Mitsubishi L200. Manual — part 140
TROUBLESHOOTING
DIESEL FUEL
13A-356
Code No. P2128: Accelerator Pedal Position Sensor (sub) Circuit High Input
OPERATION
• A power voltage of 5 V is applied to the accelera-
tor pedal position sensor (terminal No. 4) from the
engine-ECU (terminal No. 134).
• The power voltage is earthed to the engine-ECU
(terminal No. 136) from the accelerator pedal
position sensor (terminal No. 5).
• The sensor signal is inputted to the engine-ECU
(terminal No. 135) from the accelerator pedal
position sensor output terminal (terminal No. 6).
FUNCTION
• The accelerator pedal position sensor (sub) out-
puts voltage which corresponds to the accelera-
tor pedal depression.
• The engine-ECU checks whether the voltage is
within a specified range.
TROUBLE JUDGMENT
Check Conditions
• Battery positive voltage is 6 − 16 V
• 2 seconds later after the ignition switch has been
in "ON" position or the engine has started up
• Accelerator pedal position sensor (main) is nor-
mal
• Accelerator pedal position sensor (main) output
voltage is 0.2 V or higher and 2.8 V or lower.
Judgment Criterion
• Accelerator pedal position sensor (main) output
voltage exceeds 2.4 V for 0.3 seconds.
PROBABLE CAUSES
• Failed accelerator pedal position sensor
• Open circuit in accelerator pedal position sensor
circuit or loose connector contact
• Failed engine-ECU
AKA00110
6
1 2 3 4 5
101 102
103104 105 106107 108109 110 111112 113 114115
118119 120 121122 123124 125126127 128 129130
131132 133 134135 136137 138139140 141142 143
146147 148 149150 151152 153154155 156 157158
117
145
116
144
Accelerator Pedal Position Sensor (sub) Circuit
(sub)
Hall IC
Accelerator
pedal
position
sensor
C-115
(MU805200)
4
134
5 V
Y-R
6
135
L
5
136
B-Y
C-103
Wire colour code
B: Black LG: Light green G: Green L: Blue W: White Y: Yellow SB: Sky blue BR: Brown O: Orange GR: Grey
R: Red P: Pink V: Violet PU: Purple SI: Silver
Engine-ECU
AB
TROUBLESHOOTING
DIESEL FUEL
13A-357
DIAGNOSIS PROCEDURE
STEP 1. M.U.T.-III data list
• Refer to Data List Reference Table
.
a. Item 10: 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
− How to Cope
with Intermittent Malfunctions ).
NO :
Go to Step 2 .
STEP 2. Connector check: C-115 accelerator
pedal position sensor connector
Q: Is the check result normal?
YES :
Go to Step 3 .
NO :
Repair or replace the connector.
STEP 3. Perform resistance measurement at C-
115 accelerator pedal position sensor connector.
• Disconnect connector, and measure at harness
side.
• Resistance between terminal No. 5 and earth.
OK: Continuity (2
Ω or less)
Q: Is the check result normal?
YES :
Go to Step 7 .
NO :
Go to Step 4 .
AK700804
1
6 5 4 3 2
C-115 (B)
C-115 (B)
Connector: C-115
<R.H. drive vehicles>
<L.H. drive vehicles>
AB
Harness side connector
AK700804
1
6 5 4 3 2
C-115 (B)
C-115 (B)
Connector: C-115
<R.H. drive vehicles>
<L.H. drive vehicles>
AB
Harness side connector
TROUBLESHOOTING
DIESEL FUEL
13A-358
STEP 4. Connector check: C-103 engine-ECU
connector
Q: Is the check result normal?
YES :
Go to Step 5 .
NO :
Repair or replace the connector.
STEP 5. Check harness between C-115 (terminal
No. 5) accelerator pedal position sensor
connector and C-103 (terminal No. 136) engine-
ECU connector.
• Check earthing line for open circuit.
Q: Is the check result normal?
YES :
Go to Step 6 .
