unified meter control unit INFINITI M35 2007 Factory User Guide

BCS-8
BCM (BODY CONTROL MODULE)
Revision: 2007 April2007 M35/M45
MAJOR COMPONENTS AND CONTROL SYSTEM
System Input Output
Intelligent Key system Intelligent Key unit

All door locking actuator

Trunk lid opener actuator

Turn signal lamp (LH, RH)

Combination meter
Power door lock system

Power window main switch (door lock and unlock switch)

Power window sub switch (passenger side)
(door lock and unlock switch)All-door locking actuator
Power supply (IGN) to power win-
dow, sunroofIgnition power supply Power window and sunroof system
Power supply (BAT) to power win-
dow, sunroof and power seatBattery power supplyPower window, sunroof system
and power seat
Panic alarm

Key slot

Intelligent KeyIPDM E/R
Theft warning system

All-door switch

Hood switch

Intelligent Key

Power window main switch (door lock and unlock switch)

IPDM E/R

Security indicator lamp
Auto light system

Optical sensor

Combination switchIPDM E/R
Exterior lamp battery saver control

Ignition switch

Combination switchIPDM E/R

Headlamp

Tail lampCombination switch

IPDM E/R

Combination meter
Front fog lamp Combination switch

IPDM E/R

Combination meter
Turn signal lamp Combination switch

Turn signal lamp

Combination meter
Hazard lamp Hazard switch

Turn signal lamp

Combination meter
Interior room lamp timer

Key switch

Power window main switch (door lock and unlock switch)

Front door switch driver side

All-door switchInterior room lamp
Key warning chime*
1
Key switch

Front door switch driver sideCombination meter
(warning buzzer)
Light warning chime

Combination switch

Front door switch driver sideCombination meter
(warning buzzer)
Tire pressure monitoring system Low tire pressure warning control unitCombination meter
(warning buzzer)
(warning lamp)
Seat belt warning chime

Combination meter [Seat belt buckle (driver side) switch]

Ignition switchCombination meter
(warning buzzer)
Vehicle-speed-sensing intermittent
wiper

Combination switch

Unified meter and A/C amp.IPDM E/R
Rear window defogger

Multifunction switch

NAVI control unit*2

AV control unit*3
IPDM E/R

DI-1
DRIVER INFORMATION SYSTEM
K ELECTRICAL
CONTENTS
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DRIVER INFORMATION SYSTEM
PRECAUTION ............................................................ 3
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” .................................................................. 3
PREPARATION ........................................................... 4
Commercial Service Tools ........................................ 4
COMBINATION METERS ........................................... 5
System Description .................................................. 5
UNIFIED METER CONTROL UNIT ...................... 5
UNIFIED METER AND A/C AMP. ......................... 5
POWER SUPPLY AND GROUND CIRCUIT ........ 5
SPEEDOMETER ................................................... 6
TACHOMETER ..................................................... 6
WATER TEMPERATURE GAUGE ........................ 6
FUEL GAUGE ....................................................... 7
ODO/TRIP METER ............................................... 7
METER ILLUMINATION CONTROL ..................... 8
FAIL-SAFE ............................................................ 9
Arrangement of Combination Meter ....................... 10
Component Parts Location ...................................... 11
Internal Circuit ........................................................ 12
Wiring Diagram — METER — ................................ 13
Terminals and Reference Value for Combination
Meter ...................................................................... 15
Terminals and Reference Value for Unified Meter
and A/C Amp. ......................................................... 16
Self-Diagnosis Mode of Combination Meter ........... 17
SELF-DIAGNOSIS FUNCTION .......................... 17
OPERATION PROCEDURE ............................... 17
CONSULT-II Function (METER A/C AMP) ............. 18
Trouble Diagnosis .................................................. 18
HOW TO PERFORM TROUBLE DIAGNOSIS ... 18
PRELIMINARY CHECK ...................................... 18
Symptom Chart ...................................................... 18
Power Supply and Ground Circuit Inspection ........ 19
Vehicle Speed Signal Inspection ............................ 20
Engine Speed Signal Inspection ............................ 21
Engine Coolant Temperature Signal Inspection ..... 22
Fuel Level Sensor Signal Inspection ...................... 22
Fuel Gauge Pointer Fluctuates, Indicator Wrong Value or Varies ....................................................... 25
Fuel Gauge Does Not Move to FULL Position ....... 25
Electrical Components Inspection .......................... 26
CHECK FUEL LEVEL SENSOR UNIT ................ 26
Removal and Installation of Combination Meter ..... 27
REMOVAL ........................................................... 27
INSTALLATION ................................................... 27
Disassembly and Assembly of Combination Meter ... 27
DISASSEMBLY ................................................... 27
ASSEMBLY ......................................................... 27
UNIFIED METER AND A/C AMP .............................. 28
System Description ................................................. 28
COMBINATION METER CONTROL FUNCTION ... 28
A/C AUTO AMP. FUNCTION ............................... 29
OTHER FUNCTIONS .......................................... 29
Schematic ............................................................... 30
CONSULT-II Function (METER A/C AMP) ............. 31
CONSULT-II BASIC OPERATION ....................... 31
SELF-DIAG RESULTS ........................................ 31
DATA MONITOR ................................................. 32
Power Supply and Ground Circuit Inspection ......... 34
DTC [U1000] CAN Communication Circuit ............. 35
DTC [B2202] Meter Communication Circuit ........... 35
DTC [B2205] Vehicle Speed Circuit ........................ 38
Removal and Installation of Unified Meter and A/C
Amp. ....................................................................... 38
REMOVAL ........................................................... 38
INSTALLATION ................................................... 38
WARNING LAMPS .................................................... 39
System Description ................................................. 39
OIL PRESSURE WARNING LAMP ..................... 39
Component Parts and Harness Connector Location ... 40
Schematic ............................................................... 41
Wiring Diagram — WARN — .................................. 42
Oil Pressure Warning Lamp Stays Off (Ignition
Switch ON) ............................................................. 52
Oil Pressure Warning Lamp Does Not Turn Off (Oil
Pressure Is Normal) ................................................ 53
Electrical Component Inspection ............................ 54
OIL PRESSURE SWITCH ................................... 54

