2008 INFINITI FX35 ignition

FUEL PUMPEC-1155
< SERVICE INFORMATION > [VK45DE]
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FUEL PUMP
DescriptionINFOID:0000000001327057
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 EC M stops pump operation and prevents battery discharging,
thereby improving safety. The ECM does not directly dr ive 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.
CONSULT-III Reference Val ue in Data Monitor ModeINFOID:0000000001327058
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 cranking Operates.
When engine is stopped Stops in 1.5 seconds.
Except as shown above Sto ps .
PBIB1508E
MONITOR ITEM CONDITION SPECIFICATION
FUEL PUMP RLY  For 1 seconds after turning ignition switch: ON
 Engine running or cranking
ON
 Except above OFF
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FUEL PUMPEC-1157
< SERVICE INFORMATION > [VK45DE]
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Diagnosis ProcedureINFOID:0000000001327060
1.CHECK OVERALL FUNCTION
1. Turn ignition switch ON.
2. Pinch fuel feed hose (1) with two fingers.
OK or NG
OK >> INSPECTION END
NG >> GO TO 2.
2.CHECK FUEL PUMP POWER SUPPLY CIRCUIT-I
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Turn ignition switch ON.
4. Check voltage between ECM terminal 113 and ground with CONSULT-III or tester.
OK or NG
OK >> GO TO 5.
NG >> GO TO 3.
3.CHECK FUEL PUMP POWER SUPPLY CIRCUIT-II
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R harness connector E8.
3. Turn ignition switch ON.
4. Check voltage between IPDM E/R terminal 40 and ground with CONSULT-III or tester.
OK or NG
OK >> GO TO 4.
NG >> GO TO 11.
TER- MI-
NAL
NO. WIRE
COLOR ITEM CONDITION DATA (DC Voltage)
11 3 G Y / R F u e l p u m p r e l a y [Ignition switch: ON]
 For 1 second after turning ignition switch ON
[Engine is running]
0 - 1.5V
[Ignition switch: ON]
 More than 1 second after turning ignition switch ON BATTERY VOLTAGE
(11 - 14V)
Fuel pressure pulsation should
be felt on the fuel feed
hose for 1 second after ignition switch is turned ON.
PBIB3245E
Voltage: Battery voltage
PBIB1187E
Voltage: Battery voltage
PBIB1926E
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3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

