2006 INFINITI M35 combination meter

COMBINATION METERS
DI-25
C
D
E
F
G
H
I
J
L
MA
B
DI
Revision: 2006 January2006 M35/M45
Fuel Gauge Pointer Fluctuates, Indicator Wrong Value or VariesNKS003UB
1. CHECK FUEL GAUGE FLUCTUATION
Test drive vehicle to see if gauge fluctuates only during driving or at the instant of stopping.
Does the indication value vary only during driving or at the instant of stopping?
YES >> The pointer fluctuation may be caused by fuel level change in the fuel tank. Condition is normal.
NO >> Ask the customer about the situation when the symptom occurs in detail, and perform the trouble
diagnosis.
Fuel Gauge Does Not Move to FULL PositionNKS003UC
1. QUESTION 1
Does it take a long time for the pointer to move to FULL position?
YES >> GO TO 2.
NO >> GO TO 3.
2. QUESTION 2
Was the vehicle fueled with the ignition switch ON?
YES >> Be sure to fuel the vehicle with the ignition switch OFF. Otherwise, it will take a long time to move
to FULL position because of the characteristic of the fuel gauge.
NO >> GO TO 3.
3. QUESTION 3
Is the vehicle parked on an incline?
YES >> Check the fuel level indication with vehicle on a level surface.
NO >> GO TO 4.
4. QUESTION 4
During driving, does the fuel gauge pointer move gradually toward EMPTY position?
YES >> Check the fuel level sensor unit. Refer to DI-26, "CHECK FUEL LEVEL SENSOR UNIT" .
NO >> The float arm may interfere or bind with any of the components in the fuel tank.

DI-26
COMBINATION METERS
Revision: 2006 January2006 M35/M45
Electrical Components InspectionNKS003UD
CHECK FUEL LEVEL SENSOR UNIT
For removal, refer to FL-4, "FUEL LEVEL SENSOR UNIT, FUEL FILTER AND FUEL PUMP ASSEMBLY" .
Check Fuel Level Sensor Unit and Fuel Pump (Main)
Check resistance between terminals 2 and 5.
*1 and *2: When float rod is in contact with stopper.
If the results of check are NG, check the fuel level sensor unit
and fuel pump (main) harness. Refer to DI-26, "
Check Fuel
Level Sensor Unit and Pump (Main) Harness" .
Check Fuel Level Sensor Unit and Pump (Main) Harness
Check continuity at following terminals.
If the results of check are NG, replace fuel pump assembly. If the
results of check are OK, replace fuel level sensor unit.
Check Fuel Level Sensor Unit (Sub)
Check resistance between terminals 1 and 2.
*1 and *2: When float rod is in contact with stopper.Terminal Float position [mm (in)] Resistance value [
]
25*1 Full 210 (8.27) Approx. 3
*2 Empty 30 (1.18) Approx. 80
SKIB3550J
Terminal Continuity
2 - Signal terminal (A)
Ye s
5 - Ground terminal (B)
SKIB3551J
Terminal Float position [mm (in)]Resistance
value []
12*1 Full 9 (0.35) Approx. 3
*2 Empty 179 (7.05) Approx. 43
SKIB2678J

COMBINATION METERS
DI-27
C
D
E
F
G
H
I
J
L
MA
B
DI
Revision: 2006 January2006 M35/M45
Removal and Installation of Combination MeterNKS003UE
REMOVAL
1. Remove cluster lid A. Refer to IP-10, "INSTRUMENT PANEL
ASSEMBLY" .
2. Remove the screws (A) using power tools, and pull out combina-
tion meter (1).
3. Disconnect connector, and remove combination meter (1).
INSTALLATION
Installation is the reverse order of removal.
Disassembly and Assembly of Combination MeterNKS003UF
DISASSEMBLY
Disengage tabs to separate front cover.
ASSEMBLY
Assembly is the reverse order of disassembly.
SKIB4957E
SKIB2952J
1. Front cover
2. Unified meter control unit

DI-28
UNIFIED METER AND A/C AMP
Revision: 2006 January2006 M35/M45
UNIFIED METER AND A/C AMPPFP:27760
System DescriptionNKS003UG
For the unified meter and A/C amp., the signal required for controlling the combination meter are integrated in
the A/C auto amp.
COMBINATION METER CONTROL FUNCTION
Unified meter and A/C amp. inputs necessary information for combination meter from each unit with CAN
communication and so on.
Unified meter and A/C amp. outputs signals with communication line (TX, RX) between unified meter and
A/C amp. and combination meter.
Unified meter and A/C amp. corresponds a CONSULT-II function (self-diagnostic results, CAN diagnostic
support monitor and data monitor).
Input/output Signals
Between unified meter and A/C amp. and combination meter.
Unit Input from combination meter Output to combination meter
Unified meter and A/C amp.
Refuel status signal
Low-fuel warning lamp condition signal
Delivery destination data signal
Combination meter receive error signal
Combination meter specifications signal
Odo date signal
Vehicle speed signal
Turn indicator signal
High beam request signal
Ring illumination request signal
Position light request signal
Front fog lamp request signal
SET indicator lamp signal
CRUISE indicator lamp signal
Engine speed signal
Fuel level sensor signal (resistance value)
Engine coolant temperature signal
CAN communication condition signal of A/T
A/T position indicator signal
Manual mode indicator signal
A/T CHECK warning lamp signal
AWD warning lamp signal
Low tire pressure warning lamp signal
VDC OFF indicator lamp signal
SLIP indicator lamp signal
ABS warning lamp signal
Brake warning lamp signal
Malfunction indicator lamp signal
Oil pressure switch signal
Door switch signal
Buzzer request signal
ICC warning lamp signal
Meter display signal
AFS OFF indicator signal

