Ins INFINITI QX56 2004 Factory Service Manual

REMOTE KEYLESS ENTRY SYSTEM
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Revision: August 20072004 QX56
Trouble Diagnosis ProcedureEIS002RY
1. Check the symptom and customer's requests.
2. Understand outline of system. Refer to BL-45, "
System Description" .
3. Confirm system operation.

Check that the power door lock system operates normally. Refer to BL-16, "POWER DOOR LOCK
SYSTEM" .

Check that the automatic back door system operates normally. Refer to BL-101, "AUTOMATIC BACK
DOOR SYSTEM" .
4. Perform pre-diagnosis inspection. Refer to BL-59, "
BCM Power Supply and Ground Circuit Check" .
5. Refer to trouble diagnosis chart by symptom, repair or replace any malfunctioning parts. Refer to BL-60,
"Trouble Diagnoses" .
6. Inspection End.
BCM Power Supply and Ground Circuit CheckEIS003EF
1. CHECK FUSES AND FUSIBLE LINK
Check the following BCM fuses and fusible link.
NOTE:
Refer to BL-44, "
Component Parts and Harness Connector Location" .
OK or NG
OK >> GO TO 2.
NG >> If fuse is blown, be sure to eliminate cause of problem before installing new fuse, refer to PG-4,
"POWER SUPPLY ROUTING CIRCUIT" .
2. CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM.
3. Check voltage between BCM connectors M18, M20 terminals
11, 38, 57, 70 and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness.
Component Parts Terminal No. (SIGNAL) Ampere No. Location
BCM57 (BAT power supply) 15A 22 Fuse block (J/B)
70 (BAT power supply) 50AfFuse and fusible link box
11 (ACC power supply) 10A 4 Fuse block (J/B)
38 (IGN power supply) 10A 59 Fuse and relay box
ConnectorTerminals
(Wire color)
Signal nameIgnition
switchVo l ta g e
(+) (–)
M2070 (W/B)
GroundBattery power
supplyOFFBattery
voltage
57 (Y/R)Battery power
supplyOFFBattery
voltage
M1811 ( O )ACC power
supplyACCBattery
voltage
38 (W/L)IGN power
supplyONBattery
voltage
WIIA0600E

BL-60
REMOTE KEYLESS ENTRY SYSTEM
Revision: August 20072004 QX56
3. CHECK GROUND CIRCUIT
Check continuity between BCM connector M20 terminal 67 and
ground.
OK or NG
OK >> Power supply and ground circuit is OK.
NG >> Repair or replace harness.
Trouble DiagnosesEIS002S0
SYMPTOM CHART
NOTE:

Always check the "Trouble Diagnosis Procedure" before troubleshooting. Refer to BL-59, "Trouble Diag-
nosis Procedure" .

Always check keyfob battery before replacing keyfob. Refer to BL-65, "Keyfob Battery and Function
Check" .

The panic alarm operation and power back door opener operation of remote keyless entry system do not
activate with the ignition key inserted in the ignition key cylinder.

Use Remote Keyless Entry Tester J-43241 (follow instructions on tester) to check operation of keyfob
before replacing keyfob.
ConnectorTe r m i n a l s
(Wire color)
Continuity
(+) (-)
M20 67 (B) Ground Yes
LIIA1040E
Symptom Diagnoses/service procedureReference
page
All functions of remote keyless entry system do not
operate.1. Keyfob battery and function check (use Remote Keyless Entry
Tester J-43241)
NOTE:
If the result of keyfob function check is OK, keyfob is not malfunc-
tioning.BL-65
2. Check BCM and keyless receiver.BL-66
The new ID of keyfob cannot be entered.1. Keyfob battery and function check (use Remote Keyless Entry
Tester J-43241)
NOTE:
If the result of keyfob function check is OK, keyfob is not malfunc-
tioning.BL-652. Key switch and key lock solenoid (insert) checkBL-62
3. Door switch checkBL-63
4. ACC power checkBL-68
5. Replace BCM.BCS-19
Door lock or unlock does not function.
(If the power door lock system does not operate
manually, check power door lock system. Refer to
BL-16, "
POWER DOOR LOCK SYSTEM" )1. Keyfob battery and function check (use Remote Keyless Entry
Tester J-43241)
NOTE:
If the result of keyfob function check is OK, keyfob is not malfunc-
tioning.BL-65
2. Replace BCM.BCS-19
Hazard and horn reminder does not activate prop-
erly when pressing lock or unlock button of keyfob.1. Check hazard and horn reminder mode with CONSULT-II
NOTE:
Hazard and horn reminder mode can be changed.
First check the hazard and horn reminder mode setting.BL-57
2. Door switch checkBL-63
3. Replace BCM.BCS-19

