1998 NISSAN PICK-UP engine

DIAGNOSTIC PROCEDURE 7
Self-diagnostic results:
``IMPOSSIBLE TO PROCEED'' displayed on
CONSULT screen
CHECK CONSULT SCREEN.
1. Touch ``V.2.0 (DIESEL)'' on
``SELECT NATS SYSTEM''
screen.
2. Confirm ``IMPOSSIBLE TO
PROCEED'' displayed on CON-
SULT screen.
CHECK OPEN CIRCUIT BETWEEN
IMMU AND CONSULT.
1. Disconnect IMMU connector and CON-
SULT from data link connector.
2. Check continuity between the following
IMMU terminals and data link connec-
tor terminals.
OK
cNG
Repair harness.
CHECK SHORT CIRCUIT BETWEEN
IMMU AND CONSULT.
1. Disconnect IMMU connector and CON-
SULT from data link connector.
2. Check continuity between IMMU con-
nector terminal
V6,V7and ground.
Continuity should not exist.
3. Turn ignition switch to ON.
4. Check voltage between IMMU terminal
V6,V7and ground.
No voltage should exist.
OK
cNG
Repair harness.
Note:
If the circuit is short to
power circuit, IMMU may
be damaged. After
repairing, perform self-
diagnosis with CONSULT
again.
CHECK NATS ANTENNA AMP. POWER
SOURCE CIRCUIT.
1. Disconnect NATS antenna amp. con-
nector.
2. Turn ignition switch ``ON''.
3. Check voltage between antenna amp.
terminal
V1and ground.
Voltage: More than 4.7V
OKNG
(0V)
c
NATS antenna amp. +5V
line is short-circuited with
ground line.
Repair harness or connec-
tors.
VA
IMMU
terminalData link
connector
terminalContinuity
V7V13Yes
V6V14Yes
SEL719U
SEL470VA
SEL471VA
SEL636V
.
.
.
.
NATS (Nissan Anti-Theft System)/Diesel engine
Trouble Diagnoses (Cont'd)
EL-214

VA
CHECK POWER SUPPLY CIRCUIT FOR
IMMU.
Check voltage between terminal
V4of
IMMU and ground with CONSULT or
tester.
Voltage: Battery voltage
OK
cNG
Check the following.
l10A fuse (No.34,
located in the fusible
link and fuse box)
lHarness for open or
short between fuse and
IMMU connector
CHECK IGN SW. ON SIGNAL.
Check voltage between terminal
V3of
IMMU and ground with CONSULT or
tester.
Voltage: Battery voltage
OK
cNG
Check the following.
l10A fuse (No.23,
located in the fuse
block)
lHarness for open or
short between fuse and
IMMU connector
CHECK GROUND CIRCUIT FOR IMMU.
Check harness continuity between IMMU
terminal
V9and ground.
Continuity should exist.
OK
cNG
Repair harness.
lIMMU is malfunctioning.
1. Replace IMMU.
2. Perform system initialisation with CON-
SULT.
For the operation of system
initialisation, refer to ``CONSULT opera-
tion manual NATS V2.0 (Diesel)''.
SEL867UE
SEL868UE
SEL453VA
.
.
.
.
NATS (Nissan Anti-Theft System)/Diesel engine
Trouble Diagnoses (Cont'd)
EL-215

DIAGNOSTIC PROCEDURE 8
``NATS SECURITY IND. DOES NOT LIGHT UP''
CHECK INDICATOR POWER SUPPLY
CIRCUIT.
Check voltage between security indicator
terminal
V1and ground.
Battery voltage should exist.
OK
cNG
Check the following.
l7.5A fuse (No.6,
located in the fuse block)
lHarness for open or
short between fuse and
security indicator
Check security indicator.
OK
cNG
Replace security indicator.
PERFORM INITIALISATION.
Perform IMMU initialisation with CON-
SULT.
For the initialisation procedure, refer to
``CONSULT operation manual NATS V2.0
(Diesel)''.
Does security indicator operate after
initialisation has completed?
Yes
cNo
Check harness for open or
short between NATS
IMMU and security indica-
tor.
END
SEL638V.
.
.
NATS (Nissan Anti-Theft System)/Diesel engine
Trouble Diagnoses (Cont'd)
EL-216

Engine Compartment
HEL391A
LOCATION OF ELECTRICAL UNITS
EL-217

How to Read Harness Layout
Example:
G2E1B/6: ASCD ACTUATOR
Connector color / Cavity
Connector number
Grid reference
The following Harness Layouts use a map style grid to help locate connectors on the drawings:
lMain Harness (Instrument Panel, Engine Compartment)
lEngine Room Harness
lEngine Control Harness
To use the grid reference
1) Find the desired connector number on the connector list.
2) Find the grid reference.
3) On the drawing, find the crossing of the grid reference letter column and number row.
4) Find the connector number in the crossing zone.
5) Follow the line (if used) to the connector.
CONNECTOR SYMBOL
Main symbols of connector (in Harness Layout) are indicated in the below.
Connector typeWater proof type Standard type
Male Female Male Female
lCavity: Less than 4
lRelay connector
lCavity: From 5 to 8
lCavity: More than 9
lGround terminal etc.
Ð
HARNESS LAYOUT
EL-221

ENGINE COMPARTMENT Ð KA24E ENGINE (LHD models)
HEL854
HARNESS LAYOUT
Main Harness (Cont'd)
EL-228

ENGINE COMPARTMENT Ð EXCEPT KA24E ENGINE (LHD models)
HEL402A
HARNESS LAYOUT
Main Harness (Cont'd)
EL-230

Engine Room Harness
LHD MODELS Ð GASOLINE ENGINE
HEL404A
HARNESS LAYOUT
EL-232