2006 INFINITI FX35 ignition switch

FUEL PUMP EC-635
[VQ35DE]
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Revision: 2006 December 2006 FX35/FX45
FUEL PUMPPFP:17042
DescriptionNBS003ZK
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
start ability. 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.
CONSULT-II Reference Value in Data Monitor ModeNBS003ZL
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 Stops.
PBIB1569E
MONITOR ITEM CONDITION SPECIFICATION
FUEL PUMP RLY

For 1 second after turning ignition switch ON

Engine running or cranking ON

Except above conditions OFF

FUEL PUMP EC-637
[VQ35DE]
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Revision: 2006 December 2006 FX35/FX45
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.
Diagnostic ProcedureNBS003ZN
1. CHECK OVERALL FUNCTION
1. Turn ignition switch ON.
2. Pinch fuel feed hose 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-II or tester.
OK or NG
OK >> GO TO 5.
NG >> GO TO 3.
TER-
MINAL NO. WIRE
COLOR ITEM CONDITION DATA (DC Voltage)
113 GY/R Fuel pump relay [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.
PBIB1612E
Voltage: Battery voltage
PBIB1187E

EC-638
[VQ35DE]
FUEL PUMP
Revision: 2006 December 2006 FX35/FX45
3. CHECK FUEL PUMP POWER SUPPLY CIRCUIT-II
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R harness connector E8.
3. Check harness continuity between IPDM E/R terminal 40 and ECM terminal 113. Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 11.
NG >> GO TO 4.
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-II or tester.
OK or NG
OK >> GO TO 9.
NG >> GO TO 6. Continuity should exist.
PBIB1572E
Voltage: Battery voltage should exist for 1 second
after ignition switch is turned ON.
PBIB0795E

FUEL PUMP EC-639
[VQ35DE]
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Revision: 2006 December 2006 FX35/FX45
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

Harness for open or short between IPDM E/R and “fuel level sensor unit and fuel pump”
>> Repair open circuit or short to ground or short to power in harness or connectors.
9. CHECK FUEL PUMP GROUND CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between “fuel level sensor unit and fuel pump” terminal 3 and ground. Refer to Wiring Diagram.
2. Also check harness for short to power.
OK or NG
OK >> GO TO 10.
NG >> Repair open circuit or short to power in harness or connectors.
10. CHECK FUEL PUMP
Refer to EC-1319, "
Component Inspection" .
OK or NG
OK >> GO TO 11.
NG >> Replace “fuel level sensor unit and fuel pump”.
11 . CHECK INTERMITTENT INCIDENT
Refer to EC-811, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
OK or NG
OK >> Replace IPDM E/R. Refer to PG-17, "IPDM E/R (INTELLIGENT POWER DISTRIBUTION MOD-
ULE ENGINE ROOM)"
NG >> Repair or replace harness or connectors. Continuity should exist.
Continuity should exist.

ICC BRAKE SWITCH EC-641
[VQ35DE]
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Revision: 2006 December 2006 FX35/FX45
ICC BRAKE SWITCHPFP:25320
Component DescriptionNBS003ZX
When the brake pedal is depressed, 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-6, "
DESCRIPTION" for the ICC function.
CONSULT-II Reference Value in Data Monitor ModeNBS003ZY
Specification data are reference values.
PBIB1539E
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

ICC BRAKE SWITCH EC-643
[VQ35DE]
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Revision: 2006 December 2006 FX35/FX45
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.
Diagnostic ProcedureNBS00400
1. CHECK OVERALL FUNCTION-I
With CONSULT-II
1. Turn ignition switch ON.
2. Select “BRAKE SW1” in “DATA MONITOR” mode with CON- SULT-II.
3. Check “BRAKE SW1” indication under the following conditions.
Without CONSULT-II
1. Turn ignition switch ON.
2. Check voltage between ECM terminal 108 and ground under the following conditions.
OK or NG
OK >> GO TO 2.
NG >> GO TO 3.
TERMI-
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

ICC BRAKE SWITCH EC-645
[VQ35DE]
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Revision: 2006 December 2006 FX35/FX45
4. CHECK ICC BRAKE SWITCH CIRCUIT
1. Turn ignition switch OFF.
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-II or tester.
OK or NG
OK >> GO TO 9.
NG >> GO TO 5.
5. 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-II or tester.
OK or NG
OK >> GO TO 7.
NG >> GO TO 6.
PBIB1531E
Voltage: Battery voltage
PBIB1538E
PBIB1539E
Voltage: Battery voltage
PBIB0857E

EC-646
[VQ35DE]
ICC BRAKE SWITCH
Revision: 2006 December 2006 FX35/FX45
6. DETECT MALFUNCTIONING PART
Check the following.

Fuse block (J/B) connector E201

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.
7. 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 relay 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 8.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
8. CHECK ICC BRAKE SWITCH
Refer to EC-648, "
Component Inspection" .
OK or NG
OK >> GO TO 17.
NG >> Replace ICC brake switch.
9. 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 11.
NG >> GO TO 10.
10. 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.
11 . CHECK ICC BRAKE HOLD RELAY
Refer to EC-648, "
Component Inspection" .
OK >> GO TO 17.
NG >> Replace ICC brake fold relay. Continuity should exist.
Continuity should exist.