Section04ENGINEMANAGEMENT(15034-TEC)
Subsection 03 (COMPONENT INSPECTION, REPLACEMENT AND ADJUSTMENT)
TEMPERATURE RESISTANCE (OHMS)
°C °F NOMINAL LOW HIGH
-30 -22 12600 11800 13400
-20
-4
11400 11000 11800
-10
14
9500 8000 11,000
0 32 5900 4900 6900
10 50 3800 3100 4500
20 68 2500 2200 2800
30 86 1700 1500 1900
40 104 1200 1080 1320
50 122 840 750 930
60 140 630 510 750
70 158 440 370 510
80 176 325 280 370
90 194 245 210 280
100 212 195 160 210
110 230
145
125 160
120 248
115
100 125
CONVERSION CHART FOR TEMPERATURE SENSORS
The resistance value of a temperature sensor may
test good at a certain temperature but it might be
defective at other temperatures. If in doubt, try a
new sensor.
Also remember this validates the operation of
the sensor at ambient temperature. It does not
validate the over temperature functionality. To
test it, the sensor could be removed from the
engine/muffler and heated with a heat gun while
it is still connected to the harness to see if the
ECM will detect the high temperature condition
and generate a fault code.
NOTE: In case of overheating, EGTS and CTS do
not generate fault codes. A message will be dis-
played on the information center, the beeper will
be activated and the EMS will be set in limp home
mode.
ECM Connectors
The most recommended and safest method to
probe ECM connector terminals is to use the
ECM adapter (P/N 420 277 010). This tool will
prevent deforming or enlarging terminals which
would lead to bad ECM terminal contact creating
intermittent or permanent problems.
420277010
Disconnect the desired connector from ECM and
reconnect on the tool connector. Probe required
terminals directly in the tool holes.
A35C3UA
CAUTION: If not using the ECM adapter, probe
on top of terminal only. Do not try to probe in-
side terminal or to use a paper clip to probe in-
side terminal, it will damage the square-shaped
terminal and this could lead to improper func-
tion of the engine management system.
110 smr2005-013
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