NISSAN PRIMERA 1999 Electronic Repair Manual

Trouble Diagnoses
WORK FLOW
CHECK IN
Listen to customer complaints or request. (Get symptoms)
TROUBLEKEY SERVICE REQUEST (Additional key ID registration)
Verify the security indicator and MI*.INITIALISATION
(Refer to CONSULT-II opera-
tion manual NATS.)
Using the CONSULT-II program card for NATS check the
“SELF-DIAG RESULTS”with CONSULT-II.
Self-diagnostic results referring to NATS, but no informa-
tion about engine self-diagnostic results is displayed on
CONSULT-II.
Turn ignition switch“OFF”.
Repair NATS.
(If necessary, carry out“C/U INITIALIZATION”with CON-
SULT-II.)
Turn ignition switch“ON”.
Erase the NATS“SELF-DIAG RESULTS”by using CON-
SULT-II. (Touch“ERASE”.)
Start the engine.
NGVerify no lighting up of the security indicator.
OK
CHECK OUT
Perform running test with CONSULT-II in engine“SELF-
DIAG RESULTS”mode.
NGVerify“NO DTC IS DETECTED”displayed on the CON-
SULT-II screen.
OK
CHECK OUT
Self-diagnostic results referring to NATS and“DON’T
ERASE BEFORE CHECKING ENG DIAG”are displayed
on CONSULT-II.
(This means that engine trouble data has been detected
in ECM.)
Turn ignition switch“OFF”.
Repair NATS according to self-diagnostic results refer-
ringtoNATS.
(If necessary, carry out“C/U INITIALIZATION”with
CONSULT-II.)
Do not erase the NATS“SELF-DIAG RESULTS”by
using CONSULT-II.
Check the engine“SELF-DIAG RESULTS”with CON-
SULT-II by using the CONSULT-II generic program card.
(Engine diagnostic software included)
OK

Repair engine control system (Refer to EC section.)
when self-diagnostic results except“NATS MALFUNC-
TION”are detected. When only“NATS MALFUNCTION”
is detected, erase the self-diagnostic results and go to
the next step.
Start the engine. Does the engine start properly?NG
Erase the NATS and engine“SELF-DIAG RESULTS”by
using the CONSULT-II program card for NATS and
generic program card.
Start the engine.






















NATS (Nissan Anti-Theft System)
EL-349

SYMPTOM MATRIX CHART 1
(Self-diagnosis related item)
SYMPTOMDisplayed“SELF-DIAG
RESULTS”on
CONSULT-II screenDIAGNOSTIC
PROCEDURE
(Reference page)SYSTEM
(Malfunctioning part or mode)REFERENCE PART
NO. OF ILLUSTRATION
ON NEXT PAGE

Security indicator
lighting up*

Engine does not startECM INT CIRC-IMMUPROCEDURE 1
(EL-352)ECM B

Security indicator
lighting up*

Engine does not startCHAIN OF ECM-IMMUPROCEDURE 2
(EL-353)Open circuit in battery voltage
line of IMMU circuitC1
Open circuit in ignition line of
IMMU circuitC2
Open circuit in ground line of
IMMU circuitC3
Open circuit in communication
line between IMMU and ECMC4
Short circuit between IMMU and
ECM communication line and bat-
tery voltage lineC4
Short circuit between IMMU and
ECM communication line and
ground lineC4
ECM B
IMMU A
DIFFERENCE OF KEYPROCEDURE 3
(EL-355)Unregistered key D
IMMU A
CHAIN OF IMMU-KEYPROCEDURE 4
(EL-356)Malfunction of key ID chip E
IMMU A
Open circuit in ground line of
dongle circuitC6
Open or short circuit in communi-
cation line between IMMU and
dongle unitC5
Dongle control unit G
ID DISCORD, IMM-ECMPROCEDURE 5
(EL-358)System initialisation has not yet
been completed.F
ECM B
LOCK MODEPROCEDURE 7
(EL-361)LOCK MODE D

MI staying ON
Security indicator
lighting up*DON’T ERASE
BEFORE CHECKING
ENG DIAGWORK FLOW
(EL-349)Engine trouble data and NATS
trouble data have been detected
in ECM.—
*: When NATS detects trouble, the security indicator lights up while ignition key is in the“ON”position.
*: When the vehicle is equipped with dongle unit (RHD models for Europe), the security indicator blinks 6 times just after ignition switch is turned
to ON. Then the security indicator lights up while ignition key is in the“ON”position.
NATS (Nissan Anti-Theft System)
Trouble Diagnoses (Cont’d)
EL-350

SYMPTOM MATRIX CHART 2
(Non self-diagnosis related item)
SYMPTOMDIAGNOSTIC PROCEDURE
(Reference page)SYSTEM
(Malfunctioning part or mode)REFERENCE PART
NO. OF ILLUSTRATION
ON NEXT PAGE