REMOTE KEYLESS ENTRY SYSTEM
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Hazard reminder does not activate properly when
pressing lock or unlock button of keyfob.
(Horn reminder OK)1. Check hazard reminder mode with CONSULT-II
NOTE:
Hazard reminder mode can be changed.
First check the hazard reminder mode setting.BL-57
2. Check hazard function with hazard switch —
3. Replace BCM.BCS-19
Horn reminder does not activate properly when
pressing lock or unlock button of keyfob.
(Hazard reminder OK)1. Check horn reminder mode with CONSULT-II
NOTE:
Horn reminder mode can be changed.
First check the horn reminder mode setting.BL-57
2. Check horn function with horn switch —
3. IPDM E/R operation checkBL-68
4. Replace BCM.BCS-19
Back door open/close operation is not carried out
with keyfob operation.
(The automatic back door system is normal.)1. Keyfob battery and function check (use Remote Keyless Entry
Tester J-43241)BL-652. Key switch (insert) checkBL-62
3. Check that glass hatch is closed —
4. Remote keyless entry receiver systemBL-68
5. Replace BCM.BCS-19
Room lamp, ignition keyhole illumination and step
lamp operation do not activate properly.1. Room lamp operation checkBL-70
2. Ignition kehole illumination operation checkBL-70
3.Step lamp operation checkLT- 1 3 0
4. Door switch checkBL-63
5. Replace BCM.BCS-19
Panic alarm (horn and headlamp) does not activate
when panic alarm button is continuously pressed.1. Keyfob battery and function check (use Remote Keyless Entry
Tester J-43241)
NOTE:
If the result of keyfob function check is OK, keyfob is not malfunc-
tioning.BL-65
2. Key switch and key lock solenoid (insert) checkBL-62
3. Replace BCM.BCS-19
Auto door lock operation does not activate properly.
(All other remote keyless entry functions OK.)1. Check auto door lock operation mode with CONSULT-II
NOTE:
Auto door lock operation mode can be changed.
First check the auto door lock operation mode setting.BL-57
2. Replace BCM.BCS-19
Keyless power window down (open) operation does
not activate properly.
(All other remote keyless entry functions OK.)1. Check power window down operation mode with CONSULT-II
NOTE:
Power window down operation mode can be changed.
First check the power window down operation mode setting.BL-57
2. Check power window function with switch —
3. Replace BCM.BCS-19
Symptom Diagnoses/service procedureReference
page

BL-62
REMOTE KEYLESS ENTRY SYSTEM
Revision: August 20072004 QX56
Key Switch (Insert) CheckEIS002S1
1. CHECK KEY SWITCH INPUT SIGNAL
With CONSULT-II
Check key switch "KEY ON SW" in DATA MONITOR mode with CONSULT–II. Refer to BL-27, "
DATA MONI-
TOR" .

When key is inserted to ignition key cylinder:

When key is removed from ignition key cylinder:
Without CONSULT-II
Check voltage between BCM connector M18 terminal 37 and
ground.
OK or NG
OK >> Key switch (insert) circuit is OK.
NG >> GO TO 2.
2. CHECK KEY SWITCH (INSERT)
1. Turn ignition switch OFF.
2. Disconnect key switch and key lock solenoid.
3. Check continuity between key switch terminals 3, 4.
OK or NG
OK >> Repair or replace harness.
NG >> Replace key switch.KEY ON SW : ON
KEY ON SW : OFF
LIIA0169E
ConnectorTerminal
(Wire color)
Condition Voltage (V)
( + ) ( – )
M18 37 (B/R) GroundKey is inserted. Battery voltage
Key is removed. 0
LIIA0567E
Terminals Condition Continuity
3 – 4Key is inserted. Yes
Key is removed. No
LIIA1044E

