2006 INFINITI M35 ground

DTC P0643 SENSOR POWER SUPPLY
EC-501
[VQ35DE]
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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.
TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
48 L/BSensor power supply
(EVAP control system pres-
sure sensor)[Ignition switch: ON]Approximately 5V
49 B/YSensor power supply
(Refrigerant pressure sen-
sor, Battery current sensor)[Ignition switch: ON]Approximately 5V
68 L/YSensor power supply
(Power steering pressure
sensor)[Ignition switch: ON]Approximately 5V
82 WSensor ground
(APP sensor 1)[Engine is running]
Warm-up condition
Idle speedApproximately 0V
83 PSensor ground
(APP sensor 2)[Engine is running]
Warm-up condition
Idle speedApproximately 0V
90 LSensor power supply
(APP sensor 1)[Ignition switch: ON]Approximately 5V
91 BRSensor power supply
(APP sensor 2)[Ignition switch: ON]Approximately 5V
98 RAccelerator pedal position
sensor 2[Ignition switch: ON]
Engine stopped
Accelerator pedal: Fully released0.20 - 0.55V
[Ignition switch: ON]
Engine stopped
Accelerator pedal: Fully depressed1.85 - 2.40V
106 LGAccelerator pedal position
sensor 1[Ignition switch: ON]
Engine stopped
Accelerator pedal: Fully released0.4 - 1.1V
[Ignition switch: ON]
Engine stopped
Accelerator pedal: Fully depressed3.7 - 4.8V

EC-502
[VQ35DE]
DTC P0643 SENSOR POWER SUPPLY
Revision: 2006 January2006 M35/M45
Diagnostic ProcedureNBS0052L
1. CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten two ground screws on the body.
Refer to EC-172, "
Ground Inspection" .
OK or NG
OK >> GO TO 2.
NG >> Repair or replace ground connections.
2. CHECK ACCELERATOR PEDAL POSITION SENSOR 1 POWER SUPPLY CIRCUIT
1. Disconnect accelerator pedal position (APP) sensor (1) harness
connector.
2. Turn ignition switch ON.
3. Check voltage between APP sensor terminal 4 and ground with
CONSULT-II or tester.
OK or NG
OK >> GO TO 5.
NG >> GO TO 3.
1. Body ground M70 2. Body ground M16
PBIB2782E
PBIB2704E
Voltage: Approximately 5V
PBIA9606J

DTC P0643 SENSOR POWER SUPPLY
EC-503
[VQ35DE]
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Revision: 2006 January2006 M35/M45
3. CHECK SENSOR POWER SUPPLY CIRCUITS
Check harness for short to power and short to ground, between the following terminals.
OK or NG
OK >> GO TO 4.
NG >> Repair short to ground or short to power in harness or connectors.
4. CHECK COMPONENTS
Check the following.
EVAP control system pressure sensor (Refer to EC-448, "Component Inspection" .)
Refrigerant pressure sensor (Refer to AT C - 9 8 , "COMPONENT INSPECTION" .)
Battery current sensor (Refer to EC-542, "Component Inspection" .)
Power steering pressure sensor (Refer to EC-491, "Component Inspection" .)
OK or NG
OK >> GO TO 7.
NG >> Replace malfunctioning component.
5. CHECK APP SENSOR
Refer to EC-631, "
Component Inspection" .
OK or NG
OK >> GO TO 7.
NG >> GO TO 6.
6. REPLACE ACCELERATOR PEDAL ASSEMBLY
1. Replace accelerator pedal assembly.
2. Perform EC-95, "
Accelerator Pedal Released Position Learning" .
3. Perform EC-95, "
Throttle Valve Closed Position Learning" .
4. Perform EC-96, "
Idle Air Volume Learning" .
>>INSPECTION END
7. CHECK INTERMITTENT INCIDENT
Refer to EC-165, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END
ECM terminal Sensor terminal Reference Wiring Diagram
90 APP sensor terminal 4EC-500
48 EVAP control system pressure sensor terminal 3EC-445
49Refrigerant pressure sensor terminal 1EC-693Battery current sensor terminal 1EC-539
68 PSP sensor terminal 1EC-488

DTC P0850 PNP SWITCH
EC-505
[VQ35DE]
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Revision: 2006 January2006 M35/M45
Overall Function CheckNBS0052Q
Use this procedure to check the overall function of the park/neutral position (PNP) switch circuit. During this
check, a 1st trip DTC might not be confirmed.
WITH GST
1. Turn ignition switch ON.
2. Check voltage between ECM terminal 102 (PNP switch signal)
and ground under the following conditions.
3. If NG, go to EC-507, "
Diagnostic Procedure" .
Position (Selector lever) Voltage (Known good data)
P or N position Approx. 0V
Except above positionBATTERY VOLTAGE
(11 - 14V)
MBIB0043E

