Mitsubishi Evolution X. Manual - part 222

AUTO-CRUISE CONTROL

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ENGINE AND EMISSION CONTROL

17-57

CAUTION

• If there is any problem in the CAN bus lines, an incor-

rect DTC may be set. Prior to this diagnosis, diagnose 
the CAN bus lines.

• Whenever the ECM is replaced, ensure that the CAN 

bus lines are normal.

STEP 1. Using scan tool MB991958, diagnose the CAN bus 
line.

AC608435

Data link connector

MB991827

MB991824

MB991910

AB

CAUTION

To prevent damage to scan tool MB991958, always turn the 
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958 to the data link connector 

(Refer to 

P.17-10

).

(2) Turn the ignition switch to the "ON" position.
(3) Diagnose the CAN bus line (Refer to 

P.17-10

).

(4) Turn the ignition switch to the "LOCK" (OFF) position.
(5) Disconnect scan tool MB991958.
Q: Is the check result satisfactory?

YES : Go to Step 2
NO :  Repair the CAN bus lines (Refer to GROUP 54C, 

Diagnosis 

− Can Bus Diagnostic Chart 

P.54C-14

). 

Then go to Step 6.

STEP 2. Using scan tool MB991958, check for MFI system 
DTC.
(1) Connect scan tool MB991958 to the data link connector 

(Refer to 

P.17-10

).

(2) Turn the ignition switch to the "ON" position.
(3) Check for MFI system DTC (Refer to GROUP 13A, 

Diagnosis 

− Diagnostic Function 

P.13A-9

).

(4) Turn the ignition switch to the "LOCK" (OFF) position.
(5) Disconnect scan tool MB991958.
Q: Is DTC U0141 set?

YES : Refer to GROUP 13A, Diagnosis, Diagnostic Trouble 

Code Procedures 

− DTC U0141: ETACS-ECU CAN 

Communication Time Out 

P.13A-727

. Then go to Step 

6 .

NO :  Go to Step 3.

AUTO-CRUISE CONTROL

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ENGINE AND EMISSION CONTROL

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STEP 3. Using scan tool MB991958, check for ETACS 
system DTC.
(1) Connect scan tool MB991958 to the data link connector 

(Refer to 

P.17-10

).

(2) Turn the ignition switch to the "ON" position.
(3) Check for ETACS system DTC (Refer to GROUP 54A, 

ETACS, Troubleshooting 

− Diagnostic Function 

P.54A-579

).

(4) Turn the ignition switch to the "LOCK" (OFF) position.
(5) Disconnect scan tool MB991958.
Q: Is DTC U0155 set?

YES : Refer to GROUP 54A, ETACS, Troubleshooting, 

Diagnostic Trouble Code Procedures 

− DTC U0155: 

Combination Meter-ECU CAN Communication Time 
Out 

P.54A-601

. Then go to Step 6.

NO :  Go to Step 4.

STEP 4. Using scan tool MB991958, check the combination 
meter system data list item F7: Cruise control indicator.
(1) Connect scan tool MB991958 to the data link connector 

(Refer to 

P.17-10

).

(2) Turn the ignition switch to the "ON" position.
(3) Set scan tool MB991958 to data reading mode for 

combination meter system item F7: Cruise control indicator 
(Refer to GROUP 54A, Combination Meter 

− Data List 

Reference Table 

P.54A-78

).

(4) Turn the ignition switch to the "LOCK" (OFF) position.
(5) Disconnect scan tool MB991958.
Q: Is the check result satisfactory?

YES : Go to Step 5.
NO :  Repair the combination meter system (Refer to 

GROUP 54A, Combination Meter, Troubleshooting, 
Symptom Procedures 

− Inspection Procedure 5: The 

combination meter light does not illuminate normally 
or the multi information display is not displayed 
normally 

P.54A-72

). Then go to Step 6 .

STEP 5. Retest the system.
Q: Does the "CRUISE" indicator light illuminate when the 

"ON/OFF" switch is turned ON?
YES : It can be assumed that this malfunction is intermittent 

(Refer to GROUP 00, How to Use 
Troubleshooting/Inspection Service Points 

− How to 

Cope with Intermittent Malfunction 

P.00-15

).

