Mitsubishi Colt Ralliart. Manual — part 717
![](/vehicles/winoney/ama/flend/quscletabe.png)
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI) <4G1>
13B-193
STEP 10. Check harness between A-101 (terminal
No. 2) oil feeder control valve connector and
A-114 (terminal No. 52) engine-ECU connector.
•
Check output line for damage.
Q: Is the check result normal?
YES :
Go to Step 11.
NO :
Repair.
STEP 11. M.U.T.-III diagnosis code
• Reconfirmation of diagnosis code.
Q: Is the diagnosis code output?
YES :
Replace engine-ECU.
NO :
Intermittent malfunction (Refer to GROUP
00
− How to Use Troubleshooting/Inspection
Service Points
− How to Cope with
Intermittent Malfunctions
).
AK402099
1
2
AC
Harness side
connector
Connector: A-101
A-101(B)
AK402745
6
4
2
5
3
1
9
7
8
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
L
AF
A-114
Connector:
A-114
Harness side connector
Engine-ECU
Battery
Main
Index
Group
TOC
![](/vehicles/winoney/ama/flend/llantoun.png)
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI) <4G1>
13B-194
Code No. P1231: Trustful Check ASC <Vehicle with ASC>
FUNCTION
• Confirm abnormal signals of ASC through CAN
communication.
TROUBLE JUDGMENT
Check Condition
• Ignition switch is "ON" position.
Judgment Criterion
• The torque request signal from ASC-ECU is
abnormal.
PROBABLE CAUSES
• Failed ASC-ECU
• Failed CAN
• Failed engine-ECU
DIAGNOSIS PROCEDURE
STEP 1. M.U.T.-III diagnosis code
Q: Is diagnosis code related with CAN communication
displayed?
YES :
Inspection chart for diagnosis code (Refer
to
NO :
Go to Step 2 .
STEP 2. M.U.T.-III other system diagnosis code
• Confirm whether the diagnosis codes are output
from ASC-ECU.
Q: Is the diagnosis code output?
YES :
Perform the troubleshooting of ASC (Refer
to Group 35C
− Troubleshooting −
Diagnosis Code Chart
NO :
Replace engine-ECU.
Code No. P1233: Trustful Check Throttle Position Sensor (Main)
FUNCTION
• Compare the actual measurement of volumetric
efficiency by an air flow sensor signal with volu-
metric efficiency estimated from a throttle position
sensor (main) signal.
TROUBLE JUDGMENT
Check Conditions
• Ignition switch is in "ON" position.
• The air flow sensor is normal.
Judgment Criterion
• The difference between volumetric efficiency
(actual measurement) by the air flow sensor and
volumetric efficiency estimated from the throttle
position sensor (main) exceeds the specified
value.
PROBABLE CAUSES
• Failed throttle position sensor (main)
• Harness damage in throttle position sensor
(main) circuit or loose connector contact
• Failed intake air system
• Failed engine-ECU
DIAGNOSIS PROCEDURE
STEP 1. M.U.T.-III diagnosis code
Q: Is any other diagnosis code than P1233 output?
YES :
Inspection chart for diagnosis code (Refer
to
NO :
Go to Step 2 .
STEP 2. M.U.T.-III data list
• Refer to Data List Reference Table
.
a. Item No. 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
−
How to Cope with Intermittent Malfunctions
).
NO :
Go to Step 3 .
STEP 3. Check air intake from intake hose and
inlet manifold.
Q: Is the check result normal?
YES :
Replace the engine-ECU.
NO :
Repair.
Main
Index
Group
TOC
![](/vehicles/winoney/ama/flend/thestw.png)
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI) <4G1>
13B-195
Code No. P1234: Trustful Check Throttle Position Sensor (Sub)
FUNCTION
• Compare the actual measurement of volumetric
efficiency by an air flow sensor signal with volu-
metric efficiency estimated from a throttle position
sensor (sub) signal.
TROUBLE JUDGMENT
Check Conditions
• Ignition switch is in "ON" position.
• The air flow sensor is normal.
Judgment Criterion
• The difference between volumetric efficiency
(actual measurement) by the air flow sensor and
volumetric efficiency estimated from the throttle
position sensor (sub) exceeds the specified
value.
PROBABLE CAUSES
• Failed throttle position sensor (sub)
• Harness damage in throttle position sensor (sub)
circuit or loose connector contact
• Failed intake air system
• Failed engine-ECU
DIAGNOSIS PROCEDURE
STEP 1. M.U.T.-III diagnosis code
Q: Is any other diagnosis code than P1234 output?
