1998 NISSAN PICK-UP engine

SELF-DIAGNOSTIC RESULTS ITEM CHART
Detected items (Screen terms) Description Reference page
IMMU IMMU is malfunctioning. EL-207
CSOLUIMMU received the signal from CSOLU that CSOLU is malfunc-
tioning.EL-207
CHAIN OF CSOLU-IMM Communication impossible between CSOLU and IMMU. EL-208
KEY ID [DIFFERENCE]IMMU can receive the key ID signal but the result of ID verifica-
tion between key ID and IMMU is NG.EL-210
KEY ID [NO INPUT]IMMU cannot receive the key ID signal. In the case of multiple
malfunctions, just this item can be displayed prior to the other
malfunctioning items.EL-211
ID DSCORD, IMM-CSLUThe result of ID verification between IMMU and CSOLU is NG.
System initialisation is required.EL-213
NOTE:
When CONSULT shows ``IMPOSSIBLE TO PROCEED'' displayed on its screen, it means that CONSULT
fails to access to the NATS. In this case, perform diagnostic procedure 7, EL-214.
NATS (Nissan Anti-Theft System)/Diesel engine
CONSULT (Cont'd)
EL-204

Trouble Diagnoses
WORK FLOW
CHECK IN
Listen to customer complaints or request. (Get symptoms.)
TROUBLEKEY SERVICE REQUEST (Additional key ID registration)
.Verify the lighting of security ind. with ignition switch in ``ON''
position.IMMU INITIALISATION
[Refer to CONSULT operation
manual NATS V2.0 (Diesel).]
cUsing the CONSULT program card for NATS check the ``SELF-
DIAG RESULTS'' with CONSULT.
Information about self-diagnostic results referring to NATS is
displayed on CONSULT.
Turn ignition switch ``OFF''.
Repair NATS.
(If necessary, carry out ``SELF-FUNCTION CHECK'' or ``INI-
TIALISATION'' with CONSULT.)
Turn ignition switch ``ON''.
Erase the NATS ``SELF-DIAG RESULTS'' by using CONSULT.
(Touch ``ERASE''.)
Turn ignition switch ``OFF''.
Wait approx. 5 seconds and turn ignition switch ``ON''.
NGVerify no lighting of security ind.
OK
CHECK OUT
.
.
.
.
.
.
.
.
.
.
.
.
NATS (Nissan Anti-Theft System)/Diesel engine
EL-205

SYMPTOM CHART
SymptomDisplayed ``SELF-DIAG
RESULTS'' on CONSULT
screenDiagnostic Procedure
(Reference page)System
(Malfunctioning part or mode)
lNo lighting/lighting of secu-
rity indicator with ignition
switch in ``ON'' position
lHard to start engineIMMU PROCEDURE 1
(EL-207)IMMU
lLighting of security indica-
tor with ignition switch in
``ON'' position
lHard to start engineCSOLU PROCEDURE 2
(EL-207)CSOLU
CHAIN OF CSOLU-IMM PROCEDURE 3
(EL-208)Open circuit in ignition line of CSOLU
Open circuit in ground line of CSOLU
Open or short circuit in communication line
between IMMU and CSOLU
IMMU
CSOLU
KEY ID
[NO INPUT]PROCEDURE 5
(EL-211)Open or short circuit in communication line
between ANT/AMP and IMMU
Open circuit in power source line of ANT/
AMP circuit
Open circuit in ground of ANT/AMP circuit
Malfunction of key ID chip
IMMU
Antenna amp.
ID DISCORD, IMM-CSLU PROCEDURE 6
(EL-213)System initialisation has not yet been com-
pleted.
CSOLU
IMMU
lHard to start engine
lLighting of security indica-
tor with ignition switch in
``ON'' position (See note)KEY ID
[DIFFERENCE]PROCEDURE 4
(EL-210)Unregistered key
lHard to start engine
lNo lighting of security indi-
cator.
lImpossible to proceed with
the CONSULT diagnosesAfter touch ``START'',
CONSULT screen dis-
plays ``IMPOSSIBLE TO
PROCEED''.PROCEDURE 7
(EL-214)Open or short circuit in communication line
between IMMU and CONSULT data link
connector
Open or short circuit in antenna amp. power
source circuit between IMMU and antenna
amp.
Open circuit in power source line of IMMU
circuit
Open circuit in ignition line of IMMU circuit
Open circuit in ground line of IMMU circuit
IMMU
lNATS security ind. does
not blink with ignition
switch in ``OFF'' or ``ACC''.
lEngine starts properly.Ð PROCEDURE 8
(EL-216)NATS security ind.
Open circuit between fuse and NATS IMMU
Continuation of initialisation mode
NOTE: NATS security ind. may light off for 1 minute after ignition switch is turned to ``OFF'' position.
NATS (Nissan Anti-Theft System)/Diesel engine
Trouble Diagnoses (Cont'd)
EL-206

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