2004 INFINITI FX35 bcm

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UNIFIED METER AND A/C AMP
Revision: 2004 November 2004 FX35/FX45
UNIFIED METER AND A/C AMPPFP:27760
System DescriptionAKS005N8

For the unified meter and A/C amp., the signal required for controlling the combination meter are inte-
grated in the A/C auto amp.

Unified meter and A/C amp. controls each operation for A/C auto amp. For information regarding A/C con-
trol, refer to AT C - 3 0 , "
AIR CONDITIONER CONTROL" in ATC section.

Unified meter and A/C amp. inputs necessary information for combination meter from each unit by CAN
communication and so on.

And unified meter and A/C amp. outputs these signals using communication line (TX, RX) between unified
meter and A/C amp. and combination meter.

The signals required for the distance to empty (DTE) display are centralized in the unified meter and A/C
amp., converted into data, and sent to the display unit (without NAVI) display control unit (with NAVI) using
CAN communication.

Other input signals are also sent to the ECM, TCM, AWD control unit, BCM, display unit (without NAVI)
and display control unit (with NAVI) using CAN communication.

The unified meter and A/C amp. have a CONSULT-II function (self-diagnostic results, CAN diagnostic
support monitor, data monitor).
INPUT/OUTPUT SIGNALS
Between Unified Meter & A/C amp. and Combination Meter
Unit Input Output
Unified meter and A/C amp.

Seat belt buckle switch signal (Driver's side)

Parking brake signal

Illumination control nighttime required signal

Refuel status signal

Low-fuel warning lamp condition signal

Combination meter receive error signal

Delivery destination data signal

Combination meter specifications signal

Vehicle speed signal (8-pulse)

Engine speed signal

Engine coolant temperature signal

Fuel level sensor signal (resistance value)

Malfunction indicator lamp signal

ABS warning lamp signal

Low tire pressure warning lamp signal

Brake warning lamp signal

A/T CHECK warning lamp signal

ICC warning lamp signal

Oil pressure switch signal

Door switch signal

AWD warning lamp signal

VDC OFF indicator lamp signal

SLIP indicator lamp signal

ASCD CRUISE indicator lamp signal

ASCD SET indicator lamp signal

High beam request signal

Turn indicator signal

Snow mode switch signal

ICC system display signal

A/T position indicator signal

Manual mode indicator signal

Manual mode gear position signal

CAN communication condition signal of A/T

Position lights request signal

Buzzer output signal

DI-48
WARNING LAMPS
Revision: 2004 November 2004 FX35/FX45
Oil Pressure Warning Lamp Stays Off (Ignition Switch ON)AKS005NF
1. CHECK SELF-DIAGNOSTIC RESULTS OF UNIFIED METER AND A/C AMP.
1. Start engine.
2. Select “METER A/C AMP” on CONSULT-II, and perform self-diagnosis of unified meter and A/C amp.
Refer to DI-31, "
CONSULT-II Function" .
3. After erasing the self-diagnostic results, perform self-diagnosis again.
Self-diagnostic results content
No malfunction detected>> GO TO 2.
Malfunction detected>> GO TO DI-16, "
Symptom Chart 2" in “COMBINATION METER”.
2. CHECK IPDM E/R OUTPUT SIGNAL
Activate IPDM E/R auto active test. Refer to PG-24, "
Auto Active Test" .
Does oil pressure warning lamp is blinking?
YES >> GO TO 5.
NO >> GO TO 3.
3. CHECK BCM INPUT SIGNAL
Select “DATA MONITOR” of “SIGNAL BUFFER”. Refer to BCS-12,
"CONSULT-II" . Operate ignition switch with “OIL PRESS SW” of
“DATA MONITOR” and check operate status.
OK or NG
OK >> GO TO 4.
NG >> Replace IPDM E/R. Refer to PG-30, "
Removal and
Installation of IPDM E/R" .
4. CHECK UNIFIED METER AND A/C AMP. INPUT SIGNAL
Select “METER A/C AMP” on CONSULT-II. Operate ignition switch
with “OIL W/L” of “DATA MONITOR” and check operation status.
OK or NG
OK >> Replace combination meter.
NG >> Replace BCM. Refer to BCS-15, "
Removal and Installa-
tion of BCM" . When ignition switch is in ON
position (Engine stopped): OIL PRESS SW ON
When engine running : OIL PRESS SW OFF
SKIA8709E
When ignition switch is in ON
position (Engine stopped): OIL W/L ON
When engine running : OIL W/L OFF
PKIA2064E

