Chery Tiggo 5 (T21). Manual — part 352
31–
112
31
Heater Core Sensor (for Automatic A/C)
Inspection
1. Check the heater core sensor.
a. Using the ohm band of digital multimeter, measure the
resistance of heater core sensor according to the
table below.
Standard Resistance
-
+
RT21310990
1
2
Multimeter
Connection
Temperature
(°C)
Lower
Limit
(KΩ)
Standard
Value
(mm)
Upper
Limit
(KΩ)
Temperature
(°C)
Lower
Limit
(KΩ)
Standard
Value
(mm)
Upper
Limit
(KΩ)
Terminal 1 -
Terminal 2
36°C
1.388
1.453
1.520
69°C
0.451
0.483
0.516
Terminal 1 -
Terminal 2
37°C
1.337
1.400
1.467
70°C
0.437
0.468
0.501
Terminal 1 -
Terminal 2
38°C
1.289
1.351
1.415
71°C
0.424
0.454
0.486
Terminal 1 -
Terminal 2
39°C
1.242
1.303
1.366
72°C
0.411
0.441
0.472
Terminal 1 -
Terminal 2
40°C
1.198
1.258
1.319
73°C
0.398
0.428
0.458
Terminal 1 -
Terminal 2
41°C
1.156
1.213
1.274
74°C
0.386
0.415
0.445
Terminal 1 -
Terminal 2
42°C
1.114
1.172
1.230
75°C
0.378
0.398
0.418
Terminal 1 -
Terminal 2
43°C
1.075
1.131
1.189
76°C
0.364
0.390
0.420
Terminal 1 -
Terminal 2
44°C
1.037
1.091
1.148
77°C
0.353
0.379
0.408
Terminal 1 -
Terminal 2
45°C
1.001
1.056
1.110
78°C
0.343
0.368
0.397
Terminal 1 -
Terminal 2
46°C
0.966
1.018
1.073
79°C
0.333
0.358
0.385
Terminal 1 -
Terminal 2
47°C
0.933
0.984
1.038
80°C
0.323
0.348
0.375
Terminal 1 -
Terminal 2
48°C
0.900
0.950
1.004
81°C
0.314
0.337
0.364
Terminal 1 -
Terminal 2
49°C
0.870
0.919
0.970
82°C
0.305
0.328
0.354
31–
113
31
HINT:
Resistance decreases as the temperature increases.
If result is not as specified, replace the automatic A/C wire harness assembly.
Terminal 1 -
Terminal 2
50°C
0.840
0.890
0.937
83°C
0.296
0.319
0.344
Terminal 1 -
Terminal 2
51°C
0.812
0.858
0.908
84°C
0.287
0.310
0.335
Terminal 1 -
Terminal 2
52°C
0.784
0.830
0.879
85°C
0.279
0.300
0.326
Terminal 1 -
Terminal 2
53°C
0.758
0.803
0.850
86°C
0.271
0.293
0.317
Terminal 1 -
Terminal 2
54°C
0.733
0.777
0.823
87°C
0.264
0.285
0.308
Terminal 1 -
Terminal 2
55°C
0.708
0.751
0.797
88°C
0.256
0.276
0.300
Terminal 1 -
Terminal 2
56°C
0.685
0.727
0.772
89°C
0.249
0.269
0.292
Terminal 1 -
Terminal 2
57°C
0.663
0.704
0.748
90°C
0.242
0.262
0.284
Terminal 1 -
Terminal 2
58°C
0.641
0.681
0.724
91°C
0.236
0.254
0.277
Terminal 1 -
Terminal 2
59°C
0.621
0.660
0.702
92°C
0.229
0.247
0.269
Terminal 1 -
Terminal 2
60°C
0.601
0.643
0.680
93°C
0.223
0.241
0.262
Terminal 1 -
Terminal 2
61°C
0.581
0.621
0.659
94°C
0.217
0.234
0.255
Terminal 1 -
Terminal 2
62°C
0.562
0.600
0.639
95°C
0.211
0.228
0.249
Terminal 1 -
Terminal 2
63°C
0.545
0.582
0.620
96°C
0.205
0.222
0.242
Terminal 1 -
Terminal 2
64°C
0.496
0.564
0.601
97°C
0.200
0.216
0.236
Terminal 1 -
Terminal 2
65°C
0.511
0.546
0.582
98°C
0.194
0.210
0.230
Terminal 1 -
Terminal 2
66°C
0.495
0.530
0.565
99°C
0.189
0.205
0.224
Terminal 1 -
Terminal 2
67°C
0.480
0.513
0.548
100°C
0.184
0.200
0.219
Terminal 1 -
Terminal 2
68°C
0.465
0.498
0.532
Multimeter
Connection
Temperature
(°C)
Lower
Limit
(KΩ)
Standard
Value
(mm)
Upper
Limit
(KΩ)
Temperature
(°C)
Lower
Limit
(KΩ)
Standard
Value
(mm)
Upper
Limit
(KΩ)
31–
114
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