Mitsubishi Grandis. Manual - part 741

 

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Mitsubishi Grandis. Manual - part 741

 

 

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI)

13A-215

STEP 13. Connector check: B-06 
electronic-controlled throttle valve connector 
and C-114 engine-ECU <M/T> connector or 
engine-A/T-ECU <A/T> connector 

Q: Is the check result normal?

YES : 

Go to Step 14 .

NO : 

Repair or replace.

STEP 14. Check harness between B-06 (terminal 
No. 1) electronic-controlled throttle valve 
connector and C-114 (terminal No. 133) 
engine-ECU <M/T> connector or engine-A/T-ECU 
<A/T> connector.

• Check output line for short circuit and damage.

Q: Is the check result normal?

YES : 

Go to Step 15 .

NO : 

Repair.

AK300972

1

6 5 4 3 2

AC

Harness side connector

Connectors: B-06

B-06 (B)

AK305623AB

Connector: C-114

<L.H. drive vehicles>

<R.H. drive vehicles>

C-114 (GR)

C-114 (GR)

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

Harness side connector

AK300972

1

6 5 4 3 2

AC

Harness side connector

Connectors: B-06

B-06 (B)

AK305623AB

Connector: C-114

<L.H. drive vehicles>

<R.H. drive vehicles>

C-114 (GR)

C-114 (GR)

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

Harness side connector

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI)

13A-216

STEP 15. Check harness between B-06 (terminal 
No. 2) electronic-controlled throttle valve 
connector and C-114 (terminal No. 141) 
engine-ECU <M/T> connector or engine-A/T-ECU 
<A/T> connector.

• Check output line for short circuit and damage.

Q: Is the check result normal?

YES : 

Go to Step 16 .

NO : 

Repair.

STEP 16. Check the trouble symptoms.

Q: Does trouble symptom persist?

YES : 

Replace engine-ECU <M/T> or 

engine-A/T-ECU <A/T>.

NO : 

Intermittent malfunction (Refer to GROUP 
00 

− How to Use 

Troubleshooting/Inspection Service Points 

P.00-5

).

Code No. P0642: Throttle Position Sensor Power Supply

FUNCTION

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

checks the throttle position sensor power voltage 
for abnormal conditions.

TROUBLE JUDGMENT

Check Conditions

• Battery positive voltage is 6.3 V or higher.

Judgement Criteria

• Throttle position sensor power voltage is 4.1 V or 

less for 0.5 second.

AK300972

1

6 5 4 3 2

AC

Harness side connector

Connectors: B-06

B-06 (B)

AK305623AB

Connector: C-114

<L.H. drive vehicles>

<R.H. drive vehicles>

C-114 (GR)

C-114 (GR)

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

Harness side connector

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI)

13A-217

PROBALE CAUSE

• Failed engine-ECU <M/T>

• Failed engine-A/T-ECU <A/T>

DIAGNOSIS

STEP 1. Check the trouble symptoms.

Q: Does trouble symptom persist?

YES : 

Replace engine-ECU <M/T> or 

engine-A/T-ECU <A/T>.

NO : 

Intermittent malfunction (Refer to GROUP 
00 

− How to Use 

Troubleshooting/Inspection Service Points 

P.00-5

).

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI)

13A-218

Code No. P0657: Throttle Valve Control Servo Relay Circuit Malfunction

OPERATION

• Battery voltage is applied to the throttle valve 

control servo relay terminal (terminal No. 4).

• Battery voltage is applied to the throttle valve 

control servo relay terminal (terminal No. 3) from 
the engine control relay (terminal No. 1).

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

(terminal No. 15) applies current to the throttle 
valve control servo relay coil by turning ON the 
power transistor in the unit in order to turn the 
relay ON.

AK305568

1

2

3

4

1

2

3

4

1

2

3

5

6 7 8 9

4

20

21 22

232425

2627

10111213

14 15

16 1718

19

121122

123 124

125126127128129 130 131 132 133

134135

136137 138 139 140 141

142143

144

145 146

Throrrle
valve
control
servo
relay

Engine
control
relay

Power source

Battery

3

4

4

2

1

3

R-W

L

R-L

Y-G

W-G

W-G

W-G

R-W

2

1

15

132

AB

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

B-15X

B-12X

C-110

(MU803802)

C-114

(MU803801)

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

Throttle valve control servo relay circuit

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

 

 

 

 

 

 

 

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