WARNING CHIME
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Revision: 2004 November 2004 FX35/FX45
WARNING CHIMEPFP:24814
Component Parts and Harness Connector LocationAKS005NK
System DescriptionAKS005NL
FUNCTION
Power is supplied at all times

through 50A fusible link (letter M , located in the fuse and fusible link box)

to BCM terminal 55

through 15A fuse [No. 22, located in the fuse block (J/B)]

to key switch terminal 2 (without Intelligent Key), and

to BCM terminal 42

through 10A fuse [No. 38, located in the fuse and fusible link box (with Intelligent Key)]

to key switch and ignition knob switch terminals 1 and 3

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

to unified meter and A/C amp. terminal 21, and

to combination meter terminal 8.
When ignition switch ON or START position, power is supplied
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DI-56
WARNING CHIME
Revision: 2004 November 2004 FX35/FX45

through 15A fuse [No. 1, located in the fuse block (J/B)]

to BCM terminal 38, and

through 10A fuse [No. 12, located in the fuse block (J/B)]

to unified meter and A/C amp. terminal 22

through 10A fuse [No. 14, located in the fuse block (J/B)]

to combination meter terminal 7.
Ground is supplied

to BCM terminals 49 and 52, and

to unified meter and A/C amp. terminals 29 and 30, and

to combination meter terminals 5, 6 and 15

through body grounds M35, M45 and M85.
NOTE:
When ignition key warning chime, light warning chime, and seat belt warning chime should be performed at
the same time, the priorities for each chime are the following.
1. Seat belt warning chime
2. Light warning chime
3. Ignition key warning chime
IGNITION KEY WARNING CHIME (WITHOUT INTELLIGENT KEY)
With the key inserted into the ignition switch, and the ignition switch OFF or ACC, when driver's door open, the
warning chime will sound.
Power is supplied

through key switch terminal 1

to BCM terminal 37.
Ground is supplied

to BCM terminal 62

through front door switch (driver side) terminal 1.
Front door switch (driver side) is case grounded.
BCM detects key inserted into the ignition switch, and sends key warning signal to unified meter and A/C amp.
with CAN communication line. Unified meter and A/C amp. sends key warning signal to combination meter
with communication line between unified meter and A/C amp. and combination meter.
When combination meter receives key warning signal, it sounds warning chime.
IGNITION KEY WARNING CHIME (WITH INTELLIGENT KEY)
When Mechanical Key Is Used
With the key inserted into the ignition switch, and the ignition switch LOCK or ACC, when driver's door open,
the warning chime will sound.
Power is supplied

through key switch and ignition knob switch terminal 4

to BCM terminal 37.
Ground is supplied

to BCM terminal 62

through front door switch (driver side) terminal 1.
Front door switch (driver side) is case grounded.
BCM detects key inserted into the ignition switch, and sends key warning signal to unified meter and A/C amp.
with CAN communication line. Unified meter and A/C amp. sends key warning signal to combination meter
with communication line between unified meter and A/C amp. and combination meter.
When combination meter receives key warning signal, it sounds warning chime.
When Intelligent Key Is Carried With The Driver
With the ignition knob is in LOCK (push switch ON) or ACC, when driver's door open, the warning chime will
sound.
Power is supplied

through key switch and ignition knob switch terminal 2

WARNING CHIME
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to Intelligent Key unit terminal 27.
Ground is supplied

to BCM terminal 62

through front door switch (driver side) terminal 1.
Front door switch (driver side) is case grounded.
BCM sends front door switch signal to Intelligent Key unit with CAN communication line.
Intelligent Key unit detects ignition knob return is forgotten, and sends key warning signal to unified meter and
A/C amp. with CAN communication line. Unified meter and A/C amp. sends key warning signal to combination
meter with communication line between unified meter and A/C amp. and combination meter.
When combination meter receives key warning signal, it sounds warning chime.
LIGHT WARNING CHIME
With the key removed from the ignition switch or with the ignition knob is in LOCK (push switch OFF) [with
Intelligent Key], the driver's door open, and the lighting switch in ON position, the warning chime will sound.
[Except when headlamp battery saver control operates (for 5 minutes after ignition switch is turned to OFF or
ACC position) and headlamps do not illuminate.]
Signal is supplied

from combination switch (lighting switch) terminals 1, 2, 3, 4, 5, 6, 7, 8, 9 and 10

to BCM terminals 2, 3, 4, 5, 6, 32, 33, 34, 35 and 36.
NOTE:
BCM detected lighting switch in 1st or 2nd position, refer to BCS-3, "
COMBINATION SWITCH READING
FUNCTION" .
Ground is supplied

to BCM terminal 62

through front door switch (driver side) terminal 1.
Front door switch (driver side) is case grounded.
BCM detects headlamps are illuminated, and sends light warning signal to unified meter and A/C amp. with
CAN communication line. Unified meter and A/C amp. sends light warning signal to combination meter with
communication line between unified meter and A/C amp. and combination meter.
When combination meter receives light warning signal, it sounds warning chime.
SEAT BELT WARNING CHIME
With ignition switch turned ON and seat belt unfastened [seat belt buckle switch (driver side) ON], warning
chime will sound for approximately 6 seconds.
Ground is supplied

