unit NISSAN TERRANO 2002 Service Repair Manual

Trouble Diagnosis
The Timer Control Unit includes software to help during development testing, manufacturing and service.
It allows the technician to put it into Diagnostic Mode. In this mode, all switch inputs can be tested for conti-
nuity and if so equipped, alarm triggers identified.
When the time control unit is in Diagnostic Mode, the control unit tests the component and indicate the result
by the hazard lamp flashing.
On vehicles with a theft warning system, the TCU will first indicate the source of the last three alarm triggers
by flashing the hazard lamp. (Refer to ªTHEFT WARNING SYSTEMº, EL-209.)
ESTART
NOTE: Before entering diagnostic mode, make sure the vehicle is fully unlocked,
the ignition is switched off and the hazard switch is off.
Press the rear defogger switch exactly 6 times within 10 seconds.
FNG
The hazard lamp flash at 3 Hz for 1 second to confirm step I.
OK
Within 10 seconds after confirmation of step I, turn the ignition ON, for at least 2 seconds.
FNG
The hazard lamp flash at 3 Hz for 1 second to confirm step II.
OK
Within 10 seconds after confirmation of step II, turn the ignition off,
remove the ignition key and press the rear defogger switch for at least 5 seconds.
NGThe hazard lamp flash at 3 Hz for 3 seconds to confirm diagnostic mode is entered.
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TIME CONTROL UNIT (TCU)
EL-182

Checks
Once in Diagnostic Mode (and after identifying the last three alarm triggers in case a theft warning system is
equipped on the vehicle), the following inputs can be tested.
USER ACTION TCU Reaction COMPONENT TESTED
Driver's door opened from closed
(all other doors closed)Hazards flash once Driver's door open signal
Passenger or rear door opened from closed
(all other doors closed)Hazards flash once Door open signal for opened door
Driver's door locked from unlocked Hazards flash once Driver's door status signal
Passenger door locked from unlocked Hazards flash once Assist door status signal
Rear doors locked from unlocked
(with ultrasonic model)Hazards flash once Rear doors status signal
Ultrasonics cancel switch is pressed
(with ultrasonic model)Hazards flash once U/S cancel signal
Trunk or back door is opened from closed Hazards flash once Trunk open signal
Hood is opened from closed
(with ultrasonic model)Hazards flash once Hood open signal
Hazard switch is pressed from off Hazards flash once Hazard switch signal
Turn signal switch is moved to left from off Hazards flash once Left turn signal
Turn signal switch is moved to right from off Hazards flash once Right turn signal
Key turned to lock position in door Hazards flash once * Key cylinder lock switch signal
Lighting switch turned 1st position or 2nd
position from offHazards flash once Tail lamp signal
Key put in ignition cylinder from out Hazards flash once Key in detect signal
Central unlock switch is pressed Hazards flash once Central unlock/Trunk release signal
*) Hazards may flash a second time because of Driver's door status signal change. The min. delay time between flash actions is
100 ms.
In case the system does not operate as described above, check the concerned circuit for open or short.
After completion, the Diagnostic Mode can be switched off by pressing the rear defogger switch or by turning
the ignition to ªONº. The hazard lamp will flash at 3 Hz for 3 seconds to confirm that Diagnostic Mode has
been switched off.
TIME CONTROL UNIT (TCU)
Trouble Diagnosis (Cont'd)
EL-183

Schematic
YEL168D
TIME CONTROL UNIT (TCU)
EL-184

YEL169D
TIME CONTROL UNIT (TCU)
Schematic (Cont'd)
EL-185

System Description
NATS has the following immobiliser functions:
IThis version of NATS has dongle control unit to improve its anti-theft performance (RHD models). Dongle
control unit has its own ID which is registered into NATS IMMU. So if dongle unit is replaced, initialization
must be carried out.
IWhen malfunction of dongle unit is detected:
The security indicator lamp illuminates for about 15 minutes after ignition switch is turned to ON.
Ð When dongle control unit has a malfunction, and the indicator lamp is illuminated, engine can not be
started. However engine can be started only one time when security indicator lamp turns off in about
15 minutes after ignition switch is turned to ON.
ISince only NATS ignition keys, whose ID nos. have been registered into the ECM and IMMU of NATS,
allow the engine to run, operation of a stolen vehicle without a NATS registered key is prevented by NATS.
That is to say, NATS will immobilize the engine if someone tries to start it without the registered key of
NATS.
IAll of the originally supplied ignition key IDs have been NATS registered.
If requested by the vehicle owner, a maximum of five key IDs can be registered into the NATS compo-
nents.
IThe NATS security indicator (NATS security ind.) blinks when the ignition switch is in ªOFFº or ªACCº
position. Therefore, NATS warns outsiders that the vehicle is equipped with the anti-theft system.
IWhen NATS detects trouble, the security indicator lamp lights up as follows.
Condition IGN ON andWith dongle Without dongle
MIL Security indicator MIL Security indicator
NATS malfunction
(except dongle control
unit) is detectedÐ 6 times blinking
Staying ON after ignition
switch is turned ONÐ Staying ON
Only malfunction of
dongle control unit is
detected.Ð Staying ON for about 15
minutes after ignition
switch is turned ONÐÐ
Malfunction of NATS and
engine related parts are
detected.Staying ON 6 times blinking
Staying ON after ignition
switch is turned ONStaying ON Staying ON
Only engine related part
malfunction is detected.Staying ON Ð Staying ON Ð
Just after initialization of
NATSÐ 6 times blinking Ð Ð
INATS trouble diagnoses, system initialisation and additional registration of other NATS ignition key IDs
must be carried out using CONSULT-II hardware and CONSULT-II NATS software.
Regarding the procedures of NATS initialisation and NATS ignition key ID registration, refer to CONSULT-II
operation manual, NATS.
IWhen servicing a malfunction of the NATS (indicated by lighting up of security Indicator Lamp) or
registering another NATS ignition key ID no., it may be necessary to re-register original key iden-
tification. Therefore, be sure to receive all keys and the PIN code from vehicle owner.
NATS (Nissan Anti-Theft System)
EL-186

