Mitsubishi Evolution X. Manual - part 1027

HANDS-FREE CELLULAR PHONE SYSTEM

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CHASSIS ELECTRICAL

54A-469

STEP 3. Using scan tool MB991958, diagnose the CAN bus 
line.
Use scan tool MB991958 to diagnose the CAN bus lines.

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 "ON" position.
(3) Diagnose the CAN bus line.
Q: Is the check result normal?

YES : Go to Step 4.
NO :  Repair the CAN bus line (Refer to GROUP 54C, 

Diagnosis 

P.54C-14

).

STEP 4. Using scan tool MB991958 read the radio and CD 
player <vehicles without MMCS> or CAN box unit 
<vehicles with MMCS> diagnostic trouble code.
Check the diagnostic trouble code is set to the radio and CD 
player <vehicles without MMCS> or CAN box unit <vehicles 
with MMCS>.
Check whether a radio and CD player <vehicles without 
MMCS> or CAN box unit <vehicles with MMCS> 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 radio and CD player <vehicles without 

MMCS> or multivision display <vehicles with MMCS> 
(Refer to Radio and CD player 

− Diagnosis 

P.54A-288

 

<vehicles without MMCS> or MMCS 

− Diagnosis 

P.54A-384

 <vehicles with MMCS>).

NO :  Go to Step 5.

AC608435

Data link connector

MB991827

MB991824

MB991910

AB

HANDS-FREE CELLULAR PHONE SYSTEM

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CHASSIS ELECTRICAL

54A-470

STEP 5. Check the steering wheel voice control switch.
Refer to 

P.54A-518

.

Q: Is the check result normal?

YES : Go to Step 6.
NO :  Replace the steering wheel voice control switch.

STEP 6. Check the steering wheel audio remote control 
switch.
Refer to 

P.54A-535

.

Q: Is the check result normal?

YES : Go to Step 7.
NO :  Replace the steering wheel audio remote control 

switch.

STEP 7. Check steering wheel audio remote control switch 
connector C-213 and steering wheel voice control switch 
connector C-206 for loose, corroded or damaged 
terminals, or terminals pushed back in the connector.
Q: Are wheel audio remote control switch connector C-213 

and steering wheel voice control switch connector 
C-206 in good condition?
YES : Go to Step 8.
NO :  Repair the defective connector.

STEP 8. Check the wiring harness between steering wheel 
voice control switch connector C-206 (terminal 3) and 
steering wheel audio remote control switch connector 
C-213 (terminal 3).

• Check the communication lines for open circuit and short 

circuit.

Q: Is the wiring harness between steering wheel voice 

control switch connector C-206 (terminal 3) and 
steering wheel audio remote control switch connector 
C-213 (terminal 3) in good condition?
YES : Go to Step 9.
NO :  The wiring harness may be damaged or the 

connector(s) may have loose, corroded or damaged 
terminals, or terminals pushed back in the connector. 
Repair the wiring harness as necessary.

HANDS-FREE CELLULAR PHONE SYSTEM

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CHASSIS ELECTRICAL

54A-471

STEP 9. Check the wiring harness between steering wheel 
voice control switch connector C-206 (terminal 2) and 
clock spring connector C-202 (terminal 4).

• Check the communication lines for open circuit and short 

circuit.

Q: Is the wiring harness between steering wheel voice 

control switch connector C-206 (terminal 2) and clock 
spring connector C-202 (terminal 4) in good condition?
YES : Go to Step 10.
NO :  The wiring harness may be damaged or the 

connector(s) may have loose, corroded or damaged 
terminals, or terminals pushed back in the connector. 
Repair the wiring harness as necessary.

STEP 10. 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 : Go to Step 11.
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

).

STEP 11. Temporarily replace the hands free module, and 
check whether the diagnostic trouble code is reset.
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 radio and CD player <vehicles without 

MMCS> or multivision display <vehicles with MMCS>.

NO :  Replace the hands free module.

HANDS-FREE CELLULAR PHONE SYSTEM

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CHASSIS ELECTRICAL

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DTC B2475: VIN not programmed

CAUTION

• If diagnostic trouble code B2475 is set, be 

sure to diagnose the CAN bus line.

• When replacing the ECU, always check that 

the communication circuit is normal.

.

TROUBLE JUDGMENT

With the ignition switch at the "ON" position, if the 
VIN is not written to the hands free module, diagnos-
tic trouble code B2475 is stored.

.

TROUBLESHOOTING HINTS

• The CAN bus line may be defective

• The hands free module may be defective

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

YES : Diagnose the ETACS-ECU (Refer to 

P.54A-582

).

NO :  Go to Step 3.

AC608435

Data link connector

MB991827

MB991824

MB991910

AB