DI-32
UNIFIED METER AND A/C AMP
Revision: 2006 January2006 M35/M45
4. Select “SELF-DIAG RESULTS”, “CAN DIAG SUPPORT MNTR”
or “DATA MONITOR”.
SELF-DIAG RESULTS
Operation Procedure
1. Touch “SELF-DIAG RESULTS” on “SELECT DIAG MODE” screen.
2. Self-diagnosis results are displayed.
Display Item List
NOTE:
“TIME” means the following.
0: Means detected malfunction at present. (From malfunction detection to turning ignition switch OFF)
1-63: Means detected malfunction in past. (Displays number of ignition switch OFF ON after detecting
malfunction. “Self-diagnosis result” is erased when exceeding “63”.)
BCIA0031E
SKIA4956E
Display item [Code] Malfunction is detected when...Reference
page
CAN COMM CIRC
[U1000]Malfunction is detected in CAN communication.
CAUTION:
Even when there is no malfunction on CAN communication system, malfunction may be
misinterpreted when battery has low voltage (when maintaining 7 - 8 V for about 2 sec-
onds) or 10A fuse [No. 19, located in the fuse block (J/B)] is disconnected.DI-36
METER COMM CIRC
[B2202]Malfunction is detected in communication between combination meter and unified meter and
A/C amp.DI-36
VEHICLE SPEED
CIRC
[B2205]When an erroneous speed signal is input for 1 seconds.
CAUTION:
Even when there is no malfunction on speed signal system, malfunction may be misin-
terpreted when battery has low voltage (when maintaining 7 - 8 V for about 2 seconds). DI-36

DI-36
UNIFIED METER AND A/C AMP
Revision: 2006 January2006 M35/M45
DTC [U1000] CAN Communication CircuitNKS003UK
Symptom: Displays “CAN COMM CIRC [U1000]” as a self-diagnosis results of unified meter and A/C amp.
1. CHECK CAN COMMUNICATION
1. Select “SELF-DIAG RESULTS” mode for “METER A/C AMP” with CONSULT-II.
2. Print out CONSULT-II screen.
>> Go to “LAN system”. Refer to LAN-7, "
Precautions When Using CONSULT-II" .
DTC [B2202] Meter Communication CircuitNKS003UL
Symptom: Displays “METER COMM CIRC [B2202]” as a self-diagnosis results of unified meter and A/C amp.
1. CHECK CONNECTOR
Check combination meter, unified meter and A/C amp. and terminals (combination meter side, unified meter
and A/C amp. side, and harness side) for looseness or bent.
OK or NG
OK >> GO TO 2.
NG >> Repair terminal or connector.
2. CHECK CONTINUITY COMMUNICATION CIRCUIT (TX: UNIFIED METER AND A/C AMP.)
1. Turn ignition switch OFF.
2. Disconnect combination meter connector and unified meter and A/C amp. connector.
3. Check continuity between combination meter harness connector
(A) and unified meter and A/C amp. harness connector (B).
4. Check continuity between combination meter harness connector
(A) and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair harness or connector.
AB
Continuity
Connector Terminal Connector Terminal
M52 15 M64 7 Yes
A
GroundContinuity
Connector Terminal
M52 15 No
PKIB7647E

UNIFIED METER AND A/C AMP
DI-37
C
D
E
F
G
H
I
J
L
MA
B
DI
Revision: 2006 January2006 M35/M45
3. CHECK CONTINUITY COMMUNICATION CIRCUIT (RX: UNIFIED METER AND A/C AMP.)
1. Check continuity between combination meter harness connector
(A) and unified meter and A/C amp. harness connector (B).
2. Check continuity between combination meter harness connector
(A) and ground.
OK or NG
OK >> GO TO 4.
NG >> Repair harness or connector.
4. CHECK COMBINATION METER OUTPUT VOLTAGE (TX: UNIFIED METER AND A/C AMP.)
1. Connect combination meter connector.
2. Turn ignition switch ON.
3. Check voltage between combination meter harness connector
and ground.
OK or NG
OK >> GO TO 5.
NG >> Replace combination meter.
AB
Continuity
Connector Terminal Connector Terminal
M52 16 M64 27 Yes
A
GroundContinuity
Connector Terminal
M52 16 No
PKIB7648E
Terminals
Voltage (Approx.) (+)
(–)
Combination meter
connectorTerminal
M52 15 Ground 5 V
PKIB7649E

DI-38
UNIFIED METER AND A/C AMP
Revision: 2006 January2006 M35/M45
5. CHECK COMMUNICATION SIGNAL (TX: UNIFIED METER AND A/C AMP.)
1. Turn ignition switch OFF.
2. Connect unified meter and A/C amp. connector.
3. Turn ignition switch ON.
4. Check voltage signal between combination meter harness con-
nector and ground.
OK or NG
OK >> GO TO 6.
NG >> Replace unified meter and A/C amp.
6. CHECK UNIFIED METER AND A/C AMP OUTPUT VOLTAGE (RX: UNIFIED METER AND A/C AMP.)
1. Turn ignition switch OFF.
2. Disconnect combination meter connector.
3. Turn ignition switch ON.
4. Check voltage between unified meter and A/C amp. harness
connector and ground.
OK or NG
OK >> GO TO 7.
NG >> Replace unified meter and A/C amp.
Terminals
Voltage (Approx.) (+)
(–)
Combination meter
connectorTerminal
M52 15 Ground
PKIB7650E
SKIA3362E
Terminals
Voltage (Approx.) (+)
(–)
Unified meter and A/C
amp. connectorTerminal
M64 27 Ground 5 V
PKIB7651E