Ski-Doo Ski Doo SUMMIT 2005 [266/1429] Resistance measurement
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Ski-Doo Ski Doo SUMMIT 2005 [266/1429] Resistance measurement

Ski-Doo Ski Doo MX Z 2005 [266/1429] Resistance measurement
Section 06 ENGINE MANAGEMENT (SDI)
Subsection 03 (COMPONENT INSPECTION, REPLACEMENT AND ADJUSTMENT)
WARNING
All electrical actuators (injectors, fuel pump,
ignition coils and starter solenoid) are con-
tinuously supplied by the battery when the
start button is depressed or if engine is rotat-
ed (with the rewind starter). Always discon-
nect the tether cord cap and the battery pri-
or to disconnecting any electric or electronic
parts.
To perform verifications, a good quality multimeter
such as Fluke 111 (P/N 529 035 868) should be
used.
Pay particular attention to ensure that pins are
not out of their connectors or out of shape. The
troubleshooting procedures cover problems not
resulting from one of these causes.
CAUTION: Ensure all terminals are properly
crimped on wires and connector housings are
properly fastened.
Before replacing an ECM, always check electrical
connections. Make sure that they are very tight
and they make good contact and that they are
corrosion-free. Check if wiring harness shows any
signs of scoring. Particularly check ECM ground
connections. Ensure that contacts are good and
clean. A “defective module” could possibly be
repaired simply by unplugging and replugging the
ECM. The voltage and current might be too weak
to go through dirty wire pins. Check carefully if
pins show signs of moisture, corrosion or if they
look dull. Clean pins properly and then coat them
prior to assembling as follows:
NOTE: Do not apply dielectric grease or other lu-
bricant on the ECM connectors.
If the newly replaced ECM works, try the old one
and recheck if it works.
Ensure that all electronic components are genuine
– any modification on the wiring harness may lead
to generate fault codes or bad operation.
NOTE: For diagnostics purposes, use Vehicle
Communication Kit (VCK). See DIAGNOSTIC
PROCEDURES for proper connectors/adaptors.
After a problem has been solved, ens
uretoclear
the fault(s) in the ECM using the V
CK. Refer to
DIAGNOSTIC PROCEDURES subsec
tion.
RESISTANCE MEASUREMENT
Whenmeasuringtheresistancewithanohmme-
ter, all values are given for a temperature of 20°C
(68°F). The resistance value of a resistance varies
with the temperature. The resistance value for
usual resistor or windings (such as injectors) in-
creases as the temperature increases. However,
some of our temperature sensors are NTC types
(Negative Temperature Coefficient) and work the
opposite which means that the resistance value
decreases as the temperature increases. Take it
into account when measuring at temperatures dif-
ferent from 20°C(68°F). Use this table for resis-
tance variation relative to temperature for temper-
ature sensors.
TEMPERATURE SENSOR TABLE
TEMPERATURE RESISTANCE (OHMS)
CTS FOR
°C °F ATS EGTS
GAUGE ECM
-40 -40 169.7 72412
-35 -31 52637
-30 -22 28000 38681
-25 -13 28718
-20 -4 14500 185.1 733.8 21529
-15 5 587.7 16288
-10 14 474 12431
-5 23 384.8 9565
0 32 5500 200.5 314.3 7418
5 41 258.4 5807
10 50 213.7 4582
15 59 177.7 3644
20 68 2500 148.7 2919
25 77 219.6 125 2355
30 86 105.6 1912
35 95 98.69 1562
40 104 1200 76.5 1284
45 113 65.54 1062
50 122 238.5 56.38 882.6
55 131 48.72 738.9
60 140 600 42.28 622
mmr2005-081 251

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