Security ind. does not light up.PROCEDURE 6
(EL-360)Security ind.
Open circuit between Fuse and
NATS IMMU
Continuation of initialization mode
NATS IMMU
Security ind. does not blink just
after initialization even if the
vehicle is equipped with dongle
unit.
PROCEDURE 8
(EL-362)NATS might be initialized without connecting dongle unit properly.
Open circuit in ground line of
dongle circuitC6
Security ind. does not blink just
after ignition switch is turned to
ON when some malfunction
related to NATS is detected even
if the vehicle is equipped with
dongle unit.Open or short circuit in communi-
cation line between IMMU and
dongle unitC5
Dongle control unit G
DIAGNOSTIC SYSTEM DIAGRAM
NEL559 PA R T DKey ID chip (PART E)
NATS
ignition keyPA R T C 5Security
indicatorPA R T C 2
PA R T C 1
PA R T C 4
PA R T GPA R T A
PA R T B
PA R T C 6PA R T C 3PA R T F
NATS (Nissan Anti-Theft System)
Trouble Diagnoses (Cont’d)
EL-351

DIAGNOSTIC PROCEDURE 1
Self-diagnostic results:
“ECM INT CIRC-IMMU”displayed on CONSULT-II screen
Confirm SELF-DIAGNOSTIC RESULTS“ECM INT CIRC-IMMU”
displayed on CONSULT-II screen.
Ref. part No. B.
Replace ECM.
Perform initialisation with CONSULT-II.
For the operation of initialisation, refer to“CONSULT-II operation
manual NATS”.
SEL314W


NATS (Nissan Anti-Theft System)
Trouble Diagnoses (Cont’d)
EL-352

DIAGNOSTIC PROCEDURE 2
Self-diagnostic results:
“CHAIN OF ECM-IMMU”displayed on CONSULT-II screen
Confirm SELF-DIAGNOSTIC
RESULTS“CHAIN OF ECM-
IMMU”displayed on CON-
SULT-II screen.
OK
CHECK POWER SUPPLY CIRCUIT
FOR IMMU.
Check voltage between IMMU terminal

8and ground.
Battery voltage should exist.
OK
NG
Check the following.

10A fuse (No.39 :
gasoline engine,
located in the fuse
and fusible link box)

Harness for open or
short between fuse
and IMMU connector
Ref. part No, C1
CHECK IGN SW. ON SIGNAL.
Check voltage between IMMU terminal

7and ground while ignition switch is
“ON”position.
Battery voltage should exist.
OK
NG
Check the following.

10A fuse [No.12 ,
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 continuity between IMMU termi-
nal

4and ground.
Continuity should exist.
OK
NG
Repair harness.
Ref. part No. C3
CHECK COMMUNICATION OPEN
CIRCUIT.
Check continuity between IMMU termi-
nal

1and ECM terminal11 6(Gaso-
line engine) or
410(Diesel engine).
Continuity should exist.
OK
NG
Repair harness.
Ref. part No. C4

A
SELF DIAGNOSIS
TIME DTC RESULTS
CHAIN OF ECM-IMMU0
YEL471B
YEL472B
IMMU connector
YEL473B
IMMU connector
YEL474B
IMMU connector
NEL762
ECM connector
IMMU connector





NATS (Nissan Anti-Theft System)
Trouble Diagnoses (Cont’d)
EL-353

A
CHECK COMMUNICATION LINE
SHORT CIRCUIT.
1. Disconnect ECM connector and
IMMU connector.
2. Check continuity between IMMU ter-
minal

1and ground.
Continuity should not exist.
3. Turn ignition switch to ON.
4. Check voltage between IMMU termi-
nal

1and ground.
No voltage should exist.
OK
NG
Repair harness.
Ref. part No. C4
Check the signal from ECM to IMMU.
1. Check the signal between ECM ter-
minal

11 6and ground with CON-
SULT-II or oscilloscope when igni-
tion switch is turned ON.
2. Some signals can be detected dur-
ing 750 msec. just after ignition
switch is turned“ON”.
OK
NG
ECM is malfunctioning.
1. Replace ECM.
Ref part No. B
2. Perform initialization
procedure, refer to
“CONSULT-II opera-
tion manual NATS”.
IMMU is malfunctioning.
1. Replace IMMU.
Ref. part No. A
2. Perform initialization with CONSULT-
II.
For the initialization procedure, refer
to“CONSULT-II operation manual
NATS”.
YEL476B
IMMU connector
Short to ground check
IMMU connector
Short to power circuit check
NEL543



