Mitsubishi Lancer Evolution X. Manual - part 118

CRUISE CONTROL

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ENGINE AND EMISSION CONTROL

17-59

CAUTION

If there is any problem in the CAN bus lines, an incorrect 
diagnostic trouble code (DTC) may be set. Prior to this 
diagnosis, diagnose the CAN bus lines (Refer to GROUP 
54C, Trouble code diagnosis 

P.54C-9

.)

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

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

.)

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-15

.) 

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

.)

Q: Is DTC U0141 set?

YES : Repair the MFI system (Refer to GROUP 13A, 

Diagnosis, Diagnostic Trouble Code Procedures − 

DTC U0141: ETACS-ECU CAN Communication Time 
Out 

P.13A-694

.) Then go to Step 6.

NO :  Go to Step 3.

AC608435

Data link connector

MB991827

MB991824

MB991910

AB

CRUISE CONTROL

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ENGINE AND EMISSION CONTROL

17-60

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-643

.)

Q: Is DTC U0155 set?

YES : Repair the ETACS system (Refer to GROUP 54A, 

ETACS, Troubleshooting, Diagnostic Trouble Code 
Procedures − DTC U0155: Combination Meter-ECU 

CAN Communication Time Out 

P.54A-665

.) Then go 

to Step 6.

NO :  Go to Step 4.

STEP 4. Using scan tool MB991958, check the combination 
meter system actuator test item 7: Cruise indicator 1.
(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 check the actuator test for 

combination meter system item 7: indicator 1 (Refer to 
GROUP 54A, Combination Meter, Troubleshooting − 

Actuator Teat Table 

P.54A-96

.)

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-81

.) Then go to Step 6.

STEP 5. Check the symptoms.
Q: When the "ON/OFF" switch is turned ON, is the 

"CRUISE" indicator light illuminated?
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-888

.] 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.

STEP 6. Check the symptoms.
Q: When the "ON/OFF" switch is turned ON, is the 

"CRUISE" indicator light illuminated?
YES : The procedure is complete.
NO :  Return to Step 1.

CRUISE CONTROL

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ENGINE AND EMISSION CONTROL

17-61

DATA LIST REFERENCE TABLE

M1172002401850

CAUTION

Driving tests always need two people: one driver and one observer.

Scan tool 
display

Item 
number

Inspection item

Inspection requirement

Normal condition

Brake light 
switch

74

Stoplight switch 
(for stoplight 
circuit)

Ignition 
switch: "ON"

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" 
switch)

Ignition 
switch: "ON"

"CANCEL" switch: Pressed

ON

"CANCEL" switch: Released

OFF

Clutch 
switch

78

Clutch switch 
<M/T>

Ignition 
switch: "ON"

Clutch pedal: Depressed

ON

Clutch pedal: Released

OFF

Cruise 
switch

81

Cruise control 
system 
operation

Cruise control system: active

ON

Cruise control system: Inactive

OFF

Main 
switch

86

Cruise control 
switch 
("ON/OFF" 
switch)

Ignition 
switch: "ON"

"ON/OFF" switch: Pressed

ON

"ON/OFF" switch: Pressed 
again

OFF

Neutral 
switch

88

Shift lever 
position 
<TC-SST>

Ignition 
switch: "ON"

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

OFF

Normally 
closed 
brake 
switch

89

Stoplight switch 
(for Cruise 
control circuit)

Ignition 
switch: "ON"

Brake pedal: Depressed

ON

Brake pedal: Released

OFF

Resume 
switch

91

Cruise control 
switch 
("ACC/RES" 
switch)

Ignition 
switch: "ON"

"ACC/RES" switch: Pressed

ON

"ACC/RES" switch: Released

OFF

Set switch

92

Cruise control 
switch 
("COAST/SET" 
switch)

Ignition 
switch: "ON"

"COAST/SET" switch: Pressed ON
"COAST/SET" switch: Released OFF

Vehicle 
speed

04

Vehicle speed 
signal

Road test the vehicle

The speedometer 
and scan tool 
MB991958 display 
the same value.

CRUISE CONTROL

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ENGINE AND EMISSION CONTROL

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ECM TERMINAL VOLTAGE REFERENCE CHART 
FOR CRUISE CONTROL SYSTEM OPERATION

M1172002701583

Required Special Tool:

• MB992110: Power plant ECU check harness

Use special tool MB992110, check the ECM terminal voltage.
1. Remove the ECM [Refer to GROUP 13A, Engine Control 

Module (ECM) 

P.13A-888

.]

2. Connect special tool MB992110 between the ECM and the 

body-side harness connector.

3. Measure the voltages between the check connector 

terminals of special tool MB992044 and ground terminals 
(ECM connector B-10 terminal number 81 or 93.)

AC709324 AB

MB992110

ECM

AC601589 AJ

Special tool - Power plant ECU check harness (MB992110) connector: Component side

48-Pin connector
(ECM connector B-10)

64-Pin connector
(ECM connector B-09)

Terminal 
number

Check item

Check condition

Normal condition

85

Clutch switch <M/T>

Ignition 
switch: "ON"

Depress the clutch pedal.

1V or less

Release the clutch pedal.

Battery positive 
voltage

107

Cruise control switch 
power supply

Ignition 
switch: "ON"

All switches: Released

4.7 - 5.0 V 

"ON/OFF" switch: Pressed

0 - 0.5 V 

"CANCEL" switch: Pressed

1.0 - 1.8 V 

"COAST/SET" switch: Pressed

2.3 - 3.0 V 

"ACC/RES" switch: Pressed

3.5 - 4.2 V 

108

Stoplight switch 
(brake switch)

Ignition 
switch: "ON"

Depress the brake pedal.

Battery positive 
voltage

Release the brake pedal.

1V or less