Acura RL. Manual - part 558

 

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Acura RL. Manual - part 558

 

 

DTC TROUBLESHOOTING INDEX 

DTC TROUBLESHOOTING INDEX 

Checking the DTCs by HDS  

DTC TROUBLESHOOTING INDEX 

2

36

12

54

22

72

32

90

42

108

3

37

13

55

23

73

33

91

43

109

4

39

14

57

24

75

34

93

44

111

5

41

15

59

25

77

35

95

45

113

6

43

16

61

26

79

36

97

46

115

7

45

17

63

27

81

37

99

47

117

8

46

18

64

28

82

38

100

48

118

9

48

19

66

29

84

39

102

49

120

°C

°F

°C

°F

°C

°F

°C

°F

°C

°F

50

122

60

140

70

158

80

176

90

194

51

124

61

142

71

160

81

178

91

196

52

126

62

144

72

162

82

180

92

198

53

127

63

145

73

163

83

181

93

199

54

128

64

147

74

165

84

183

94

201

55

131

65

149

75

167

85

185

95

203

56

133

66

151

76

169

86

187

96

205

57

135

67

152

77

170

87

188

97

207

58

136

68

154

78

172

88

190

98

208

59

139

69

158

79

174

89

192

99

210

DTC

Detection Item or 

Symptom

ECU

DTC type

B1200 

Communication bus line 
error

Climate control unit

Loss of communication

B1202

Climate control unit 
internal error

Climate control unit

Internal error

B1205

Climate control unit lost 
communication with 
gauge control module 
(VSP/NE message)

Climate control unit

Loss of communication

B1206

Climate control unit lost 
communication with 
gauge control module 
(ECT message)

Climate control unit

Loss of communication

B1207

Climate control unit lost 
communication with 
gauge control module 
(ILLUMI message)

Climate control unit

Loss of communication

B1208

Climate control unit lost 
communication with 

Climate control unit

Loss of communication

 

2007 Acura RL 

2005-08 HVAC HVAC - RL

  

me 

 

Friday, June 05, 2009 2:25:42 PM

Page 15 

© 2005 Mitchell Repair Information Company, LLC. 

keyless access control 
unit (FOB ID message)

B1225

An open in the in-car 
temperature sensor circuit

Climate control unit

Signal error

B1226

A short in the in-car 
temperature sensor circuit

Climate control unit

Signal error

B1227

An open in the outside air 
temperature sensor circuit

Climate control unit

Signal error

B1228

A short in the outside air 
temperature sensor circuit

Climate control unit

Signal error

B1229

An open in the sunlight 
sensor circuit

Climate control unit

Signal error

B1230

A short in the sunlight 
sensor circuit

Climate control unit

Signal error

B1231

An open in the 
evaporator temperature 
sensor circuit

Climate control unit

Signal error

B1232

A short in the evaporator 
temperature sensor circuit

Climate control unit

Signal error

B1235

A problem in the driver's 
air mix control linkage, 
door, or motor

Climate control unit

Signal error

B1238

A problem in the 
passenger's air mix 
control linkage, door, or 
motor

Climate control unit

Signal error

B1240

A problem in the mode 
control linkage, doors, or 
motor

Climate control unit

Signal error

B1241

A problem in the blower 
motor circuit

Climate control unit

Signal error

B2975

An open in the driver's 
vent air temperature 
sensor circuit

Climate control unit

Signal error

B2976

A short in the driver's 
vent air temperature 
sensor circuit

Climate control unit

Signal error

B2977

An open in the 
passenger's vent air 
temperature sensor circuit

Climate control unit

Signal error

B2978

A short in the passenger's 
vent air temperature 
sensor circuit

Climate control unit

Signal error

B2979

An open in the A/C 
pressure sensor circuit

Climate control unit

Signal error

B2980

A short in the A/C 
pressure sensor circuit

Climate control unit

Signal error

B2981

Climate control unit lost  Climate control unit

Loss of communication

 

2007 Acura RL 

2005-08 HVAC HVAC - RL

  

me 

 

Friday, June 05, 2009 2:25:42 PM

Page 16 

© 2005 Mitchell Repair Information Company, LLC. 

