Mitsubishi Grandis. Manual — part 751
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-255
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.
STEP 5. Check harness between C-102 (terminal
No. 2) accelerator pedal position sensor
connector and C-113 (terminal No. 91)
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.
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
AK305627
1
6 5 4 3 2
Connector: C-102
AB
C-102 (B)
Harness side
connector
C-102 (B)
<L.H. drive vehicles>
<R.H. drive vehicles>
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-256
STEP 6. MUT-III data list
• Refer to Data List Reference Table
a. Item 78: Accelerator pedal 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. Replace the accelerator pedal assembly
• After replacing the accelerator pedal assembly,
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>.
Code No. P2127: Accelerator Pedal Position Sensor (Sub) Circuit Low Input
OPERATION
• A power voltage of 5 V is applied to the
accelerator pedal position sensor (terminal No. 4)
from the engine-ECU <M/T> or engine-A/T-ECU
<A/T> (terminal No. 97).
• The power voltage is earthed to the engine-ECU
<M/T> or engine-A/T-ECU <A/T> (terminal No.
96) from the accelerator pedal position sensor
(terminal No. 5).
AK305572
9192
939495
96979899
100
105
113114
115116117
118119120
106
107108109
110111112
101102103
104
6
1 2 3 4 5
AB
5 V
97
4
Accelerator
pedal
position
sensor
(sub)
Y
L
B-R
B-R
Engine-ECU <M/T> or
engine-A/T-ECU <A/T>
107
96
6
5
Accelerator pedal position sensor (sub) circuit
C-113
(MU803805)
C-102
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
31
33
J/C (4)
C-116
Hall IC
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-257
• The sensor signal is inputted to the engine-ECU
<M/T> or engine-A/T-ECU <A/T> (terminal No.
107) from the accelerator pedal position sensor
output terminal (terminal No. 6).
FUNCTION
• The accelerator pedal position sensor (sub)
outputs voltage which corresponds to the
accelerator pedal depression.
• The engine-ECU <M/T> or engine-A/T-ECU
<A/T> checks whether the voltage is within a
specified range.
TROUBLE JUDGMENT
Check Condition
• Ignition switch is in ON position
Judgment Criterion
• Accelerator pedal position sensor (sub) output
voltage is 0.2 volt or less for 1 second.
PROBABLE CAUSE
• Failed accelerator pedal position sensor
• Open/short circuit in accelerator pedal 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
a. Item 77: Accelerator pedal 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: C-102 accelerator
pedal position sensor connector
Q: Is the check result normal?
YES :
Go to Step 3 .
NO :
Repair or replace.
AK305627
1
6 5 4 3 2
Connector: C-102
AB
C-102 (B)
Harness side
connector
C-102 (B)
<L.H. drive vehicles>
<R.H. drive vehicles>
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-258
STEP 3. Perform voltage measurement at C-102
accelerator pedal position sensor connector.
• Disconnect connector, and measure at harness
side.
• Ignition switch: ON
• Voltage between terminal No. 4 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.
AK305627
1
6 5 4 3 2
Connector: C-102
AB
C-102 (B)
Harness side
connector
C-102 (B)
<L.H. drive vehicles>
<R.H. drive vehicles>
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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