2006 INFINITI M35 ground

EC-1422
[VK45DE]
FUEL INJECTOR
Revision: 2006 January2006 M35/M45
Specification data are reference values and are measured between each terminal and ground.
Pulse signal is measured by CONSULT-II.
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.
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
Diagnostic ProcedureNBS005PY
1. INSPECTION START
Turn ignition switch to START.
Is any cylinder ignited?
Ye s o r N o
Yes (With CONSULT-II)>>GO TO 2.
Yes (Without CONSULT-II)>>GO TO 3.
No >> GO TO 3.
2. CHECK OVERALL FUNCTION
With CONSULT-II
1. Start engine.
2. Perform “POWER BALANCE” in “ACTIVE TEST” mode with
CONSULT-II.
3. Make sure that each circuit produces a momentary engine
speed drop.
OK or NG
OK >>INSPECTION END
NG >> GO TO 3.
TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
21
22
23
40
41
42
44
63W
R/Y
R/B
V/R
P/L
R/W
O
G/YFuel injector No. 5
Fuel injector No. 3
Fuel injector No. 1
Fuel injector No. 6
Fuel injector No. 4
Fuel injector No. 2
Fuel injector No. 7
Fuel injector No. 8[Engine is running]
Warm-up condition
Idle speed
NOTE:
The pulse cycle changes depending on rpm
at idleBATTERY VOLTAGE
(11 - 14V)
[Engine is running]
Warm-up condition
Engine speed: 2,000 rpmBATTERY VOLTAGE
(11 - 14V)
PBIB0042E
PBIB0043E
PBIB0133E

FUEL INJECTOR
EC-1423
[VK45DE]
C
D
E
F
G
H
I
J
K
L
MA
EC
Revision: 2006 January2006 M35/M45
3. CHECK FUNCTION OF FUEL INJECTOR-I
1. Turn ignition switch OFF.
2. Disconnect harness connectors F52, F251 (bank 1) and F51, F271 (bank 2).
3. Turn ignition switch ON.
4. Check voltage between the following;
harness connector F52 terminal 5 and ground,
harness connector F51 terminal 5 and ground
with CONSULT-II or tester.
5. Turn ignition switch OFF.
6. Disconnect ECM harness connector.
7. Check harness continuity between the following terminals.
8. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 5.
NG >> GO TO 4.
: Vehicle front 1. Harness connectors F51, F271 2. Harness connectors F52, F251
Voltage: Battery voltage
Cylinder Harness connector terminal ECM terminal
1 F52 terminal 3 23
3 F52 terminal 2 22
5 F52 terminal 1 21
7 F52 terminal 6 44
2 F51 terminal 3 42
4 F51 terminal 2 41
6 F51 terminal 1 40
8 F51 terminal 6 63
Continuity should exist.
PBIB2723E
PBIB2736E

EC-1424
[VK45DE]
FUEL INJECTOR
Revision: 2006 January2006 M35/M45
4. DETECT MALFUNCTIONING PART
Check the following.
Harness connectors M72, F102
Harness connectors F52, F251
Harness connectors F51, F271
Fuse block (J/B) connector M4
15A fuse
Harness for open or short between harness connector F51 and fuse
Harness for open or short between harness connector F52 and fuse
Harness for open or short between harness connector F51 and ECM
Harness for open or short between harness connector F52 and ECM
>> Repair open circuit or short to ground or short to power in harness or connectors.
5. CHECK FUNCTION OF FUEL INJECTOR-II
Provide battery voltage between the following terminals, and then
interrupt it. Listen to each fuel injector operating sound.
OK or NG
OK >>INSPECTION END
NG >> GO TO 6.
Cylinder Harness connectorterminal
(+) (–)
1
F251 53
32
51
76
2
F271 53
42
61
86
Operating sound should exist.
PBIB2449E

FUEL INJECTOR
EC-1425
[VK45DE]
C
D
E
F
G
H
I
J
K
L
MA
EC
Revision: 2006 January2006 M35/M45
6. CHECK SUB-HARNESS CIRCUIT FOR OPEN AND SHORT
1. Disconnect fuel injector harness connectors.
2. Check harness continuity between the following terminals. 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 FUEL INJECTOR
Refer to EC-1426, "
Component Inspection" .
OK or NG
OK >> GO TO 8.
NG >> Replace fuel injector.
8. CHECK INTERMITTENT INCIDENT
Refer to EC-878, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END
: Vehicle front 1. Fuel injector (bank 2) 2. Fuel injector (bank 1)
Harness connector terminal Fuel injector terminal
F251 terminal 1
2 F251 terminal 2
F251 terminal 3
F251 terminal 6
F251 terminal 5 1
F271 terminal 1
2 F271 terminal 2
F271 terminal 3
F271 terminal 6
F271 terminal 5 1
Continuity should exist.
PBIB2693E