DI-2Revision: 2007 April2007 M35/M45 A/T INDICATOR ........................................................ 55
System Description ................................................. 55
MANUAL MODE .................................................. 55
NOT MANUAL MODE ......................................... 55
Wiring Diagram — AT/IND — ................................. 56
A/T Indicator Is Malfunction .................................... 58
WARNING CHIME ..................................................... 59
System Description ................................................. 59
POWER SUPPLY AND GROUND CIRCUIT ....... 59
IGNITION KEY WARNING CHIME (WITH INTEL-
LIGENT KEY) ...................................................... 60
LIGHT WARNING CHIME ................................... 60
SEAT BELT WARNING CHIME ........................... 60
Component Parts and Harness Connector Location ... 61
Schematic ............................................................... 62
Wiring Diagram — CHIME — ................................. 63
Terminals and Reference Value for Combination
Meter ...................................................................... 66
Terminals and Reference Value for Unified Meter
and A/C Amp. ......................................................... 66
Terminals and Reference Value for BCM ................ 67
CONSULT-II Function (BCM) .................................. 68
CONSULT-II BASIC OPERATION ....................... 68
DATA MONITOR .................................................. 68
ACTIVE TEST ..................................................... 69
SELF-DIAG RESULTS ........................................ 69
CONSULT-II Function (METER A/C AMP) ............. 69
Trouble Diagnosis ................................................... 70
HOW TO PERFORM TROUBLE DIAGNOSIS .... 70
PRELIMINARY INSPECTION ............................. 70
SYMPTOM CHART ............................................. 70
Meter Buzzer Circuit Inspection .............................. 70
Lighting Switch Signal Inspection ........................... 71
Front Door Switch (Driver Side) Signal Inspection ... 72
Seat Belt Buckle Switch Signal Inspection ............. 73
Electrical Component Inspection ............................ 74
FRONT DOOR SWITCH (DRIVER SIDE) ........... 74
SEAT BELT BUCKLE SWITCH (DRIVER SIDE) ... 74
LANE DEPARTURE WARNING SYSTEM ................ 75
Precautions for Lane Departure Warning (LDW)
system .................................................................... 75
System Description ................................................. 75
LDW SYSTEM OPERATION ............................... 75
POWER SUPPLY AND GROUND CIRCUIT ....... 77
Action Test .............................................................. 77
LDW SYSTEM RUNNING TEST ......................... 77
Camera Aiming Adjustment .................................... 78
OUTLINE ............................................................. 78
PREPARATION ................................................... 78
TARGET SETTING .............................................. 78
VEHICLE HEIGHT CHECK ................................. 81
AIMING ADJUSTMENT ....................................... 81Component Parts and Harness Connector Location ... 85
Wiring Diagram — LDW — ..................................... 86
Terminals and Reference Value for LDW Camera
Unit .......................................................................... 88
CONSULT-II Function (LDW) .................................. 88
DESCRIPTION .................................................... 88
CONSULT-II BASIC OPERATION ....................... 88
WORK SUPPORT ............................................... 89
SELF-DIAG RESULTS ......................................... 89
DATA MONITOR .................................................. 90
ACTIVE TEST ...................................................... 91
Trouble Diagnosis ................................................... 92
HOW TO PERFORM TROUBLE DIAGNOSIS .... 92
PRELIMINARY INSPECTION .............................. 92
SYMPTOM CHART .............................................. 93
Power Supply and Ground Circuit Inspection ......... 93
DTC [C1B00] CAMERA UNIT MALF ...................... 94
DTC [C1B01] CAM AIMING INCMP ....................... 94
DTC [C1B02] VHCL SPD DATA MALF ................... 94
DTC [C1B03] ABNRML TEMP DETECT ................ 94
DTC [U1000] CAN COMM CIRCUIT ...................... 95
DTC [U1010] CONTROL UNIT (CAN) .................... 95
LDW Chime Circuit Inspection ................................ 95
LDW Switch Circuit Inspection ................................ 96
LDW Indicator Lamp Circuit Inspection ................... 99
Turn Signal Input Inspection .................................100
Electrical Component Inspection ..........................100
LDW SWITCH ....................................................100
Removal and Installation for LDW Camera Unit ...100
REMOVAL ..........................................................100
INSTALLATION ..................................................100
Removal and Installation for LDW Chime .............101
REMOVAL ..........................................................101
INSTALLATION ..................................................101
Removal and Installation for LDW Switch .............101
COMPASS ...............................................................102
Precautions for Compass ......................................102
System Description ...............................................102
Troubleshooting ....................................................103
Zone Variation Setting Procedure .........................104
Calibration Procedure ...........................................104
Wiring Diagram – COMPAS – ...............................105
Removal and Installation of Compass ...................106
CLOCK ....................................................................107
Wiring Diagram — CLOCK — ...............................107
Removal and Installation of Clock .........................108
REMOVAL ..........................................................108
INSTALLATION ..................................................108
CAN COMMUNICATION .........................................109
System Description ...............................................109
CAN Communication Unit .....................................109

