Mitsubishi Colt Ralliart. Manual — part 63

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4A9>

13A-206

PROBABLE CAUSES

• Failed accelerator pedal position sensor

• Open/short circuit in accelerator pedal position

sensor circuit or loose connector contact

• Failed engine-ECU <M/T> or engine-CVT-ECU

<CVT>

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III data list

• Refer to Data List Reference Table

P.13A-331

.

a. Item 78: Accelerator pedal position sensor

(main)

Q: Is the check result normal?

YES :

Intermittent malfunction (Refer to GROUP

00

− How to Use

Troubleshooting/Inspection Service Points

−

How to Cope with Intermittent Malfunctions

P.00-13

).

NO :

Go to Step 2 .

STEP 2. Connector check: B-26 accelerator pedal
position sensor connector

Q: Is the check result normal?

YES :

Go to Step 3 .

NO :

Repair or replace the connector.

STEP 3. Perform resistance measurement at B-26
accelerator pedal position sensor connector.

• Disconnect connector, and measure at harness

side.

• Resistance between terminal No. 2 and earth.

OK: Continuity (2

Ω or less)

Q: Is the check result normal?

YES :

Go to Step 7 .

NO :

Go to Step 4 .

STEP 4. Connector check: A-08 engine-ECU
connector or engine-CVT-ECU connector

Q: Is the check result normal?

YES :

Go to Step 5 .

NO :

Repair or replace the connector.

AK203205

1

6 5 4 3 2

AD

Connector: B-26

B-26 (B)

B-26 Harness side
connector

AK203205

1

6 5 4 3 2

AD

Connector: B-26

B-26 (B)

B-26 Harness side
connector

AK402725

77

78

79

80

81

82

83

84

92

93

94

95

96

97

98

99

85

86

87

88

89

90

91

100

101

102

103

104

105

106

115

116

117

118

119

120

121

107

108

109

110

111

112

113

114

130

131

132

133

134

135

136

122

123

124

125

126

127

128

129

72 71

74 73

76 75

R

AG

A-08

Connector:

A-08

Harness side connector

Battery

Engine-ECU <M/T> or
engine-CVT-ECU <CVT>

Main

Index

Group

TOC

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4A9>

13A-207

STEP 5. Check harness between B-26 (terminal
No. 2) accelerator pedal position sensor
connector and A-08 (terminal No. 84) engine-ECU
connector or engine-CVT-ECU connector.

• Check earthing line for open circuit and damage.

Q: Is the check result normal?

YES :

Go to Step 6 .

NO :

Repair the damaged harness wire.

STEP 6. M.U.T.-III data list

• Refer to Data List Reference Table

P.13A-331

.

a. Item 78: Accelerator pedal position sensor

(main)

Q: Is the check result normal?

YES :

Intermittent malfunction (Refer to GROUP

00

− How to Use

Troubleshooting/Inspection Service Points

−

How to Cope with Intermittent Malfunctions

P.00-13

).

NO :

Replace the engine-ECU <M/T> or
engine-CVT-ECU <CVT>.

STEP 7. Replace the accelerator pedal assembly.

• After replacing the accelerator pedal assembly,

re-check the trouble symptoms.

Q: Is the check result normal?

YES :

Check end.

NO :

Replace the engine-ECU <M/T> or
engine-CVT-ECU <CVT>.

AK203205

1

6 5 4 3 2

AD

Connector: B-26

B-26 (B)

B-26 Harness side
connector

AK402725

77

78

79

80

81

82

83

84

92

93

94

95

96

97

98

99

85

86

87

88

89

90

91

100

101

102

103

104

105

106

115

116

117

118

119

120

121

107

108

109

110

111

112

113

114

130

131

132

133

134

135

136

122

123

124

125

126

127

128

129

72 71

74 73

76 75

R

AG

A-08

Connector:

A-08

Harness side connector

Battery

Engine-ECU <M/T> or
engine-CVT-ECU <CVT>

Main

Index

Group

TOC

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4A9>

13A-208

Code No. P2127: Accelerator Pedal Position Sensor (Sub) Circuit Low Input

OPERATION

• A power voltage of 2.5 V is applied to the acceler-

ator pedal position sensor (terminal No. 4) from
the engine-ECU <M/T> or engine-CVT-ECU
<CVT> (terminal No. 86).

