2001 NISSAN PICK-UP Repair Manual

VA
CHECK COMMUNICATION LINE BAT-
TERY SHORT CIRCUIT.
1. Disconnect ECM connector and IMMU
connector.
2. Turn ignition switch to ON.
3. Check voltage between ECM connec-
tor
M32terminalV65(G/OR) or IMMU
connectorM68terminalV1(G/OR)
and ground.
No voltage should exist.
OK
cNG
Repair harness.
Ref. part No. C4
CHECK COMMUNICATION LINE
GROUND SHORT CIRCUIT.
1. Disconnect ECM connector and IMMU
connector.
2. Turn ignition switch OFF.
3. Check continuity between ECM con-
nector
M32terminalV65(G/OR) or
IMMU connectorM68terminalV1
(G/OR) and ground.
Continuity should not exist.
OK
cNG
Repair harness.
Ref. part No. C4
SIGNAL FROM ECM TO IMMU CHECK
1. Check the signal between ECM con-
nector
M32terminalV65(G/OR) and
ground with CONSULT-II or oscillo-
scope when ignition switch is turned
ªONº.
2. Make sure signals which are shown in
the figure below can be detected dur-
ing 750 msec. just after ignition switch
is turned ªONº.
OK
cNG
+ECM is malfunctioning.
1. Replace ECM.Ref.
part No. B
2. Perform initialization
with CONSULT-II.
For the initialization
procedure, refer to
ªCONSULT-II operation
manual NATSº.
+IMMU is malfunctioning.
1. Replace IMMU.Ref. part No. A
2. Perform initialization with CONSULT-
II. For the initialization procedure,
refer to ªCONSULT-II operation
manual NATSº.
SEL611Y
SEL612Y
SEL193X
.
.
.
.
NATS (Nissan Anti-Theft System)
Trouble Diagnoses (Cont'd)
EL-3154

DIAGNOSTIC PROCEDURE 3
Self-diagnostic results:
ªDIFFERENCE OF KEYº displayed on CONSULT-II screen
Confirm SELF-DIAGNOSTIC
RESULTS ªDIFFERENCE OF
KEYº displayed on CONSULT-II
screen.
OK
PERFORM INITIALIZATION.
Perform initialization with CONSULT-II.
Re-register all NATS ignition key IDs.
For the initialization procedure, refer to
ªCONSULT-II operation manual NATSº.
Initialization
completedInitialization
with CON-
SULT-II
incomplete or
failed
c
+IMMU is mal-
functioning.
1. Replace
IMMU.
Ref. part No.
A
2. Perform initial-
ization with
CONSULT-II.
For the initial-
ization
procedure,
refer to ªCON-
SULT-II opera-
tion manual
NATSº.
Start engine.
END.
(The ignition key was unregistered.)
Ref. part No. D
SEL163X
SEL566W
.
.
.
NATS (Nissan Anti-Theft System)
Trouble Diagnoses (Cont'd)
EL-3155

DIAGNOSTIC PROCEDURE 4
Self-diagnostic results:
ªCHAIN OF IMMU-KEYº displayed on CONSULT-II screen
Confirm SELF-DIAGNOSTIC
RESULTS ªCHAIN OF IMMU-
KEYº displayed on CONSULT-II
screen.
OK
CHECK NATS IGNITION KEY ID CHIP.
Start engine with another registered
NATS ignition key.
Does the engine start?
No
cYes
+Ignition key ID chip is
malfunctioning.
1. Replace the ignition
key.
Ref. part No. E
2. Perform initialization
with CONSULT-II.
For the initialization
procedure, refer to
ªCONSULT-II operation
manual NATSº.
Is this vehicle equipped with dongle unit
(RHD models for Europe)?
Yes
cNo
+IMMU is malfunctioning.
1. Replace IMMU.
Ref part No. A
2. Perform initialization
with CONSULT-II.
For the initialization
procedure, refer to
ªCONSULT-II operation
manual NATSº.
CHECK HARNESS CONNECTOR CON-
NECTION.
Check the following harness connector
connection.
M68,N12Does the engine start?
No
cYes
System is OK.
(The malfunction is caused
by improper connector
connection.)
CHECK GROUND CIRCUIT FOR
DONGLE UNIT.
Check continuity between dongle unit ter-
minal
V1(B/W) and ground.
Continuity should exist.
Yes
cNo
Repair harness.
Ref. part No. C6
CHECK INTERFACE CIRCUIT.
1. Check continuity between IMMU con-
nector
M68terminalV2(P) and
dongle unit terminalV7(P) (Open cir-
cuit check)
Continuity should exist.
2. Check continuity between IMMU con-
nector
M68terminalV2(P) and
ground. (Short circuit check)
Continuity should not exist.
Yes
cNo
Repair harness.
Ref. part No. C5
Dongle unit is malfunctioning.
1. Replace dongle unit.Ref. part No. G
2. Perform initialization with CONSULT-II.
For the initialization procedure, refer to
ªCONSULT-II operation manual NATSº.
SEL165X
SEL160XA
SEL161XA
SEL162XA
.
.
.
.
.
.
NATS (Nissan Anti-Theft System)
Trouble Diagnoses (Cont'd)
EL-3156

