Mitsubishi Evolution X. Manual — part 711

SRS AIR BAG DIAGNOSIS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-291

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

YES : Diagnose the radio and CD player.
NO : Go to Step 3.

STEP 3. Recheck for diagnostic trouble code.
Check again if the DTC is set to the SRS-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 SRS-ECU.
NO : There is an intermittent malfunction such as poor

engaged connector(s) or open circuit (Refer to
GROUP 00, How to use Troubleshooting/inspection
Service Points

P.00-15

).

DTC U0195: Satellite Radio Tuner CAN Timeout

CAUTION

• If the DTC U0195 is set, be sure to diagnose

the CAN main bus line.

• When replacing the ECU, always check that

the communication circuit is normal.

.

TROUBLE JUDGMENT

If the signal from satellite radio tuner cannot be
received, the SRS-ECU sets the DTC U0195.

.

JUDGMENT CRITERIA

Because of the CAN-B bus circuit malfunction, if
SRS-ECU becomes unable to perform the normal
data transmission, SRS-ECU determines that an
abnormality is present.

.

TROUBLESHOOTING HINTS

• The CAN bus may be defective.

• The satellite radio tuner may be defective.

• The SRS-ECU may be defective.

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)

SRS AIR BAG DIAGNOSIS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-292

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

P.52B-28

."

(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 satellite radio
tuner diagnostic trouble code.
Check if DTC is set to the satellite radio tuner.
Q: Is the DTC set?

YES : Diagnose the satellite radio.
NO : Go to Step 3.

STEP 3. Recheck for diagnostic trouble code.
Check again if the DTC is set to the SRS-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 SRS-ECU (Refer to

P.52B-383

).

NO : The trouble can be an intermittent malfunction such

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

P.00-15

)

AC608435

Data link connector

MB991827

MB991824

MB991910

AB

SRS AIR BAG DIAGNOSIS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-293

DTC U0197: Hands Free Module CAN Timeout

CAUTION

• If the DTC U0197 is set, be sure to diagnose

the CAN main bus line.

• When replacing the ECU, always check that

the communication circuit is normal.

.

DIAGNOSTIC FUNCTION

When the signals from hands free module cannot be
received, the SRS-ECU sets the DTC U0197.

.

JUDGMENT CRITERIA

Because of the CAN-B bus circuit malfunction, if
SRS-ECU becomes unable to perform the normal
data transmission, SRS-ECU determines that an
abnormality is present.

.

TROUBLESHOOTING HINTS

• The CAN bus line may be defective.

• The hands free module may be defective.

• The SRS-ECU may be defective.

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

P.52B-28

."

(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

SRS AIR BAG DIAGNOSIS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-294

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

YES : Diagnose the hands-free cellular phone system.
NO : Go to Step 3.

STEP 3. Recheck for diagnostic trouble code.
Check again if the DTC is set to the SRS-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 SRS-ECU (Refer to

P.52B-383

).

NO : There is an intermittent malfunction such as poor

engaged connector(s) or open circuit (Refer to
GROUP 00, How to use Troubleshooting/inspection
Service Points

P.00-15

).

DTC U1414: Defective Coding Data

CAUTION

• If the DTC U1414 is set, diagnose the CAN

main bus lines.

• When replacing the ECU, always check that

the communication circuit is normal.

.

DIAGNOSTIC FUNCTION

If the vehicle information data is not registered to the
SRS-ECU, the SRS-ECU sets the DTC U1414.

.

JUDGMENT CRITERIA

When the coding data (vehicle information) from
ETACS-ECU is not received, SRS-ECU determines
that the abnormality is present.

.

TROUBLESHOOTING HINTS

• The CAN bus line may be defective

• The ETACS-ECU may be defective

• The SRS-ECU may be defective

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)