COMBINATION METERS
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COMBINATION METERSPFP:24814
System DescriptionNKS003TV
UNIFIED METER CONTROL UNIT

Speedometer, odo/trip meter, tachometer, fuel gauge and water temperature gauge are controlled by the
unified meter control unit, which is built into the combination meter. Unified meter control unit receives sig-
nals from unified meter and A/C amp.

Warning lamp and indicator lamp of combination meter are controlled by signals drawn from the unified
meter and A/C amp.

Digital meter is adopted for odo/trip meter.
NOTE:
The record of the odo meter is kept even if the battery cable is disconnected. The record of the trip meter
is erased when the battery cable is disconnected.

Dot matrix LCD is adopted to display “push engine starter”, “A/T position” and “ICC system* ”.

Odo/trip meter and dot matrix LCD segments can be checked in self-diagnosis mode.

Meters/gauges can be checked in self-diagnosis mode.
*: With ICC system
UNIFIED METER AND A/C AMP.
Refer to DI-28, "COMBINATION METER CONTROL FUNCTION" in “UNIFIED METER AND A/C AMP”.
POWER SUPPLY AND GROUND CIRCUIT
Power is supplied at all times

through 10A fuse [No. 21, located in the fuse block (J/B)]

to combination meter terminal 23,

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

to unified meter and A/C amp. terminal 54.
With the ignition switch in the ACC or ON position, power is supplied

through 10A fuse [No. 6, located in the fuse block (J/B)],

to combination meter terminal 2, and

to unified meter and A/C amp. terminal 41.
With the ignition switch in the ON or START position, power is supplied

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

to combination meter terminal 12,

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

to unified meter and A/C amp. terminal 53.
Ground is supplied

to combination meter terminals 9, 10 and 11

to unified meter and A/C amp. terminals 55 and 71

through grounds M16 and M70.

