2006 INFINITI M35 fuel system

DTC P1220 FUEL PUMP CONTROL MODULE (FPCM)
EC-525
[VQ35DE]
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Revision: 2006 January2006 M35/M45
DTC P1220 FUEL PUMP CONTROL MODULE (FPCM)PFP:17001
DescriptionNBS0053A
SYSTEM DESCRIPTION
*: ECM determines the start signal status by the signals of engine speed and battery voltage.
This system controls the fuel pump operation. The amount of fuel flow delivered from the fuel pump is altered
between two flow rates by the FPCM operation. The FPCM determines the voltage supplied to the fuel pump
(and therefore fuel flow) according to the following conditions.
COMPONENT DESCRIPTION
The FPCM adjusts the voltage supplied to the fuel pump to control
the amount of fuel flow. When the FPCM increases the voltage sup-
plied to the fuel pump, the fuel flow is increased. When the FPCM
decreases the voltage, the fuel flow is decreased.
CONSULT-II Reference Value in Data Monitor ModeNBS0053B
Specification data are reference values.
On Board Diagnosis LogicNBS0053C
Sensor Input Signal to ECM ECM function Actuator
Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)Engine speed*
Fuel pump controlFuel pump control module
(FPCM) Mass air flow sensor Amount of intake air
Engine coolant temperature sensor Engine coolant temperature
Battery Battery voltage*
Conditions Amount of fuel flow Supplied voltage
Engine cranking
Engine coolant temperature is below 10C (50F).
Engine is running under heavy load and high speed conditionshighBattery voltage
(11 - 14V)
Except the above low Approximately 8V
SEF387X
MONITOR ITEM CONDITION SPECIFICATION
FPCM
Engine: Cranking HI
Engine: Idle
Engine coolant temperature: More than 10C (50F)LOW
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1220
1220Fuel pump control module
(FPCM)An improper voltage signal from the FPCM, which
is supplied to a point between the fuel pump and
the dropping resistor, is detected by ECM.
Harness or connectors
(FPCM circuit is shorted.)
Dropping resistor
FPCM

EC-662
[VQ35DE]
DTC P2A00, P2A03 A/F SENSOR 1
Revision: 2006 January2006 M35/M45
4. CLEAR THE SELF-LEARNING DATA
With CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Select “SELF-LEARNING CONT” in “WORK SUPPORT” mode with CONSULT- I I .
3. Clear the self-learning control coefficient by touching “CLEAR”.
4. Run engine for at least 10 minutes at idle speed.
Is the 1st trip DTC P0171, P0172, P0174 or P0175 detected?
Is it difficult to start engine?
Without CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Turn ignition switch OFF.
3. Disconnect mass air flow sensor (1) harness connector.
4. Restart engine and let it idle for at least 5 seconds.
5. Stop engine and reconnect mass air flow sensor harness con-
nector.
6. Make sure DTC P0102 is displayed.
7. Erase the DTC memory. Refer to EC-67, "
HOW TO ERASE
EMISSION-RELATED DIAGNOSTIC INFORMATION" .
8. Make sure DTC P0000 is displayed.
9. Run engine for at least 10 minutes at idle speed.
Is the 1st trip DTC P0171, P0172, P0174 or P0175 detected?
Is it difficult to start engine?
Ye s o r N o
Yes >> Perform trouble diagnosis for DTC P0171, P0174 or P0172, P0175. Refer to EC-321, "DTC
P0171, P0174 FUEL INJECTION SYSTEM FUNCTION" or EC-332, "DTC P0172, P0175 FUEL
INJECTION SYSTEM FUNCTION" .
No >> GO TO 5.
SEF968Y
PBIB2783E

DTC P2A00, P2A03 A/F SENSOR 1
EC-665
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Revision: 2006 January2006 M35/M45
11 . REPLACE AIR FUEL RATIO (A/F) SENSOR 1
Replace air fuel ratio (A/F) sensor 1.
CAUTION:
Discard any A/F sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto a
hard surface such as a concrete floor; use a new one.
Before installing new A/F sensor, clean exhaust system threads using Oxygen Sensor Thread
Cleaner tool J-43897-18 or J-43897-12 and approved anti-seize lubricant.
>>INSPECTION END
Removal and InstallationNBS0057N
AIR FUEL RATIO (A/F) SENSOR 1
Refer to EM-26, "EXHAUST MANIFOLD" .

