Chery Tiggo 5 (T21). Service manual - part 352

 

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Chery Tiggo 5 (T21). Service 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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