Mitsubishi Grandis. Manual - part 699

 

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Mitsubishi Grandis. Manual - part 699

 

 

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI)

13A-47

STEP 8. Check harness between B-06 (terminal 
No. 5) electronic-controlled throttle valve 
connector and C-113 (terminal No. 106) 
engine-ECU <M/T> connector or engine-A/T-ECU 
<A/T> connector.

• Check power supply line for damage.

Q: Is the check result normal?

YES : 

Go to Step 9 .

NO : 

Repair.

STEP 9. Check harness between B-06 (terminal 
No. 4) electronic-controlled throttle valve 
connector and C-113 (terminal No. 115) 
engine-ECU <M/T> connector or engine-A/T-ECU 
<A/T> connector.

• Check output line for open/short circuit and 

damage.

Q: Is the check result normal?

YES : 

Go to Step 10 .

NO : 

Repair.

STEP 10. Replace the electronic-controlled 
throttle valve

• After replacing the electronic-controlled throttle 

valve, re-check the trouble symptoms.

Q: Is the check result normal?

YES : 

Check end.

NO : 

Replace engine-ECU <M/T> or 
engine-A/T-ECU <A/T>.

AK300972

1

6 5 4 3 2

AC

Harness side connector

Connectors: B-06

B-06 (B)

AK305616AB

Connector: C-113

<L.H. drive vehicles>

<R.H. drive vehicles>

C-113 (GR)

C-113 (GR)

91

92

93

94

95

96

97

98

99

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

Harness side connector

AK300972

1

6 5 4 3 2

AC

Harness side connector

Connectors: B-06

B-06 (B)

AK305616AB

Connector: C-113

<L.H. drive vehicles>

<R.H. drive vehicles>

C-113 (GR)

C-113 (GR)

91

92

93

94

95

96

97

98

99

100

101

102

103

104

105

106

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110

111

112

113

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115

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119

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Harness side connector

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI)

13A-48

Code No. P0123: Throttle Position Sensor  (Main) Circuit High Input

OPERATION

• A power voltage of 5 V is applied to the 

electronic-controlled throttle valve (terminal No. 
5) from the engine-ECU <M/T> or 
engine-A/T-ECU <A/T> (terminal No. 106).

• The power voltage is earthed to the engine-ECU 

<M/T> or engine-A/T-ECU <A/T> (terminal No. 
105) from the electronic-controlled throttle valve 
(terminal No. 3).

• The sensor signal is inputted to the engine-ECU 

<M/T> or engine-A/T-ECU <A/T> (terminal No. 
115) from the electronic-controlled throttle valve 
output terminal (terminal No. 4).

FUNCTION

• The throttle position sensor converts the throttle 

valve position into voltage and inputs it into the 
engine-ECU <M/T> or engine-A/T-ECU <A/T>.

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

<A/T> controls the throttle valve position.

TROUBLE JUDGMENT

Check Conditions

• Ignition switch is in "ON" position.

Judgment Criteria

• Throttle position sensor (main) output voltage is 

4.8 V or more for 0.5 second.

PROBABLE CAUSE

• Failed throttle position sensor (main)

AK305550

6

1 2 3 4 5

9192

939495

96979899

100

105

113114

115116117

118119120

106

107108109

110111112

101102103

104

AB

5 V

106

5

Electronic-controlled
throttle valve

B

B

G

R

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

115

105

4

3

Throttle position sensor (main) circuit

B-06

C-113

(MU803805)

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

(main)

Hall IC

C-115

7

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI)

13A-49

• Open/short circuit in throttle position sensor 

circuit or loose connector contact

• Failed engine-ECU <M/T>

• Failed engine-A/T-ECU <A/T>

DIAGNOSIS PROCEDURE

STEP 1. MUT-III data list

• Refer to Data List Reference Table 

P.13A-363

.

a. Item 79: Throttle position sensor (main)

Q: Is the check result normal?

YES : 

Intermittent malfunction (Refer to GROUP 

00 

− How to Use 

Troubleshooting/Inspection Service Points 

P.00-5

).

NO : 

Go to Step 2 .

STEP 2. Connector check: B-06 
electronic-controlled throttle valve connector

Q: Is the check result normal?

YES : 

Go to Step 3 .

NO : 

Repair or replace.

STEP 3. Perform resistance measurement at B-06 
electronic-controlled throttle valve connector.

• Disconnect connector, and measure at harness 

side.

• Resistance between terminal No. 3 and earth.

OK: 2 

 or less

Q: Is the check result normal?

YES : 

Go to Step 7 .

NO : 

Go to Step 4 .

STEP 4. Connector check: C-113 engine-ECU 
<M/T> connector or engine-A/T-ECU <A/T> 
connector

Q: Is the check result normal?

YES : 

Go to Step 5 .

NO : 

Repair or replace.

AK300972

1

6 5 4 3 2

AC

Harness side connector

Connectors: B-06

B-06 (B)

AK300972

1

6 5 4 3 2

AC

Harness side connector

Connectors: B-06

B-06 (B)

AK305616AB

Connector: C-113

<L.H. drive vehicles>

<R.H. drive vehicles>

C-113 (GR)

C-113 (GR)

91

92

93

94

95

96

97

98

99

100

101

102

103

104

105

106

107

108

109

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111

112

113

114

115

116

117

118

119

120

Harness side connector

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI)

13A-50

STEP 5. Check harness between B-06 (terminal 
No. 3) electronic-controlled throttle valve 
connector and C-113 (terminal No. 105) 
engine-ECU <M/T> connector or engine-A/T-ECU 
<A/T> connector.

• Check earthing line for open circuit and damage.

Q: Is the check result normal?

YES : 

Go to Step 6 .

NO : 

Repair.

STEP 6. MUT-III data list

• Refer to Data List Reference Table 

P.13A-363

.

a. Item 79: Throttle position sensor (main)

Q: Is the check result normal?

YES : 

Intermittent malfunction (Refer to GROUP 

00 

− How to Use 

Troubleshooting/Inspection Service Points 

P.00-5

).

NO : 

Replace engine-ECU <M/T> or 
engine-A/T-ECU <A/T>.

STEP 7. Replace the electronic-controlled 
throttle valve

• After replacing the electronic-controlled throttle 

valve, re-check the trouble symptoms.

Q: Is the check result normal?

YES : 

Check end.

NO : 

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

Code No. P0125: Feedback System Monitor

OPERATION

• Refer to Code No. P0201 No. 1 Injector System 

P.13A-115

.

Refer to Code No. P0202 No. 2 Injector System 

P.13A-120

.

Refer to Code No. P0203 No. 3 Injector System 

P.13A-125

.

Refer to Code No. P0204 No. 4 Injector System 

P.13A-130

.

• Refer to Code No. P0130 Cylinder 1, 4 Oxygen 

Sensor (Front) Circuit 

P.13A-57

.

• Refer to Code No. P0150 Cylinder 2, 3 Oxygen 

Sensor (Front) Circuit 

P.13A-82

.

AK300972

1

6 5 4 3 2

AC

Harness side connector

Connectors: B-06

B-06 (B)

AK305616AB

Connector: C-113

<L.H. drive vehicles>

<R.H. drive vehicles>

C-113 (GR)

C-113 (GR)

91

92

93

94

95

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97

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100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

Harness side connector

 

 

 

 

 

 

 

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