FUEL PUMP
EC-685
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Revision: 2006 January2006 M35/M45
FUEL PUMPPFP:17042
DescriptionNBS0057Z
SYSTEM DESCRIPTION
*: ECM determines the start signal status by the signals of engine speed and battery voltage.
The ECM activates the fuel pump for several seconds after the ignition switch is turned ON to improve engine
startability. If the ECM receives a engine speed signal from the camshaft position sensor (PHASE), it knows
that the engine is rotating, and causes the pump to operate. If the engine speed signal is not received when
the ignition switch is ON, the engine stalls. The ECM stops pump operation and prevents battery discharging,
thereby improving safety. The ECM does not directly drive the fuel pump. It controls the ON/OFF fuel pump
relay, which in turn controls the fuel pump.
COMPONENT DESCRIPTION
A turbine type design fuel pump is used in the fuel tank.
Fuel level sensor unit and fuel pump (1)
Fuel pressure regulator (2)
Fuel tank temperature sensor (3)
CONSULT-II Reference Value in Data Monitor ModeNBS00580
Specification data are reference values.
Sensor Input signal to ECM ECM Function Actuator
Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)Engine speed*
Fuel pump control Fuel pump relay
Battery Battery voltage*
Condition Fuel pump operation
Ignition switch is turned to ON. Operates for 1 second.
Engine running and crankingOperates.
When engine is stoppedStops in 1.5 seconds.
Except as shown aboveStops.
PBIB2707E
MONITOR ITEM CONDITION SPECIFICATION
FUEL PUMP RLY
For 1 seconds after turning ignition switch: ON
Engine running or crankingON
Except above OFF

EC-728
[VK45DE]
INDEX FOR DTC
Revision: 2006 January2006 M35/M45
P0452 0452 EVAP SYS PRES SENEC-1163
P0453 0453 EVAP SYS PRES SENEC-1170
P0455 0455 EVAP GROSS LEAKEC-1178
P0456 0456 EVAP VERY SML LEAKEC-1185
P0460 0460 FUEL LEV SEN SLOSHEC-1194
P0461 0461 FUEL LEVEL SENSOREC-1196
P0462 0462 FUEL LEVL SEN/CIRCEC-1198
P0463 0463 FUEL LEVL SEN/CIRCEC-1198
P0500 0500
VEH SPEED SEN/CIRC*5EC-1200
P0506 0506 ISC SYSTEMEC-1202
P0507 0507 ISC SYSTEMEC-1204
P0550 0550 PW ST P SEN/CIRCEC-1206
P0603 0603 ECM BACK UP/CIRCUITEC-1211
P0605 0605 ECMEC-1215
P0643 0643 SENSOR POWER/CIRCEC-1218
P0700 0700 TCMAT- 11 2
P0705 0705 PNP SW/CIRCAT- 11 3
P0710 0710 ATF TEMP SEN/CIRCAT-135
P0717 0717 TURBINE SENSORAT- 11 7
P0720 0720
VEH SPD SEN/CIR AT*5AT- 11 9
P0740 0740 TCC SOLENOID/CIRCAT-126
P0744 0744 A/T TCC S/V FNCTNAT-128
P0745 0745 L/PRESS SOL/CIRCAT-130
P0850 0850 P-N POS SW/CIRCUITEC-1223
P1140 1140 INTK TIM S/CIRC-B1EC-1228
P1145 1145 INTK TIM S/CIRC-B2EC-1228
P1148 1148 CLOSED LOOP-B1EC-1236
P1168 1168 CLOSED LOOP-B2EC-1236
P1211 1211 TCS C/U FUNCTNEC-1237
P1212 1212 TCS/CIRCEC-1238
P1217 1217 ENG OVER TEMPEC-1239
P1220 1220 FPCM/CIRCUITEC-1251
P1225 1225 CTP LEARNINGEC-1259
P1226 1226 CTP LEARNINGEC-1261
P1550 1550 BAT CURRENT SENSOREC-1263
P1551 1551 BAT CURRENT SENSOREC-1269
P1552 1552 BAT CURRENT SENSOREC-1269
P1553 1553 BAT CURRENT SENSOREC-1275
P1554 1554 BAT CURRENT SENSOREC-1281
P1564 1564 ASCD SWEC-1287 (Models with ICC)
EC-1294
(Models with ASCD)
P1568 1568
ICC COMMAND VALUE*
6EC-1301
DTC*1
Items
(CONSULT-II screen terms)Reference page
CONSULT-II
GST*
2ECM*3

