2001 NISSAN PICK-UP Repair Manual

SYMPTOM MATRIX CHART 1
(Self-diagnosis related item)
SYMPTOMDisplayed ªSELF-DIAG
RESULTSº on CONSULT-II
screen.DIAGNOSTIC PROCE-
DURE
(Reference page)SYSTEM
(Malfunctioning
part or mode)REFERENCE PART NO.
OF ILLUSTRATION ON
DIAGNOSTIC SYSTEM
DIAGRAM
+Security indicator lighting
up*
+Engine does not startECM INT CIRC-IMMUPROCEDURE 1
(EL-3152)ECM B
CHAIN OF ECM-IMMUPROCEDURE 2
(EL-3153)In rare case, ªCHAIN OF
ECM-IMMU might be stored
during key registration
procedure, even if the sys-
tem is not malfunctioning.Ð
Open circuit in battery volt-
age line of IMMU circuitC1
Open circuit in ignition line
of IMMU circuitC2
Open circuit in ground line
of IMMU circuitC3
Open circuit in communica-
tion line between IMMU and
ECMC4
Short circuit between IMMU
and ECM communication
line and battery voltage lineC4
Short circuit between IMMU
and ECM communication
line and ground lineC4
ECM B
IMMU A
DIFFERENCE OF KEYPROCEDURE 3
(EL-3155)Unregistered key D
IMMU A
CHAIN OF IMMU-KEYPROCEDURE 4
(EL-3156)Malfunction of key ID chip E
IMMU A
Open circuit in ground line
of dongle unit circuitC6
Open or short circuit in
communication line between
IMMU and dongle unitC5
Dongle unit G
+Security indicator lighting
up*
+Engine hard to startID DISCORD, IMM-ECMPROCEDURE 5
(EL-3157)System initialization has not
yet been completed.F
ECM B
LOCK MODEPROCEDURE 6
(EL-3158)LOCK MODE D
*: When NATS detects trouble, the security indicator lights up while ignition key is in the ªONº position.
*: When the vehicle is equipped with dongle unit, the security indicator blinks 6 times just after ignition switch is turned to ON. Then
the security indicator will light up while ignition key is in the ON position.
NATS (Nissan Anti-Theft System)
Trouble Diagnoses (Cont'd)
EL-3150

SYMPTOM MATRIX CHART 2
(Non self-diagnosis related item)
SYMPTOMDIAGNOSTIC PROCEDURE
(Reference page)SYSTEM
(Malfunctioning part or mode)REFERENCE PART NO. OF
ILLUSTRATION ON DIAG-
NOSTIC SYSTEM DIAGRAM
Security ind. does not light up.PROCEDURE 7
(EL-3159)Security ind. Ð
Open circuit between Fuse and NATS IMMU Ð
Continuation of initialization mode Ð
NATS IMMU A
Security ind. does not blink
just after initialization even if
the vehicle is equipped with
dongle unit.
PROCEDURE 8
(EL-3160)NATS might be initialized without connecting
dongle unit properly.Ð
Open circuit in ground line of dongle unit circuit C6
Security ind. does not blink
just after ignition switch is
turned to ON when some mal-
function related to NATS is
detected even if the vehicle is
equipped with dongle unit.Open or short circuit in communication line
between IMMU and dongle unitC5
Dongle unit G
DIAGNOSTIC SYSTEM DIAGRAM
SEL028X
NATS (Nissan Anti-Theft System)
Trouble Diagnoses (Cont'd)
EL-3151

DIAGNOSTIC PROCEDURE 1
Self-diagnostic results:
ªECM INT CIRC-IMMUº displayed on CONSULT-II screen
Confirm SELF-DIAGNOSTIC RESULTS ªECM INT CIRC-IMMUº dis-
played on CONSULT-II screen.
Ref. part No. B.
Replace ECM.
Perform initialization with CONSULT-II.
For the operation of initialization, refer to ªCONSULT-II operation
manual NATSº.
SEL152X.
.
NATS (Nissan Anti-Theft System)
Trouble Diagnoses (Cont'd)
EL-3152

DIAGNOSTIC PROCEDURE 2
Self-diagnostic results:
ªCHAIN OF ECM-IMMUº displayed on CONSULT-II screen
Confirm SELF-DIAGNOSTIC
RESULTS ªCHAIN OF ECM-
IMMUº* displayed on CONSULT-II
screen.
OK*: In rare case, ªCHAIN OF
ECM-IMMUº might be
stored during key registra-
tion procedure, even if the
system is not malfunction-
ing.
CHECK POWER SUPPLY CIRCUIT FOR
IMMU.
Check voltage between IMMU connector
M68terminalV8(W/L) and ground.
Voltage: Battery voltage
OK
cNG
Check the following:
+20A fuse (No.
36,
located in the fuse and
fusible link box) (Diesel
engine models)
+10A fuse (No.
33,
located in the fuse and
fusible link box) (Gaso-
line engine models)
+Harness for open or
short between fuse and
IMMU connector
Ref. part No. C1
CHECK IGN SW. ON SIGNAL.
Check voltage between IMMU connector
M68terminalV7(W/R) and ground while
ignition switch is in the ªONº position.
Voltage: Battery voltage
OK
cNG
Check the following:
+10A fuse [No.
21,
located in the fuse
block (J/B)]
+Harness for open or
short between fuse and
IMMU connector
Ref. part No. C2
CHECK GROUND CIRCUIT FOR IMMU.
Check harness continuity between IMMU
connector
M68terminalV4(B) and
ground.
Continuity should exist.
OK
cNG
Repair harness.
Ref. part No. C3
CHECK COMMUNICATION ON OPEN
CIRCUIT.
Check harness continuity between the
following ECM terminal and IMMU termi-
nal.
ECM connector
M32terminalV65
(G/OR) or IMMU connectorM68ter-
minal
V1(G/OR)
Continuity should exist.
OK
cNG
Repair harness.
Ref. part No. C4
VA
SEL153X
SEL154XC
SEL155XC
SEL156XB
SEL610Y
.
.
.
.
.
NATS (Nissan Anti-Theft System)
Trouble Diagnoses (Cont'd)
EL-3153

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