to combination meter terminal 9

through seat belt buckle switch (driver side) terminal 60.
Seat belt buckle switch (driver side) terminal 61A is grounded through body grounds B15 and B45.
Combination meter sends seat belt unfastened [seat belt buckle switch (driver side) ON] signal to unified
meter and A/C amp. with communication line between unified meter and A/C amp. and combination meter.
BCM receives seat belt unfastened [seat belt buckle switch (driver side) ON] signal from unified meter and A/
C amp. with CAN communication line, and sends seat belt warning signal to unified meter and A/C amp. with
CAN communication line. Unified meter and A/C amp. sends seat belt warning signal to combination meter
with communication line between unified meter and A/C amp. and combination meter.
When combination meter receives seat belt warning signal, it sounds warning chime.
CAN Communication System DescriptionAKS007Z2
CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-
tronic control units are equipped onto a vehicle, and each control unit shares information and links with other
control units during operation (not independent). In CAN communication, control units are connected with 2
communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring.
Each control unit transmits/receives data but selectively reads required data only.
CAN Communication UnitAKS007YY
Refer to LAN-6, "CAN Communication Unit" in “LAN SYSTEM”.

DI-62
WARNING CHIME
Revision: 2004 November 2004 FX35/FX45
Terminals and Reference Value for BCMAKS005NO
Te r m i n a l
No.Wire
colorItemMeasuring condition
Reference value
Ignition
switchOperation or condition
2 GY Combination switch input 5 ONLighting, turn, wiper OFF
Wiper dial position 4
3 L/B Combination switch input 4 ONLighting, turn, wiper OFF
Wiper dial position 4
4 PU/W Combination switch input 3 ONLighting, turn, wiper OFF
Wiper dial position 4
5 Y/R Combination switch input 2
ONLighting, turn, wiper OFF
Wiper dial position 4
6 SB Combination switch input 1
32 GY/R Combination switch output 5 ONLighting, turn, wiper OFF
Wiper dial position 4
33 G Combination switch output 4 ONLighting, turn, wiper OFF
Wiper dial position 4
34 W/B Combination switch output 3 ONLighting, turn, wiper OFF
Wiper dial position 4
SKIA5291E
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SKIA5291E
SKIA5292E
SKIA5291E
SKIA5292E
SKIA5291E

WARNING CHIME
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Revision: 2004 November 2004 FX35/FX45
Preliminary CheckAKS005NS
CHECK POWER SUPPLY AND GROUND CIRCUIT
1. CHECK FUSE AND FUSIBLE LINK
Check BCM fuses and fusible link for blown-out.
Refer to DI-59, "Wiring Diagram — CHIME —" .
OK or NG
OK >> GO TO 2.
NG >> If fuse or fusible link is blown, be sure to eliminate cause of malfunction before installing new fuse
or fusible link. Refer to PG-3, "
POWER SUPPLY ROUTING CIRCUIT" .
2. CHECK POWER SUPPLY CIRCUIT
1. Disconnect BCM connector.
2. Check voltage between BCM harness connector terminals and
ground.
OK or NG
OK >> GO TO 3.
NG >> Check harness for open between BCM and fuse or fusible link.
3. CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between BCM harness connector M4 terminals
49 (B), 52 (B) and ground.
OK or NG
OK >> INSPECTION END
NG >> Repair harness or connector.
Unit Power source Fuse and fusible link No.
BCMBatteryM
22
Ignition switch ON or START 1
Terminals Ignition switch position
(+)
(–) OFF ACC ON
ConnectorTerminal
(Wire color)
M455 (G)
GroundBattery
voltageBattery
voltageBattery
voltage
42 (L/R)Battery
voltageBattery
voltageBattery
voltage
M3 38 (W/L) 0V 0VBattery
voltage
Continuity should exist.
SKIA5041E

DI-66
WARNING CHIME
Revision: 2004 November 2004 FX35/FX45
CONSULT-II FunctionAKS005NT
CONSULT-II performs the following functions communicating with the BCM.
DIAGNOSTIC ITEMS DESCRIPTION
CONSULT-II BASIC OPERATION 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 carry out CAN communication.
1. With the ignition switch OFF, connect “CONSULT-II” and “CON-
SULT-II CONVERTER” to the data link connector, and turn the
ignition switch ON.
2. Touch “START (NISSAN BASED VHCL)”.
3. Touch “BCM” on “SELECT SYSTEM” screen. If “BCM” is not
indicated, go to GI-40, "
CONSULT-II Data Link Connector (DLC)
Circuit" .
BCM diagnosis position Diagnosis mode Description
BUZZERData monitor The input data to the BCM control unit is displayed in real time.
Active test Operation of electrical loads can be checked by sending driving signal to them.
BCM Self-diagnostic BCM performs self-diagnosis of CAN communication.
PBIB1503E
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