Mitsubishi Colt Ralliart. Manual - part 68

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4A9>

13A-226

STEP 4. M.U.T.-III diagnosis code

• Reconfirm whether the diagnosis code is output 

from engine-ECU <M/T> or engine-CVT-ECU 
<CVT>.

1. Erase the diagnosis code being output.
2. Ignition switch: LOCK (OFF) to ON
3. Confirm whether the diagnosis code is output. 

Q: Is the diagnosis code set?

YES : 

Replace ABS-ECU, then go to Step 6 .

NO : 

Intermittent malfunction in CAN busline 
between engine-ECU <M/T> or 
engine-CVT-ECU <CVT> and ABS-ECU 
(Refer to GROUP 00 

− How to Use 

Troubleshooting/Inspection Service Points 

− 

How to Cope with Intermittent Malfunctions 

P.00-13

).

STEP 5. M.U.T.-III diagnosis code

• Reconfirm whether the diagnosis code is output 

from engine-ECU <M/T> or engine-CVT-ECU 
<CVT>.

1. Erase the diagnosis code being output.
2. Ignition switch: LOCK (OFF) to ON
3. Confirm whether the diagnosis code is output.

Q: Is the diagnosis code set?

YES : 

Replace engine-ECU <M/T> or 

engine-CVT-ECU <CVT>, then go to Step 6 
.

NO : 

Intermittent malfunction in CAN busline 
between engine-ECU <M/T> or 
engine-CVT-ECU <CVT> and ABS-ECU 
(Refer to GROUP 00 

− How to Use 

Troubleshooting/Inspection Service Points 

− 

How to Cope with Intermittent Malfunctions 

P.00-13

).

STEP 6. M.U.T.-III diagnosis code

• Reconfirm whether the diagnosis code is output 

from engine-ECU <M/T> or engine-CVT-ECU 
<CVT>.

1. Erase the diagnosis code being output.
2. Ignition switch: LOCK (OFF) to ON
3. Confirm whether the diagnosis code is output.

Q: Is the diagnosis code set?

YES : 

Go to Step 1 .

NO : 

Check end.

Code No. U1106: EPS Time-Out

CAUTION

If the engine-ECU <M/T> or engine-CVT-ECU 
<CVT> outputs the diagnosis code U1106, always 
carry out diagnosis of the CAN busline.

CAUTION

Absolutely confirm that the communication cir-
cuit is normal and then replace the ECU.

TROUBLE JUDGMENT

Check Conditions

• Ignition switch is in "ON" position <M/T>.

• While the cranking switch is in OFF position, or 

when 3 seconds pass after the cranking switch is 
in OFF from ON.

• The battery voltage is 10 V or more.

Judgment Criterion

• The signal sent by the EPS-ECU is not able to be 

received through the CAN busline.

Comments on malfunction phenomenon

Current malfunction

• The possible causes are that the harness and the 

connector have malfunction in the CAN busline 
between the engine-ECU <M/T> or 
engine-CVT-ECU <CVT> and the EPS-ECU, the 
power supply system in the EPS-ECU has mal-
function, or the EPS-ECU/the engine-ECU <M/T> 
or engine-CVT-ECU <CVT> has malfunction.

Main

Index

Group

TOC

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4A9>

13A-227

Previous malfunction

• Focus on diagnosing that the harness and the 

connector have malfunction in the CAN busline 
between the engine-ECU <M/T> or 
engine-CVT-ECU <CVT> and the EPS-ECU, or 
the power supply system in the EPS-ECU has 
malfunction. The diagnosis procedure is referred 
to strategy for Intermittent malfunction (Refer to 
GROUP 00 - How to Use Troubleshoot-
ing/Inspection Service Points - How to Cope with 
Intermittent Malfunctions 

P.00-13

. 

NOTE: In the case of the previous malfunction, mal-

function cannot be found through the diagnose of 
M.U.T.-III CAN busline even if the CAN busline 
has malfunction; therefore check for the CAN 
busline in the same way as Intermittent malfunc-
tion (Refer to GROUP00 - How to Use Trouble-
shooting/Inspection Service Points - How to Cope 
with Intermittent Malfunctions 

P.00-13

. By the 

diagnosis code, which is output to the ECU where 
the CAN communication is performed, can nar-
row down the area to the most suspected place 

P.54D-13

.

PROBABLE CAUSES

• Failed harness and connector

• Failed EPS-ECU

• Failed engine-ECU <M/T> or engine-CVT-ECU 

<CVT>

DIAGNOSIS PROCEDURE

STEP 1. Diagnosis of M.U.T.-III CAN busline 

• Using M.U.T.-III, carry out diagnosis of the CAN 

busline.

Q: Is the check result normal?

YES : 

Go to Step 2 .

