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![INFINITI M35 2007 Factory Service Manual EC-736
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ENGINE CONTROL SYSTEM
Revision: 2007 April2007 M35/M45
During acceleration
The knock sensor retard system is designed only for emergencies. The basic ignition timing is programmed
wit INFINITI M35 2007 Factory Service Manual EC-736
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ENGINE CONTROL SYSTEM
Revision: 2007 April2007 M35/M45
During acceleration
The knock sensor retard system is designed only for emergencies. The basic ignition timing is programmed
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EC-736
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ENGINE CONTROL SYSTEM
Revision: 2007 April2007 M35/M45
During acceleration
The knock sensor retard system is designed only for emergencies. The basic ignition timing is programmed
within the anti-knocking zone, if recommended fuel is used under dry conditions. The retard system does not
operate under normal driving conditions. If engine knocking occurs, the knock sensor monitors the condition.
The signal is transmitted to the ECM. The ECM retards the ignition timing to eliminate the knocking condition.
Fuel Cut Control (At No Load and High Engine Speed)NBS0059L
INPUT/OUTPUT SIGNAL CHART
*: This signal is sent to the ECM through CAN communication line.
SYSTEM DESCRIPTION
If the engine speed is above 1,400 rpm under no load (for example, the selector lever position is neutral and
engine speed is over 1,400 rpm) fuel will be cut off after some time. The exact time when the fuel is cut off var-
ies based on engine speed.
Fuel cut will be operated until the engine speed reaches 1,000 rpm, then fuel cut will be cancelled.
NOTE:
This function is different from deceleration control listed under Multiport Fuel Injection (MFI) System, EC-733,
"Multiport Fuel Injection (MFI) System" .
Sensor Input Signal to ECM ECM function Actuator
Park/neutral position (PNP) switch Neutral position
Fuel cut control Fuel injector Accelerator pedal position sensor Accelerator pedal position
Engine coolant temperature sensor Engine coolant temperature
Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)Engine speed
Wheel sensor Vehicle speed*
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![INFINITI M35 2007 Factory Service Manual AIR CONDITIONING CUT CONTROL
EC-737
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AIR CONDITIONING CUT CONTROLPFP:23710
Input/Output Signal ChartNBS0059M
*1: This signal is sent INFINITI M35 2007 Factory Service Manual AIR CONDITIONING CUT CONTROL
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Input/Output Signal ChartNBS0059M
*1: This signal is sent](/manual-img/42/57024/w960_57024-2265.png)
AIR CONDITIONING CUT CONTROL
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Input/Output Signal ChartNBS0059M
*1: This signal is sent to the ECM through CAN communication line.
*2: ECM determines the start signal status by the signals of engine speed and battery voltage.
System DescriptionNBS0059N
This system improves engine operation when the air conditioner is used.
Under the following conditions, the air conditioner is turned off.
When the accelerator pedal is fully depressed.
When cranking the engine.
At high engine speeds.
When the engine coolant temperature becomes excessively high.
When operating power steering during low engine speed or low vehicle speed.
When engine speed is excessively low.
When refrigerant pressure is excessively low or high.
