2009 NISSAN LATIO ignition

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COMBINATION METERS
Component Parts and Har ness Connector Location INFOID:0000000004306996
System Description INFOID:0000000004306997
UNIFIED METER CONTROL UNIT • Speedometer, odo/trip meter, tachometer and fuel gauge are controlled by the unified meter control unit,
which is built into the combination meter.
• Warning and indicator lamps are controlled by signal s drawn from the CAN communication system, BCM
(body control module), and components connected directly to the combination meter.
• Odo/trip meter and A/T indicator (with A/T) or CVT i ndicator (with CVT) segments can be checked in self-
diagnosis mode.
• Meters/gauges can be checked in self-diagnosis mode.
POWER SUPPLY AND GROUND CIRCUIT Power is supplied at all times
• through 10A fuse [No. 13, located in the fuse block (J/B)]
• to combination meter terminal 27.
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 28.
Ground is supplied
• to combination meter terminals 21, 22 and 23
• through grounds M57 and M61. 1. Combination meter M24 2. ECM E16 3. ABS actuator and electric unit (con-
trol unit) E33
4. Fuel level sensor unit and fuel pump (fuel level sensor) B100 (view with
rear seat and inspection hole cover
removed)
( ⇐ : Front) 5. Vehicle speed sensor F41 (A/T
shown, M/T similar) 6. TCM E31 (view with
instrument low-
er finisher removed)

System Description " .
17 G Washer fluid level switch
(Canada models) ONWasher fluid level low 0
Washer fluid level normal Battery voltage
21 B Ground — — 0
22
23
24 V Fuel level sensor ground (-) ON — 0
26 B Vehicle speed sensor ground
(without ABS or CVT) ON — 0
27 G Battery power supply OFF — Battery voltage
28 SB Ignition switch ON or START ON — Battery voltage
29 GR Seat belt buckle switch RH ON Unfastened (ON) 0
Fastened (OFF) Battery voltage
30 G Stop lamp switch ON Brake pedal depressed Battery voltage
Brake pedal released 0
31 V A/T N-range input (with A/T) ON Transmission gear selector lever
in N position Battery voltage
Transmission gear selector lever
other than N position 0
32 W A/T P-range input (with A/T) ON Transmission gear selector lever
in P position Battery voltage
Transmission gear selector lever
other than P position 0
33 Y A/T PN output (with A/T) ON Transmission gear selector lever
in P or N position 0
Transmission gear selector lever
other than P or N position Battery voltage
35 BR Engine coolant temperature
signal output ONAt idle [after warming up, approx.
80 °C (176 °F)]
NOTE:
The waveforms vary depending
on engine coolant temperature.
38 L Generator ON Generator voltage low 0
Generator voltage normal Battery voltage
Ter-
mi-
nal
No. Wire
color Item Condition
Reference value (V)
(Approx.)
Ignition
switch Operation or condition

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If the diagnosis function is activat
ed with “trip A” displayed, the mileage on “trip A” will indicate “0000.0”,
but the actual trip mileage will be retained. (The same applies for “trip B”.)
2. Turn ignition switch OFF.
3. While pushing the odo/trip meter switch (1), turn the ignition switch ON.
4. Confirm that the trip meter displays “0000.0”.
5. Push the odo/trip meter switch at least 3 times. (Within 7 sec- onds after the ignition switch is turned ON.)
6. All the segments on the odo/trip meter, and simultaneously the low-fuel warning lamp indicator illumi- nates. At this time, the unified meter cont rol unit is turned to self-diagnosis mode.
• M/T MODELS (1)
• A/T AND CVT MODELS (2)
NOTE:
• Check combination meter power supply and ground circuit when self-diagnosis mode of combination
meter does not start. Replace combi nation meter if normal. Refer to IP-12, " Removal and Installation " .
• If any of the segments is not displayed, replace combination meter. Refer to IP-12, " Removal and Instal-
lation " .
7. Each meter activates while pressing odo/trip meter switch. (At this time, the low-fuel warning lamp turns off, low water temperature indicator lamp and high water temperature warning lamp turn on.)
NOTE:
If any of the meter and gages are not activat ed, replace combination meter. Refer to IP-12, " Removal and
Installation " .

Power Supply and
Ground Circuit Inspection " .
" CONSULT-III Function (METER/M&A) " .
Self - diagnostic results content
No malfunction detected>> Refer to
DI-14, " Symptom Chart " .
Malfunction detected>> Refer to DI-12, " CONSULT-III Function (METER/M&A) " .
Symptom Chart INFOID:0000000004307006
Power Supply and Ground Circuit Inspection INFOID:0000000004307007OK >> GO TO 2.
NG >> Be sure to eliminate cause of malfunction before installing new fuse. Refer to PG-3 .
OK >> GO TO 3.
NG >> Repair harness or connector. Vehicle Speed Signal Inspection " .
Improper tachometer indication. Refer to DI-16, " Engine Speed Signal Inspection " .
Improper fuel gauge indication. Refer to DI-16, " Fuel Level Sensor Signal Inspection " .
Low-fuel warning lamp indication is irregular.
Improper A/T position indication. Refer to DI-35, " A/T Indicator Does Not Illuminate " .
Improper CVT position indication. Refer to DI-40, " CVT Indicator Does Not Illuminate " .
Power source Fuse No.
Battery 13
Ignition switch ON or START 14 Terminals Ignition switch position
(+) (–) OFF ON
Combination meter
connector Terminal
M24 27
Ground Battery voltage Battery voltage
28 0 V Battery voltage