SYMPTOM TROUBLESHOOTING INDEX 

TROUBLESHOOTING CHART 

communication with 
navigation unit

B2982

Climate control unit lost 
communication with each 
control motor

Climate control unit

Loss of communication

B2983

A problem in the 
recirculation control 
linkage, door, or motor

Climate control unit

Signal error

B2984

A problem in the driver's 
cool vent control linkage, 
door, or motor

Climate control unit

Signal error

B2985

A problem in the 
passenger's cool vent 
control linkage, door, or 
motor

Climate control unit

Signal error

B2987

A problem in the rear 
vent control linkage, 
door, or motor

Climate control unit

Signal error

B2991

Climate control unit lost 
communication with 
audio unit

Climate control unit

Loss of communication

Symptom

Diagnostic procedure

Also check for

All control motors do 
not run

Control motor power supply circuit 
troubleshooting (see CONTROL 
MOTOR POWER SUPPLY 
CIRCUIT TROUBLESHOOTING
 )

HVAC DTCs (see GENERAL 
TROUBLESHOOTING 
INFORMATION
 )  

Blown fuse No. 9 (7.5 A) in the 
passenger's under-dash fuse/relay 
box  

Cleanliness and tightness of all 
terminals  

Aspirator fan does 
not run

Aspirator fan circuit troubleshooting 
(see ASPIRATOR FAN CIRCUIT 
TROUBLESHOOTING
 )

HVAC DTCs (see GENERAL 
TROUBLESHOOTING 
INFORMATION
 )  

Blown fuse No. 30 (7.5 A) in the 
driver's under-dash fuse/relay box 

Poor ground at G503 (see 
GROUND TO COMPONENTS 
INDEX
 )  

Cleanliness and tightness of all 
terminals  

HVAC DTCs (see GENERAL 
TROUBLESHOOTING 
INFORMATION
 )  

 

2007 Acura RL 

2005-08 HVAC HVAC - RL

  

me 

 

Friday, June 05, 2009 2:25:42 PM

Page 17 

© 2005 Mitchell Repair Information Company, LLC. 

Blower, heater 
controls, and A/C do 
not work

Climate control power and ground 
circuit troubleshooting (see 
CLIMATE CONTROL POWER 
AND GROUND CIRCUIT 
TROUBLESHOOTING
 )

Blown fuse No. 30 (7.5 A) in the 
driver's under-dash fuse/relay box 

Poor ground at G503 (see 
GROUND TO COMPONENTS 
INDEX
 )  

Cleanliness and tightness of all 
terminals  

Both fans do not run 
with the A/C on (but 
the A/C compressor 
runs with the A/C on)

Radiator and A/C condenser fans 
common circuit troubleshooting (see 
RADIATOR FAN AND A/C 
CONDENSER FAN CIRCUIT 
TROUBLESHOOTING
 )

Powertrain DTCs (see 
GENERAL 
TROUBLESHOOTING 
INFORMATION
 )  

Blown fuse No. 23 (7.5 A) in the 
driver's under-dash fuse/relay box 

Poor ground at G301 (see 
GROUND TO COMPONENTS 
INDEX
 )  

Cleanliness and tightness of all 
terminals  

The A/C condenser 
fan does not run at all 
(but the radiator fan 
and the A/C 
compressor run with 
the A/C on)

A/C condenser fan circuit 
troubleshooting (see A/C 
CONDENSER FAN CIRCUIT 
TROUBLESHOOTING (OPEN)
 )

Powertrain DTCs (see 
GENERAL 
TROUBLESHOOTING 
INFORMATION
 )  

Blown fuse No. 23 (7.5 A) in the 
driver's under-dash fuse/relay box 

Poor ground at G301 (see 
GROUND TO COMPONENTS 
INDEX
 )  

Cleanliness and tightness of all 
terminals  

Radiator fan does not 
run at all (but the 
A/C condenser fan 
and the A/C 
compressor run with 
the A/C on)

Radiator fan circuit troubleshooting 
(see RADIATOR FAN AND A/C 
CONDENSER FAN CIRCUIT 
TROUBLESHOOTING
 )

Powertrain DTCs (see 
GENERAL 
TROUBLESHOOTING 
INFORMATION
 )  

Blown fuse No. 23 (7.5 A) in the 
driver's under-dash fuse/relay box 

Poor ground at G301 (see 
GROUND TO COMPONENTS 
INDEX
 )  

Cleanliness and tightness of all 
terminals  

The A/C compressor 
clutch does not 
engage(but both fans 

A/C compressor clutch circuit 
troubleshooting (see A/C 
COMPRESSOR CLUTCH 

HVAC DTCs (see GENERAL 
TROUBLESHOOTING 
INFORMATION
 )  

Blown fuse No. 12 (7.5 A) in the 
under-hood fuse/relay box, and 
No. 30 (7.5 A) in the driver's 

 

2007 Acura RL 

2005-08 HVAC HVAC - RL

  

me 

 

Friday, June 05, 2009 2:25:42 PM

Page 18 

© 2005 Mitchell Repair Information Company, LLC. 

 

 

 

 

 

 

 

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