Mitsubishi Grandis. Manual — part 747
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-239
Code No. P2101: Throttle Valve Control Servo Magneto Malfunction
OPERATION
• Controls the current that is applied from the
engine-ECU <M/T> or engine-A/T-ECU <A/T>
(terminals No. 133, No. 141) to the
electronic-controlled throttle valve (terminals No.
1, No. 2).
FUNCTION
• Engine-ECU <M/T> or engine-A/T-ECU <A/T>
check whether the throttle valve control servo
magneto failed.
TROUBLE JUDGMENT
Check Condition
• Battery positive voltage is 8.3 V or higher.
Judgement Criterion
• The coil temperature of the throttle actuator
control motor is 180
°C or higher for 0.8 second.
PROBABLE CAUSE
• Failed throttle valve control servo.
• Open/short circuit in throttle valve control servo
circuit or lose connector contact.
• Failed engine-ECU <M/T>
• Failed engine-A/T-ECU <A/T>
AK305730
6
1 2 3 4 5
121122
123 124
125126127128129 130 131 132 133
134135
136137 138 139 140 141
142143
144
145 146
AB
133
1
L-Y
R-L
Engine-ECU <M/T> or
engine-A/T-ECU <A/T>
141
2
B-06
Throttle valve control servo circuit
C-114
(MU803801)
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
Electronic-controlled
throttle valve
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-240
DIAGNOSIS PROCEDURE
STEP 1. Connector check: B-06
electronic-controlled throttle valve connector
Q: Is the check result normal?
YES :
Go to Step 2 .
NO :
Repair or replace.
STEP 2. Perform resistance measurement at B-06
electronic-controlled throttle valve connector.
• Disconnect connector, and measure at
electronic-controlled throttle valve side.
• Resistance between terminal No. 1 and No. 2.
OK: 0.3
− 100 kΩ (at 20 °C)
Q: Is the check result normal?
YES :
Go to Step 3 .
NO :
Replace throttle body assembly.
STEP 3. Connector check: 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 4 .
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)
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-241
STEP 4. 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 5 .
NO :
Repair.
STEP 5. 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 6 .
NO :
Repair.
STEP 6. Check the trouble symptoms.
Q: Is the check result normal?
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
).
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-242
Code No. P2102: Throttle Valve Control Servo Circuit (Shorted Low)
OPERATION
• Controls the current that is applied from the
engine-ECU <M/T> or engine-A/T-ECU<A/T>
(terminals No. 133, No. 141) to the
electronic-controlled throttle valve (terminals No.
1, No. 2).
FUNCTION
• Engine-ECU <M/T> or engine-A/T-ECU <A/T>
varies the direction and the amperage of the
current that is applied to the throttle valve control
servo in order to control the opening of the
throttle valve.
TROUBLE JUDGMENT
Check Condition
• Battery positive voltage is 8.3 V or higher.
Judgement Criterion
• Throttle valve control servo current is 12 A or
higher for 0.8 second.
PROBABLE CAUSE
• Failed throttle valve control servo.
• Short circuit in throttle valve control servo circuit
or lose connector contact.
• Failed engine-ECU <M/T>
• Failed engine-A/T-ECU <A/T>
AK305730
6
1 2 3 4 5
121122
123 124
125126127128129 130 131 132 133
134135
136137 138 139 140 141
142143
144
145 146
AB
133
1
L-Y
R-L
Engine-ECU <M/T> or
engine-A/T-ECU <A/T>
141
2
B-06
Throttle valve control servo circuit
C-114
(MU803801)
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
Electronic-controlled
throttle valve
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