NO :  Replace the ECM [Refer to GROUP 13A, Engine 

Control Module (ECM) 

P.13A-920

]. When the ECM is 

replaced, register the encrypted code (Refer to 
GROUP 42C, Diagnosis 

− ID Code Registration 

Judgment Table 

P.42C-9

). Then go to Step 6.

AUTO-CRUISE CONTROL

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ENGINE AND EMISSION CONTROL

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STEP 6. Retest the system.
Q: Does the "CRUISE" indicator light illuminate when the 

"ON/OFF" switch is turned ON?
YES : The procedure is complete.
NO :  Return to Step 1.

DATA LIST REFERENCE TABLE

M1172002401106

CAUTION

• Driving tests always need two people: one driver and one observer.
• When shifting the shift lever to "D" range the brakes should be applied so that the vehicle does 

not move forward.

NOTE: *:After the inspection is completed, disconnect the TP sensor connector, and then delete the DTC 
using scan tool MB991958 (Refer to GROUP 13A, Diagnostic Function 

−

 How to Read and Erase Diagnostic 

Trouble Code 

P.13A-9

).

Scan tool 
display

Item 
num
ber

Inspection item

Inspection requirement

Normal condition

APP sensor 
(main)

11

Accelerator pedal 
position sensor (main)

Ignition 
switch: 
"ON"

Accelerator pedal: Released

900 

− 1,100 mV

Accelerator pedal: Gradually 
depressed

Increases in 
response to the 
pedal depression 
stroke

Accelerator pedal: Fully 
depressed

4,000 mV or more

Brake light 
switch

74

Stoplight switch

Brake pedal: Depressed

ON

Brake pedal: Released

OFF

Cancel code

57

Cancel code

Ignition switch: "ON"

The cancel code, 
which set when the 
cruise control 
system was 
cancelled at the 
last time.

Cancel switch 75

Cruise 
control 
switch

CANCEL "CANCEL" switch: Pressed

ON

"CANCEL" switch: Released

OFF

Clutch switch 78

Clutch switch <M/T>

Clutch pedal: Depressed

ON

Clutch pedal: Released

OFF

Cruise control 81

Cruise control system 
operation

Cruise control system: active

ON

Cruise control system: Inactive

OFF

Main switch

86

Cruise 
control 
switch

ON/OFF

"ON/OFF" switch: Pressed

ON

"ON/OFF" switch: Pressed again

OFF

Neutral 
switch

87

Shift lever position 
<TC-SST>

Shift lever: "N", "P", "R" position

ON

Shift lever: Other than "N", "P", "R" 
position

OFF

AUTO-CRUISE CONTROL

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ENGINE AND EMISSION CONTROL

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ECM TERMINAL VOLTAGE REFERENCE CHART 
FOR CRUISE CONTROL SYSTEM OPERATION

M1172002700858

AC709324 AB

MB992110

ECM

1. Disconnect all ECM connectors, and connect special tool 

MB992110 (Power plant ECU check harness) in between.

2. Measure the voltages between the check connector 

terminals of special tool MB992110 and ground terminals 81 
or 93.

Normally 
closed brake 
switch

89

Stoplight switch (brake 
switch)

Brake pedal: Depressed

ON

Brake pedal: Released

OFF

Resume 
switch

91

Cruise 
control 
switch

ACC/RES "ACC/RES" switch: Pressed

ON

"ACC/RES" switch: Released

OFF

Set switch

92

Cruise 
control 
switch

COAST/S
ET

"COAST/SET" switch: Pressed

ON

"COAST/SET" switch: Released

OFF

TP sensor 
(main)

13

Throttle position sensor 
(main)*

• Remove the intake air 

hose at the throttle 
body.

• Disconnect the TP 

sensor connector, and 
then connect terminals 
3, 4, 5 and 6 with the 
use of the special tool: 
MB991658 (Test 
harness).

• Ignition switch: "ON"

Fully close 
the throttle 
valve with 
your finger

300 

− 700 mV

Fully open 
the throttle 
valve with 
your finger

4,000 mV or more

No load

500 

− 660 mV

A/C switch: "OFF" to "ON"

Voltage rises

Shift lever: "N" to "D" 

Voltage rises

Vehicle speed 4

Vehicle speed signal

Road test the vehicle

The speedometer 
and scan tool 
MB991958 display 
the same value.

Scan tool 
display

Item 
num
ber

Inspection item

Inspection requirement

Normal condition