BL-66
REMOTE KEYLESS ENTRY SYSTEM
Revision: August 20072004 QX56
2. CHECK KEYFOB FUNCTION
With CONSULT-II
Check keyfob function in “DATA MONITOR” mode with CONSULT-II.
When pushing each button of keyfob, the corresponding monitor item should
be turned as follows.
Without CONSULT-II
Check keyfob function using Remote Keyless Entry Tester J-43241.
OK or NG
OK >> WITH CONSULT-II: Keyfob, remote keyless entry receiver and wiring harness between BCM and
remote keyless entry receiver are OK. Replace BCM. Refer to BCS-19, "
Removal and Installation
of BCM" .
OK >> WITHOUT CONSULT-II: Keyfob is OK. Further inspection is necessary. Refer to BL-60, "
Trouble
Diagnoses" .
NG >> WITH CONSULT-II: Further inspection is necessary. Refer to BL-60, "
Trouble Diagnoses" .
NG >> WITHOUT CONSULT-II: Replace keyfob. Refer to BL-71, "
ID Code Entry Procedure" .
Remote Keyless Entry Receiver System CheckEIS005X1
1. REMOTE KEYLESS ENTRY RECEIVER SIGNAL
Check signal voltage waveform between BCM connector M18 termi-
nal 20 and ground using an oscilloscope.
OK or NG
OK >> Remote keyless entry receiver signal power supply, ground and signal circuits are OK. Replace
BCM. Refer to BCS-19, "
Removal and Installation of BCM" .
NG >> GO TO 2.Condition Monitor item
Pushing LOCK KEYLESS LOCK : ON
Pushing UNLOCK KEYLESS UNLOCK : ON
Keep pushing UNLOCKRKE KEEP UNLK
turns to ON 3 seconds
after UNLOCK button
is pushed.
Pushing PANIC KEYLESS PANIC : ON
Pushing LOCK and UNLOCK
at the same timeRKE LCK-UNLCK : ON
Pushing Power Back Door KEYLESS PBD : ON
LIIA1487E
Condition:
Keyfob buttons released : Refer to BL-53, "
Te r m i -
nals and Reference Value
for BCM" .
Keyfob buttons pressed : Refer to BL-53, "
Te r m i -
nals and Reference Value
for BCM" .LIIA1275E

REMOTE KEYLESS ENTRY SYSTEM
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2. REMOTE KEYLESS ENTRY RECEIVER POWER SUPPLY INSPECTION
Check signal voltage waveform between BCM connector M18 termi-
nal 19 and ground using an oscilloscope.
OK or NG
OK >> GO TO 3.
NG >> Replace BCM. Refer to BCS-19, "
Removal and Installa-
tion of BCM" .
3. REMOTE KEYLESS ENTRY RECEIVER GROUND CIRCUIT INSPECTION (BCM)
Check continuity between BCM connector M18 terminal 18 and
ground.
OK or NG
OK >> GO TO 4.
NG >> Replace BCM. Refer to BCS-19, "
Removal and Installa-
tion of BCM" .
4. HARNESS INSPECTION BETWEEN BCM AND REMOTE KEYLESS ENTRY RECEIVER
1. Disconnect remote keyless entry receiver and BCM connectors.
2. Check continuity between remote keyless entry receiver con-
nector M120 terminals 1, 2, 4 and BCM connector M18 termi-
nals 18, 19, 20.
3. Check continuity between remote keyless entry receiver termi-
nals 1, 2 and 4 and ground.
OK or NG
OK >> Replace remote keyless entry receiver.
NG >> Repair or replace harness.19 (V/W) - Ground : Refer to BL-53, "
Te r m i -
nals and Reference Value
for BCM" .
WIIA0433E
18 (P) - Ground : Continuity should exist.
WIIA0434E
1 (P) - 18 (P) : Continuity should exist.
2 (G/W) - 20 (G/W) : Continuity should exist.
4 (V/W) - 19 (V/W) : Continuity should exist.
1 (P) - Ground : Continuity should not exist.
2 (G/W) - Ground : Continuity should not exist.
4 (V/W) - Ground : Continuity should not exist.
WIIA0308E

REMOTE KEYLESS ENTRY SYSTEM
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2. CHECK IPDM E/R INPUT VOLTAGE
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R and horn relay.
3. Check continuity between IPDM E/R connector E122 terminal
45 and horn relay connector H-1 terminal 1.
4. Check continuity between IPDM E/R connector E122 terminal
45 and ground.
OK or NG
OK >> Further inspection is necessary. Refer to BL-60, "SYMP-
TOM CHART" .
NG >> Repair or replace harness45 (G/W) - 1 (R/W) : Continuity should exist.
45 (G/W) - ground : Continuity should not exist.WIIA0679E

BL-76
VEHICLE SECURITY (THEFT WARNING) SYSTEM
Revision: August 20072004 QX56
System DescriptionEIS002SE
DESCRIPTION
Operation Flow

