracket retaining

bolts and remove the coil and bracket from the
engine.

Installation is a reversal of the removal procedure.

ELECTRONIC SPARK TIMING
To Test - Code 42

(1) Erase the self diagnosis code memory as

previously described.

(2) Start and run the engine at idle speed for 60

seconds or until the ECM warning lamp lights.

(3) Stop the engine, switch the ignition On and

connect a jumper lead between terminals A and B on
the diagnostic link connector. Note any fault codes
displayed.

If code 42 is displayed, proceed to operation (4).

If code 42 is not displayed, but was displayed

when the self diagnosis test procedure was originally
performed, an intermittent fault is indicated. Proceed
as follows:

(a) Check for faulty wiring connections. Check

that all wiring connectors are clean and secure.

(b) Check that all earth wires are secure.

(4) With the ignition switched Off, disconnect

the control unit wiring connectors.

(5) With the ignition switched On, measure the

resistance between the control unit wiring connector
terminal D4 and a good earthing point. The resistance
should be less than 500 ohms.

If the ohmmeter reading is as specified, check the

wiring harness between the distributor 4 pin wiring
connector terminal D and the control unit wiring
connector terminal D4 for continuity. Repair or
renew the wiring harness as necessary. Also ensure
that the distributor 4 pin wiring connector is making
good contact when connected to the distributor.

If no fault can be found, renew the ignition

control module.

If the resistance is as specified proceed as follows.

(6) With the lead of a test lamp connected to the

positive battery terminal, backprobe the control unit
wiring connector terminal D5.

If the test lamp does not light, proceed to

operation (7).

If the test lamp lights, disconnect the 4 pin wiring

connector from the distributor. If the test lamp
remains illuminated check the wiring harness between
the distributor 4 pin wiring connector terminal B and
the control unit wiring connector terminal D5 for
shorts to earth. Repair or renew the wiring harness as
necessary. If the test lamp extinguishes, renew the
ignition system control module.

(7) Connect an ohmmeter between the control

Installed view of the ignition coil showing the coil

terminal identification.

Fuel and Engine Management

107

unit wiring connector terminal D4 and a good earth-
ing point.

(8) With the lead of a test lamp connected to the

positive battery terminal, backprobe the control unit
wiring connector terminal D5. As the test lamp probe
touches the terminal, the ohmmeter reading should
change from less than 500 ohms to over 5 000 ohms.

If the ohmmeter reading is not as specified,

proceed to operation (9).

If the ohmmeter reading is as specified, switch the

ignition Off and install the control unit wiring connec-
tors. Run the engine for 60 seconds or until the ECM
warning lamp lights and check for fault codes.

If code 42 is displayed renew the control unit.

If code 42 is not displayed, check the wiring

harness for continuity or shorts between the control
unit wiring connector terminals D4 and D5 and the
distributor 4 pin wiring connector terminals D and B.

(9) Disconnect the 4 pin wiring connector from

the distributor.

(10) Check for continuity between the control

unit wiring connector terminal D4 and a good earth-
ing point. There should be no continuity.

If the continuity is not as specified, check the

wiring harness between the distributor 4 pin wiring
connector terminal D and the control unit wiring
connector terminal D4 for shorts to earth. Repair or
renew the wiring harness as necessary.

If the continuity is as specified, check the wiring

harness between the distributor 4 pin wiring connec-
tor terminal B and the control unit wiring connector
terminal D5 for continuity. Repair or renew the
wiring harness as necessary. If no fault is found, renew
the ignition system control module.

CONTROL UNIT

To Test Input Circuits — Code 55

(1) Switch the ignition On with the engine

stopped and note the ECM warning lamp.

(2) If a steady light is showing, proceed to

operation (3).

If code 55 is displayed, proceed as follows:

(a) Switch the ignition Off and disconnect the

wiring connector from the control unit.

(b) Switch the ignition On and measure the

voltage at the wiring connector on terminals C10,
C I 1 , C12, C13 and A9. Disregard terminal C12 on
1.6 liter engines.

(c) If there is voltage at any of the terminals

tested above, a faulty wiring harness is indicated.
Repair the short circuit to voltage and return to
operation (1).

