bank 2 NISSAN 350Z 2007 Z33 Engine Control Service Manual

EC-190
DTC P0078 P0084 EVT CONTROL MAGNET RETARDER
Revision: 2006 November2007 350Z
DTC P0078 P0084 EVT CONTROL MAGNET RETARDERPFP:23795
Component DescriptionNBS0004R
Exhaust valve timing control magnet retarder (1) controls the shut/
open timing of the exhaust valve by ON/OFF pulse duty signals sent
from the ECM.
The longer pulse width retards valve angle.
The shorter pulse width advances valve angle.
CONSULT-III Reference Value in Data Monitor ModeNBS0004S
Specification data are reference values.
On Board Diagnosis LogicNBS0004T
DTC Confirmation ProcedureNBS0004U
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.
WITH CONSULT-III
1. Start engine and let it idle for 5 seconds.
2. Check 1st trip DTC.
3. If 1st trip DTC is detected, go to EC-195, "
Diagnostic Procedure" .
WITH GST
Following the procedure “WITH CONSULT-III” above.
PBIB3525E
MONITOR ITEM CONDITION SPECIFICATION
EX VTC DTY B1
EX VTC DTY B2

Engine: After warming up

Shift lever: Neutral

Air conditioner switch: OFF

No loadIdle 0% - 2%
Around 2,500 rpm while the engine
speed is risingApprox. 0% - 70%
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0078
0078
(Bank 1)Exhaust valve timing con-
trol magnet retarder cir-
cuitAn improper voltage is sent to the ECM
through exhaust valve timing control magnet
retarder.

Harness or connectors
(Exhaust valve timing control magnet
retarder circuit is open or shorted.)

Exhaust valve timing control magnet
retarder P0084
0084
(Bank 2)

DTC P0078 P0084 EVT CONTROL MAGNET RETARDER
EC-191
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Revision: 2006 November2007 350Z
Wiring DiagramNBS0004V
BANK 1
TBWT1623E

EC-192
DTC P0078 P0084 EVT CONTROL MAGNET RETARDER
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)
6 L/ORExhaust valve timing control
magnet retarder (bank 1)[Engine is running]

Warm-up condition

Idle speedBATTERY VOLTAGE
(11 - 14V)
[Engine is running]

Warm-up condition

Around 2,500 rpm while the engine speed is
rising7 - 12V
24 BR/YECM relay
(Self shut-off)[Engine is running]
[Ignition switch: OFF]

For a few seconds after turning ignition
switch OFF0 - 1.5V
[Ignition switch: OFF]

More than a few seconds after turning igni-
tion switch OFFBATTERY VOLTAGE
(11 - 14V)
125 R Power supply for ECM[Ignition switch: ON]BATTERY VOLTAGE
(11 - 14V)
PBIB3542E

DTC P0078 P0084 EVT CONTROL MAGNET RETARDER
EC-193
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Revision: 2006 November2007 350Z
BANK 2
TBWT1624E

EC-194
DTC P0078 P0084 EVT CONTROL MAGNET RETARDER
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)
7Y/RExhaust valve timing control
magnet retarder (bank 2)[Engine is running]

Warm-up condition

Idle speedBATTERY VOLTAGE
(11 - 14V)
[Engine is running]

Warm-up condition

Around 2,500 rpm while the engine speed is
rising7 - 12V
24 BR/YECM relay
(Self shut-off)[Engine is running]
[Ignition switch: OFF]

For a few seconds after turning ignition
switch OFF0 - 1.5V
[Ignition switch: OFF]

More than a few seconds after turning igni-
tion switch OFFBATTERY VOLTAGE
(11 - 14V)
125 R Power supply for ECM[Ignition switch: ON]BATTERY VOLTAGE
(11 - 14V)
PBIB3542E

DTC P0078 P0084 EVT CONTROL MAGNET RETARDER
EC-195
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Revision: 2006 November2007 350Z
Diagnostic ProcedureNBS0004W
1. CHECK EXHAUST VALVE TIMING CONTROL MAGNET RETARDER POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect exhaust valve timing control magnet retarder harness connector.
3. Turn ignition switch ON.
4. Check voltage between exhaust valve timing control magnet
retarder terminal 1 and ground with CONSULT-III or tester.
OK or NG
OK >> GO TO 3.
NG >> GO TO 2.
2. DETECT MALFUNCTIONING PART
Check the following.