Setting the vehicle security system
Initial condition

Ignition switch is in OFF position.
Disarmed phase

When the vehicle is being driven or when doors or glass hatch is open, the vehicle security system is set
in the disarmed phase on the assumption that the owner is inside or near the vehicle.
Pre-armed phase and armed phase

There are three conditions to enable the vehicle security system to turn into the "pre-armed" phase and
transition into armed phase. The initial requirements are that hood, glass hatch and all doors must be
closed (ignition key removed) for the transition to take place. Those three conditions are:
1. Locking vehicle with either front power door lock switch before exiting vehicle and closing all doors.
2. Using keyfob to lock already closed doors after leaving the vehicle.
3. Using driver key cylinder switch to lock already closed doors after leaving the vehicle.

Upon any of the above three steps taking place, the security indicator lamp illuminates for 30 seconds,
then the system automatically shifts into the "armed" phase.
Canceling the set vehicle security system
When one of the following operations is performed, the armed phase is canceled.
1. Unlock the doors with the key or the keyfob.
2. Open the power back door with the keyfob. When the power back door is closed after opening the power
back door with the keyfob, the system returns to the armed phase.
Activating the alarm operation of the vehicle security system
Make sure the system is in the armed phase.
When one of the following operations is performed, the system sounds the horns and flashes the headlamps
for about 50 seconds.
1. Engine hood, glass hatch or any door is opened before unlocking door with key or keyfob.
2. Door is unlocked without using key or keyfob.
3. Power back door is opened without using the keyfob.
POWER SUPPLY AND GROUND CIRCUIT
Power is supplied at all times

through 10A fuse [No.19, located in the fuse block (J/B)]
PIIA1367E

BL-86
VEHICLE SECURITY (THEFT WARNING) SYSTEM
Revision: August 20072004 QX56
Terminals and Reference Value for IPDM E/REIS002SJ
*1: when horn reminder is ON.
*2: L/W is for USA.
*3: Y is for Canada.
CONSULT-II Function (BCM)EIS002SK
CONSULT-II can display each diagnostic item using the diagnostic test modes shown following.
Terminal Wire
ColorItem ConditionVoltage (V)
(Approx.)
38 B Ground — 0
39 W CAN-H — —
40 R CAN-L — —
41 Y/B Hood switchHood closed OFF Battery voltage
Hood open ON 0V
45 G/W Horn relayWhen doors locks are operated
using keyfob (OFF → ON) *1Battery voltage → 0V
52 L Headlamp low (LH)Ignition
SW ONLighting
switch
2ND posi-
tionOFF 0V
ON Battery voltage
54 R/Y Headlamp low (RH)Ignition
SW ONLighting
switch
2ND posi-
tionOFF 0V
ON Battery voltage
55 G Headlamp high (LH)Ignition
SW ONLighting
switch
HIGH or
PA S S
positionOFF 0V
ON Battery voltage
56L/W *2
Y *3Headlamp high (RH)Ignition
SW ONLighting
switch
HIGH or
PA S S
positionOFF 0V
ON Battery voltage
59 B Ground — 0
BCM
diagnostic test itemDiagnostic mode Description
Inspection by partWORK SUPPORTSupports inspections and adjustments. Commands are transmitted to the
BCM for setting the status suitable for required operation, input/output sig-
nals are received from the BCM and received date is displayed.
DATA MONITOR Displays BCM input/output data in real time.
ACTIVE TESTOperation of electrical loads can be checked by sending drive signal to
them.
SELF-DIAG RESULTS Displays BCM self-diagnosis results.
CAN DIAG SUPPORT MNTRThe result of transmit/receive diagnosis of CAN communication can be
read.
ECU PART NUMBER BCM part number can be read.
CONFIGURATION Performs BCM configuration read/write functions.

VEHICLE SECURITY (THEFT WARNING) SYSTEM
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Revision: August 20072004 QX56
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. Connect CONSULT-II and CONSULT-II CONVERTER to the
data link connector.
3. Turn ignition switch ON.
4. Touch “START (NISSAN BASED VHCL)".
5. Touch “BCM”.
If "BCM" is not indicated, refer to GI-39, "
CONSULT-II Data Link
Connector (DLC) Circuit" .
6. Touch “THEFT ALM” on the "SELECT TEST ITEM" screen.
BBIA0369E
BCIA0029E
BCIA0030E
LIIA1552E