2007 NISSAN 350Z steering

EC-504
DTC P0550 PSP SENSOR
Revision: 2006 November2007 350Z
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)
60 R/LSensor power supply
[Camshaft position sensor
(PHASE) (bank 1), Exhaust
valve timing control position
sensor (bank 1), Power
steering pressure sensor][Ignition switch: ON]5V
87 YPower steering pressure
sensor[Engine is running]

Steering wheel: Being turned0.5 - 4.5V
[Engine is running]

Steering wheel: Not being turned0.4 - 0.8V
96 P/LSensor ground
[Camshaft position sensor
(PHASE) (bank 1), Power
steering pressure sensor][Engine is running]

Warm-up condition

Idle speed0V

EC-506
DTC P0550 PSP SENSOR
Revision: 2006 November2007 350Z
2. CHECK PSP SENSOR POWER SUPPLY CIRCUIT
1. Disconnect power steering pressure (PNP) sensor (1) harness
connector.
2. Turn ignition switch ON.
3. Check voltage between PSP sensor terminal 1 and ground with
CONSULT-III or tester.
OK or NG
OK >> GO TO 3.
NG >> Repair open circuit or short to ground or short to power
in harness or connectors.
3. CHECK PSP SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between PSP sensor terminal 3 and ECM terminal 96.
Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 4.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
4. CHECK PSP SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM terminal 87 and PSP sensor terminal 2.
Refer to Wiring Diagram.
2. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 5.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
5. CHECK PSP SENSOR
Refer to EC-507, "
Component Inspection" .
OK or NG
OK >> GO TO 6.
NG >> Replace PNP sensor.
1 : Alternator
: Vehicle front
PBIB3511E
Voltage: Approximately 5V
PBIB0188E
Continuity should exist.
Continuity should exist.

DTC P0550 PSP SENSOR
EC-507
C
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F
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MA
EC
Revision: 2006 November2007 350Z
6. CHECK INTERMITTENT INCIDENT
Refer to EC-141, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END
Component InspectionNBS000B0
POWER STEERING PRESSURE SENSOR
1. Reconnect all harness connectors disconnected.
2. Start engine and let it idle.
3. Check voltage between ECM terminal 87 and ground under the
following conditions.
Removal and InstallationNBS000B1
POWER STEERING PRESSURE SENSOR
Refer to PS-33, "HYDRAULIC LINE" .
Condition Voltage
Steering wheel: Being turned 0.5 - 4.5V
Steering wheel: Not being turned 0.4 - 0.8V
PBIB3575E

EC-514
DTC P0643 SENSOR POWER SUPPLY
Revision: 2006 November2007 350Z
DTC P0643 SENSOR POWER SUPPLYPFP:18919
On Board Diagnosis LogicNBS000DW
This self-diagnosis has the one trip detection logic.
FAIL-SAFE MODE
When the malfunction is detected, ECM enters fail-safe mode and the MIL lights up.
DTC Confirmation ProcedureNBS000DX
NOTE:
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 8V at idle.
WITH CONSULT-III
1. Start engine and let it idle for 1 second.
2. Check DTC.
3. If DTC is detected, go to EC-517, "
Diagnostic Procedure" .
WITH GST
Follow the procedure “WITH CONSULT-III” above.
DTC No.Trouble diagnosis
nameDTC detecting condition Possible cause
P0643
0643Sensor power supply
circuit shortECM detects a voltage of power
source for sensor is excessively
low or high.

Harness or connectors
(APP sensor 1 circuit is shorted.)
(TP sensor circuit is shorted.)
[CMP sensor (PHASE) (bank 1) circuit is shorted.]
[EVT control position sensor (bank 1) circuit is shorted.]
(PSP sensor circuit is shorted.)

Accelerator pedal position sensor

Throttle position sensor

Camshaft position sensor (PHASE) (bank 1)

Exhaust valve timing control position sensor (bank 1)

Power steering pressure sensor
Engine operation condition in fail-safe mode
ECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed opening (approx. 5 degrees) by the return
spring.

EC-516
DTC P0643 SENSOR POWER SUPPLY
Revision: 2006 November2007 350Z
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)
43 OR/LSensor power supply
[Throttle position sensor
(bank 2)][Ignition switch: ON]5V
44 BSensor power supply
[Throttle position sensor
(bank 1)][Ignition switch: ON]5V
60 R/LSensor power supply
[Camshaft position sensor
(PHASE) (bank 1), Exhaust
valve timing control position
sensor (bank 1), Power
steering pressure sensor][Ignition switch: ON]5V
97 RAccelerator pedal position
sensor 1[Ignition switch: ON]

Engine stopped

Accelerator pedal: Fully released0.5 - 1.0V
[Ignition switch: ON]

Engine stopped

Accelerator pedal: Fully depressed3.9 - 4.7V
98 SBAccelerator pedal position
sensor 2[Ignition switch: ON]

Engine stopped

Accelerator pedal: Fully released0.15 - 0.60V
[Ignition switch: ON]

