Section 04 FUEL SYSTEM
Subsection 02 (ELECTRONIC FUEL INJECTION (EFI))
COOLANT TEMPERATURE
SENSOR (CTS)
smr2006-020-057_b
TYPICAL
1. Coolant temperature sensor (CTS)
NOTE:
Overheat signals will appear when coolant
temperature reaches:
ENGINE
TEMPERATURE
All 1503
110°C (230°F)
CTS Resistance Test
To gain access to the CTS, remove the required
parts as described in
CTS REPLACEMENT.
Disconnect the connector from the CTS and check
the resistance of the sensor itself.
lmr2006-021-005_a
The resistance should be as per following chart.
Otherwise, replace the CTS.
If resistance tests good, reconnect the CTS con-
nector and disconnect the ECM connector A on
the ECM.
Using a multimeter and the
ECM ADAPTER TOOL
(P/N 529 036 166)
, check the circuit resistance as
per table.
ECM ADAPTER
MEASUREMENT
PIN
RESISTANCE
A-A1
A-J2
See table below
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
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If resistance value is correct, check ECM. Refer to
ECM
elsewhere in this section.
If resistance value is incorrect, repair the connec-
tors or replace the wiring harness between ECM
connector and the CTS.
CTS Replacement
Open seat.
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247
Содержание GTX Limited iS 255 2009
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