Mitsubishi Grandis. Manual - part 705

 

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Mitsubishi Grandis. Manual - part 705

 

 

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI)

13A-71

STEP 3. Perform resistance measurement at B-23 
cylinder 1, 4 oxygen sensor (rear) connector.

• Disconnect connector, and measure at harness 

side.

• Resistance between terminal No. 2 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.

AK300975

1

2

3

4

AC

B-23 (B)

Connector: B-23

Harness side
connector

Cylinder 1, 4 oxygen
sensor (rear)

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

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI)

13A-72

STEP 5. Check harness between B-23 (terminal 
No. 2) cylinder 1, 4 oxygen sensor (rear) 
connector and C-113 (terminal No. 96) 
engine-ECU <M/T> connector or engine-A/T-ECU 
<A/T> connector.

• Check earthing line for open circuit.

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 59: Cylinder 1, 4 oxygen sensor (rear)

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. Perform voltage measurement at B-23 
cylinder 1, 4 oxygen sensor (rear) connector.

• Use special tool test harness (MD998464) to 

connect connector, and measure at pick-up 
harness.

• Engine: After warm-up

• Transmission: Neutral <M/T> or P range <A/T>

• Voltage between terminal No. 4 and earth.

OK:

When the engine is 2,500 r/min, the output 

voltage should repeat 0 to 0.8 V alternately

Q: Is the check result normal?

YES : 

Go to Step 10 .

NO : 

Go to Step 8 .

AK300975

1

2

3

4

AC

B-23 (B)

Connector: B-23

Harness side
connector

Cylinder 1, 4 oxygen
sensor (rear)

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

AK300975

1

2

3

4

AC

B-23 (B)

Connector: B-23

Harness side
connector

Cylinder 1, 4 oxygen
sensor (rear)

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI)

13A-73

STEP 8. Check Cylinder 1, 4 oxygen sensor (rear) 
itself.

• Check cylinder 1, 4 oxygen sensor (rear) itself 

(Refer to 

P.13A-391

).

Q: Is the check result normal?

YES : 

 Go to Step 9 .

NO : 

Replace cylinder 1, 4 oxygen sensor (rear).

STEP 9. Connector check: C-113 engine-ECU 
<M/T> connector or engine-A/T-ECU <A/T> 
connector

Q: Is the check result normal?

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

AK300975

1

2

3

4

AC

B-23 (B)

Connector: B-23

Harness side
connector

Cylinder 1, 4 oxygen
sensor (rear)

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI)

13A-74

YES : 

Check and repair harness between B-23 

(terminal No. 4) cylinder 1, 4 oxygen sensor 
(rear) connector and C-113 (terminal No. 
117) engine-ECU <M/T> connector or 
engine-A/T-ECU <A/T> connector.

• Check output line for damage.

NO : 

Repair or replace.

STEP 10. Perform voltage measurement at C-113 
engine-ECU <M/T> connector or engine-A/T-ECU 
<A/T> connector.

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

<A/T> terminal voltage.

• Transmission: Neutral <M/T> or P range <A/T>

• Engine: After warm-up

• Voltage between terminal No. 117 and earth.

OK:

When the engine is 2,500 r/min, the output 

voltage should repeat 0 to 0.8 V alternately.

Q: Is the check result normal?

YES : 

Go to Step 12 .

NO : 

Go to Step 11 .

STEP 11. Connector check: C-113 engine-ECU 
<M/T> connector or engine-A/T-ECU <A/T> 
connector

Q: Is the check result normal?

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

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

AK300975

1

2

3

4

AC

B-23 (B)

Connector: B-23

Harness side
connector

Cylinder 1, 4 oxygen
sensor (rear)

 

 

 

 

 

 

 

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