1998 NISSAN PICK-UP Repair Manual

DIAGNOSTIC PROCEDURE 1
Self-diagnostic results:
``IMMU'' displayed on CONSULT screen
Confirm SELF-DIAGNOSTIC RESULTS ``IMMU'' displayed on
CONSULT screen.
lIMMU is malfunctioning.
1. Replace IMMU.
2. Perform system initialisation with CONSULT.
For the initialisation procedure, refer to ``CONSULT operation manual
NATS V2.0 (Diesel)''.
DIAGNOSTIC PROCEDURE 2
Self-diagnostic results:
``CSOLU'' displayed on CONSULT screen
Confirm SELF-DIAGNOSTIC RESULTS ``CSOLU'' displayed on
CONSULT screen.
lCSOLU is malfunctioning.
1. Replace CSOLU. (See NOTE.)
2. Perform system initialisation with CONSULT.
For the initialisation procedure, refer to ``CONSULT operation manual
NATS V2.0 (Diesel)''.
NOTE:
When replacing CSOLU, it cannot be removed from injection pump assembly
because of its anti-theft construction. The injection pump assembly should be
removed complete with CSOLU, and a Link Service rebuilt unit (complete with
CSOLU) installed in its place.
SEL678U
SEL679U
.
.
NATS (Nissan Anti-Theft System)/Diesel engine
Trouble Diagnoses (Cont'd)
EL-207

DIAGNOSTIC PROCEDURE 3
Self-diagnostic results:
``CHAIN OF CSOLU-IMM'' displayed on CONSULT
screen
Confirm SELF-DIAGNOSTIC
RESULTS ``CHAIN OF CSOLU-
IMM'' displayed on CONSULT
screen.
OK
CHECK CSOLU POWER SOURCE CIR-
CUIT.
Check voltage between CSOLU terminal
V2and ground.
Battery voltage should exist.
OK
cNG
Check the following.
l10A fuse (No.23,
located in the fuse
block)
lHarness for open or
short between fuse and
CSOLU connector
CHECK GROUND CIRCUIT FOR
CSOLU.
Check harness continuity between
CSOLU terminal
V3and ground.
Continuity should exist.
OK
cNG
Repair harness.
CHECK COMMUNICATION LINE OPEN
CIRCUIT.
1. Disconnect CSOLU connector and
IMMU connector.
2. Check harness continuity between
CSOLU terminal
V1and IMMU termi-
nal
V5.
Continuity should exist.
OK
cNG
Repair harness.
VA
SEL683U
SEL467VA
SEL468VA
SEL469VA
.
.
.
.
NATS (Nissan Anti-Theft System)/Diesel engine
Trouble Diagnoses (Cont'd)
EL-208

VA
CHECK COMMUNICATION LINE
SHORT CIRCUIT.
1. Disconnect CSOLU connector and
IMMU connector.
2. Check continuity between IMMU termi-
nal
V5and ground.
Continuity should not exist.
3. Turn ignition switch to ON.
4. Check voltage between IMMU terminal
V5and ground.
No voltage should exist.
OK
cNG
Repair harness.
SELF-FUNCTION CHECK
1. Connect IMMU connector and
disconnect CSOLU connector.
2. Turn ignition switch ``ON''.
3. Touch ``SELF-FUNCTION
CHECK'' on CONSULT
``SELECT DIAG MODE''
screen.
Touch ``START''. IMMU will then
check its communication interface
by itself.
OK
cNGlIMMU is malfunctioning.
1. Replace IMMU.
2. Perform system initiali-
sation with CONSULT.
For the initialisation
procedure, refer to
``CONSULT operation
manual NATS V2.0
(Diesel)''.
lCSOLU is malfunctioning.
1. Replace CSOLU.
2. Perform system initialisation with
CONSULT. For the initialisation
procedure, refer to ``CONSULT
operation manual NATS V2.0 (Die-
sel)''.
SEL455VA
SEL340U
SEL690U
SEL691U
.
.
.
.
NATS (Nissan Anti-Theft System)/Diesel engine
Trouble Diagnoses (Cont'd)
EL-209

DIAGNOSTIC PROCEDURE 4
Self-diagnostic results:
``KEY ID [DIFFERENCE]'' displayed on CONSULT
screen
Confirm SELF-DIAGNOSTIC RESULTS
``KEY ID [DIFFERENCE]'' is displayed on
CONSULT screen.
1. Turn the ignition switch to OFF posi-
tion and wait 1 minute.
(After 1 minute, security indicator will
blink.)
2. Turn the ignition key switch to ON
position with a registered key.
(Do not start engine.) Wait 5 seconds.
3. Return the key to the OFF position.
4. Repeat steps 2 and 3 twice (total of
three cycles).
5. Start the engine.
Can the engine start?
No
cYes
System is OK.
PERFORM IMMU INITIALISATION.
Perform IMMU initialisation with CON-
SULT.
For the initialisation procedure, refer to
``CONSULT operation manual NATS V2.0
(Diesel)''.
Can the system be initialised?
Note: If the initialisation is incompleted or
failed, CONSULT shows
mes-
sage on the screen.
No
cYes
System is OK.
Go to DIAGNOSTIC PROCEDURE 5,
EL-211 to check ``KEY ID [NO INPUT]''.
SEL692U
SEL693U
SEL694U
.
.
.
NATS (Nissan Anti-Theft System)/Diesel engine
Trouble Diagnoses (Cont'd)
EL-210