Harness connectors E12, F3

Harness for open or short between exhaust valve timing control magnet retarder and IPDM E/R
>> Repair open circuit or short to ground or short to power in harness or connectors.
3. CHECK EXHAUST VALVE TIMING CONTROLMAGNET RETARDER OUTPUT SIGNAL CIRCUIT FOR
OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Checking harness continuity between exhaust valve timing control magnet retarder terminal 2 and ECM
terminal 6 (bank 1), 7 (bank 2).
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.
1. Exhaust valve timing control magnet
retarder (bank 1) harness connector2. Intake valve timing control solenoid
valve (bank 1) harness connector3. Intake valve timing control solenoid
valve (bank 2) harness connector
4. Exhaust valve timing control magnet
retarder (bank 2) harness connector
Voltage: Battery voltage
PBIB3508E
PBIB3468E
Continuity should exist.

DTC P0101, P010B MAF SENSOR
EC-197
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Revision: 2006 November2007 350Z
DTC P0101, P010B MAF SENSORPFP:22680
Component DescriptionNBS0004Z
The mass air flow sensor (1) is placed in the stream of intake air. It
measures the intake flow rate by measuring a part of the entire
intake flow. The mass air flow sensor controls the temperature of the
hot wire is to a certain amount. The heat generated by the hot wire is
reduced as the intake air flows around it. The more air, the greater
the heat loss.
Therefore, the electric current supplied to hot wire is changed to
maintain the temperature of the hot wire as air flow increases. The
ECM detects the air flow by means of this current change.
CONSULT-III Reference Value in Data Monitor ModeNBS00050
Specification data are reference values.
On Board Diagnosis LogicNBS00051
PBIA9559J
MONITOR ITEM CONDITION SPECIFICATION
MAS A/F SE-B1
See EC-132, "
TROUBLE DIAGNOSIS - SPECIFICATION VALUE" .
MAS A/F SE-B2
CAL/LD VALUE

Engine: After warming up

Shift lever: P or N (A/T), Neutral
(M/T)

Air conditioner switch: OFF

No loadIdle 5% - 35%
2,500 rpm 5% - 35%
MASS AIRFLOW

Engine: After warming up

Shift lever: P or N (A/T), Neutral
(M/T)

Air conditioner switch: OFF

No loadIdle 2.0 - 6.0 g·m/s
2,500 rpm 7.0 - 20.0 g·m/s
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0101
0101
(Bank 1)
Mass air flow sensor cir-
cuit range/performance
problemA)A high voltage from the sensor is sent to ECM
under light load driving condition.

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

Mass air flow sensor

EVAP control system pressure
sensor

Intake air temperature sensor
P010B
010B
(Bank 2)B)A low voltage from the sensor is sent to ECM
under heavy load driving condition.

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

Intake air leaks

Mass air flow sensor

EVAP control system pressure
sensor

Intake air temperature sensor

EC-200
DTC P0101, P010B MAF SENSOR
Revision: 2006 November2007 350Z
Wiring DiagramNBS00054
BANK 1
TBWT1625E

DTC P0101, P010B MAF SENSOR
EC-201
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EC
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)
24 BR/YECM relay
(Self shut-off)[Engine is running]
[Ignition switch: OFF]

For a few seconds after turning ignition
switch OFF0 - 1.5V
68 BSensor ground
[Mass air flow sensor
(bank1), Intake air tempera-
ture sensor (bank 1)][Engine is running]

Warm-up condition

Idle speed0V
77 L/WMass air flow sensor
(bank1)[Engine is running]

Warm-up condition

Idle speed0.8 - 1.1V
[Engine is running]

Warm-up condition

Engine speed: 2,500 rpm1.4 - 1.7V
125 R Power supply for ECM[Ignition switch: ON]BATTERY VOLTAGE
(11 - 14V)

EC-202
DTC P0101, P010B MAF SENSOR
Revision: 2006 November2007 350Z
BANK 2
TBWT1626E