DI-6
COMBINATION METERS
Revision: 2007 April2007 M35/M45
SPEEDOMETER
The speedometer indicates the vehicle speed.

ABS actuator and electric unit (control unit) converses a pulse signal from wheel sensor to vehicle speed
signal, and transmit vehicle speed signal to unified meter and A/C amp. with CAN communication.

Unified meter and A/C amp. transmits vehicle speed signal to combination meter with communication line.

Combination meter converses vehicle speed signal to the angle signal, and commands to speedometer.
TACHOMETER
The tachometer indicates engine speed in revolutions per minute (rpm).

ECM converses a signal from crankshaft position sensor to engine speed signal, and transmits to unified
meter and A/C amp. with CAN communication.

Unified meter and A/C amp. transmits engine speed signal to combination meter with communication line.

Combination meter converses engine speed signal to the angle signal, and commands to tachometer.
WATER TEMPERATURE GAUGE
The water temperature gauge indicates the engine coolant temperature.

ECM converses a signal from engine coolant temperature sensor to engine coolant temperature signal,
and transmits to unified meter and A/C amp. with CAN communication.

Unified meter and A/C amp. transmits engine coolant temperature signal to combination meter with com-
munication line.

Combination meter converses engine coolant temperature signal to the angle signal, and commands to
water temperature gauge.
PKIC0696E
PKIB7631E
PKIB7632E

COMBINATION METERS
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FUEL GAUGE
The fuel gauge indicates the approximate fuel level in the fuel tank.
The fuel gauge is regulated by a variable ground signal supplied

from unified meter and A/C amp. terminal 58

through the fuel level sensor unit and fuel pump (main) terminals 5 and 2, and

through the fuel level sensor unit (sub) terminals 2 and 1

to unified meter and A/C amp. terminal 42.
Unified meter and A/C amp. provides a fuel level signal to combination meter for fuel gauge with communica-
tion line between unified meter and A/C amp. and combination meter.
ODO/TRIP METER

ABS actuator and electric unit (control unit) converses a pulse signal from wheel sensor to vehicle speed
signal, and transmits vehicle speed signal to unified meter and A/C amp. with CAN communication.

Unified meter and A/C amp. converses vehicle speed signal to 8 pulse signal, and transmits to combina-
tion meter.

Combination meter processes the 8 pulse signal and the memory signals from the meter memory circuit.
Then the mileage is displayed.
How to Change The Display For Odo/trip Meter
Operating the odo/trip meter switch allows switching the mode in the following order.

The odo/trip meter display switching and trip display resetting
can be identified by the time from pressing the odo/trip meter
switch (1) to releasing it.

When resetting with “trip A” displayed, only “trip A” display is
reset. (The same way for “trip B”.)
SEL175W
PKIB7633E

DI-8
COMBINATION METERS
Revision: 2007 April2007 M35/M45
METER ILLUMINATION CONTROL

Meter illumination* is controlled by the unified meter control unit.

Ring illumination under normal operation and engine start excitement function can be turned ON/OFF with
pressing meter illumination control switch for more than 1 second.
*: Illumination for ring, meter face, pointer, dot matrix LCD and odo/trip meter
Daytime Mode
Meter illumination is adjusted to 5 steps by meter illumination control
switch (1) in daytime mode.
Nighttime Mode

Combination meter is transferred to nighttime mode with position light request signal from BCM with CAN
communication.

Meter illumination is adjusted to 16 steps by illumination control
switch (1) in nighttime. Refer to LT- 2 9 3 , "
ILLUMINATION" .
Driver Welcome Function
Ring illumination gradually turns ON when a driver gets in the vehicle with intelligent key and closes the driver
side door.
NOTE:
Ring illumination gradually turns OFF when not turning the ignition switch ON at a certain period of time.
Engine Start Excitement Function
Combination meter detects the engine start when input engine speed signal at first. Pointers of speed meter
and tachometer sweep and ring illumination gradually turns ON when combination meter detects the engine
start. Then, combination meter starts the normal control.
NOTE:

Water temperature gauge and fuel gauge do not function.