DTC P0850 PNP SWITCH
EC-507
[VQ35DE]
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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 ProcedureNBS0052S
1. CHECK DTC WITH TCM
Refer to AT- 4 0 , "
OBD-II Diagnostic Trouble Code (DTC)" .
OK or NG
OK >> GO TO 2.
NG >> Repair or replace.
2. CHECK STARTING SYSTEM
Turn ignition switch OFF, then turn it to START.
Does starter motor operate?
Ye s o r N o
Ye s > > G O T O 3 .
No >> Refer to SC-10, "
STARTING SYSTEM" .
3. CHECK PNP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT-I
1. Turn ignition switch OFF.
2. Disconnect A/T assembly harness connector.
3. Disconnect “unified meter and A/C amp.” harness connector.
4. Check harness continuity between A/T assembly terminal 9 and “unified meter and A/C amp.” terminal 2.
Refer to Wiring Diagram.
5. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 5.
NG >> GO TO 4.
4. DETECT MALFUNCTIONING PART
Check the following.
Harness connectors M72, F102
Harness for open or short between A/T assembly and “unified meter and A/C amp.”
>> Repair open circuit or short to ground or short to power in harness or connectors.
TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
102 G PNP switch[Ignition switch: ON]
Selector lever: P or NApproximately 0V
[Ignition switch: ON]
Selector lever: Except aboveBATTERY VOLTAGE
(11 - 14V)
Continuity should exist.

EC-508
[VQ35DE]
DTC P0850 PNP SWITCH
Revision: 2006 January2006 M35/M45
5. CHECK PNP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT-II
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 102 and “unified meter and A/C amp.” terminal 21.
Refer to Wiring Diagram.
3. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 6.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
6. CHECK PNP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT-III
1. Check harness continuity between A/T assembly terminal 9 and TCM terminal 8.
Refer to AT-108, "
DTC P0615 START SIGNAL CIRCUIT" .
2. 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 INTERMITTENT INCIDENT
Refer to EC-165, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
OK or NG
OK >> GO TO 8.
NG >> Repair or replace.
8. REPLACE “UNIFIED METER AND A/C AMP.”
Refer to DI-28, "
UNIFIED METER AND A/C AMP" .
>>INSPECTION END Continuity should exist.
Continuity should exist.

EC-518
[VQ35DE]
DTC P1217 ENGINE OVER TEMPERATURE
Revision: 2006 January2006 M35/M45
4. CHECK THERMOSTAT
1. Check valve seating condition at normal room temperatures.
It should seat tightly.
2. Check valve opening temperature and valve lift.
3. Check if valve is closed at 5
C (9F) below valve opening tem-
perature.
For details, refer to CO-29, "
WATER INLET AND THERMO-
STAT ASSEMBLY" .
OK or NG
OK >> GO TO 5.
NG >> Replace thermostat
5. CHECK ENGINE COOLANT TEMPERATURE SENSOR
Refer to EC-230, "
Component Inspection" .
OK or NG
OK >> GO TO 6.
NG >> Replace engine coolant temperature sensor.
6. CHECK MAIN 12 CAUSES
If the cause cannot be isolated, go to EC-522, "
Main 12 Causes of Overheating" .
>>INSPECTION END
7. CHECK COOLING FAN CONTROL MODULE POWER SUPPLY CIRCUIT-I
1. Turn ignition switch OFF.
2. Disconnect cooling fan control module (1) harness connector
E42.
–: Vehicle front
–Cooling fan motor-1 harness connector (2)
–Cooling fan motor-2 harness connector (3)
3. Turn ignition switch ON.
4. Check voltage between cooling fan control module terminal 3
and ground with CONSULT-II or tester.
OK or NG
OK >> GO TO 8.
NG >> GO TO 16.Valve opening temperature: 76.5
C (170F) [standard]
Valve lift: More than 8.6 mm/90
C
(0.339 in/194
F)
SLC949A
PBIB2691E
Voltage: Battery voltage
PBIA9509J

DTC P1217 ENGINE OVER TEMPERATURE
EC-519
[VQ35DE]
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Revision: 2006 January2006 M35/M45
8. CHECK COOLING FAN CONTROL MODULE GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check harness continuity between cooling fan control module terminal 1 and ground.
Refer to wiring diagram.
3. Also check harness for short to power.
OK or NG
OK >> GO TO 9.
NG >> Repair open circuit or short to power in harness or connectors.
9. CHECK IPDM E/R GROUND CIRCUIT
1. Disconnect IPDM E/R harness connector E8, E9.
2. Check harness continuity between IPDM E/R terminal 38, 51 and ground.
Refer to wiring diagram.
3. 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 COOLING FAN CONTROL SIGNAL CIRCUIT
1. Check harness continuity between IPDM E/R terminal 59 and cooling fan control module terminal 2.
Refer to wiring diagram.
2. Also check harness for short to ground and short to power.
OK or NG
OK (Models with sub harness)>>GO TO 11.
OK (Models without sub harness)>>GO TO 14.
NG >> Repair open circuit or short to ground or short to power in harness or connectors. Continuity should exist.
Continuity should exist.
Continuity should exist.