• The power voltage is earthed to the engine-ECU

<M/T> or engine-CVT-ECU <CVT> (terminal No.
87) from the accelerator pedal position sensor
(terminal No. 5).

• The sensor signal is inputted to the engine-ECU

<M/T> or engine-CVT-ECU <CVT> (terminal No.
88) from the accelerator pedal position sensor
output terminal (terminal No. 6).

FUNCTION

• The accelerator pedal position sensor (sub) out-

puts voltage which corresponds to the accelera-
tor pedal depression.

• The engine-ECU <M/T> or engine-CVT-ECU

<CVT> checks whether the voltage is within a
specified range.

TROUBLE JUDGMENT

Check Condition

• Ignition switch is in "ON" position

Judgment Criteria

• Accelerator pedal position sensor (sub) output

voltage is 0.2 V or less <M/T>.

• Accelerator pedal position sensor (sub) output

voltage is 0.2 V or less for 1 second <CVT>.

AK402697

R

92 93 94 95969798

77 78 79 808182838485868788899091

99

100

107 108 109 110 111112113114115116117118119120121
122 123 124 125126127128129130131132133134135136

101102103104105106

71 72

73 74

75 76

6

1 2 3 4 5

5 V

86

4

Accelerator
pedal
position
sensor

(sub)

Hall IC

Y-R

BR

P-B

88

87

6

5

Accelerator Pedal Position Sensor (sub) Circuit

A-08

B-26

AC

Engine-ECU <M/T> or
engine-CVT-ECU <CVT>

Wire colour code
B: Black LG: Light green G: Green L: Blue W: White Y: Yellow SB: Sky blue BR: Brown O: Orange GR: Gray
R: Red P: Pink V: Violet Pu: Purple

Main

Index

Group

TOC

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4A9>

13A-209

PROBABLE CAUSES

• Failed accelerator pedal position sensor

• Open/short circuit in accelerator pedal position

sensor circuit or loose connector contact

• Failed engine-ECU <M/T> or engine-CVT-ECU

<CVT>

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III data list

• Refer to Data List Reference Table

P.13A-331

.

a. Item 77: Accelerator pedal position sensor

(sub)

Q: Is the check result normal?

YES :

Intermittent malfunction (Refer to GROUP

00

− How to Use

Troubleshooting/Inspection Service Points

−

How to Cope with Intermittent Malfunctions

P.00-13

).

NO :

Go to Step 2 .

STEP 2. Connector check: B-26 accelerator pedal
position sensor connector

Q: Is the check result normal?

YES :

Go to Step 3 .

NO :

Repair or replace the connector.

STEP 3. Perform voltage measurement at B-26
accelerator pedal position sensor connector.

• Disconnect connector, and measure at harness

side.

• Ignition switch: ON

• Voltage between terminal No. 4 and earth.

OK: 4.9

− 5.1 V

Q: Is the check result normal?

YES :

Go to Step 7 .

NO :

Go to Step 4 .

STEP 4. Connector check: A-08 engine-ECU
connector or engine-CVT-ECU connector

Q: Is the check result normal?

YES :

Go to Step 5 .

NO :

Repair or replace the connector.

AK203205

1

6 5 4 3 2

AD

Connector: B-26

B-26 (B)

B-26 Harness side
connector

AK203205

1

6 5 4 3 2

AD

Connector: B-26

B-26 (B)

B-26 Harness side
connector

AK402725

77

78

79

80

81

82

83

84

92

93

94

95

96

97

98

99

85

86

87

88

89

90

91

100

101

102

103

104

105

106

115

116

117

118

119

120

121

107

108

109

110

111

112

113

114

130

131

132

133

134

135

136

122

123

124

125

126

127

128

129

72 71

74 73

76 75

R

AG

A-08

Connector:

A-08

Harness side connector

Battery

Engine-ECU <M/T> or
engine-CVT-ECU <CVT>

Main

Index

Group

TOC