Polaris 2015 RZR 900 Service Manual page 186

FUEL SYSTEM
DATA DISPLAY
ITEM
ECU control of the
Fuel Pump
Number of steps the
Idle Air Control
ECU would like to
Desired Position
have the IAC open
Number of steps the
Idle Air Control
Position Command
Ignition Coil Dwell
grounding the coil
Degrees BTDC that
the ECU is signaling
Ignition Timing
the coil to send spark
Injector Pulse Width
Intake Air
temperature at the
Temperature
pressure inside the
intake manifold on
the TMAP sensor.
Manifold Absolute Reading will be high
Pressure at key on and wide
Reading will be low
How much load the
Percent Engine Load
Indicates if the ECU
RPM Limit is currently limiting
Indicates what gear
Selected Gear
transmission switch
Spark Angle
ECU control of the
Start Enable Driver
4.32
DEFINITION
≈ 232° F (111° C)
≈ 237° F (114° C)
≈ 252° F (122° C)
fuel pump
ECU has the IAC
valve open
Time the ECU is
0 to 10° BTDC
30 to 40° BTDC
to a cylinder
Time the ECU is
grounding the
injectors
Measures air
TMAP sensor
Measures air 14.7 PSI (101 kPa)
5–7 PSI (34–48
7–11 PSI (48–76
open throttle.
at idle / closed
throttle.
engine is under
RPM
position the dependent on gear
is in
Same as ignition
timing
start solenoid
9925723 R01 - 2015 RZR 900 Service Manual
© Copyright 2014 Polaris Industries Inc.
VALUE
Engine protection (ignition misfire)
ECU is grounding the fuel pump relay. ECU
ground this relay for the first 2–3 seconds after
On
key on and any time RPM is seen from the CPS
ECU is not grounding the fuel pump relay. Pump
Off
35–50
35 – 50
≈ 2–3 ms
Typical ignition timing on a warm engine at idle
Typical max spark at wide open throttle
Average reading on a warm engine at idle
2–3 ms
Unit is start-up enrichment or under rapid
4–7 ms
should be close to ambient air temperature.
Warm engine at idle may cause reading to be
varies
Engine not running and unit is near sea level
Normal reading when warm engine is at idle
kPa)
Normal reading when unit is 1/2 throttle to WOT
kPa)
Typical warm idle. Cold start up reading will be
20–30%
Active
Inactive
High, Low, Neutral, Reverse, Park
"–" or Null indicates no reading from the sensor /
selected
—
ECU is grounding the start solenoid. Unit should
Active
crank when key is turned to START
ECU is not grounding the start solenoid
Inactive
VALUE DESCRIPTION
Hot light on – power limit
Engine protection (shutdown)
not running
typical warm idle
typical warm idle
–
acceleration
higher
higher
ECU is limiting the RPM
ECU is not limiting RPM
stuck between gear positions
—