2006 INFINITI M35 ground

DTC P1217 ENGINE OVER TEMPERATURE
EC-1247
[VK45DE]
C
D
E
F
G
H
I
J
K
L
MA
EC
Revision: 2006 January2006 M35/M45
11 . CHECK COOLING FAN MOTOR CIRCUIT-I
1. Turn ignition switch OFF.
2. Disconnect cooling fan control module harness connectors E301, E303.
3. Check harness continuity between the following;
Cooling fan motor-1 terminal 1, 2 and cooling fan control module terminal 4,
Cooling fan motor-1 terminal 3, 4 and cooling fan control module terminal 5,
Cooling fan motor-2 terminal 1, 2 and cooling fan control module terminal 6,
Cooling fan motor-2 terminal 3, 4 and cooling fan control module terminal 7.
Refer to wiring diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> Replace cooling fan control module.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
12. CHECK COOLING FAN MOTOR CIRCUIT-II
1. Turn ignition switch OFF.
2. Disconnect cooling fan control module harness connectors E301, E303.
3. Check harness continuity between the following;
Cooling fan motor-1 terminal 1, 2 and cooling fan control module terminal 4,
Cooling fan motor-1 terminal 3, 4 and cooling fan control module terminal 5,
Cooling fan motor-2 terminal 1, 2 and cooling fan control module terminal 6,
Cooling fan motor-2 terminal 3, 4 and cooling fan control module terminal 7.
Refer to wiring diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 14.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
13. CHECK COOLING FAN CONTROL MODULE OUTPUT SIGNAL CIRCUIT
1. Reconnect all harness connectors disconnected.
2. Disconnect cooling fan control module harness connectors E301, E303.
3. Turn ignition switch ON.
4. Check voltage between cooling fan control module terminals 4,
6 and ground with CONSULT-II or tester.
OK or NG
OK >> GO TO 14.
NG >> Replace cooling fan control module.
14. CHECK COOLING FAN MOTORS -1 AND -2
Refer to EC-1249, "
Component Inspection" .
OK or NG
OK >> GO TO 19.
NG >> Replace cooling fan motor.Continuity should exist.
Continuity should exist.
Voltage: Battery voltage
PBID0261J

EC-1248
[VK45DE]
DTC P1217 ENGINE OVER TEMPERATURE
Revision: 2006 January2006 M35/M45
15. CHECK COOLING FAN CONTROL MODULE POWER SUPPLY CIRCUIT-II
1. Turn ignition switch OFF.
2. Disconnect cooling fan relay harness connector.
3. Turn ignition switch ON.
4. Check voltage between cooling fan relay terminals 1, 3 and
ground with CONSULT-II or tester.
OK or NG
OK >> GO TO 17.
NG >> GO TO 16.
16. DETECT MALFUNCTIONING PART
Check the following.
10A fuse
Fuse block (J/B) connector E102
50A fusible link
Harness for open or short between cooling fan relay and fuse
Harness for open or short between cooling fan relay and battery
>> Repair open circuit or short to ground or short to power in harness or connectors.
17. CHECK COOLING FAN CONTROL MODULE POWER SUPPLY CIRCUIT-III
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R harness connector E9.
3. Check harness continuity between the following;
Cooling fan relay terminal 2 and IPDM E/R terminal 56,
Cooling fan relay terminal 5 and cooling fan control module terminal 3.
Refer to wiring diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 18.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
18. CHECK COOLING FAN RELAY
Refer to EC-1249, "
Component Inspection" .
OK or NG
OK >> GO TO 19.
NG >> Replace cooling fan relay.Voltage: Battery voltage
PBIA9511J
Continuity should exist.

EC-1254
[VK45DE]
DTC P1220 FUEL PUMP CONTROL MODULE (FPCM)
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 ProcedureNBS005L3
1. CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten two ground screws on the body.
Refer to EC-885, "
Ground Inspection" .
OK or NG
OK >> GO TO 2.
NG >> Repair or replace ground connections.
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)
1. Body ground M70 2. Body ground M16
PBIB2782E

DTC P1220 FUEL PUMP CONTROL MODULE (FPCM)
EC-1255
[VK45DE]
C
D
E
F
G
H
I
J
K
L
MA
EC
Revision: 2006 January2006 M35/M45
2. CHECK FPCM POWER SUPPLY CIRCUIT
1. Disconnect fuel pump control module (FPCM) harness connector.
2. Turn ignition switch ON.
3. Check voltage between FPCM terminal 2 and ground with CON-
SULT-II or tester.
OK or NG
OK >> GO TO 4.
NG >> GO TO 3.
3. DETECT MALFUNCTIONING PART
Check the following.
Harness connectors E106, B4
Harness for open or short between FPCM and harness connector B4
>> Repair open circuit or short to ground or short to power in harness or connectors.
4. CHECK FPCM GROUND CIRCUIT-I FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Check harness continuity between FPCM terminal 3 and ground.
Refer to Wiring Diagram.
3. Also check harness for short to power.
OK or NG
OK >> GO TO 5.
NG >> Repair open circuit or short to power in harness or connectors.
: Vehicle front 1. FPCM 2. Dropping resistor
Voltage: Battery voltage
PBIB2708E
PBIB0099E
Continuity should exist.