NO : 

Repair the CAN busline (Refer to GROUP 
54D 

− Diagnosis − Can Bus Diagnosis Table 

P.54D-13

). After repairing the CAN busline, 

go to Step 6 .

STEP 2. M.U.T.-III diagnosis code

• Confirm whether the EPS-ECU outputs the diag-

nosis code.

Q: Is the diagnosis code set?

YES : 

Carry out troubleshooting of the EPS. 

(Refer to GROUP 37 

− Check Chart for 

Diagnosis Codes 

P.37-9

.

NO : 

Go to Step 3 .

STEP 3. M.U.T.-III diagnosis code
Confirm whether the ECU indicated below, which 
carry out communication between the EPS-ECU and 
the CAN, outputs the diagnosis code U1106 
(EPS-ECU CAN Communication Time-out).

• Meter -A/C-ECU.

Q: Is the diagnosis code set?

YES : 

Go to Step 4 .

NO : 

Go to Step 5 .

STEP 4. M.U.T.-III diagnosis code

• Reconfirm whether the diagnosis code is output 

from engine-ECU <M/T> or engine-CVT-ECU 
<CVT>.

1. Clear the diagnosis code being output.
2. Ignition switch: LOCK (OFF) to ON
3. Confirm whether the diagnosis code is output.

Q: Is the diagnosis code set?

YES : 

Replace EPS-ECU, then go to Step 6 .

NO : 

Intermittent malfunction (Refer to GROUP 
00 

− How to Use 

Troubleshooting/Inspection Service Points 

− 

How to Cope with Intermittent Malfunctions 

P.00-13

).

STEP 5. M.U.T.-III diagnosis code

• Reconfirm whether the diagnosis code is output 

from engine-ECU <M/T> or engine-CVT-ECU 
<CVT>.

1. Clear the diagnosis code being output.
2. Ignition switch: LOCK (OFF) to ON
3. Confirm whether the diagnosis code is output.

Q: Is the diagnosis code set?

YES : 

Replace engine-ECU <M/T> or 

engine-CVT-ECU <CVT>, then go to Step 6 
.

NO : 

Intermittent malfunction (Refer to GROUP 
00 

− How to Use 

Troubleshooting/Inspection Service Points 

− 

How to Cope with Intermittent Malfunctions 

P.00-13

).

STEP 6. M.U.T.-III diagnosis code

• Reconfirm whether the diagnosis code is output 

from engine-ECU <M/T> or engine-CVT-ECU 
<CVT>.

1. Clear the diagnosis code being output.
2. Ignition switch: LOCK (OFF) to ON
3. Confirm whether the diagnosis code is output.

Q: Is the diagnosis code set?

YES : 

Go to Step 1 .

NO : 

Check end.

Main

Index

Group

TOC

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4A9>

13A-228

Code No. U1108: Combination Meter Time-out

CAUTION

If diagnosis code U1108 is output from 
engine-ECU <M/T> or engine-CVT-ECU <CVT>, 
surely perform CAN busline diagnosis.

CAUTION

Replace ECU after certainly confirming that the 
communication circuits are normal.

TROUBLE JUDGMENT

Check Conditions

• Ignition switch is in "ON" position <M/T>.

• While the cranking switch is in OFF position, or 

when 3 seconds pass after the cranking switch is 
in OFF from ON.

• The battery voltage is 10 V or more.

Judgment Criterion

• The signals cannot be received from combination 

meter through CAN busline.

COMMENT ON TROUBLE SYMPTOM

Current malfunction

• The failure is possibly caused by malfunction of 

the harness and connector in CAN busline 
between engine-ECU <M/T> or engine-CVT-ECU 
<CVT> and combination meter, by malfunction in 
the power supply system of combination meter, in 
combination meter itself, in engine-ECU <M/T> or 
engine-CVT-ECU <CVT>.

Past malfunction

• Focus on diagnosing malfunction of the harness 

and connector in CAN busline between 
engine-ECU <M/T> or engine-CVT-ECU <CVT> 
and combination meter as well as malfunction in 
the power supply system of combination meter 
(Refer to GROUP 00 

− How to Use Troubleshoot-

ing/Inspection Service Points 

− How to Cope with 

Intermittent Malfunctions 

P.00-13

).

NOTE: In case of Past malfunction, M.U.T.-III CAN 

bus diagnosis cannot detect the failure even if 
there is malfunction in CAN bus, so that check 
CAN busline in the same way as Intermittent mal-
function (Refer to GROUP 00 

−

 How to Use Trou-

bleshooting/Inspection Service Points 

−

 How to 

Cope with Intermittent Malfunctions 

P.00-13

). 

The diagnosis codes being output to each ECU 
with CAN communication can narrow down the 
most suspected area (Refer to GROUP 54D 

−

 

Diagnosis 

−

 Can Bus Diagnosis Table 

P.54D-13

).

