Mitsubishi Evolution X. Manual — part 211

AUTO-CRUISE CONTROL

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ENGINE AND EMISSION CONTROL

17-13

HOW TO DIAGNOSE THE CAN BUS LINE

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

1. Connect scan tool MB991958 to the data link connector.
2. Turn the ignition switch to the "ON" position.
3. Select the "CAN Bus Diagnosis" from the start-up screen.
4. When the vehicle information is displayed, confirm that it

matches the vehicle whose CAN bus lines will be
diagnosed.

• If they match, go to step 8.

• If not, go to step 5.

5. Select the "view vehicle information" button.
6. Enter the vehicle information and select the "OK" button.
7. When the vehicle information is displayed, confirm again

that it matches the vehicle which whose CAN bus lines will
be diagnosed.

• If they match, go to step 8.

• If not, go to step 5.

8. Press the "OK" button.
9. When the optional equipment screen is displayed, choose

the one which the vehicle is fitted with, and then select the
"OK" button.

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

DIAGNOSTIC TROUBLE CODE CHART

M1172002200897

Check according to the inspection chart that is
appropriate for the DTC.

DTC number

Inspection Item

Reference page

15

Cruise control switch system

P.17-14

22

Stoplight switch system

P.17-27

23

ECM and its related components

P.17-36

AUTO-CRUISE CONTROL

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ENGINE AND EMISSION CONTROL

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DIAGNOSTIC TROUBLE CODE PROCEDURES

DTC 15: Cruise Control Switch System

AC709181

ON/OFF

CANCEL

COAST/SET

ACC/RES

CLOCK
SPRING

ENGINE
CONTROL
MODULE
(ECM)

CRUISE
CONTROL
SWITCH

GREEN

GREEN-RED

YELLOW-GREEN

RED-YELLOW

RED-YELLOW

BLUE

AB

Cruise Control Switch System Circuit

AC709196 AB

B-10 (GR)

Connector: B-10

ECM

Air cleaner

AC709197

Connector: C-130

AB

C-130
(BR)

AC709198AB

C-201 (L)

C-202

C-205

Connectors: C-201, C-202, C-205

Clock spring

AUTO-CRUISE CONTROL

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ENGINE AND EMISSION CONTROL

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.

CIRCUIT OPERATION

This circuit judges the signals of each switch
("ON/OFF", "CANCEL", "COAST/SET" and
"ACC/RES") of the cruise control switch. The ECM
detects the state of the cruise control switch by sens-
ing the voltages shown below.

• When all switches are released: 4.7 − 5.0 volts

• When the "ON/OFF" switch is pressed: 0 − 0.5

volt

• When the "CANCEL" switch is pressed: 1.0 − 1.8

volts

• When the "COAST/SET" switch is pressed: 2.3 −

3.0 volts

• When the "ACC/RES" switch is pressed: 3.5 −

4.2 volts

.

DTC SET CONDITIONS

Check Condition

• The "CRUISE" indicator light illuminates.

JUDGMENT CRITERIA

• This DTC is set when the "COAST/SET" switch

or "ACC/RES" switch is stuck to ON.

.

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

• Damaged harness or connector.

• Malfunction of the cruise control switch.

• Malfunction of the clock spring.

• 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

• MB992110: Power Plant ECU Check Harness

AUTO-CRUISE CONTROL

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ENGINE AND EMISSION CONTROL

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STEP 1. Using scan tool MB991958, check the data list
item 75: Cancel switch, item 86: Main switch, item 91:
Resume switch and item 92: Set switch.

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) 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.
Q: Is the switch operating properly?

YES : Go to Step 20.
NO : Go to Step 2.