NO :
Repair the damaged harness wire.
AKA00090
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
146
147
148
149
150
151
152
153
154
155
156
157
158
117
145
116
144
C-103 (B)
C-103 (B)
<R.H. drive vehicles>
Harness side connector
<L.H. drive vehicles>
Connector: C-103
AB
AK700804
1
6 5 4 3 2
C-115 (B)
C-115 (B)
Connector: C-115
<R.H. drive vehicles>
<L.H. drive vehicles>
AB
Harness side connector
AKA00090
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
146
147
148
149
150
151
152
153
154
155
156
157
158
117
145
116
144
C-103 (B)
C-103 (B)
<R.H. drive vehicles>
Harness side connector
<L.H. drive vehicles>
Connector: C-103
AB
TROUBLESHOOTING
DIESEL FUEL
13A-359
STEP 6. M.U.T.-III data list
• Refer to Data List Reference Table
.
a. Item 10: 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
− How to Cope
with Intermittent Malfunctions ).
NO :
Replace the engine-ECU. When the engine-
ECU is replaced, write the chassis number
(Refer to GROUP 00
− Precautions Before
Service
− How to Perform Chassis Number
Writing ). After replacing the engine-ECU,
register the injector identification code and
learn fuel injection (Refer to GROUP 00
−
Precautions Before Service
− What The
Common Rail Engine Learns ). After
registering the injector identification code,
the vehicle equipped with the DPF carries
out the forcible DPF regeneration. (Refer to
GROUP 17
− Emission Control − Diesel
Particulate Filter (DPF) System
− Forcible
DPF Regeneration ).
STEP 7. Replace the accelerator pedal position
sensor
• After replacing the accelerator position sensor,
re-check the trouble symptoms.
Q: Is the check result normal?
YES :
The check is end.
NO :
Replace the engine-ECU. When the engine-
ECU is replaced, write the chassis number
(Refer to GROUP 00
− Precautions Before
Service
− How to Perform Chassis Number
Writing ). After replacing the engine-ECU,
register the injector identification code and
learn fuel injection (Refer to GROUP 00
−
Precautions Before Service
− What The
Common Rail Engine Learns ). After
registering the injector identification code,
the vehicle equipped with the DPF carries
out the forcible DPF regeneration. (Refer to
GROUP 17
− Emission Control − Diesel
Particulate Filter (DPF) System
− Forcible
DPF Regeneration ).
Code No. P2138: Accelerator Pedal Position Sensor (Main and Sub) Range/Performance Problem
OPERATION
• Refer to Code No. P2122: Accelerator Pedal
Position Sensor (main) Circuit Low Input
• Refer to Code No. P2127: Accelerator Pedal
Position Sensor (sub) Circuit Low Input
FUNCTION
• Engine-ECU checks the accelerator pedal posi-
tion sensor output signal characteristics for
abnormal conditions.
TROUBLE JUDGMENT
Check Condition
• Ignition switch is in "ON" position.
Judgment Criterion
• When an error is detected on the High side of the
accelerator pedal position (main) for 0.1 second,
the accelerator pedal position sensor (sub) is
faulty on the High/Low side.
Check Conditions
• Battery positive voltage is 6 − 16 V
• 2 seconds later after the ignition switch has been
in "ON" position or the engine has started up
• Engine speed is 600 r/min or more.
• Accelerator pedal position sensor (main) output
voltage is 0.2 V or higher and 4.8 V or lower.
• Accelerator pedal position sensor (sub) output
voltage is 0.125 V or higher and 2.375 V or lower.
Judgment Criterion
• When a change in the accelerator pedal position
sensor (sub) output voltage is less than the spec-
ified value for 0.2 second, the difference between
the opening indicated by the accelerator pedal
position sensor (main) and that by the accelerator
pedal position sensor (sub) is 18 % or more of the
specified value.
PROBABLE CAUSES
• Failed accelerator pedal position sensor
• Accelerator pedal position sensor circuit harness
damage or loose connector contact
• Failed engine-ECU
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