Mitsubishi Evolution X. Manual - part 1055

ETACS

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CHASSIS ELECTRICAL

54A-581

HOW TO DIAGNOSE THE CAN BUS LINES

Required Special Tools:

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

• MB991824: Vehicle Communication Interface (V.C.I.)

• MB991827: M.U.T.-III USB Cable

• MB991910: M.U.T.-III Main Harness A (Vehicles with 

CAN communication system)

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

matches the vehicle being 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 being diagnosed.

• If they match, go to Step 8.

• If not, go to Step 5.

8. Select 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.

CHECK OF FREEZE FRAME DATA

The freeze frame data can be checked by using the 
scan tool (GROUP 00, How to Cope with Intermittent 
Malfunction 

P.00-15

).

.

When detecting fault and storing the DTC, the ECU 
connected to CAN bus line obtains the data before 
the determination of the DTC and the data when the 
DTC is determined, and then stores the ECU status 
of that time. By analyzing the data from scan tool, the 
troubleshooting can be performed more efficiently. 
The displayed items are as shown in the table below.

DISPLAY ITEM LIST

NOTE: 

.

•

*1

: If a failure occurs to both the ASC-ECU and 

ETACS-ECU, 0000 km or FFFF km is displayed 
to the scan tool MB991958.

•

*2

: Total elapsed time can be stored up to 65,534 

minutes (45.5 days). The display of scan tool is 
fixed to 65,534 minutes after 65,534 minutes 
have elapsed. Or, if the battery is disconnected, 
the total elapsed time cannot be measured prop-

Item No.

Item name

Data item

Unit

01

Odometer

Total driving distance after the diagnostic trouble 
code is generated

km

*1

02

Ignition cycle

Number of times the ignition switch is turned "ON" or 
"LOCK (OFF)" after the past failure transition

Number of 
counts is 
displayed.

03

Elapsed time after 
failure

Total elapsed time after a diagnostic trouble code is 
generated

min

*2

04

Current trouble 
accumulative time

Cumulative time for current malfunction of 
diagnostic trouble code

min

ETACS

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CHASSIS ELECTRICAL

54A-582

erly. Thus, 65,535 minutes (null value) is dis-
played. Because it is calculated based on the 
ETACS-ECU information, the correct display may 
not be shown if the ETACS-ECU has had a time-
out.

DIAGNOSTIC TROUBLE CODE CHART

M1545001100459

Diagnostic trouble 
code number

Trouble content

Reference page

U0001

Bus off (CAN-C)

P.54A-584

U0019

Bus off (CAN-B)

U0100

Engine control module CAN timeout

P.54A-585

U0101

TC-SST-ECU CAN timeout

P.54A-587

U0103

Shift lever CAN timeout

P.54A-589

U0121

ASC-ECU CAN timeout

P.54A-591

U0126

Steering wheel sensor CAN timeout

P.54A-593

U0136

S-AWC-ECU CAN timeout

P.54A-595

U0151

SRS-ECU CAN timeout

P.54A-597

U0154

Occupant classification-ECU CAN timeout

P.54A-599

U0155

Combination meter CAN timeout

P.54A-601

U0164

A/C-ECU CAN timeout

P.54A-603

U0168

WCM or KOS-ECU CAN timeout

P.54A-605

U0184

Audio CAN timeout

P.54A-607

U0195

Satellite radio tuner CAN timeout

P.54A-609

U0197

Hands free module CAN timeout

P.54A-611

U0245

CAN box unit CAN timeout

P.54A-613

U1108

Excess CAN-B ECU detection

P.54A-615

U1120

Bus line (CAN-C) low input

P.54A-617

U1121

Bus line (CAN-C) high input

U0169

Sunroof LIN timeout <Vehicles with sunroof>

Refer to GROUP 54B, 
Diagnosis 

P.54B-5

.

U0215

P/W SW (DR) LIN timeout

U0231

Rain light sensor LIN timeout <Vehicles with auto light 
function>

U1109

Column SW LIN timeout

U150B

Column SW checksum error

U150C

P/W SW (DR) checksum error

U1511

Sunroof checksum error <Vehicles with sunroof>

U1512

Rain light sensor checksum error <Vehicles with auto 
light function>

U1514

Bit error (LIN)

U1515

No-Bus activity error (LIN)

U0331

*

ECU internal error

P.54A-618

ETACS

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CHASSIS ELECTRICAL

54A-583

NOTE: 

*

: If diagnostic trouble codes No. U0331, 

B1761, B222C, B2206, or B2215 is set, there may be 
an error with the coding data stored in the 
ETACS-ECU.

B1034

Ambient air temperature sensor system (short circuit) Refer to GROUP 55, 

Auto A/C Diagnosis 

P.55-9

.

B1035

Ambient air temperature sensor system (open circuit)

B16A0

Taillight (RH) open circuit

P.54A-196

B16A1

Taillight (LH) open circuit

B16A2

Blown turn-signal light (LH) bulb

P.54A-107

B16A3

Turn-signal light (LH) short circuit

B16A4

Blown turn-signal light (RH) bulb

B16A5

Turn-signal light (RH) short circuit

B16A6

Turn-signal fuse blown

P.54A-265

B16A7

Taillight (RH) short circuit

P.54A-196

B16A8

Taillight (LH) short circuit

B1761

*

VIN not recorded

P.54A-619

B210A

+B power supply (low input)

P.54A-621

B210B

+B power supply (high input)

B222C

*

Coding incomplete

P.54A-625

B2206

*

Chassis number does not match

P.54A-625

B2215

*

ECU internal error

P.54A-627

B2350

Lighting switch

P.54A-276

B2351

Wiper switch

B2353

Ignition power supply (low input)

P.54A-627

B2354

Ignition power supply (high input)

Diagnostic trouble 
code number

Trouble content

Reference page

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CHASSIS ELECTRICAL

54A-584

DIAGNOSIS TROUBLE CODE PROCEDURES

DTC U0001: Bus off (CAN-C)

 

DTC U0019: Bus off (CAN-B)

CAUTION

• If DTC U0001 or U0019 is set to the 

ETACS-ECU, always diagnose the CAN bus 
line.

• Before replacing the ECU, ensure that the 

communication circuit is normal.

.

TROUBLE JUDGEMENT

When the ETACS-ECU is returned from the bus off 
state, or when the bus off error is indicated to the 
ETACS-ECU state, the DTC U0001 (CAN-C) or 
U0019 (CAN-B) is stored.

.

TECHNICAL DESCRIPTION (COMMENT)

The ETACS-ECU may have a malfunction, or the 
ETACS-ECU power supply or earth circuit may have 
a problem.

.

TROUBLESHOOTING HINTS

• The ETACS-ECU may be defective.

• The wiring harness or connectors may have 

loose, corroded, or damaged terminals, or termi-
nals pushed back in the connector

DIAGNOSIS

Required Special Tools:

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

• MB991824: Vehicle Communication Interface (V.C.I.)

• MB991827: M.U.T.-III USB Cable

• MB991910: M.U.T.-III Main Harness A (Vehicles with 

CAN communication system)

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. Refer to "How to connect the 

Scan Tool (M.U.T.-III) 

P.54A-579

."

(2) Turn the ignition switch to the "ON" position.
(3) Diagnose the CAN bus line.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the CAN bus line found to be normal?

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

Diagnosis 

P.54C-14

).

AC608435

Data link connector

MB991827

MB991824

MB991910

AB