NATS (Nissan Anti-Theft System)
Trouble Diagnoses (Cont’d)
EL-354

DIAGNOSTIC PROCEDURE 3
Self-diagnostic results:
“DIFFERENCE OF KEY”displayed on CONSULT-II screen
Confirm SELF-DIAGNOSTIC
RESULTS“DIFFERENCE OF
KEY”displayed on CONSULT-II
screen.
OK
PERFORM INITIALISATION.
Perform initialisation with CONSULT-II.
Re-register all NATS ignition key IDs.
For the initialisation procedure, refer to
“CONSULT-II operation manual NATS”.
Can the system be initialized?
Note: If the initialisation is not com-
pleted or fails, CONSULT-II
shows
message on the
screen.
Ye s
No
IMMU is malfunction-
ing.
1. Replace IMMU.
Ref. part No. A
2. Perform initialisation
with CONSULT-II.
For the initialisation
procedure, refer to
“CONSULT-II opera-
tion manual NATS”.
Start engine.
END
(Ignition key ID had been unregistered.)
SELF DIAGNOSIS
TIME DTC RESULTS
DIFFERENCE OF KEY0
YEL478B
INITIALIZATION
FA I L
THEN IGN KEY SW ‘OFF’ AND
‘ON’, AFTER CONFIRMING
SELF-DIAG AND PASSWORD,
PERFORM C/U INITIALIZATION
AGAIN.
IMMU INITIALIZATION
YEL479B



NATS (Nissan Anti-Theft System)
Trouble Diagnoses (Cont’d)
EL-355

DIAGNOSTIC PROCEDURE 4
Self-diagnostic results:
“CHAIN OF IMMU-KEY”displayed on CONSULT-II screen
Confirm SELF-DIAGNOSTIC
RESULTS“CHAIN OF IMMU-
KEY”displayed on CONSULT-II
screen.
OK
CHECK NATS IGNITION KEY ID CHIP.
Can the engine start with another regis-
tered NATS ignition key?
No
Ye s
Ignition key ID chip is
malfunctioning.
1. Replace the ignition
key.
Ref. part No. E
2. Perform initialisation
with CONSULT-II.
For the initialisation
procedure, refer to
“CONSULT-II opera-
tion manual NATS”.
CHECK NATS IMMU INSTALLATION.
Refer to“How to Replace NATS IMMU”
in EL-363.
OK
NG
Reinstall NATS IMMU
correctly.
Is this vehicle equipped with dongle
unit (RHD models for Europe)?
Ye s
No
IMMU is malfunctioning.
1. Replace IMMU.
Ref part No. A
2. Perform initialisation
with CONSULT-II
For the initialisation
procedure, refer to
“CONSULT-II opera-
tion manual NATS”.

A
SELF DIAGNOSIS
TIME DTC RESULTS
CHAIN OF IMMU-KEY0
YEL480B



NATS (Nissan Anti-Theft System)
Trouble Diagnoses (Cont’d)
EL-356

A
CHECK HARNESS CONNECTOR
CONNECTION.
Check the following harness connector
connection.
E125/M70
M85
Does the engine start?
No
Ye s
System is OK.
(The malfunction is
caused by improper con-
nector connection.)
CHECK GROUND CIRCUIT FOR
DONGLE UNIT.
Check continuity between dongle unit
terminal

3and ground.
Continuity should exist.
Ye s
No
Repair harness.
CHECK INTERFACE CIRCUIT.
1. Check continuity between IMMU ter-
minal

2and dongle unit terminal

5(Open circuit check)
Continuity should exist.
2. Check continuity between IMMU ter-
minal

2and ground. (Short circuit
check)
Continuity should not exist.
Ye s
No
Repair harness.
Dongle unit is malfunctioning.
1. Replace dongle unit.
2. Perform initialisation with CONSULT-
II.
For the initialisation procedure, refer
to“CONSULT-II operation manual
NATS”.
SEL417W
Dongle unit connector
SEL418W
IMMU connectorDongle unit
connector
Short circuit check
SEL419WShort circuit check IMMU connector




NATS (Nissan Anti-Theft System)
Trouble Diagnoses (Cont’d)
EL-357

DIAGNOSTIC PROCEDURE 5
Self-diagnostic results:
“ID DISCORD, IMM-ECM”displayed on CONSULT-II screen
Confirm SELF-DIAGNOSTIC
RESULTS“ID DISCORD, IMM-
ECM*”displayed on CON-
SULT-II screen.*“ID DISCORD, IMM-ECM”:
Registered ID of IMMU is in
discord with that of ECM.
PERFORM INITIALISATION.
Perform initialisation with CONSULT-II.
Re-register all NATS ignition key IDs.
For the initialisation procedure, refer to
“CONSULT-II operation manual NATS”.
Can the system be initialized?
Note: If the initialisation is not com-
pleted or fails, CONSULT-II
shows
message on the
screen.
Ye s
No
ECM is malfunctioning.
1. Replace ECM.
Ref. part No. B
2. Perform initialisation
with CONSULT-II.
For the initialisation
procedure, refer to
“CONSULT-II opera-
tion manual NATS”.
Start engine. (END)
(System initialisation was not com-
pleted. Ref. part No. F)
C2SDD01
INITIALIZATION
FA I L
THEN IGN KEY SW ‘OFF’ AND
‘ON’, AFTER CONFIRMING
SELF-DIAG AND PASSWORD,
PERFORM C/U INITIALIZATION
AGAIN.
IMMU INITIALIZATION
YEL479B


NATS (Nissan Anti-Theft System)
Trouble Diagnoses (Cont’d)
EL-358