EC-732
[VK45DE]
INDEX FOR DTC
Revision: 2006 January2006 M35/M45
FUEL LEV SEN SLOSH P0460 0460EC-1194
FUEL SYS-LEAN-B1 P0171 0171EC-1044
FUEL SYS-LEAN-B2 P0174 0174EC-1044
FUEL SYS-RICH-B1 P0172 0172EC-1055
FUEL SYS-RICH-B2 P0175 0175EC-1055
HLR/C SOL/CIRC P1767 1767AT-159
HLR/C SOL FNCTN P1769 1769AT-161
HO2S2 HTR (B1) P0037 0037EC-911
HO2S2 HTR (B1) P0038 0038EC-911
HO2S2 HTR (B2) P0057 0057EC-911
HO2S2 HTR (B2) P0058 0058EC-911
HO2S2 (B1) P0137 0137EC-1009
HO2S2 (B1) P0138 0138EC-1020
HO2S2 (B1) P0139 0139EC-1033
HO2S2 (B2) P0157 0157EC-1009
HO2S2 (B2) P0158 0158EC-1020
HO2S2 (B2) P0159 0159EC-1033
I/C SOLENOID/CIRC P1752 1752AT-147
I/C SOLENOID FNCTN P1754 1754AT-149
IAT SEN/CIRCUIT P0112 0112EC-943
IAT SEN/CIRCUIT P0113 0113EC-943
IAT SENSOR P0127 0127EC-964
ICC COMMAND VALUE*6P1568 1568EC-1301
INT/V TIM CONT-B1 P0011 0011EC-891
INT/V TIM CONT-B2 P0021 0021EC-891
INT/V TIM V/CIR-B1 P0075 0075EC-920
INT/V TIM V/CIR-B2 P0081 0081EC-920
INTK TIM S/CIRC-B1 P1140 1140EC-1228
INTK TIM S/CIRC-B2 P1145 1145EC-1228
IN PULY SPEED P1715 1715EC-1323
ISC SYSTEM P0506 0506EC-1202
ISC SYSTEM P0507 0507EC-1204
KNOCK SEN/CIRC-B1 P0327 0327EC-1094
KNOCK SEN/CIRC-B1 P0328 0328EC-1094
KNOCK SEN/CIRC-B2 P0332 0332EC-1094
KNOCK SEN/CIRC-B2 P0333 0333EC-1094
L/PRESS SOL/CIRC P0745 0745AT-130
LC/B SOLENOID/CIRC P1772 1772AT-163
LC/B SOLENOID FNCT P1774 1774AT-165
MAF SEN/CIRCUIT P0101 0101EC-927
MAF SEN/CIRCUIT P0102 0102EC-936
MAF SEN/CIRCUIT P0103 0103EC-936
Items
(CONSULT-II screen terms)DTC*
1
Reference page
CONSULT-II
GST*
2ECM*3

EC-734
[VK45DE]
PRECAUTIONS
Revision: 2006 January2006 M35/M45
PRECAUTIONSPFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
NBS0059C
The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SRS and SB section of this Service Man-
ual.
WAR NING :
To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death
in the event of a collision which would result in air bag inflation, all maintenance must be per-
formed by an authorized NISSAN/INFINITI dealer.
Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air
Bag Module, see the SRS section.
Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or
harness connectors.
Precautions for Procedures without Cowl Top CoverNBS0059D
When performing the procedure after removing cowl top cover, cover
the lower end of windshield with urethane, etc.
On Board Diagnostic (OBD) System of Engine and A/TNBS0059E
The ECM has an on board diagnostic system. It will light up the malfunction indicator lamp (MIL) to warn the
driver of a malfunction causing emission deterioration.
CAUTION:
Be sure to turn the ignition switch OFF and disconnect the negative battery cable before any
repair or inspection work. The open/short circuit of related switches, sensors, solenoid valves,
etc. will cause the MIL to light up.
Be sure to connect and lock the connectors securely after work. A loose (unlocked) connector will
cause the MIL to light up due to the open circuit. (Be sure the connector is free from water, grease,
dirt, bent terminals, etc.)
Certain systems and components, especially those related to OBD, may use a new style slide-
locking type harness connector. For description and how to disconnect, refer to PG-102, "
HAR-
NESS CONNECTOR" .
Be sure to route and secure the harnesses properly after work. The interference of the harness
with a bracket, etc. may cause the MIL to light up due to the short circuit.
Be sure to connect rubber tubes properly after work. A misconnected or disconnected rubber tube
may cause the MIL to light up due to the malfunction of the EVAP system or fuel injection system,
etc.
Be sure to erase the unnecessary malfunction information (repairs completed) from the ECM and
TCM (Transmission control module) before returning the vehicle to the customer.
PIIB3706J

PRECAUTIONS
EC-737
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Revision: 2006 January2006 M35/M45
Do not operate fuel pump when there is no fuel in lines.
–Fuel level sensor unit and fuel pump (1)
–Fuel pressure regulator (2)
–Fuel tank temperature sensor (3)
Tighten fuel hose clamps to the specified torque.
Do not depress accelerator pedal when starting.
Immediately after starting, do not rev up engine unneces-
sarily.
Do not rev up engine just prior to shutdown.
When installing C.B. ham radio or a mobile phone, be sure
to observe the following as it may adversely affect elec-
tronic control systems depending on installation location.
–Keep the antenna as far as possible from the electronic
control units.
–Keep the antenna feeder line more than 20 cm (8 in) away
from the harness of electronic controls.
Do not let them run parallel for a long distance.
–Adjust the antenna and feeder line so that the standing-
wave radio can be kept smaller.
–Be sure to ground the radio to vehicle body.
PBIB2707E
SEF709Y
SEF708Y