EC-1256
[VK45DE]
DTC P1220 FUEL PUMP CONTROL MODULE (FPCM)
Revision: 2006 January2006 M35/M45
5. CHECK FPCM GROUND CIRCUIT-II FOR OPEN AND SHORT
1. 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
2. Disconnect dropping resistor harness connector.
3. Check harness continuity between the following;
“fuel level sensor unit and fuel pump” terminal 3 and dropping resistor terminal 2,
FPCM terminal 4 and dropping resister terminal 2.
Refer to Wiring Diagram.
4. Check harness continuity between the following;
“fuel level sensor and fuel pump” terminal 3 and ground,
FPCM terminal 4 and ground.
Refer to Wiring Diagram.
5. Also check harness for short to power.
OK or NG
OK >> GO TO 7.
NG >> GO TO 6.
6. DETECT MALFUNCTIONING PART
Check the following.
Harness connectors B162, B64
Harness for open or short between “fuel level sensor unit and fuel pump” and dropping resistor
Harness for open or short between FPCM and dropping resistor
Harness for open or short between “fuel level sensor unit and fuel pump” and ground
Harness for open or short between FPCM and ground
>> Repair open circuit or short to ground or short to power in harness or connectors.
PBIB2706E
: Vehicle front 1. FPCM 2. Dropping resistor
Continuity should exist.
Continuity should not exist.
PBIB2708E

DTC P1220 FUEL PUMP CONTROL MODULE (FPCM)
EC-1257
[VK45DE]
C
D
E
F
G
H
I
J
K
L
MA
EC
Revision: 2006 January2006 M35/M45
7. CHECK FPCM INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 38 and FPCM terminal 4.
Refer to Wiring Diagram.
3. Check harness continuity between ECM terminal 38 and ground.
Refer to Wiring Diagram.
4. Also check harness for short to power.
OK or NG
OK >> GO TO 9.
NG >> GO TO 8.
8. DETECT MALFUNCTIONING PART
Check the following.
Harness connectors B2, M13
Harness connectors M72, F102
Harness for open or short between ECM and FPCM
>> Repair open circuit or short to ground or short to power in harness or connectors.
9. CHECK FPCM OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM terminal 39 and FPCM terminal 1.
Refer to Wiring Diagram.
2. 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 B2, M13
Harness connectors M72, F102
Harness for open or short between ECM and FPCM
>> Repair open circuit or short to ground or short to power in harness or connectors.
11 . CHECK FPCM
Refer to EC-1258, "
Component Inspection" .
OK or NG
OK >> GO TO 12.
NG >> Replace FPCM.Continuity should exist.
Continuity should not exist.
Continuity should exist.

EC-1258
[VK45DE]
DTC P1220 FUEL PUMP CONTROL MODULE (FPCM)
Revision: 2006 January2006 M35/M45
12. CHECK INTERMITTENT INCIDENT
Refer to EC-878, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END
Component InspectionNBS005L4
FUEL PUMP CONTROL MODULE
1. Start engine and warm it up to normal operating temperature.
2. Turn ignition switch OFF and wait at least 10 seconds.
3. Check voltage between FPCM terminal 4 and ground under the
following conditions.
4. If NG, replace fuel pump control module.
: Vehicle front 1. FPCM 2. Dropping resistor
Condition Voltage
When engine cranking Approx. 0V
After starting engine Approx. 5V
PBIB2708E
PBIB0101E

DTC P1550 BATTERY CURRENT SENSOR
EC-1263
[VK45DE]
C
D
E
F
G
H
I
J
K
L
MA
EC
Revision: 2006 January2006 M35/M45
DTC P1550 BATTERY CURRENT SENSORPFP:294G0
Component DescriptionNBS005LF
The power generation voltage variable control enables fuel con-
sumption to be decreased by reducing the engine load which is
caused by the power generation of the generator. The battery cur-
rent sensor (1) is installed to the battery cable at the negative termi-
nal. The sensor measures the charging/discharging current of the
battery. Based on the sensor signal, ECM judges whether or not the
power generation voltage variable control is performed. When per-
forming the power generation voltage variable control, ECM calcu-
lates the target power generation voltage based on the sensor
signal. And ECM sends the calculated value as the power genera-
tion command value to IPDM E/R. For the details of the power gen-
eration voltage variable control, refer to SC section.
CAUTION:
Do not connect the electrical component or the ground wire directly to the battery terminal. The con-
nection causes the malfunction of the power generation voltage variable control, and then the battery
discharge may occur.
CONSULT-II Reference Value in Data Monitor ModeNBS005LG
Specification data are reference values.
*: Before measuring the terminal voltage, confirm that the battery is fully charged. Refer to SC-5, "SPECIFIC GRAVITY CHECK" .
On Board Diagnosis LogicNBS005LH
The MIL will not light up for this diagnosis.
NOTE:
If DTC P1550 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643. Refer to
EC-1218, "
DTC P0643 SENSOR POWER SUPPLY" .
PBIB2685E
MONITOR ITEM CONDITION SPECIFICATION
BAT CUR SEN
Engine speed: Idle
Battery: Fully charged*
Selector lever: P or N
Air conditioner switch: OFF
No loadApprox. 2,600 - 3,500mV
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1550
1550Battery current sensor circuit
range/performanceThe output voltage of the battery current
sensor remains within the specified
range while engine is running.
Harness or connectors
(The sensor circuit is open or shorted.)
Battery current sensor