How to Read and Erase Diagnostic Trouble Codes

DIAGNOSTIC TROUBLE CODE DIAGNOSIS

ON-BOARD DIAGNOSTICS

The CAN is a communication method which the ECUs use in order to communicate each other.
The CAN-related diagnostic trouble codes will be stored in the following ECUs, which use the CAN communication.

- ETACS-ECU

- ECM

- TCM [CVT]

- Transaxle assembly (TC-SST-ECU) [RALLIART]

- Steering wheel sensor [vehicles with ASC]

- ABS-ECU [vehicles without ASC]

- ASC-ECU [vehicles with ASC]

- AWD-ECU [Electric controlled AWD]

- AWC-ECU [RALLIART]

- Electric power steering-ECU [vehicles with electric power steering]

- Shift lever [RALLIART]

- A/C-ECU [vehicles with A/C]

- Heater control unit [vehicles without A/C]

- SRS-ECU

- Occupant classification-ECU

- Radio and CD player

- CAN box unit [vehicles with Mitsubishi Multi-Communication System (MMCS)]

- Satellite radio tuner [vehicles with satellite radio]

- WCM [vehicles without KOS]

- KOS-ECU [vehicles with KOS]

- Combination meter

HOW TO CONNECT THE SCAN TOOL (M.U.T.-III)

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





CAUTION:
To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK"
(OFF) position before connecting or disconnecting scan tool MB991958.

1. Ensure that the ignition switch is at the "LOCK" (OFF) position.
2. Start up the personal computer.
3. Connect special tool MB991827 to special tool MB991824 and the personal computer.
4. Connect special tool MB991910 to special tool MB991824.
5. Connect special tool MB991910 to the data link connector.
6. Turn the power switch of special tool MB991824 to the "ON" position.
NOTE:
When special tool MB991824 is energized, special tool MB991824 indicator light will be illuminated in a green color.

7. Start the scan tool system on the personal computer.
NOTE:
Disconnecting scan tool MB991958 is the reverse of the connecting sequence, making sure that the ignition switch is at the "LOCK" (OFF) position.

HOW TO DIAGNOSE THE CAN BUS LINE

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





CAUTION:
To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK"
(OFF) position before connecting or disconnecting scan tool MB991958.

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 whose CAN bus lines will be 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 whose CAN bus lines will be 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.