Nissan Terrano r20e. Instruction — part 253
Trouble Diagnoses
WORK FLOW
CHECK IN
Listen to customer complaints or request. (Get symptoms)
TROUBLE
KEY SERVICE REQUEST (Additional key ID registration)
H
Verify the security indicator and MI*.
INITIALISATION
(Refer to CONSULT-II operation
instruction NATS.)
E
Using the CONSULT-II program card for NATS check the
“SELF-DIAG RESULTS” with CONSULT-II.
F
Self-diagnostic results referring to NATS, but no information
about engine self-diagnostic results is displayed on CONSULT-
II.
Turn ignition switch “OFF”.
Repair NATS.
(If necessary, carry out “C/U INITIALIZATION” with CONSULT-
II.)
Turn ignition switch “ON”.
Erase the NATS “SELF-DIAG RESULTS” by using CONSULT-
II. (Touch “ERASE”.)
Start the engine.
NG
Verify no lighting up of the security indicator.
OK
CHECK OUT
Perform running test with CONSULT-II in engine “SELF-DIAG
RESULTS” mode.
NG
Verify “NO DTC IS DETECTED” displayed on the CONSULT-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 referring to
NATS.
(If necessary, carry out “C/U INITIALIZATION” with CON-
SULT-II.)
Do not erase the NATS “SELF-DIAG RESULTS” by using
CONSULT-II.
Check the engine “SELF-DIAG RESULTS” with CONSULT-II
by using the CONSULT-II generic program card.
(Engine diagnostic software included)
OK
F
Repair engine control system (Refer to EC section.) when
self-diagnostic results except “NATS MALFUNCTION” 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.
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
NATS (Nissan Anti-Theft System)
EL-195
SYMPTOM MATRIX CHART 1
(Self-diagnosis related item)
SYMPTOM
Displayed “SELF-DIAG
RESULTS” on
CONSULT-II screen
DIAGNOSTIC
PROCEDURE
(Reference page)
SYSTEM
(Malfunctioning part or mode)
REFERENCE PART NO.
OF ILLUSTRATION ON
NEXT PAGE
I
Security indicator light-
ing up*
I
Engine does not start
ECM INT CIRC-IMMU
PROCEDURE 1
ECM
B
I
Security indicator light-
ing up*
I
Engine does not start
CHAIN OF ECM-IMMU
PROCEDURE 2
Open circuit in battery voltage line
of IMMU circuit
C1
Open circuit in ignition line of IMMU
circuit
C2
Open circuit in ground line of IMMU
circuit
C3
Open circuit in communication line
between IMMU and ECM
C4
Short circuit between IMMU and
ECM communication line and bat-
tery voltage line
C4
Short circuit between IMMU and
ECM communication line and
ground line
C4
ECM
B
IMMU
A
DIFFERENCE OF KEY
PROCEDURE 3
Unregistered key
D
IMMU
A
CHAIN OF IMMU-KEY
PROCEDURE 4
Malfunction of key ID chip
E
IMMU
A
Open circuit in ground line of
dongle circuit
C6
Open or short circuit in communica-
tion line between IMMU and dongle
control unit
C5
Dongle control unit
G
ID DISCORD, IMM-ECM
PROCEDURE 5
System initialisation has not yet
been completed.
F
ECM
B
LOCK MODE
PROCEDURE 7
LOCK MODE
D
I
MI staying ON
I
Security indicator light-
ing up*
DON’T ERASE BEFORE
CHECKING ENG DIAG
WORK FLOW
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 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 “ON” position.
NATS (Nissan Anti-Theft System)
Trouble Diagnoses (Cont’d)
EL-196
SYMPTOM MATRIX CHART 2
(Non self-diagnosis related item)
SYMPTOM
DIAGNOSTIC PROCEDURE
(Reference page)
SYSTEM
(Malfunctioning part or mode)
REFERENCE PART
NO. OF ILLUSTRATION
ON NEXT PAGE
I
Security ind. does not light up.
PROCEDURE 6
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
NATS might be initialized without connecting dongle unit properly.
Open circuit in ground line of
dongle control circuit
C6
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 unit
C5
Dongle control unit
G
DIAGNOSTIC SYSTEM DIAGRAM
NEL559
NATS (Nissan Anti-Theft System)
Trouble Diagnoses (Cont’d)
EL-197
DIAGNOSTIC PROCEDURE 1
Self-diagnostic results:
“ECM INT CIRC-IMMU” displayed on CONSULT-II screen
Confirm SELF-DIAGNOSTIC RESULTS “ECM INT CIRC-IMMU” dis-
played 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 instruction
NATS”.
SEL314W
H
H
NATS (Nissan Anti-Theft System)
Trouble Diagnoses (Cont’d)
EL-198
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