Sensor Input Signal to ECM ECM function Actuator
Air conditioner switch
Air conditioner ON signal*
1
Air conditioner
cut controlAir conditioner relay Accelerator pedal position sensor Accelerator pedal position
Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)Engine speed*
2
Engine coolant temperature sensor Engine coolant temperature
Battery
Battery voltage*
2
Refrigerant pressure sensor Refrigerant pressure
Power steering pressure sensor Power steering operation
Wheel sensor
Vehicle speed*
1
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![INFINITI M35 2007 Factory Service Manual EC-738
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AUTOMATIC SPEED CONTROL DEVICE (ASCD)
Revision: 2007 April2007 M35/M45
AUTOMATIC SPEED CONTROL DEVICE (ASCD)PFP:18930
System DescriptionNBS0059O
INPUT/OUTPUT SIGNAL CHART
*: This signa INFINITI M35 2007 Factory Service Manual EC-738
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AUTOMATIC SPEED CONTROL DEVICE (ASCD)
Revision: 2007 April2007 M35/M45
AUTOMATIC SPEED CONTROL DEVICE (ASCD)PFP:18930
System DescriptionNBS0059O
INPUT/OUTPUT SIGNAL CHART
*: This signa](/manual-img/42/57024/w960_57024-2266.png)
EC-738
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AUTOMATIC SPEED CONTROL DEVICE (ASCD)
Revision: 2007 April2007 M35/M45
AUTOMATIC SPEED CONTROL DEVICE (ASCD)PFP:18930
System DescriptionNBS0059O
INPUT/OUTPUT SIGNAL CHART
*: This signal is sent to the ECM through CAN communication line
BASIC ASCD SYSTEM
Refer to Owner's Manual for ASCD operating instructions.
Automatic Speed Control Device (ASCD) allows a driver to keep vehicle at predetermined constant speed
without depressing accelerator pedal. Driver can set vehicle speed in advance between approximately 40 km/
h (25 MPH) and 144 km/h (89 MPH).
ECM controls throttle angle of electric throttle control actuator to regulate engine speed.
Operation status of ASCD is indicated by CRUISE lamp and SET lamp in combination meter. If any malfunc-
tion occurs in ASCD system, it automatically deactivates control.
NOTE:
Always drive vehicle in safe manner according to traffic conditions and obey all traffic laws.
SET OPERATION
Press MAIN switch. (The CRUISE lamp in combination meter illuminates.)
When vehicle speed reaches a desired speed between approximately 40 km/h (25 MPH) and 144 km/h (89
MPH), press SET/COAST switch. (Then SET lamp in combination meter illuminates.)
ACCELERATE OPERATION
If the RESUME/ACCELERATE switch is pressed during cruise control driving, increase the vehicle speed until
the switch is released or vehicle speed reaches maximum speed controlled by the system.
And then ASCD will keep the new set speed.
CANCEL OPERATION
When any of following conditions exist, cruise operation will be canceled.
CANCEL switch is pressed
More than 2 switches at ASCD steering switch are pressed at the same time (Set speed will be cleared)
Brake pedal is depressed
Selector lever is changed to N, P, R position
Vehicle speed decreased to 13 km/h (8 MPH) lower than the set speed
TCS system is operated
When the ECM detects any of the following conditions, the ECM will cancel the cruise operation and inform
the driver by blinking indicator lamp.
Engine coolant temperature is slightly higher than the normal operating temperature, CRUISE lamp may
blink slowly.
When the engine coolant temperature decreases to the normal operating temperature, CRUISE lamp will
stop blinking and the cruise operation will be able to work by pressing SET/COAST switch or RESUME/
ACCELERATE switch.
Malfunction for some self-diagnoses regarding ASCD control: SET lamp will blink quickly.
If MAIN switch is turned to OFF during ASCD is activated, all of ASCD operations will be canceled and vehicle
speed memory will be erased.
Sensor Input signal to ECM ECM function Actuator
ASCD brake switch Brake pedal operation
ASCD vehicle speed controlElectric throttle control
actuator Stop lamp switch Brake pedal operation
ASCD steering switch ASCD steering switch operation
Park/Neutral position (PNP)
switchGear position
Wheel sensor Vehicle speed*
TCM Powertrain revolution*
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![INFINITI M35 2007 Factory Service Manual AUTOMATIC SPEED CONTROL DEVICE (ASCD)
EC-739
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COAST OPERATION
When the SET/COAST switch is pressed during cruise control driving, dec INFINITI M35 2007 Factory Service Manual AUTOMATIC SPEED CONTROL DEVICE (ASCD)
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COAST OPERATION
When the SET/COAST switch is pressed during cruise control driving, dec](/manual-img/42/57024/w960_57024-2267.png)
AUTOMATIC SPEED CONTROL DEVICE (ASCD)
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COAST OPERATION
When the SET/COAST switch is pressed during cruise control driving, decrease vehicle set speed until the
switch is released. And then ASCD will keep the new set speed.
