Mitsubishi Evolution X. Manual - part 1056

ETACS

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CHASSIS ELECTRICAL

54A-585

STEP 2. Recheck for diagnostic trouble code.
Check again if the DTC is set to the ETACS-ECU.
(1) Erase the DTC.
(2) Turn the ignition switch from "LOCK" (OFF) position to "ON" 

position.

(3) Check if DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the DTC set?

YES : Replace the ETACS-ECU.
NO :  The trouble can be an intermittent malfunction (Refer 

to GROUP 00, How to Cope with Intermittent 
Malfunction 

P.00-15

).

DTC U0100: Engine control module CAN timeout

CAUTION

• If DTC U0100 is set to the ETACS-ECU, always 

diagnose the CAN bus line.

• Before replacing the ECU, ensure that the 

communication circuit is normal.

.

TROUBLE JUDGMENT

If the signal from engine control module cannot be 
received, the ETACS-ECU sets DTC U0100.

.

JUDGMENT CRITERIA

After the following statuses continue to be true for 5 
seconds, if the communication with the engine con-
trol module cannot be established for 0.6 second or 
more, the ETACS-ECU determines that a problem 
has occurred.

• No abnormality is present to the network.

• Ignition switch is in the ON position.

• No abnormality is present to the power supply 

fuse, or the odometer value is at 80.5 km (50.0 
miles) or more.

• ETACS-ECU system voltage is at 10−16 volts.

.

TROUBLESHOOTING HINTS

• The Engine control module may be defective.

• The ETACS-ECU may be defective.

• The CAN bus may be defective.

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)

ETACS

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CHASSIS ELECTRICAL

54A-586

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

).

STEP 2. Using scan tool MB991958, read the engine 
control module diagnostic trouble code.
Check if DTC is set to the engine control module.
Q: Is the DTC set?

YES : Troubleshoot the engine (Refer to GROUP 13A, 

Diagnostic Trouble Code Chart 

P.13A-44

).

NO :  Go to Step 3.

STEP 3. Using scan tool MB991958, read the combination 
meter diagnostic trouble code.
Check if DTC U0100 is set to the combination meter.
Q: Is the DTC set?

YES : Go to Step 4.
NO :  Go to Step 5.

AC608435

Data link connector

MB991827

MB991824

MB991910

AB

ETACS

TSB Revision

CHASSIS ELECTRICAL

54A-587

STEP 4. Recheck for diagnostic trouble code.
Check again if the DTC is set to the ETACS-ECU.
(1) Erase the DTC.
(2) Turn the ignition switch from "LOCK" (OFF) position to "ON" 

position.

(3) Check if DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the DTC set?

YES : Replace the engine control module.
NO :  The trouble can be an intermittent malfunction such 

as a poor connection or open circuit in the CAN bus 
lines between the engine control module and the 
ETACS-ECU (Refer to GROUP 00, How to Cope with 
Intermittent Malfunction 

P.00-15

).

STEP 5. Recheck for diagnostic trouble code.
Check again if the DTC is set to the ETACS-ECU.
(1) Erase the DTC.
(2) Turn the ignition switch from "LOCK" (OFF) position to "ON" 

position.

(3) Check if DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the DTC set?

YES : Replace the ETACS-ECU.
NO :  The trouble can be an intermittent malfunction such 

as a poor connection or open circuit in the CAN bus 
lines between the engine control module and the 
ETACS-ECU (Refer to GROUP 00, How to Cope with 
Intermittent Malfunction 

P.00-15

).

DTC U0101: TC-SST-ECU CAN timeout

CAUTION

• If DTC U0101 is set to the ETACS-ECU, always 

diagnose the CAN bus line.

• Before replacing the ECU, ensure that the 

communication circuit is normal.

.

TROUBLE JUDGMENT

If the signal from TC-SST-ECU cannot be received, 
the ETACS-ECU sets the DTC U0101.

.

JUDGMENT CRITERIA

After the following statuses continue to be true for 5 
seconds, if the communication with the TC-SST-ECU 
cannot be established for 0.6 second or more, the 
ETACS-ECU determines that a problem has 
occurred.

• No abnormality is present to the network.

• Ignition switch is in the ON position.

• No abnormality is present to the power supply 

fuse, or the odometer value is at 80.5 km (50.0 
miles) or more.

• ETACS-ECU system voltage is at 10−16 volts.

.

TROUBLESHOOTING HINTS

• The TC-SST-ECU may be defective.

• The ETACS-ECU may be defective.

• The CAN bus may be defective.

ETACS

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CHASSIS ELECTRICAL

54A-588

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

).

STEP 2. Using scan tool MB991958, read the TC-SST 
diagnostic trouble code.
Check if DTC is set to the TC-SST-ECU  (Refer to GROUP 
22C, Diagnosis 

P.22C-10

).

Q: Is the DTC set?

YES : Troubleshoot the TC-SS.
NO :  Go to Step 3.

STEP 3. Using scan tool MB991958, read the engine 
control module diagnostic trouble code.
Check if the DTC U0101 is set to the engine control module.
Q: Is the DTC set?

YES : Go to Step 4.
NO :  Go to Step 5.

AC608435

Data link connector

MB991827

MB991824

MB991910

AB