EC-1158
< SERVICE INFORMATION >[VK45DE]
FUEL PUMP
4.DETECT MALFUNCTIONING PART
Check the following.
 Harness connectors E211, M41
 Harness for open or short between IPDM E/R and ECM
>> Repair open circuit or short to ground or short to power in harness or connectors.
5.CHECK FUEL PUMP POWER SUPPLY CIRCUIT-III
1. Turn ignition switch OFF.
2. Reconnect all harness connectors disconnected.
3. Disconnect “fuel level sensor unit and fuel pump” harness con- nector.
4. Turn ignition switch ON.
5. Check voltage between “fuel level sensor unit and fuel pump”
terminal 1 and ground with CONSULT-III or tester.
OK or NG
OK >> GO TO 9.
NG >> GO TO 6.
6.CHECK 15A FUSE
1. Turn ignition switch OFF.
2. Disconnect 15A fuse.
3. Check 15A fuse.
OK or NG
OK >> GO TO 7.
NG >> Replace fuse.
7.CHECK FUEL PUMP POWER SUPPLY CIRCUIT-IV
1. Disconnect IPDM E/R harness connector E8.
2. Check harness continuity between IPDM E/R terminal 39 and “fuel level sensor unit and fuel pump” termi-
nal 1.
Refer to Wiring Diagram.
3. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 11.
NG >> GO TO 8.
8.DETECT MALFUNCTIONING PART
Check the following.
 Harness connectors E206, B6
PBIB1507E
Voltage: Battery voltage should exist for 1 sec- ond after ignition switch is turned ON.
PBIB0795E
Continuity should exist.
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EC-1160
< SERVICE INFORMATION >[VK45DE]
ICC BRAKE SWITCH
ICC BRAKE SWITCH
Component DescriptionINFOID:0000000001327063
When depress on the brake pedal, ICC brake switch is turned OFF
and stop lamp switch is turned ON. ECM detects the state of the
brake pedal by this input of two kinds (ON/OFF signal)
Refer to
ACS-7
for the ICC function.
CONSULT-III Reference Value in Data Monitor ModeINFOID:0000000001327064
Specification data are reference values.
PBIB2558E
MONITOR ITEM CONDITION SPECIFICATION
BRAKE SW1
(ICC brake switch)  Ignition switch: ON Brake pedal: Fully released ON
Brake pedal: Slightly depressed OFF
BRAKE SW2
(Stop lamp switch)  Ignition switch: ON Brake pedal: Fully released OFF
Brake pedal: Slightly depressed ON
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EC-1162
< SERVICE INFORMATION >[VK45DE]
ICC BRAKE SWITCH
Diagnosis Procedure
INFOID:0000000001327066
1.CHECK OVERALL FUNCTION-I
With CONSULT-III
1. Turn ignition switch ON.
2. Select “BRAKE SW1” in “DATA MONITOR” mode with CON- SULT-III.
3. Check “BRAKE SW1” indication under the following conditions.
Without CONSULT-III
1. Turn ignition switch ON.
2. Check voltage between ECM terminal 108 and ground under the following conditions.
OK or NG
OK >> INSPECTION END
NG >> GO TO 2.
2.CHECK DTC WITH ICC UNIT
Refer to ACS-35
.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace.
3.CHECK ICC BRAKE SWITCH CIRCUIT
1. Turn ignition switch OFF.
TER- MI-
NAL
NO. WIRE
COLOR ITEM CONDITION DATA (DC Voltage)
101 P/L Stop lamp switch [Ignition switch: OFF]
 Brake pedal: Fully released
Approximately 0V
[Ignition switch: OFF]
 Brake pedal: Slightly depressed BATTERY VOLTAGE
(11 - 14V)
108 SB ICC brake switch [Ignition switch: ON]
 Brake pedal: Slightly depressed
Approximately 0V
[Ignition switch: ON]
 Brake pedal: Fully released BATTERY VOLTAGE
(11 - 14V)
CONDITION INDICATION
Brake pedal: Slightly depressed OFF
Brake pedal: Fully released ON
SEC011D
CONDITION VOLTAGE
Brake pedal: Slightly depressed Approximately 0V
Brake pedal: Fully released Battery voltage
MBIB0061E
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ICC BRAKE SWITCHEC-1163
< SERVICE INFORMATION > [VK45DE]
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2. Disconnect ICC brake hold relay.
3. Turn ignition switch ON.
4. Check voltage between ICC brake hold relay terminal 3 and
ground with CONSULT-III or tester.
OK or NG
OK >> GO TO 8.
NG >> GO TO 4.
4.CHECK ICC BRAKE SWITCH POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect ICC brake switch harness connector.
3. Turn ignition switch ON.
4. Check voltage between ICC brake switch terminal 1 and ground with CONSULT-III or tester.
OK or NG
OK >> GO TO 6.
NG >> GO TO 5.
5.DETECT MALFUNCTIONING PART
Check the following.
 Fuse block (J/B) connector M201
 10A fuse
 Harness for open or short between ICC brake switch and fuse
>> Repair open circuit or short to ground or short to power in harness or connectors.
PBIB1531E
Voltage: Battery voltage
PBIB1538E
PBIB2558E
Voltage: Battery voltage
PBIB0857E
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3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

EC-1164
< SERVICE INFORMATION >[VK45DE]
ICC BRAKE SWITCH
6.CHECK ICC BRAKE SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT-I
1. Turn ignition switch OFF.
2. Check harness continuity between ICC brake hold rela y terminal 3 and ICC brake switch terminal 2.
Refer to Wiring Diagram.
3. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 7.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
7.CHECK ICC BRAKE SWITCH
Refer to EC-1164, "
Component Inspection".
OK or NG
OK >> GO TO 11.
NG >> Replace ICC brake switch.
8.CHECK ICC BRAKE SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT-II
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between ICC brake hold relay terminal 4 and ECM terminal 108. Refer Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 10.
NG >> GO TO 9.
9.DETECT MALFUNCTIONING PART
Check the following.
 Harness connectors E211, M41
 Harness for open or short between ICC brake hold relay and ECM
>> Repair open circuit or short to ground or short to power in harness or connectors.
10.CHECK ICC BRAKE HOLD RELAY
Refer to EC-1164, "
Component Inspection".
OK >> GO TO 11.
NG >> Replace ICC brake fold relay.
11 .CHECK INTERMITTENT INCIDENT
Refer to EC-717
.
>> INSPECTION END
Component InspectionINFOID:0000000001327067
ICC BRAKE SWITCH
1. Turn ignition switch OFF.
2. Disconnect ICC brake switch harness connector. Continuity should exist.
Continuity should exist.
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

EC-1166
< SERVICE INFORMATION >[VK45DE]
IGNITION SIGNAL
IGNITION SIGNAL
Component DescriptionINFOID:0000000001327068
IGNITION COIL & POWER TRANSISTOR
The ignition signal from the ECM is sent to and amplifi
ed by the power transistor. The power transistor turns
ON and OFF the ignition coil primary circuit. This ON/O FF operation induces the proper high voltage in the coil
secondary circuit.
: Vehicle front 1. Ignition coil
(With power transistor)
(Bank 2)2. Ignition coil
(With power transistor)
(Bank 1)
PBIB3234E
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