RESUME OPERATION
When the RESUME/ACCELERATE switch is pressed after cancel operation other than pressing MAIN switch
is performed, vehicle speed will return to last set speed. To resume vehicle set speed, vehicle condition must
meet following conditions.
Brake pedal is released
A/T selector lever is in other than P and N positions
Vehicle speed is greater than 40 km/h (25 MPH) and less than 144 km/h (89 MPH)
Component DescriptionNBS0059P
ASCD STEERING SWITCH
Refer to EC-1272 .
ASCD BRAKE SWITCH
Refer to EC-1289 , and EC-1377 .
STOP LAMP SWITCH
Refer to EC-1289 , EC-1307 and EC-1377 .
ELECTRIC THROTTLE CONTROL ACTUATOR
Refer to EC-1316 , EC-1322 , EC-1329 and EC-1334 .
ASCD INDICATOR
Refer to EC-1384 .
Page 2269 of 4647
EC-740
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CAN COMMUNICATION
Revision: 2007 April2007 M35/M45
CAN COMMUNICATIONPFP:23710
System DescriptionNBS0059Q
CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-
tronic control units are equipped onto a vehicle, and each control unit shares information and links with other
control units during operation (not independent). In CAN communication, control units are connected with 2
communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring.
Each control unit transmits/receives data but selectively reads required data only.
Refer to LAN-50, "
CAN System Specification Chart" , about CAN communication for detail.
Page 2270 of 4647
![INFINITI M35 2007 Factory Service Manual EVAPORATIVE EMISSION SYSTEM
EC-741
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EVAPORATIVE EMISSION SYSTEMPFP:14950
DescriptionNBS0059R
SYSTEM DESCRIPTION
The evaporative emiss INFINITI M35 2007 Factory Service Manual EVAPORATIVE EMISSION SYSTEM
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DescriptionNBS0059R
SYSTEM DESCRIPTION
The evaporative emiss](/manual-img/42/57024/w960_57024-2269.png)
EVAPORATIVE EMISSION SYSTEM
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EVAPORATIVE EMISSION SYSTEMPFP:14950
DescriptionNBS0059R
SYSTEM DESCRIPTION
The evaporative emission system is used to reduce hydrocarbons emitted into the atmosphere from the fuel
system. This reduction of hydrocarbons is accomplished by activated charcoals in the EVAP canister.
The fuel vapor in the sealed fuel tank is led into the EVAP canister which contains activated carbon and the
vapor is stored there when the engine is not operating or when refueling to the fuel tank.
The vapor in the EVAP canister is purged by the air through the purge line to the intake manifold when the
engine is operating. EVAP canister purge volume control solenoid valve is controlled by ECM. When the
engine operates, the flow rate of vapor controlled by EVAP canister purge volume control solenoid valve is
proportionally regulated as the air flow increases.
EVAP canister purge volume control solenoid valve also shuts off the vapor purge line during decelerating and
idling.
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EC-742
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EVAPORATIVE EMISSION SYSTEM
Revision: 2007 April2007 M35/M45
EVAPORATIVE EMISSION LINE DRAWING
: Vehicle front : From next page
1. Intake manifold collector 2. EVAP canister purge volume control
solenoid valve3. EVAP service port
NOTE:
Do not use soapy water or any type of solvent while installing vacuum hose or purge hoses.
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EVAPORATIVE EMISSION SYSTEM
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: Vehicle front : To previous page
1. EVAP canister vent control valve 2. EVAP canister 3. EVAP control system pressure sensor
NOTE:
Do not use soapy water or any type of solvent while installing vacuum hose or purge hoses.
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