YES :
Inspection chart for diagnosis code (Refer
to
NO :
Go to Step 2 .
STEP 2. M.U.T.-III data list
• Refer to Data List Reference Table
.
a. Item No. 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
−
How to Cope with Intermittent Malfunctions
).
NO :
Go to Step 3 .
STEP 3. Check air intake from intake hose and
inlet manifold.
Q: Is the check result normal?
YES :
Replace the engine-ECU.
NO :
Repair.
Code No. P1235: Trustful Check Air Flow Sensor
FUNCTION
• Compare the actual measurement of volumetric
efficiency by an air flow sensor signal with volu-
metric efficiency estimated from a throttle position
sensor (main or sub) signal.
TROUBLE JUDGMENT
Check Conditions
• While engine is running.
• The throttle position sensor (main or sub) is nor-
mal.
• The air flow sensor is normal.
Judgment Criteria
• The difference between volumetric efficiency esti-
mated from the throttle position sensor (main)
and volumetric efficiency estimated from the
throttle position sensor (sub) exceeds the speci-
fied value.
• The difference between volumetric efficiency
(actual measurement) by the air flow sensor and
volumetric efficiency estimated from the throttle
position sensor (main) exceeds the specified
value.
• The difference between volumetric efficiency
(actual measurement) by the air flow sensor and
volumetric efficiency estimated from the throttle
position sensor (sub) exceeds the specified
value.
PROBABLE CAUSES
• Failed air flow sensor
• Damage in air flow sensor circuit or loose con-
nector contact
• Failed intake air system
• Failed engine-ECU
Main
Index
Group
TOC
![](/vehicles/winoney/ama/flend/cuso.png)
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI) <4G1>
13B-196
DIAGNOSIS PROCEDURE
STEP 1. M.U.T.-III diagnosis code
Q: Is any other diagnosis code than P1235 output?
YES :
Inspection chart for diagnosis code (Refer
to
NO :
Go to Step 2 .
STEP 2. M.U.T.-III data list
• Refer to Data List Reference Table
.
a. Item No. 12: Air flow sensor
Q: Is the check result normal?
YES :
Replace the engine-ECU.
NO :
Check air flow sensor system (Refer to
Code No. P0
Code No. P1236: AD Converter
FUNCTION
• The input voltage from the accelerator pedal posi-
tion sensor (sub) is monitored whether which is
converted normally into the digital signal within
engine-ECU.
TROUBLE JUDGMENT
Check Condition
• Ignition switch is "ON" position.
Judgment Criterion
• When the input voltage from the accelerator
pedal position sensor (sub) is periodically 0 V, the
input voltage digital value shows more than 0.2 V.
PROBABLE CAUSE
• Failed engine-ECU
DIAGNOSIS PROCEDURE
STEP 1. M.U.T.-III diagnosis code
• After clearing the diagnosis code through
M.U.T.-III, ignition switch is "ON" position and
confirm whether the diagnosis code is output.
Q: Diagnosis code set?
YES :
Replace engine-ECU.
NO :
Intermittent malfunction (Refer to GROUP
00
− How to Use
Troubleshooting/Inspection Service Points
−
How to Cope with Intermittent Malfunctions
).
Code No. P1237: Trustful Check Accelerator Pedal Position Sensor
FUNCTION
• Compare accelerator pedal position sensor
(main) output with accelerator pedal position sen-
sor (sub) one.
TROUBLE JUDGMENT
Check Conditions
• Ignition switch is "ON" position.
Judgment Criteria
• Difference is more than specified value between
output voltage of accelerator pedal position sen-
sor (main) and output voltage multiplied by 2 of
accelerator pedal position sensor (sub).
• When accelerator pedal position sensor (main)
output voltage is constant, change amount of
accelerator pedal position sensor (sub) output
voltage is more than specified value.
PROBABLE CAUSES
• Failed accelerator pedal position sensor
• Damaged accelerator pedal position sensor cir-
cuit
• Failed engine-ECU
DIAGNOSIS PROCEDURE
STEP 1. M.U.T.-III diagnosis code
Q: Diagnosis code set?
YES :
Inspection chart for diagnosis code (Refer
to
NO :
Go to Step 2 .
Main
Index
Group
TOC
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст