2004 INFINITI QX56 ignition

AUTOMATIC BACK DOOR SYSTEM
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Revision: August 20072004 QX56
Open Switch System InspectionEIS002T9
1. OPEN SWITCH SIGNAL INSPECTION
1. Turn ignition switch OFF.
2. While fully closing and opening the back door, check voltage
between back door control unit connector B55 terminal 15 and
ground.
OK or NG
OK >> Open switch is OK.
NG >> GO TO 2.
2. OPEN SWITCH CIRCUIT INSPECTION
1. Disconnect back door latch and back door control unit connector.
2. Check continuity between back door control unit connector (A)
B55 terminal 15 and back door latch (open switch) connector (B)
D503 terminal 4.
3. Check continuity between back door latch (open switch) connec-
tor (B) D503 terminal 4 and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness.
3. OPEN SWITCH GROUND INSPECTION
Check continuity between back door latch (open switch) connector
D503 terminal 8 and ground.
OK or NG
OK >> Replace the back door latch.
NG >> Repair or replace harness.
15 (O/L) - Ground
LIIA0829EPIIA2171E
4 (O/L) - 15 (O/L) : Continuity should exist.
4 (O/L) - ground : Continuity should not exist.
LIIA2260E
8 (B) - Ground : Continuity should exist.
LIIA0828E

BL-126
AUTOMATIC BACK DOOR SYSTEM
Revision: August 20072004 QX56
Close Switch System InspectionEIS002TA
1. CLOSE SWITCH SIGNAL INSPECTION
1. Turn ignition switch OFF.
2. While fully opening and closing the back door, check voltage
between back door control unit connector B55 terminal 14 and-
ground.
OK or NG
OK >> Close switch is OK.
NG >> GO TO 2.
2. CLOSE SWITCH CIRCUIT INSPECTION
1. Disconnect back door latch and back door control unit.
2. Check continuity between back door control unit connector (A)
B55 terminal 14 and back door latch (close switch) connector
(B) D503 terminal 5.
3. Check continuity between back door latch (close switch) con-
nector (B) D503 terminal 5 and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness.
3. CLOSE SWITCH GROUND INSPECTION
Check continuity between back door latch (close switch) connector
D503 terminal 8 and ground.
OK or NG
OK >> Replace the back door latch.
NG >> Repair or replace harness.
14 (P) - Ground
LIIA0831EPIIA2172E
5 (P) - 14 (P) : Continuity should exist.
5 (P) - ground : Continuity should not exist.
LIIA2261E
8 (B) - Ground : Continuity should exist.
LIIA0828E

AUTOMATIC BACK DOOR SYSTEM
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Revision: August 20072004 QX56
Back Door Handle Switch System InspectionEIS002TB
1. BACK DOOR HANDLE SWITCH SIGNAL INSPECTION
1. Turn ignition switch OFF.
2. While operating the back door handle switch, check voltage
between back door control unit connector B55 terminal 26 and
ground.
OK or NG
OK >> Switch is OK.
NG >> GO TO 2.
2. BACK DOOR HANDLE SWITCH CIRCUIT INSPECTION
1. Disconnect back door handle switch and back door control unit.
2. Check continuity between back door control unit connector (A)
B55 terminal 26 and back door handle switch connector (B)
D706 terminal 3.
3. Check continuity between back door handle switch connector
(B) D706 terminal 3 and ground.
OK or NG
OK >> GO TO 4.
NG >> Repair or replace harness.
3. BACK DOOR HANDLE SWITCH GROUND INSPECTION
Check continuity between back door handle switch connector D706
terminal 4 and ground.
OK or NG
OK >> Replace the back door handle switch.
NG >> Repair or replace harness.
Connector terminal
(Wire color)
ConditionVoltage (V)
(Approx.)
( + ) ( - )
26 (V) GroundBack door handle switch (ON) 0
Other (OFF) 5
LIIA0833E
3 (V) - 26 (V) : Continuity should exist.
3 (V) - 26 (V) : Continuity should not exist.
LIIA2262E
4 (B) - Ground : Continuity should exist.
WIIA0605E

BL-128
AUTOMATIC BACK DOOR SYSTEM
Revision: August 20072004 QX56
Cinch Latch Motor System InspectionEIS002TC
1. CINCH LATCH MOTOR CIRCUIT INSPECTION
1. Turn ignition switch OFF.
2. Disconnect back door latch and back door control unit.
3. Check continuity between back door control unit connector (A)
B55 terminals 11, 12 and back door latch (cinch latch motor)
connector (B) D503 terminals 1, 2.
4. Check continuity between back door latch (cinch latch motor)
connector (B) D503 terminals 1, 2 and ground.
OK or NG
OK >> GO TO 2.
NG >> Repair or replace harness.
2. CINCH LATCH MOTOR OPERATION INSPECTION
Connect battery power to terminals 1 and 2 on the back door latch
and check motor operation.
OK or NG
OK >> GO TO 3.
NG >> Replace the back door latch.
3. CINCH LATCH MOTOR SIGNAL INSPECTION
1. Reconnect back door latch and back door control unit.
2. While fully opening and closing the back door, check voltage
between back door control unit connector B55 terminals 11, 12
and ground.
OK or NG
OK >> Cinch latch motor circuit is OK.
NG >> Replace the back door control unit.1 (L) - 12 (L) : Continuity should exist.
2 (Y) - 11 (Y) : Continuity should exist.
1 (L) - ground : Continuity should not exist.
2 (Y) - ground : Continuity should not exist.
LIIA2263E
1 (+) - 2 (-) : It operates.
1 (-) - 2 (+) : It operates. (Reverse rotation)
LIIA1937E
11 (Y) - Ground
12 (L) - Ground
LIIA0836ESIIA1480E

IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-NATS)
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System DescriptionEIS002TM
IVIS (Infiniti Vehicle Immobilizer System-NATS) has the following immobilizer functions:

Since only IVIS (NATS) ignition keys, whose IDs have been registered into the ECM and BCM, allow the
engine to run, operation of a stolen vehicle without an IVIS (NATS) registered key is prevented by IVIS
(NATS).
IVIS (NATS) will immobilize the engine if someone tries to start it without the registered key of IVIS
(NATS).

All of the originally supplied ignition key IDs have been IVIS (NATS) registered.
If requested by the vehicle owner, a maximum of five key IDs can be registered into the IVIS (NATS) com-
ponents.

The security indicator blinks when the ignition switch is in OFF or ACC position. IVIS (NATS) warns out-
siders that the vehicle is equipped with the anti-theft system.

When IVIS (NATS) detects a malfunction, the security indicator lamp lights up while ignition key is in the
ON position.

IVIS (NATS) trouble diagnoses, system initialization and additional registration of other IVIS (NATS) igni-
tion key IDs must be carried out using CONSULT-II hardware and CONSULT-II IVIS (NATS) software.
When IVIS (NATS) initialization has been completed, the ID of the inserted ignition key is automatically
IVIS (NATS) registered. Then, if necessary, additional registration of other IVIS (NATS) ignition key IDs
can be carried out.
Regarding the procedures of IVIS (NATS) initialization and IVIS (NATS) ignition key ID registration, refer
to CONSULT-II Operation Manual NATS-IVIS/NVIS.

When servicing a malfunction of the IVIS (NATS) (indicated by lighting up of Security Indicator
Lamp) or registering another IVIS (NATS) ignition key ID, it may be necessary to re-register origi-
nal key identification. Therefore, be sure to receive ALL KEYS from vehicle owner.
System CompositionEIS0 02 T N
The immobilizer function of the IVIS (NATS) consists of the following:

NATS ignition key

NATS antenna amp. located in the ignition key cylinder

Body control module (BCM)

Engine control module (ECM)

Security indicator
NOTE:
The communication between ECM and BCM uses the CAN communication system.
PIIA1121E

BL-140
IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-NATS)
Revision: August 20072004 QX56
ECM Re-communicating FunctionEIS002TO
The following procedure can automatically perform re-communication of ECM and BCM, but only when the
ECM has been replaced with a new one which has never been energized on-board.
(In this step, initialization procedure by CONSULT-II is not necessary)
NOTE:

When registering new key IDs or replacing the ECM other than brand new, refer to CONSULT-II
Operation Manual NATS-IVIS/NVIS.

If multiple keys are attached to the key holder, separate them before work.

Distinguish keys with unregistered key ID from those with registered ID.
1. Install ECM.
2. Using a registered key (*1), turn ignition switch to ON.
*1: To perform this step, use the key that has been used before performing ECM replacement.
3. Maintain ignition switch in ON position for at least 5 seconds.
4. Turn ignition switch to OFF.
5. Start engine.
If engine can be started, procedure is completed.
If engine cannot be started, refer to CONSULT-II Operation Manual NATS-IVIS/NVIS and initialize control
unit.

BL-142
IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-NATS)
Revision: August 20072004 QX56
Terminals and Reference Value for BCMEIS002TQ
CONSULT-IIEIS002TR
CONSULT-II INSPECTION PROCEDURE
CAUTION:
If CONSULT-II is used with no connection of CONSULT-II CONVERTER, malfunctions might be
detected in self-diagnosis depending on control unit which carries out CAN communication.
1. Turn ignition switch OFF.
2. Insert IVIS (NATS) program card into CONSULT-II.
3. Connect CONSULT-II and CONSULT-II CONVERTER to data
link connector.
4. Turn ignition switch ON.
5. Touch “START”.
Terminal Wire
ColorItem ConditionVoltage (V)
(Approx.)
21 G NATS antenna amp. Ignition switch (OFF → ON)Just after turning ignition switch
ON: Pointer of tester should move.
23 G/O Security indicator lampGoes OFF → illuminates (Every 2.4
seconds)Battery voltage → 0
25 BR NATS antenna amp. Ignition switch (OFF → ON)Just after turning ignition switch
ON: Pointer of tester should move.
38 W/L Ignition switch (ON or START)Ignition switch (ON or START posi-
tion)Battery voltage
39 W CAN-H — —
40 R CAN-L — —
57 Y/R Battery power supply — Battery voltage
67 B Ground — 0
70 W/B Battery power supply — Battery voltage
Program card : NATS (AEN04A-1) or later
BBIA0369E
PBR4 55 D

IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-NATS)
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Revision: August 20072004 QX56
6. Touch "JA60" and "OK" on "VEHICLE SELECT" screen. For cancelling touch "CANCEL" on "VEHICLE
SELECT" screen.
NOTE:
Confirm vehicle model on IDENTIFICATION PLATE. Refer to
GI-46, "
Model Variation"
7. Select “NATS V.5.0”.
If “NATS V5.0” is not indicated, go to GI-39, "
CONSULT-II Data
Link Connector (DLC) Circuit" .
8. Perform each diagnostic test mode according to each service
procedure.
For further information, see the CONSULT-II Operation Manual
NATS-IVIS/NVIS.
CONSULT-II DIAGNOSTIC TEST MODE FUNCTION
NOTE:

When any initialization is performed, all IDs previously registered will be erased and all NATS ignition keys
must be registered again.

The engine cannot be started with an unregistered key. In this case, the system will show “DIFFERENCE
OF KEY” or “LOCK MODE” as a self-diagnostic result on the CONSULT-II screen.

In rare case, “CHAIN OF ECM-IMMU” might be stored as a self-diagnostic result during key registration
procedure, even if the system is not malfunctioning.
LKIA0606E
SEL027X
SEL150X
CONSULT-II DIAGNOSTIC TEST
MODEDescription
C/U INITIALIZATIONWhen replacing any of the following components, C/U initialization and re-registration of all
NATS ignition keys are necessary.
[(NATS ignition key/ BCM/ ECM]
SELF-DIAG RESULTSDetected items (screen terms) are as shown in the chart.
Refer to BL-144, "
IVIS (NATS) SELF-DIAGNOSTIC RESULTS ITEM CHART" .