Engine stopped

Accelerator pedal: Fully depressed1.95 - 2.40V
99 LSensor power supply
(Accelerator pedal position
sensor 1)[Ignition switch: ON]5V
100 WSensor ground
(Accelerator pedal position
sensor 1)[Engine is running]

Warm-up condition

Idle speed0V
103 GSensor power supply
(Accelerator pedal position
sensor 2)[Ignition switch: ON]5V
104 GYSensor ground
(Accelerator pedal position
sensor 2)[Engine is running]

Warm-up condition

Idle speed0V

EC-518
DTC P0643 SENSOR POWER SUPPLY
Revision: 2006 November2007 350Z
2. CHECK ACCELERATOR PEDAL POSITION SENSOR 1 POWER SUPPLY CIRCUIT-I
1. Disconnect accelerator pedal position (APP) sensor harness
connector.
2. Turn ignition switch ON.
3. Check voltage between APP sensor terminal 6 and ground with
CONSULT-III or tester.
OK or NG
OK >> GO TO 7.
NG >> GO TO 3.
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.

Camshaft position senosr (PHASE) (bank 1) (Refer to EC-405, "Component Inspection" .)

Exhaust valve timing control position sensor (bank 1) (Refer to EC-539, "Component Inspection" .)

Power steering pressure sensor (Refer to EC-507, "Component Inspection" .)
OK or NG
OK >> GO TO 5.
NG >> Replace malfunctioning component.
PBIB1080E
Voltage: Approximately 5V
PBIB0914E
ECM terminal Sensor terminal Reference Wiring Diagram
43 Electric throttle control actuator (bank 2) terminal 6EC-365
44 Electric throttle control actuator (bank 1) terminal 6EC-363
60CMP sensor (PHASE) (bank 1) terminal 1EC-397EVT control position sensor (bank 1) terminal 1EC-530
PSP sensor terminal 1EC-503
99 APP sensor terminal 6EC-515

DTC P1078 P1084 EVT CONTROL POSITION SENSOR
EC-531
C
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MA
EC
Revision: 2006 November2007 350Z
Specification data are reference values and are measured between each terminal and ground.
Pulse signal is measured by CONSULT-III.
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.)TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
58 Y/GExhaust valve timing control
position sensor (bank 1)[Engine is running]

Warm-up condition

Idle speed
NOTE:
The pulse cycle changes depending on rpm at
idle.4.0 - 5.0V
[Engine is running]

Warm-up condition

Engine speed: 2,000 rpm4.0 - 5.0V
60 R/LSensor power supply
[Camshaft position sensor
(PHASE) (bank 1), Exhaust
valve timing control position
sensor (bank 1), Power
steering pressure sensor][Ignition switch: ON]5V
88 LG/BSensor ground
[Exhaust valve timing con-
trol position sensor (bank 1),
Exhaust valve timing control
position sensor (bank 2)][Engine is running]

Warm-up condition

Idle speed0V
PBIB3551E
PBIB3552E

EC-602
DTC P1564 ASCD STEERING SWITCH
Revision: 2006 November2007 350Z
DTC P1564 ASCD STEERING SWITCHPFP:25551
Component DescriptionNBS000FT
ASCD steering switch has variant values of electrical resistance for each button. ECM reads voltage variation
of switch, and determines which button is operated.
Refer to EC-30, "
AUTOMATIC SPEED CONTROL DEVICE (ASCD)" for the ASCD function.
CONSULT-III Reference Value in Data Monitor ModeNBS000FU
Specification data are reference values.
On Board Diagnosis LogicNBS000FV

This self-diagnosis has the one trip detection logic.

The MIL will not light up for this self-diagnosis.
NOTE:
If DTC P1564 is displayed with DTC P0605, first perform the trouble diagnosis for DTC P0605.
Refer to EC-512, "
DTC P0605 ECM".
1. ASCD steering switch 2. RESUME/ACCELERATE switch 3. SET/COAST switch
4. CANCEL switch 5. MAIN switch
PBIB3497E
MONITOR ITEM CONDITION SPECIFICATION
MAIN SW

Ignition switch: ONMAIN switch: Pressed ON
MAIN switch: Released OFF
CANCEL SW

Ignition switch: ONCANCEL switch: Pressed ON
CANCEL switch: Released OFF
RESUME/ACC SW

Ignition switch: ONRESUME/ACCELERATE switch:
PressedON
RESUME/ACCELERATE switch:
ReleasedOFF
SET SW

Ignition switch: ONSET/COAST switch: Pressed ON
SET/COAST switch: Released OFF
DTC No.Trouble Diagnosis
NameDTC Detecting Condition Possible Cause
P1564
1564ASCD steering
switch

An excessively high voltage signal from the ASCD
steering switch is sent to ECM.

ECM detects that input signal from the ASCD
steering switch is out of the specified range.

ECM detects that the ASCD steering switch is
stuck ON.

Harness or connectors
(The switch circuit is open or shorted.)

ASCD steering switch

ECM