FUEL PUMP
EC-1429
[VK45DE]
C
D
E
F
G
H
I
J
K
L
MA
EC
Revision: 2006 January2006 M35/M45
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 ProcedureNBS005Q4
1. CHECK OVERALL FUNCTION
1. Turn ignition switch ON.
2. Pinch fuel feed hose (1) with two fingers.
Fuel pressure pulsation should be felt on the fuel feed hose
for 1 second after ignition switch is turned ON.
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
COLORITEM CONDITION DATA (DC Voltage)
38 G/RFuel pump control module
(FPCM) check[When cranking engine]Approximately 0V
[Engine is running]
Warm-up condition
Idle speed4 - 6V
39 B/RFuel pump control module
(FPCM)[When cranking engine]0 - 0.5V
[Engine is running]
Warm-up condition
Idle speed8 - 12V
113 GR 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 ONBATTERY VOLTAGE
(11 - 14V)
PBIB2721E
Voltage: Battery voltage
PBIB1187E

EC-1430
[VK45DE]
FUEL PUMP
Revision: 2006 January2006 M35/M45
3. CHECK FUEL PUMP POWER SUPPLY CIRCUIT-II
Check voltage between IPDM E/R terminal 40 and ground with
CONSULT-II or tester.
OK or NG
OK >> GO TO 4.
NG >> GO TO 15.
4. DETECT MALFUNCTIONING PART
Check the following.
Harness connectors E108, M15
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 CONDENSER POWER SUPPLY CIRCUIT-I
1. Turn ignition switch OFF.
2. Reconnect all harness connectors disconnected.
3. Disconnect condenser harness connector.
4. Turn ignition switch ON.
5. Check voltage between condenser terminal 1 and ground with
CONSULT-II 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.Voltage: Battery voltage
PBIB1926E
Voltage: Battery voltage should exist for 1 second
after ignition switch is turned ON.
PBIB0624E

FUEL PUMP
EC-1431
[VK45DE]
C
D
E
F
G
H
I
J
K
L
MA
EC
Revision: 2006 January2006 M35/M45
7. CHECK CONDENSER POWER SUPPLY CIRCUIT-II
1. Disconnect IPDM E/R harness connector E8.
2. Check harness continuity between IPDM E/R terminal 39 and condenser terminal 1.
Refer to Wiring Diagram.
3. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 15.
NG >> GO TO 8.
8. DETECT MALFUNCTIONING PART
Check the following.
Harness connectors E106, B4
IPDM E/R connector E8
Harness for open or short between IPDM E/R and condenser
>> Repair open circuit or short to power in harness or connectors.
9. CHECK CONDENSER GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect dropping resistor harness connector.
3. Check harness continuity between condenser terminal 2 and dropping resistor terminal 2.
Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 10.
NG >> Repair open circuit or short to power in harness or connectors.
10. CHECK CONDENSER
Refer to EC-1433, "
Component Inspection" .
OK or NG
OK >> GO TO 11.
NG >> Replace condenser.Continuity should exist.
: Vehicle front 1. FPCM 2. Dropping resistor
Continuity should exist.
PBIB2708E

EC-1432
[VK45DE]
FUEL PUMP
Revision: 2006 January2006 M35/M45
11 . CHECK FUEL PUMP POWER SUPPLY CIRCUIT-III
1. Turn ignition switch OFF.
2. Disconnect harness connectors E106, B4.
3. Disconnect “fuel level sensor unit and fuel pump” harness con-
nector (1).
–Illustration shows the view with rear seat cushion and inspection
hole cover (RH) removed.
–: Vehicle front
4. Check harness continuity between the following;
harness connector B4 terminal 4 and “fuel level sensor unit and fuel pump” terminal 1,
“fuel level sensor unit and fuel pump” terminal 3 and dropping resistor terminal 2,
dropping resister terminal 1 and ground.
Refer to Wiring Diagram.
OK or NG
OK >> GO TO 13.
NG >> GO TO 12.
12. DETECT MALFUNCTIONING PART
Check the following.
Harness connector B4
Harness connectors B64, B162
Harness for open or short between “fuel level sensor unit and fuel pump” and harness connector B4
Harness for open or short between “fuel level sensor unit and fuel pump” and dropping resistor
Harness for open or short between dropping resistor and ground
>> Repair open circuit or short to power in harness or connectors.
13. CHECK DROPPING RESISTOR
Refer to EC-1433, "
Component Inspection" .
OK or NG
OK >> GO TO 14.
NG >> Replace dropping resistor.
14. CHECK FUEL PUMP
Refer to EC-1433, "
Component Inspection" .
OK or NG
OK >> GO TO 15.
NG >> Replace fuel pump.
PBIB2706E
Continuity should exist.