Terminals Of Ecm Toyota Camry

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A107881E12

23

22

21

20

19

18

17

16

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

il

10

9

8

7

6

5

4

3

2

1

40

39

38

37

36

35

34

33

32

31

30

29

28

27

26

25

24

19

18

17

16

15

14

13

12

46

45

44

43

42

41

22

21

20

63

62

61

60

59

58

57

56

55

54

53

52

51

50

49

48

47

30

29

28

27

26

25

24

23

86

85

84

83

82

81

80

79

78

77

76

75

74

73

72

71

70

69

68

67

66

65

64

41

40

39

38

37

36

35

34

33

32

31

103

102

101

100

99

98

97

96

95

94

93

92

91

90

89

88

87

49

48

47

46

45

44

43

42

109

108

107

106

105

104

52

51

50

126

125

124

123

122

121

120

119

118

117

116

115

114

113

112

111

110

60

59

58

57

56

55

54

53

V

y

V

The standard normal voltage between each pair of the ECM terminals is shown in the table below. The appropriate conditions for checking each pair of the terminals are also indicated. The result of checks should be compared with the standard normal voltage for that pair of the terminals, displayed in the Specified Condition column. The illustration above can be used as a reference to identify the ECM terminal locations.

Symbols (Terminal No.)

Wiring Colors

Terminal Descriptions

Conditions

Specified Conditions

BATT (A24-20) - E1 (C24-104)

Y - W-B

Battery (for measuring battery voltage and for ECM memory)

Always

9 to 14 V

+BM (A24-3) - E1 (C24-104)

LG - W-B

Power source of throttle actuator

Always

9 to 14 V

IGSW (A24-28) - E1 (C24-104)

Y - W-B

Ignition switch

Ignition switch to the ON position

9 to 14 V

+B (A24-2) - E1 (C24-104)

R - W-B

Power source of ECM

Ignition switch to the ON position

9 to 14 V

+B2 (A24-1) - E1 (C24-104)

R - W-B

Power source of ECM

Ignition switch to the ON position

9 to 14 V

OC1+ (C24-100) - OC1- (C24-123)

W - B

Camshaft timing oil control valve (OCV)

Idling

Pulse generation (see waveform 1)

MREL (A24-44) - E1 (C24-104)

O - W-B

EFI relay

Ignition switch to the ON position

9 to 14 V

VG (C24-118) - E2G (C24-116)

SB - W

Mass air flow meter

Idling, Shift lever position P or N, A/ C switch OFF

0.5 to 3.0 V

THA (C24-65) - ETHA (C24-88)

P - Y

Intake air temperature sensor

Idling, Intake air temperature 20°C (68° F)

0.5 to 3.4 V

THW (C24-97) - ETHW (C24-96)

B - P

Engine coolant temperature sensor

Idling, Engine coolant temperature 80°C (176°F)

0.2 to 1.0 V

VCTA (C24-67) - ETA (C24-91)

B - P

Power source of throttle position sensor (specific voltage)

Ignition switch to the ON position

4.5 to 5.5 V

VTA1 (C24-115) - ETA (C24-91)

Y - P

Throttle position sensor (for engine control)

Ignition switch to the ON position, Throttle valve fully closed

0.5 to 1.1 V

Ignition switch to the ON position, Throttle valve fully open

3.3 to 4.9 V

Symbols (Terminal No.)

Wiring Colors

Terminal Descriptions

Conditions

Specified Conditions

VTA2 (C24-114) - ETA (C24-91)

W-L - P

Throttle position sensor (for sensor malfunction detection)

Ignition switch to the ON position, Throttle valve fully closed

2.1 to 3.1 V

Ignition switch to the ON position, Throttle valve fully open

4.6 to 5.0 V

VPA (A24-55) - EPA (A24-59)

G - Y

Accelerator pedal position sensor (for engine control)

Ignition switch to the ON position, Accelerator pedal released

0.5 to 1.1 V

Ignition switch to the ON position, Accelerator pedal fully depressed

2.6 to 4.5 V

VPA2 (A24-56) - EPA2 (A24-60)