OK >> Check harness or connector between combination meter and vehicle speed sensor.
NG >> Replace vehicle speed sensor.
WITH CVT, WITHOUT ABS OK >> Perform TCM self-diagnosis. Refer to
CVT-230, " CONSULT-III Function (TRANSMISSION) " .
NG >> Replace combination meter. Refer to IP-12, " Removal and Installation " .
Engine Speed Signal Inspection INFOID:0000000004307009
Symptom: Improper tachometer indication. OK >> Perform ECM self-diagnosis. Refer to
EC-604, " CONSULT-III Function (ENGINE) " with (MR
TYPE 1), EC-1116, " CONSULT-III Function (ENGINE) " (MR TYPE 2) or
EC-103, " CONSULT-III
Function " (HR16DE).
NG >> Replace combination meter. Refer to IP-12, " Removal and Installation " .
Fuel Level Sensor Signal Inspection INFOID:0000000004307010
Symptom:
• Improper fuel gauge indication.
• Low-fuel warning lamp indication is irregular.
NOTE:
The following symptoms do not indicate a malfunction.
• Depending on vehicle position or driving circumstance, the fuel level in the tank shifts and the indication may
fluctuate.
• If the vehicle is fueled with the ignition switch ON, the indication will update slowly.
• If the vehicle is tilted when the ignition switch is turned ON, fuel in the tank may flow to one direction result-
ing in a change of reading.

Electrical Component Inspection " .
OK or NG OK >> Check fuel level sensor unit installation, and c
heck whether the float arm interferes or binds with
any of the internal components in the fuel tank. Repair or replace malfunctioning part, if neces-
sary.
NG >> Replace fuel level sensor unit.
Fuel Gauge Fluctuat es, Indicates Wrong Value, or Varies INFOID:0000000004307011YES >> 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 Mo ve to Full-position INFOID:0000000004307012YES >> GO TO 2.
NO >> GO TO 3. 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 c haracteristic of the fuel gauge.
NO >> GO TO 3. YES >> Check the fuel level indication with vehicle on a level surface.
NO >> GO TO 4. YES >> Check the components. Refer to
DI-19, " Electrical Component Inspection " .
NO >> The float arm may interfere or bind with any of the components in the fuel tank.
DTC [U1000] CAN Communication Circuit INFOID:0000000004307013
Symptom: Display CAN COMM CIRC [U1000] at the re sult of self-diagnosis for combination meter. Trouble Diagnosis Flow Chart " .

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Oil Pressure Warning Lamp Stay
s Off (Ignition Switch ON) INFOID:0000000004307018 Auto Active Test " .
Does oil pressure warning lamp blink? YES >> GO TO 2.
NO >> GO TO 5.

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• through 10A fuse [No. 8, located in the fuse block (J/B)]
• to BCM terminal 57,
• through 10A fuse [No. 13, located in the fuse block (J/B)]
• to combination meter terminal 27.
With ignition switch in the ON or START position, power is supplied
• through 10A fuse [No. 6, located in the fuse block (J/B)]
• to BCM terminal 38,
• through 10A fuse [No. 3, located in the fuse block (J/B)]
• to combination meter terminal 28.
Ground is supplied
• to BCM terminal 67 and
• to combination meter terminals 21, 22 and 23
• through grounds M57 and M61.
IGNITION KEY WARNING CHIME (WITHOUT INTELLIGENT KEY) With the key inserted into the key switch, and the igni tion switch in the OFF or ACC position, when driver's
door is opened, the warning chime will sound.
• BCM detects key inserted into the ignition switch, and sends key warning signal to combination meter with CAN communication line.
• 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 key switch, and the igniti on switch in the LOCK or ACC position, when driver's
door is opened, the warning chime will sound.
• BCM detects key inserted into the ignition switch, and sends key warning signal to combination meter with CAN communication line.
• When combination meter receives key warning signal, it sounds warning chime.
When Intelligent Key Is Carried With The Driver
Refer to BL-88, " System Description " .
LIGHT WARNING CHIME The warning chime sounds, when driver's door is opened (door switch ON) with lighting switch ON and the
ignition switch is in any position other than ON or START.
NOTE:
BCM detected lighting switch in the 1st or 2nd position, refer to LT-62, " Combination Switch Reading Func-
tion " .
• BCM detects headlamps are illuminated, and sends li ght warning signal to combination meter with CAN
communication lines. WKIA5464E