DIAGNOSTIC PROCEDURE 5
Self-diagnostic results:
``KEY ID [NO INPUT]'' displayed on CONSULT screen
Confirm SELF-DIAGNOSTIC
RESULTS ``KEY ID [NO INPUT]''
displayed on CONSULT screen.
OK
CHECK NATS IGNITION KEY ID CHIP.
Start engine with another registered
NATS ignition key.
Can the engine start?
NoYes
clIgnition key ID chip is
malfunctioning.
1. Replace the ignition
key.
2. Perform IMMU initialisa-
tion with CONSULT.
For the initialisation
procedure, refer to
``CONSULT operation
manual NATS V2.0
(Diesel)''.
CHECK IMMU FUNCTION 1.
1. Turn ignition switch ``ON''.
2. Check voltage between IMMU terminal
V2and ground.
Note:
Do not remove NATS antenna amp. from
the ignition key cylinder.
OK
cNG
Check harness for open or
short between IMMU and
NATS antenna amp. If
harness is OK, replace
IMMU. After replacing
IMMU, perform system
initialisation with CON-
SULT.
For the initialisation
procedure, refer to ``CON-
SULT operation manual
NATS V2.0 (Diesel)''.
CHECK IMMU FUNCTION 2.
1. Turn ignition switch ``ON''.
2. Check voltage between NATS antenna
amp. terminal
V3and ground.
Voltage:
6 sec. after turning ignition switch
``ON''
Approx. 4.5 - 5.3V
Note:
Do not remove NATS antenna amp. from
the ignition key cylinder.
OK
cNG
CHECK IMMU OUTPUT VOLTAGE.
1. Turn the ignition switch ``ON''.
2. Check voltage between NATS antenna
amp. terminal
V1and ground.
Voltage: More than 4.7V
OK
m
NG
VA
Time (After turning ignition
switch ``ON''.)Voltage [V]
For approx. 0.5 sec. Approx. 2.3 - 5
After 1 sec. 0
SEL695U
SEL634V
SEL635V
SEL636V
.
.
.
.
.
NATS (Nissan Anti-Theft System)/Diesel engine
Trouble Diagnoses (Cont'd)
EL-211

VA
CHECK ANTENNA AMP. GROUND
LINE CIRCUIT.
1. Turn ignition switch ``OFF''.
2. Check continuity between NATS
antenna amp. terminal
V4and ground.
Continuity should exist.
OK
cNG
Check harness for open or
short between NATS
antenna amp. and IMMU.
If harness is OK, replace
IMMU. After replacing
IMMU, perform system
initialisation with CON-
SULT. For the initialisation
procedure, refer to ``CON-
SULT operation manual
NATS V2.0 (Diesel)''.
NATS antenna amp. is malfunctioning.
When replacing the amp. hold on to amp.
body. Take care not to pull on amp. har-
ness.
SEL637V
.
.
NATS (Nissan Anti-Theft System)/Diesel engine
Trouble Diagnoses (Cont'd)
EL-212

DIAGNOSTIC PROCEDURE 6
Self-diagnostic results:
``ID DSCORD, IMM-CSLU'' displayed on CONSULT
screen
Confirm SELF-DIAGNOS-
TIC RESULTS ``ID
DSCORD, IMM-CSLU*''
displayed on CONSULT
screen.* ``ID DSCORD, IMM-CSLU'':
Registered ID of IMMU is in discord
with that of CSOLU.
Perform system initialisa-
tion with CONSULT.
Re-register all NATS igni-
tion key IDs.
For the operation of sys-
tem initialisation, refer to
``CONSULT operation
manual NATS V2.0 (Die-
sel)''.
Initialisation
completedInitialisation
incompleted
cTurn the ignition
key and CONSULT
power switch
``OFF''. Then turn
the ignition key
``ON''.
Initialisation
incompleted or
failed with CON-
SULT
cConfirm system ini-
tialisation result
``INITIALISATION
STOPPED OR
FAILED'' displayed
on CONSULT
screen.
Start engine.
OK
CHECK SELF-DIAG
RESULTS.
1. Turn the ignition switch
``OFF'' and ``ON''.
2. Touch ``SELF-DIAG
RESULTS'' on CONSULT
``SELECT DIAG MODE''
screen.
END
``IMMU'' is displayed. ``CSOLU'' is displayed.
..
If ``IMMU'' is displayed on CON-
SULT screen, IMMU is malfunc-
tioning.If ``CSOLU'' is displayed on CON-
SULT screen, CSOLU is malfunc-
tioning.
Replace IMMU.Replace CSOLU.
..
Perform system initialisation
with CONSULT.
For the operation of system
initialisation, refer to ``CON-
SULT operation manual NATS
V2.0 (Diesel)''.
SEL696U
SEL698U
SEL697U
SEL678U
SEL679U
.
..
.
..
.
NATS (Nissan Anti-Theft System)/Diesel engine
Trouble Diagnoses (Cont'd)
EL-213

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