R - O

Accelerator pedal position sensor (for sensor malfunctioning detection)

Ignition switch to the ON position, Accelerator pedal released

1.2 to 2.0 V

Ignition switch to the ON position, Accelerator pedal fully depressed

3.4 to 5.0 V

VCPA (A24-57) - EPA (A24-59)

B - Y

Power source of accelerator pedal position sensor (for VPA)

Ignition switch to the ON position

4.5 to 5.5 V

VCP2 (A24-58) - EPA2 (A24-60)

L - O

Power source of accelerator pedal position sensor (for VPA2)

Ignition switch to the ON position

4.5 to 5.5 V

HA1A (C24-109) - E04 (C24-46)

G - W

A/F sensor heater

Idling

Below 3.0 V

Ignition switch to the ON position

9 to 14 V

A1A+ (C24-112) - E1 (C24-104)

L -W-B

A/F sensor

Ignition switch to the ON position

3.3 V*1

A1A- (C24-113) - E1 (C24-104)

P - W-B

A/F sensor

Ignition switch to the ON position

3.0 V*1

HT1B (C24-47) - E03 (C24-86)

LG - B

Heated oxygen sensor heater

Idling

Below 3.0 V

Ignition switch to the ON position

9 to 14 V

OX1B (C24-64) - EX1B (C24-87)

W - BR

Heated oxygen sensor

Engine speed maintained at 2,500 rpm for 2 minutes after warming up sensor

Pulse generation (see waveform 2)

#10 (C24-108) - E01 (C24-45) #20 (C24-107) - E01 (C24-45) #30 (C24-106) - E01 (C24-45) #40 (C24-105) - E01 (C24-45)

B - W-B R - W-B Y - W-B L - W-B

Injector

Ignition switch to the ON position

9 to 14 V

Idling

Pulse generation (see waveform 3)

KNK1 (C24-110) - EKNK (C24-111)

G - R

Knock sensor

Engine speed maintained at 4,000 after warming up engine

Pulse generation (see waveform 4)

G2+ (C24-99) - G2- (C24-98)

Y - BR

Camshaft position sensor

Idling

Pulse generation (see waveform 5)

NE+ (C24-122) - NE- (C24-121)

G - R

Crankshaft position sensor

Idling

Pulse generation (see waveform 5)

IGT1 (C24-85) - E1 (C24-104) IGT2 (C24-84) - E1 (C24-104) IGT3 (C24-83) - E1 (C24-104) IGT4 (C24-82) - E1 (C24-104)

W - W-B G-R - W-B G - W-B LG - W-B

Ignition coil (ignition signal)

Idling

Pulse generation (see waveform 6)

IGF1 (C24-81) - E1 (C24-104)

BR - W-B

Ignition coil (ignition confirmation signal)

Ignition switch to the ON position

4.5 to 5.5 V

Idling

Pulse generation (see waveform 6)

PRG (C24-49) - E1 (C24-104)

O - W-B

Purge VSV

Ignition switch to the ON position

9 to 14 V

Idling

Pulse generation (see waveform 7)

SPD (A24-8) - E1 (C24-104)

L - W-B

Speed signal from combination meter

Driving at 12 mph (20 km/h)

Pulse generation (see waveform 8)

STA (A24-48) - E1 (C24-104)

V - W-B

Starter signal

Cranking

5.5 V or more

NSW (C24-52)*2 - E1 (C24-104)

SB - W-B

Starter relay control

Ignition switch to the ON position

Below 1.5 V

Cranking

5.5 V or more

STP (A24-36) - E1 (C24-104)

W - W-B

Stop light switch

Brake pedal depressed

7.5 to 14 V

Brake pedal released

Below 1.5 V

ES

Symbols (Terminal No.)

