Mitsubishi Evolution X. Manual - part 214

AUTO-CRUISE CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-25

STEP 20. Read the DTC.
(1) Disconnect the negative (

−) battery terminal, to erase the 

DTC of the cruise control system.

(2) Connect the negative (

−) battery cable.

(3) Turn the ignition switch to the "ON" position, and press the 

"ON/OFF" switch to turn the cruise control system to ON 
(turn on the "CRUISE" indicator light).

(4) After turning the cruise control system to ON, when 2 

minutes or more has elapsed without operating the cruise 
control switches, read the diagnostic trouble code of the 
cruise control system (Refer to 

P.17-10

).

Q: Is DTC 15 set?

YES : 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 21.

NO :  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

).

STEP 21. Using scan tool MB991958, check data list item 
75: Cancel switch, item 86: Main switch, item 91: Resume 
switch and item 92: Set switch.
(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 cruise 

control system (Refer to 

P.17-10

).

• Item 75: Cancel switch.

• When "CANCEL" switch is pressed, the display on 

scan tool MB991958 should be "ON".

• When "CANCEL" switch is released, the display on 

scan tool MB991958 should be "OFF".

• Item 86: Main switch.

• When "ON/OFF" switch is pressed, the display on 

scan tool MB991958 should be "ON".

• When "ON/OFF" switch is pressed again, the display 

on scan tool MB991958 should be "OFF".

• Item 91: Resume switch.

• When "ACC/RES" switch is pressed, the display on 

scan tool MB991958 should be "ON".

• When "ACC/RES" switch is released, the display on 

scan tool MB991958 should be "OFF".

• Item 92: Set switch.

• When "COAST/SET" switch is pressed, the display 

on scan tool MB991958 should be "ON".

• When "COAST/SET" switch is released, the display 

on scan tool MB991958 should be "OFF".

(4) Turn the ignition switch to the "LOCK" (OFF) position.
(5) Disconnect scan tool MB991958.

AUTO-CRUISE CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-26

Q: Is the switch operating properly?

YES : Go to Step 22.
NO :  Return to Step 2.

STEP 22. Read the DTC.
(1) Disconnect the negative (

−) battery terminal, to erase the 

DTC of the cruise control system.

(2) Connect the negative (

−) battery cable.

(3) Turn the ignition switch to the "ON" position, and press the 

"ON/OFF" switch to turn the cruise control system to ON 
(turn on the "CRUISE" indicator light).

(4) After turning the cruise control system to ON, when 2 

minutes or more has elapsed without operating the cruise 
control switches, read the diagnostic trouble code of the 
cruise control system (Refer to 

P.17-10

).

Q: Is DTC 15 set?

YES : Return to Step 1.
NO :  The procedure is complete.

AUTO-CRUISE CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-27

DTC 22: Stoplight Switch System

AC709271

HEATED 
SEAT

34

FUSIBLE 
LINK

ETACS-
ECU

STOPLIGHT 
SWITCH

STOPLIGHT

ENGINE
CONTROL
MODULE
(ECM)

WHITE

WHITE

BLACK-WHITE

RED

RED

BLACK

BLACK

BLACK

YELLOW-GRAY

YELLOW-GRAY

AB

Stoplight Switch System Circuit

AC709271

HEATED 
SEAT

34

FUSIBLE 
LINK

ETACS-
ECU

STOPLIGHT 
SWITCH

STOPLIGHT

ENGINE
CONTROL
MODULE
(ECM)

WHITE

WHITE

BLACK-WHITE

RED

RED

BLACK

BLACK

BLACK

YELLOW-GRAY

YELLOW-GRAY

AC709196 AB

B-10 (GR)

Connector: B-10

ECM

Air cleaner

AC709197

Connector: C-48

AC

AC708835AC

ETACS-ECU

Connectors: C-304, C-309, C-312

C-309 (B)

C-304

C-312

AUTO-CRUISE CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-28

.

CIRCUIT OPERATION

• As for the stoplight switch, when the brake pedal 

is depressed, the stoplight switch ON signal is 
transmitted from the ETACS-ECU to the ECM via 
CAN bus line.

• As for the brake switch, when the brake pedal is 

depressed, battery positive voltage is supplied to 
the stoplight switch (terminal number 3), and 
when the brake pedal is not depressed, the volt-
age of ECM (terminal number 108) will indicate 0 
volt. 

.

DTC SET CONDITIONS

Check Condition

• The "CRUISE" indicator light illuminates.

JUDGMENT CRITERIA

• Open/short in stoplight switch circuit.

• Open circuit in the brake switch circuit (between 

ECM terminal number 108 and ground).

• Malfunction of CAN bus line.

.

TROUBLESHOOTING HINTS (THE MOST 
LIKELY CAUSES FOR THIS CASE:)

• Malfunction of CAN bus system.

• Damaged harness or connector.

• Malfunction of the stoplight switch.

• Malfunction of the ETACS-ECU

• Malfunction of the ECM

DIAGNOSIS

Required Special Tools:

• MB991958: Scan Tool (M.U.T.-III Sub Assembly)

• MB991824: V.C.I.

• MB991827: M.U.T.-III USB Cable

• MB991910: M.U.T.-III Main Harness A

• MB991223: Harness Set

• MB992006: Extra Fine Probe