(d) If there is no voltage at any of the terminals

tested, a faulty control unit is indicated. Renew the
control unit and return to operation (1).

(3) Connect a jumper lead between terminals A

and B on the diagnostic link connector and note if
code 55 is displayed.

If code 55 is displayed, an intermittent fault is

indicated. Switch Off the engine, erase the self diag-
nosis codes and run the engine for 2 minutes. Return
to operation (1) and repeat the test procedures.

If code 55 continues to return, renew the control

unit.

To Remove and Install

(1) Disconnect the negative battery terminal.
(2) Slide the passengers front seat to the rear-

most position and working under the seat, disconnect
the control unit wiring connectors.

(3) Disengage the plastic control unit cover from

the mounting plate and remove the control unit from
the vehicle.

(4) If necessary, remove the screws retaining the

Mem-Cal cover to the control unit.

(5) Release the Mem-Cal unit retaining clips,

grasp the Mem-Cal unit at each end and remove it
from the control unit.

Installation is a reversal of the removal procedure

with attention to the following points:

(1) When installing the Mem-Cal unit, align the

notches in the Mem-Cal with those in the control unit
and push on each end of the Mem-Cal unit. Do not
push on the middle section of the Mem-Cal unit.

View of the control unit with the Mem-Cal unit re-

moved.

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Fuel and Engine Management

Installed view of the control unit with the passengers

seat removed.

(2) Secure the Mem-Cal unit retaining clips.

Ensure that the clips locate into the Mem-Cal unit.

(3) When installing a new control unit, transfer

the identification and bar code label to the new
control unit.

(4) Ensure that the control unit wiring connec-

tors are securely installed to the control unit.

(5) Activate the self diagnosis codes. If code 51

is displayed or the Check Engine warning lamp is
constantly illuminated, the Mem-Cal unit is not fully
installed. If the Mem-Cal unit is installed correctly, a
fault in the Mem-Cal unit is indicated. Renew the
Mem-Cal unit as previously described.

To Check Power Supply and Earth Circuit

(1) Disconnect the control unit wiring connec-

tors and check for voltage at terminals B1 and C16.

If there is no voltage check the fusible link which

is located third from the front in the fusible link
connecting block. If the fusible link is serviceable,
repair the open circuit in the wiring harness.

(2) Check for continuity to earth on terminals

A12, D1, D6 and also D3 and D10 on 1.8 liter
engines.

If there is no continuity check the earth connec-

tions at the right hand rear cylinder head bolts. If the
connections are clean and secure, repair the open
circuit in the wiring harness.

MEM-CAL UNIT
To Test - Code 51

If code 51 is displayed during the self diagnosis

test procedure, proceed as follows:

(1) Check that the Mem-Cal unit is fully inserted

in the control unit.

(2) Erase the fault code memory and retest for

fault codes.

(3) If code 51 is still displayed, renew the

Mem-Cal unit.

(4) Erase the fault code memory and retest for

fault codes.

(5) If code 51 is still displayed, renew the control

unit.

To Remove and Install

The Mem-Cal unit is incorporated within the

control unit. Refer to the previous heading for the
removal and installation procedure.

FUEL PUMP AND EGI RELAYS

To Remove and Install

(1) Disconnect the negative battery terminals.
(2) Remove the fuse panel cover which is lo-

cated adjacent to the steering column under the
instrument cluster.

(3) Remove the spare fuse holder from the fuse

panel and remove the relevant relay from the connec-
tor.

Installation is a reversal of the removal procedure.

View showing the location of the EGI and fuel pump

relays.

To Test Relays

NOTE: When testing the fuel pump relay
circuit ensure that the EGI relay is service-
able and installed to the relay connector

(1) Remove the relevant relay as previously

described.

(2) Using an ohmmeter, check for continuity

between terminals 1 and 2, and 3 and 5.

Continuity should exist between terminals 1 and 2

but should not exist between terminals 3 and 5.

(3) Using suitable jumper leads, apply 12 volts

to terminal 1 and connect terminal 2 to a good earth
point.

(4) Connect the ohmmeter between terminals 3

and 5. Continuity should exist. If continuity does not
exist, renew the relay.