Wiring Colors

Terminal Descriptions

Conditions

Specified Conditions

ST1- (A24-35) - E1 (C24-104)

GR - W-B

Stop light switch (opposite to STP terminal)

Ignition switch to the ON position, Brake pedal depressed

Below 1.5 V

Ignition switch to the ON position, Brake pedal released

7.5 to 14 V

M+ (C24-42) - ME01 (C24-43)

G - B

Throttle actuator

Idling with warm engine

Pulse generation (see waveform 9)

M- (C24-41) - ME01 (C24-43)

R - B

Throttle actuator

Idling with warm engine

Pulse generation (see waveform 10)

FC (A24-7) - E1 (C24-104)

Y - W-B

Fuel pump control

Ignition switch to the ON position

9 to 14 V

Idling

Below 1.5 V

W (A24-24) - E1 (C24-104)

BR - W-B

MIL

Ignition switch to the ON position

Below 1.5 V

Idling

9 to 14 V

TC (A24-27) - E1 (C24-104)

P - W-B

Terminal TC of DLC3

Ignition switch to the ON position

9 to 14 V

TACH (A24-15) - E1 (C24-104)

B - W-B

Engine speed

Idling

Pulse generation (see waveform 11)

VPMP (A24-42) - E1 (C24-104)

W - W-B

Vent valve (built into canister pump module)

Ignition switch to the ON position

9 to 14 V

MPMP (A24-34) - E1 (C24-104)

G - W-B

Leak detection pump (built into canister pump module)

Leak detection pump OFF

Below 3 V

Leak detection pump ON

9 to 14 V

VCPP (C24-70) - EPPM (C24-94)

R - G

Power source for canister pressure sensor (specific voltage)

Ignition switch to the ON position

4.5 to 5.5 V

PPMP (C24-71) - EPPM (C24-94)

L - G

Canister pressure sensor (built into canister pump module)

Ignition switch to the ON position

3 to 3.6 V

FANL (A24-21) - E1 (C24-104)

R - W-B

Fan No. 1 relay

Ignition switch to the ON position

9 to 14 V

Idling with A/C ON, or high engine coolant temperature

Below 1.5 V

FANH (A24-22) - E1 (C24-104)

W - W-B

Fan No. 2, 3 relay

Idling with high engine coolant temperature

Below 1.5 V

ALT (C24-50) - E1 (C24-104)

L - W-B

Generator

Ignition switch to the ON position

9 to 14 V

CANH (A24-41) - E1 (C24-104)

B - W-B

CAN communication line

Ignition switch to the ON position

Pulse generation (see waveform 12)

CANL (A24-49) - E1 (C24-104)

W - W-B

CAN communication line

Ignition switch to the ON position

Pulse generation (see waveform 13)

IAC+ (A24-33)*3 - E1 (C24-104)

L - W-B

Intake manifold runner valve motor

Ignition switch to the ON position

Pulse generation

IAC- (A24-52)*3 - E1 (C24-104)

W - W-B

Intake manifold runner valve motor

Ignition switch to the ON position

Pulse generation

VCIA (C24-103)*3 - EIA (C24-126)*3

B - L

Power source of intake manifold runner valve position sensor (Specific voltage)

Ignition switch to the ON position

4.5 to 5.5 V

IACA (C24-93)*3 - EIA (C24-126)*3

B-W - L

Intake manifold runner valve position sensor

Ignition switch to the ON position, intake manifold runner valve fully closed.

0.2 to 1.0 V

Ignition switch to the ON position, intake manifold runner valve fully opened.

*1: The ECM terminal voltage is constant regardless of the output voltage from the sensor. *2: Automatic transaxle only *3: PZEV only

1 1 1 1

1 1 1 1 H/AWi-N

1 1 1 1

A085286E24

A093279E10

1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 r

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1 M 1 1

1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1.

J 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1

i

L_____________i:

1 1 1 1 :

5 V/DIV.

111111 111111

i

111111111

1111111111

GND ^

•n i 11 m 11111

_i 1111 M 11

1111111 M i

i i i

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1 ms./DIV.

A093229E11

1. WAVEFORM 1

Camshaft timing oil cont

trol valve (OCV):

ECM Terminal Names

Between OC1+ and OC1-

Tester Ranges

5 V/DIV., 1 ms./DIV.

Conditions

Idling

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