DIAGNOSTIC PROCEDURE 5
Self-diagnostic results:
ªID DISCORD, IMM-ECMº displayed on CONSULT-II screen
Confirm SELF-DIAGNOSTIC
RESULTS ªID DISCORD, IMM-
ECM*º displayed on CONSULT-II
screen.* ªID DISCORD, IMM-ECMº:
Registered ID of IMMU is
in discord with that of
ECM.
PERFORM INITIALIZATION.
Perform initialization with CONSULT-II.
Re-register all NATS ignition key IDs.
For the initialization procedure, refer to
ªCONSULT-II operation manual NATSº.
Initialization
completedInitialization
with CON-
SULT-II
incomplete or
failed
c
+ECM is mal-
functioning.
1. Replace ECM.
Ref. part No.
B
2. Perform initial-
ization with
CONSULT-II.
For the initial-
ization
procedure,
refer to ªCON-
SULT-II opera-
tion manual
NATSº.
Start engine. (END)
(System initialization was not completed.
Ref. part No. F)
SEL166X
SEL566W
.
.
NATS (Nissan Anti-Theft System)
Trouble Diagnoses (Cont'd)
EL-3157

DIAGNOSTIC PROCEDURE 6
Self-diagnostic results:
ªLOCK MODEº displayed on CONSULT-II screen
Confirm SELF-DIAGNOSTIC RESULTS
ªLOCK MODEº is displayed on CON-
SULT-II screen.
1. Turn the ignition switch to OFF posi-
tion.
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.
Does the engine start?
No
cYes
System is OK.
(Now the system is
escaped from ªLOCK
MODEº.)
CHECK NATS IMMU INSTALLATION.
Refer to ªHow to Replace NATS IMMUº in
EL-3160.
OK
cNG
Reinstall NATS IMMU cor-
rectly.
PERFORM INITIALIZATION.
Perform initialization with CONSULT-II.
For the initialization procedure, refer to
ªCONSULT-II operation manual NATSº.
Can the system be initialized?
Note: If the initialization is incompleted or
failed, CONSULT-II shows
message on the screen.
No
cYes
System is OK.
Go to DIAGNOSTIC PROCEDURE 4,
EL-3156 to check ªCHAIN OF IMMU-
KEYº.
SEL167X
SEL566W
.
.
.
.
NATS (Nissan Anti-Theft System)
Trouble Diagnoses (Cont'd)
EL-3158

DIAGNOSTIC PROCEDURE 7
ªSECURITY IND. DOES NOT LIGHT UPº
Check 10A fuse [No.6, located in the
fuse block (J/B)].
OK
cNG
Replace fuse.
NATS INITIALIZATION
1) Install the 10A fuse.
2) Perform initialization with CON-
SULT-II.
For the operation of
initialization, refer to ªCON-
SULT-II operation manual
NATSº.
Turn ignition switch ªOFFº.
Start engine and turn ignition switch
ªOFFº.
Check the security ind. lighting.
NG
cOK
END
Check voltage between security ind. con-
nectorM55terminalV1(R/G) and
ground.
Voltage: Battery voltage
OK
cNG
Check harness for open or
short between fuse and
security ind.
CHECK INDICATOR LAMP.
OK
cNG
Repair harness.
CHECK NATS IMMU FUNCTION.
1. Connect NATS IMMU connectorM68.
2. Disconnect security ind. connector
M55.
3. Check continuity between NATS IMMU
connector
M68terminalV6(L) and
ground.
Continuity should exist intermit-
tently.
OK
cNG
NATS IMMU is malfunc-
tioning. Replace IMMU.
Perform initializa-
tion with CON-
SULT-II.
For the operation
of initialization,
refer to ªCON-
SULT-II operation
manual NATSº.
Check harness for open or short between
security indicator and NATS IMMU.
SEL931UC
SEL164XA
.
.
.
.
.
.
.
.
.
NATS (Nissan Anti-Theft System)
Trouble Diagnoses (Cont'd)
EL-3159

DIAGNOSTIC PROCEDURE 8
CHECK GROUND CIRCUIT FOR
DONGLE UNIT.
Check continuity between dongle unit
connector
N12terminalV1(B/W) and
ground.
Continuity should exist.
Yes
cNo
Repair harness.
Ref. part No. C6
CHECK INTERFACE CIRCUIT.
1. Check continuity between IMMU con-
nector
M68terminalV2(P) and
dongle unit connectorN12terminal
V7(P).
(Open circuit check)
Continuity should exist.
2. Check continuity between IMMU con-
nector
M68terminalV2(P) and
ground. (Short circuit check)
Continuity should exist.
Yes
cNo
Repair harness.
Ref. part No. C5
Dongle unit is malfunctioning.
1. Replace dongle unit.
Ref. part No. G
2. Perform initialization with CONSULT-II.
For the initialization procedure, refer to
ªCONSULT-II operation manual NATSº.
How to Replace NATS IMMU
NOTE:
+If NATS IMMU is not installed correctly, NATS system
will not operate properly and SELF-DIAG RESULTS on
CONSULT-II screen will show ªLOCK MODEº.
SEL160XA
SEL161XA
SEL162XA
SEL096WD
.
.
NATS (Nissan Anti-Theft System)
Trouble Diagnoses (Cont'd)
EL-3160

Engine Compartment
HEL848B
LOCATION OF ELECTRICAL UNITS
EL-3161