Mitsubishi Grandis. Manual — part 721
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-135
Code No. P0222: Throttle Position Sensor (Sub) Circuit Low 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.
113) from the electronic-controlled throttle valve
output terminal (terminal No. 6).
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 Condition
• Ignition switch is in ON position.
Judgment Criterion
• Throttle position sensor (sub) output voltage is
2.25 V or less for 0.5 second.
PROBABLE CAUSE
• Failed throttle position sensor (sub)
AK305560
6
1 2 3 4 5
9192
939495
96979899
100
105
113114
115116117
118119120
106
107108109
110111112
101102103
104
(sub)
Hall IC
AB
5 V
106
5
B
C-115
W
B
R
Engine-ECU <M/T> or
engine-A/T-ECU <A/T>
113
105
7
6
3
Throttle position sensor (sub) 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
Electronic-controlled
throttle valve
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-136
• Open/short circuit in throttle position sensor (sub)
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
a. Item 14: Throttle position sensor (sub)
Q: Is the check result normal?
YES :
Intermittent malfunction (Refer to GROUP
00
− How to Use
Troubleshooting/Inspection Service Points
).
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 voltage measurement at B-06
electronic-controlled throttle valve connector.
• Disconnect connector, and measure at harness
side.
• Ignition switch: ON
• Voltage between terminal No. 5 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: 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
110
111
112
113
114
115
116
117
118
119
120
Harness side connector
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-137
STEP 5. 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 open/short 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
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
).
NO :
Replace engine-ECU <M/T> or
engine-A/T-ECU <A/T>.
STEP 7. 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 8 .
NO :
Repair or replace.
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
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-138
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. 6) electronic-controlled throttle valve
connector and C-113 (terminal No. 113)
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
107
108
109
110
111
112
113
114
115
116
117
118
119
120
Harness side connector
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