PROBABLE CAUSES

• Failed harness and connector in CAN busline

• Failed combination meter 

• Failed engine-ECU <M/T> or engine-CVT-ECU 

<CVT>

DIAGNOSIS

STEP 1. M.U.T.-III CAN bus diagnosis

• Using M.U.T.-III, perform CAN busline diagnosis.

Q: Is the check result normal?

YES : 

Go to Step 2 .

NO : 

Correct CAN busline (Refer to GROUP 54D 
− Diagnosis − CAN Bus Diagnosis Table 

P.54D-13

), and then go to Step 6 .

STEP 2. M.U.T.-III other system diagnosis code

• Confirm whether the diagnosis code is output 

from combination meter.

Q: Is the diagnosis code set?

YES : 

Perform the troubleshooting of combination 

meter (Refer to GROUP 54A 

− Combination 

Meter 

− Check Chart for Diagnosis Codes 

P.54A-31

).

NO : 

Go to Step 3 .

STEP 3. M.U.T.-III other system diagnosis code
Confirm whether diagnosis code U1108: combination 
meter time-out is output from the following ECU hav-
ing CAN communication with combination meter

• ETACS-ECU

Q: Is the diagnosis code set?

YES : 

Go to Step 4 .

NO : 

Go to Step 5 .

Main

Index

Group

TOC

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4A9>

13A-229

STEP 4. M.U.T.-III diagnosis code

• Reconfirm whether the diagnosis code is output 

from engine-ECU <M/T> or engine-CVT-ECU 
<CVT>.

1. Erase the diagnosis code being output.
2. Ignition switch: LOCK (OFF) to ON
3. Confirm whether the diagnosis code is output.

Q:  Is the diagnosis code set?

YES : 

Replace combination meter, then go to Step 

6 .

NO : 

Intermittent malfunction in CAN busline 
between engine-ECU <M/T> or 
engine-CVT-ECU <CVT> and combination 
meter (Refer to GROUP 00 

− How to Use 

Troubleshooting/Inspection Service Points 

− 

How to Cope with Intermittent Malfunctions 

P.00-13

).

STEP 5. M.U.T.-III diagnosis code

• Reconfirm whether the diagnosis code is output 

from engine-ECU <M/T> or engine-CVT-ECU 
<CVT>.

1. Erase the diagnosis code being output.
2. Ignition switch: LOCK (OFF) to ON
3. Confirm whether the diagnosis code is output.

Q: Is the diagnosis code set?

YES : 

Replace engine-ECU <M/T> or 

engine-CVT-ECU <CVT>, go to Step 6 .

NO : 

Intermittent malfunction in CAN busline 
between engine-ECU <M/T> or 
engine-CVT-ECU <CVT> and combination 
meter (Refer to GROUP 00 

− How to Use 

Troubleshooting/Inspection Service Points 

− 

How to Cope with Intermittent Malfunctions 

P.00-13

). 

STEP 6. M.U.T.-III diagnosis code

• Reconfirm whether the diagnosis code is output 

from engine-ECU <M/T> or engine-CVT-ECU 
<CVT>.

1. Erase the diagnosis code being output.
2. Ignition switch: LOCK (OFF) to ON
3. Confirm whether the diagnosis code is output.

Q:  Is the diagnosis code set?

YES : 

Go to Step 1 .

NO : 

Check end.

Code No. U1110: A/C-ECU Time-Out

CAUTION

If diagnosis code U1110 is output from 
engine-ECU <M/T> or engine-CVT-ECU <CVT>, 
surely perform CAN busline diagnosis.

CAUTION

Replace ECU after certainly confirming that the 
communication circuits are normal.

TROUBLE JUDGMENT

Check Conditions

• Ignition switch is in "ON" position <M/T>.

• While the cranking switch is in OFF position, or 

when 3 seconds pass after the cranking switch is 
in OFF from ON.

• The battery voltage is 10 V or more.

Judgment Criterion

• The signals cannot be received from A/C-ECU 

through CAN busline.

COMMENT ON TROUBLE SYMPTOM

Current malfunction

• The failure is possibly caused by malfunction of 

the harness and connector in CAN busline 
between engine-ECU <M/T> or engine-CVT-ECU 
<CVT> and A/C-ECU, by malfunction in the 
power supply system of A/C-ECU, in A/C-ECU 
itself, in engine-ECU <M/T> or engine-CVT-ECU 
<CVT>.

Past malfunction

• Focus on diagnosing malfunction of the harness 

and connector in CAN busline between 
engine-ECU <M/T> or engine-CVT-ECU <CVT> 
and A/C-ECU as well as malfunction in the power 
supply system of A/C-ECU (Refer to GROUP 00 
− How to Use Troubleshooting/Inspection Service 
Points 

− How to Cope with Intermittent Malfunc-

tions 

P.00-13

). 

Main

Index

Group

TOC