Mitsubishi Evolution X. Manual — part 1029

HANDS-FREE CELLULAR PHONE SYSTEM

TSB Revision

CHASSIS ELECTRICAL

54A-477

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-459

."

(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 SRS-ECU
diagnostic trouble code
Check again if the DTC is set to the SRS-ECU.
Q: Is the DTC set?

YES : Troubleshoot the SRS (Refer to GROUP 52B,

Troubleshooting

P.52B-31

).

NO : Go to Step 3.

STEP 3. Recheck for diagnostic trouble code.
Check again if the DTC is set to the hands free module.
(1) Erase the DTC.
(2) Turn the ignition switch from "LOCK" (OFF) position to "ON"

position.

(3) Check if DTC is set.
Q: Is the DTC set?

YES : Replace the hands free module.
NO : The trouble can be an intermittent malfunction (Refer

to GROUP 00

− How to use

Troubleshooting/inspection Service Points

− How to

Cope with Intermittent Malfunction

P.00-15

).

AC608435

Data link connector

MB991827

MB991824

MB991910

AB

HANDS-FREE CELLULAR PHONE SYSTEM

TSB Revision

CHASSIS ELECTRICAL

54A-478

DTC U0154: OCM CAN timeout

CAUTION

If DTC U0154 is set, be sure to diagnose the CAN
bus line.

CAUTION

When replacing the ECU, always check that the
communication circuit is normal.

.

DIAGNOSTIC FUNCTION

When the signals from occupant classification-ECU
cannot be received, the hands free module sets DTC
U0154.

.

TROUBLESHOOTING HINTS

• The CAN bus line may be defective.

• The hands free module may be defective.

• The occupant classification-ECU may be defec-

tive.

DIAGNOSIS

Required Special Tools:

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

• MB991824: Vehicles 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-459

."

(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

HANDS-FREE CELLULAR PHONE SYSTEM

TSB Revision

CHASSIS ELECTRICAL

54A-479

STEP 2. Using scan tool MB991958, read the occupant
classification-ECU diagnostic trouble code.
Check if DTC is set to the occupant classification-ECU.
Q: Is the DTC set?

YES : Troubleshoot the SRS (Refer to GROUP 52B,

Diagnosis

P.52B-297

).

NO : Go to Step 3.

STEP 3. Recheck for diagnostic trouble code.
Check again if the DTC is set to the hands free module.
(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 hands free module.
NO : The trouble can be an intermittent malfunction (Refer

to GROUP 00, How to use
Troubleshooting/inspection Service Points

− How to

Cope with Intermittent Malfunction

P.00-15

).

DTC U0155: Meter CAN timeout

CAUTION

If DTC U0155 is set in the hands free module,
diagnose the CAN main bus line.

CAUTION

Whenever the ECU is replaced, ensure that the
communication circuit is normal.

.

DIAGNOSTIC FUNCTION

If the signal from combination meter cannot be
received, the hands free module sets the DTC
U0155.

.

PROBABLE CAUSES

• The CAN bus line may be defective.

• The hands free module may be defective.

• The combination meter may be defective.

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

HANDS-FREE CELLULAR PHONE SYSTEM

TSB Revision

CHASSIS ELECTRICAL

54A-480

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-459

."

(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 combination
meter diagnostic trouble code.
Check whether a combination meter DTCs are set or not.
(1) Turn the ignition switch to the "ON" position.
(2) Check for combination meter DTCs.
(3) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the DTC set?

YES : Diagnose the combination meter (Refer to

combination meter, Diagnosis

P.54A-28

).

NO : Go to Step 3.

STEP 3. Recheck for diagnostic trouble code.
Check again if the DTC is set to the hands free module.
(1) Erase the DTC.
(2) Turn the ignition switch from "LOCK" (OFF) position to "ON"

position.

(3) Check if DTC is set.
Q: Is the DTC set?

YES : Replace the hands free module.
NO : The trouble can be an intermittent malfunction (Refer

to GROUP 00

− How to use

Troubleshooting/inspection Service Points

− How to

Cope with Intermittent Malfunction

P.00-15

).

AC608435

Data link connector

MB991827

MB991824

MB991910

AB