MACS Service Reports - 2016 - FEB5

circuitry for the three flap door motors (fresh air
intake, mode control and air mix control), including
the ground, the power wiring splices and the single
data bus line to terminal No. 15 of the A/C amplifier (Figure 5). That could lead to locating and checking the splices and ground, and then the data bus
integrity (the right approach on a pre-2014 Rogue,
but a big waste of time on a new model). We recognize that when a car is an early production model,
it's not unusual for some of the systems to be carried over from the previous generation. However,
as we long have stressed, it's bad practice to start
by relying on a diagram that is not for the exact
model year, even though you might find later it's
the one that really applies because of a late phase
out.
Referring to the 2014 schematics (Figure 8), one
can see that the three motors are very different from
the 2013 setup. In fact, it's the major difference between the systems.
The 2013 systems have the motors on what is
called a LIN (Local Interconnect Network), a very
simple data bus, and as the diagram (Figure 5)

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and then execute an in-amplifier software strategy.
Note: you will see the intake sensor on both manual
and ATC systems, and may wonder what its special
function is. The answer is that it's just Nissan's term
for an evaporator temperature probe.
A comparison of the 2013 system with the 2014
edition in the Rogue shows the same approach in
2014, i.e. the bank of sensors wired to the amplifier (Figure 5), although the amplifier in the 2014
manual A/C system has been renamed (now called
the FAC (Front Air Control) module). And in both
years and with manual and ATC, the compressor
and blower control circuits are related. In fact,
the compressor control circuit (Figures 6, 7) is essentially identical; all systems have the long used
IPDM (Intelligent Power Distribution Module) with
a couple of fuses, a CPU (Central Processing Unit),
ignition and A/C relays, wired to the compressor
clutch. That CPU is on data lines to the body computer (BCM) and engine computer (ECM).
If a technician were trying to diagnose a 2014 system with 2013 schematics or with 2013 or earlier experience, he might start by noticing all the common

Figure 5: This section of a 2013 Nissan Rogue diagram for the Automatic Temperature Control system shows a bank of sensors. The intake sensor is Nissan's
name for an evaporator temperature probe. The amplifier has additional computational power for automatic temperature regulation using those sensors,
plus A/C request from the ECM and BCM. Notice that all three flap door motors have a common power feed and the single data bus connection that takes
signals from the amplifier. The manual A/C system is basically the same, but the controller is a simpler module that responds to the temperature and mode
commands of the driver settings of the control knobs. Each of the three motors contains a Local Control Unit and is part of a Local Interconnect Network to
the control head.

February 2016

MACS Service Reports

http://www.nissan-techinfo.com

Table of Contents for the Digital Edition of MACS Service Reports - 2016