System Composition
The immobiliser function of the NATS for Nissan model R20 consists of the following:
INATS ignition key
INATS immobiliser control unit (NATS IMMU), located in the ignition key cylinder
IEngine control module (ECM)
IDongle control unit (RHD models)
INATS security indicator
INATS audio link
YEL349D
NATS (Nissan Anti-Theft System)
EL-187

HOW TO READ SELF-DIAGNOSTIC RESULTS
NATS SELF-DIAGNOSTIC RESULTS ITEM CHART
Detected items
(NATS program card screen
terms)P No. Code
(Self-diagnos-
tic result of
ªENGINEº)Malfunction is detected when ... Reference page
ECM INT CIRC-IMMUNATS MAL-
FUNCTION
P1613The malfunction of ECM internal circuit of IMMU communication line is
detected.EL-198
CHAIN OF ECM-IMMUNATS MAL-
FUNCTION
P1612Communication impossible between ECM and IMMU EL-199
DIFFERENCE OF KEYNATS MAL-
FUNCTION
P1615IMMU can receive the key ID signal but the result of ID verification between
key ID and IMMU is NG.EL-201
CHAIN OF IMMU-KEYNATS MAL-
FUNCTION
P1614IMMU cannot receive the key ID signal. Or the registered ID signal from
dongle unit can not be received when the IMMU request the ID.EL-202
ID DISCORD, IMM-ECMNATS MAL-
FUNCTION
P1611The result of ID verification between IMMU and ECM is NG. System initializa-
tion is required.EL-204
DON'T ERASE BEFORE
CHECKING ENG DIAGÐAll engine trouble codes except NATS trouble code have been detected in
ECM.EL-195
LOCK MODENATS MAL-
FUNCTION
P1610When the starting operation is carried out five or more times consecutively
under the following conditions, NATS will shift the mode to one which pre-
vents the engine from being started.
IUnregistered ignition key is used.
IIMMU or ECM is malfunctioning.EL-206
SEL308W
NATS (Nissan Anti-Theft System)
CONSULT-II (Cont'd)
EL-194

SYMPTOM MATRIX CHART 1
(Self-diagnosis related item)
SYMPTOMDisplayed ªSELF-DIAG
RESULTSº on
CONSULT-II screenDIAGNOSTIC
PROCEDURE
(Reference page)SYSTEM
(Malfunctioning part or mode)REFERENCE PART NO.
OF ILLUSTRATION ON
NEXT PAGE
ISecurity indicator light-
ing up*
IEngine does not startECM INT CIRC-IMMUPROCEDURE 1
(EL-198)ECM B
ISecurity indicator light-
ing up*
IEngine does not startCHAIN OF ECM-IMMUPROCEDURE 2
(EL-199)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-201)Unregistered key D
IMMU A
CHAIN OF IMMU-KEYPROCEDURE 4
(EL-202)Malfunction of key ID chip E
IMMU A
Open circuit in ground line of
dongle circuitC6
Open or short circuit in communica-
tion line between IMMU and dongle
control unitC5
Dongle control unit G
ID DISCORD, IMM-ECMPROCEDURE 5
(EL-204)System initialisation has not yet
been completed.F
ECM B
LOCK MODEPROCEDURE 7
(EL-206)LOCK MODE D
IMI staying ON
ISecurity indicator light-
ing up*DON'T ERASE BEFORE
CHECKING ENG DIAGWORK FLOW
(EL-195)Engine trouble data and NATS
trouble data have been detected in
ECM.Ð
*: When NATS detects trouble, the security indicator lights up while ignition key is in the ªONº position.
*: When the vehicle is equipped with dongle control unit (RHD models), 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 ªONº position.
NATS (Nissan Anti-Theft System)
Trouble Diagnoses (Cont'd)
EL-196

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
ISecurity ind. does not light up.PROCEDURE 6
(EL-205)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-207)NATS might be initialized without connecting dongle unit properly.
Open circuit in ground line of
dongle control 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 communica-
tion line between IMMU and dongle
control unitC5
Dongle control unit G
DIAGNOSTIC SYSTEM DIAGRAM
NEL559
NATS (Nissan Anti-Theft System)
Trouble Diagnoses (Cont'd)
EL-197

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.
Can the engine start with another regis-
tered NATS ignition key?
No
EYe s
IIgnition 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
ªCONSULT-II operation
manual NATSº.
CHECK NATS IMMU INSTALLATION.
Refer to ªHow to Replace NATS IMMUº in
EL-208.
OK
ENG
Reinstall NATS IMMU cor-
rectly.
Is this vehicle equipped with dongle con-
trol unit (RHD models)?
Ye s
ENo
IMMU is malfunctioning.
1. Replace IMMU.
Ref part No. A
2. Perform initialisation
with CONSULT-II
For the initialisation
procedure, refer to
ªCONSULT-II operation
manual NATSº.
qA
YEL480B
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NATS (Nissan Anti-Theft System)
Trouble Diagnoses (Cont'd)
EL-202