Nissan Murano: System / Air Conditioning Cut Control
System Description
SYSTEM DIAGRAM

*: ECM determines the start signal status by the signals of engine speed and battery voltage.
SYSTEM DESCRIPTION
This system improves engine operation when the air conditioner is used.
Under the following conditions, the air conditioner is turned OFF.
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When the accelerator pedal is fully depressed.
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When cranking the engine.
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At high engine speeds.
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When the engine coolant temperature becomes excessively high.
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When operating power steering during low engine speed or low Nissan Murano vehicle speed.
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When engine speed is excessively low.
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When refrigerant pressure is excessively low or high.
System Description
SYSTEM DIAGRAM*: ECM determines the start signal status by the signals of engine speed and battery voltage.SYSTEM DESCRIPTIONIgnition order: 1 - 2 - 3 - 4 - 5 - 6The ignition timing is controlled by the ECM to maintain the best air-fuel ratio for every running condition of the engine...
System Description
SYSTEM DIAGRAMBASIC ASCD SYSTEMRefer 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...
Other information:
DTC Description
DTC DETECTION LOGICWhen the ignition switch is ON, TCM is unable to receive the CAN communications signal from ECM continuously for 2 seconds or more. DTC
CONSULT screen terms
(Trouble diagnosis content)
DTC detection condition
U0100
LOST COMM (ECM A)
(Lost Communication With ECM/PCM A)
Diagnosis condition
When the ignition switch is ON
Signal
CAN communication signal
Threshold
TCM is unable to receive the CAN communications signal from ECM
Diagnosis delay time
Continuously for 2 seconds or more
POSSIBLE CAUSE
ECM
Harness or connector (CAN communication line is open or shorted)
FAIL-SAFE
Selector shock is large
Start is slow
Acceleration is slow
Lock-up is not performed
DTC Confirmation Procedure
CHECK DTC PRIORITY
WhenDTC U0100 is displayed together with DTC U0300, diagnose first the DTC U0300...
Reference Value
TERMINAL LAYOUTPHYSICAL VALUES
Terminal No.
(Wire color) Description Condition
Voltage
(Approx.)
+ - Signal name Input/Output
2
(BR)
Ground
Seat cushion heater sensor signal
Input
Ignition switch ON
Climate controlled seat switch select
HEAT or COOL
1...