Engine start excitement function can be turned ON/OFF with pressing meter illumination control switch for
more than 1 second.
SKIB2623J
SKIB3738E

COMBINATION METERS
DI-15
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Terminals and Reference Value for Combination MeterNKS003U0
Terminal
No.Wire
colorItemCondition
Reference value
(Approx.) Ignition
switchOperation or condition
1LGVehicle speed signal
(8-pulse)ONSpeedometer operated
[When vehicle speed is approx.
40 km/h (25 MPH)]NOTE:
Maximum voltage may be 5 V due
to specifications (connected units).
2 L Ignition switch ACC or ON ACC — Battery voltage
9
B Ground ON — 0 V 10
11
12 BR Ignition switch ON or START ON — Battery voltage
13 R/L Illumination (+) ONLighting switch is turned ON. 12 V
Lighting switch is turned OFF. 0 V
14 B/W Illumination signal input ONLighting switch is turned ON,
and illumination control switch
is operated.<e.g.> When brightness level is
midway
Lighting switch is turned OFF. 0 V
15 RRX communication line (From
unified meter and A/C amp.)ON —
16 GTX communication line (To
unified meter and A/C amp.)ON —
23 W/G Battery power supply OFF — Battery voltage
PKIA1935E
SKIB4733E
SKIA3362E
SKIA3361E

COMBINATION METERS
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Self-Diagnosis Mode of Combination MeterNKS003U2
SELF-DIAGNOSIS FUNCTION

Odo/trip meter segment and dot matrix LCD segment operation can be checked in self-diagnosis mode.

Meters/gauges can be checked in self-diagnosis mode.
OPERATION PROCEDURE
1. Turn ignition switch ON, and switch the odo/trip meter to “trip A” or “trip B”.
NOTE:
If the diagnosis function is activated with “trip A” displayed, the mileage on “trip A” is reset to “0000.0”.
(The same way for “trip B”.)
2. Turn ignition switch OFF.
3. While pressing the odo/trip meter switch (1), turn ignition switch
ON again.
4. Make sure that the trip meter displays “0000.0”.
5. Press the odo/trip meter switch (1) at least 3 times. (Within 7
seconds after the ignition switch is turned ON.)
6. The unified meter control unit is turned to self-diagnosis mode.

Dot in all segments of dot matrix LCD (1) flashes alternately.

All the segments on the odo/trip meter (2) illuminates.

Water temperature gauge and fuel gauge return to zero, and at the same time, low-fuel warning indica-
tor turns ON.
NOTE:

Check combination meter power supply and ground circuit when self-diagnosis mode of combination
meter does not start. Replace combination meter if normal.

If any of the segments is not displayed, replace combination meter.
7. Each meter activates during pressing odo/trip meter switch.
(Then low-fuel warning lamp turns OFF.)
NOTE:
If any of the meter and gages is not activated, replace combina-
tion meter.
PKIB7633E
SKIB2939J
PKIB7636E

DI-20
COMBINATION METERS
Revision: 2007 April2007 M35/M45
Vehicle Speed Signal InspectionNKS003U7
Symptom: Odo/trip meter indication is malfunction.
1. CHECK UNIFIED METER AND A/C AMP. INPUT SIGNAL
1. Connect CONSULT-II, and start engine.
2. Compare the value in “SPEED METER” of “DATA MONITOR” in
“METER A/C AMP” to that in speedometer in the combination
meter during driving.
Is the value in speedometer almost same as that in the monitor?
YES >> Preform self-diagnosis of ABS actuator and electric unit
(control unit). Refer to BRC-23, "
CONSULT-II Functions
(ABS)" .
NO >> GO TO 2.
2. CHECK UNIFIED METER AND A/C AMP. OUTPUT SIGNAL
1. Start engine and drive vehicle at approximately 40 km/h (25
MPH).
2. Check voltage signal between unified meter and A/C amp. har-
ness connector and ground.
NOTE:
Maximum voltage may be 5 V due to specifications (connected units).
OK or NG
OK >> GO TO 3.
NG-1 >> If monitor indicates “0 V” constantly, perform the following.
1. Check each unit inputting vehicle speed signal (8 pulse). Malfunction is caused by short circuit
between each unit and unified meter and A/C amp.
2. Repair or replace malfunctioning parts.
NG-2 >> If monitor indicates “5 V” or “12 V” constantly, replace unified meter and A/C amp.
PKIB7639E
Terminals
Voltage (Approx.) (+)
(–)
Unified meter and
A/C amp.connectorTerminal
M64 28 Ground
PKIB7640E
PKIA1935E