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DIAGNOSTIC FUNCTION
 
 
WARNING DISPLAY
When a malfunction occurs in the ACC system, the figure will be displayed on the information screen of multi information display.
If the indicator continues to be displayed on the information screen of multi information display, check the diagnostic trouble code that is set.
 
 
 
HOW TO CONNECT THE SCAN TOOL (M.U.T.-IIISE)
Required Special Tools:
  • MB992744: Vehicle communication interface-Lite (V.C.I.-Lite)
  • MB992745: V.C.I.-Lite main harness A
  • MB992747: V.C.I.-Lite USB cable short
  • MB992748: V.C.I.-Lite USB cable long
  • 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)
cautionTo prevent damage to scan tool (M.U.T.-IIISE), always turn off the power supply mode of the electric motor switch before connecting or disconnecting scan tool (M.U.T.-IIISE).
1. Ensure that turn off the power supply mode of the electric motor switch.
2. Start up the personal computer.
3. Connect special tool MB992747/M992748 or special tool MB991827 to special tool MB992744 or special tool MB991824 and the personal computer.
4. Connect special tool MB992745 or special tool MB991910 to special tool MB992744 or special tool MB991824.
5. Connect special tool MB992745 or special tool MB991910 to the data link connector.
note
  • When the special tool MB992745 is connected to the data link connector, the special tool MB992744 indicator light will be illuminated in a green color.
  • If the special tool MB992744 indicator lamp does not light in green, check the special tool MB992747/MB992748 or MB992745 of the connection.
6. Turn the power switch of special tool MB991824 to the "ON" position. <When using the special tool MB991824>
noteWhen special tool MB991824 is energized, special tool MB991824 indicator light will be illuminated in a green color.
7. Start the M.U.T.-IIISE system on the personal computer.
noteDisconnecting scan tool (M.U.T.-IIISE) is the reverse of the connecting sequence, making sure that the electric motor switch is at the OFF position.
 
 
 
HOW TO READ AND ERASE DIAGNOSTIC TROUBLE CODES
Required Special Tools:
  • MB992744: Vehicle communication interface-Lite (V.C.I.-Lite)
  • MB992745: V.C.I.-Lite main harness A
  • MB992747: V.C.I.-Lite USB cable short
  • MB992748: V.C.I.-Lite USB cable long
  • 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)
noteIf the 12V starter battery voltage is low, diagnostic trouble codes will not be set. Check the 12V starter battery if scan tool (M.U.T.-IIISE) does not display.
1. Connect scan tool (M.U.T.-IIISE) to the data link connector.
2. Turn on the power supply mode of the electric motor switch.
3. Select "STV."
4. Select "ACC/FCM."
5. Select "Diagnostic Trouble Code" to read the DTC.
6. If a DTC is set, it is shown.
7. Choose "Erase DTCs" to erase the DTC.
 
 
 
HOW TO READ DATA LIST
Required Special Tools:
  • MB992744: Vehicle communication interface-Lite (V.C.I.-Lite)
  • MB992745: V.C.I.-Lite main harness A
  • MB992747: V.C.I.-Lite USB cable short
  • MB992748: V.C.I.-Lite USB cable long
  • 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)
1. Connect scan tool (M.U.T.-IIISE) to the data link connector.
2. Turn on the power supply mode of the electric motor switch.
3. Select "STV."
4. Select "ACC/FCM."
5. Select the "Data List."
6. Choose an appropriate item.
 
 
 
HOW TO DIAGNOSE THE CAN BUS LINES
Required Special Tools:
  • MB992744: Vehicle communication interface-Lite (V.C.I.-Lite)
  • MB992745: V.C.I.-Lite main harness A
  • MB992747: V.C.I.-Lite USB cable short
  • MB992748: V.C.I.-Lite USB cable long
  • 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)
1. Connect scan tool (M.U.T.-IIISE) to the data link connector.
2. Turn on the power supply mode of the electric motor switch.
3. Select "CAN bus diagnosis" from the System select screen.
4. When the optional equipment screen is displayed, choose the one which the vehicle is fitted with, and then select the "OK" button.
 

 
 
CHECK OF THE FREEZE FRAME DATA
Various data of when the diagnostic trouble code has been set is obtained, and the status of that time is stored. By analyzing each data using scan tool (M.U.T.-IIISE), troubleshooting can be carried out efficiently.
Display items of the freeze frame data are as follows.
DISPLAY ITEM LIST
Item No.ItemUnit/display contents
1Odometerkm (mile)
2Odometer (Last time)km (mile)
3Frequency counterCount
4Operation counterCount
5System counterCount

 
 
FAIL-SAFE FUNCTIONS <ACC-ECU>
 
 
If the ACC-ECU determines that the ACC is defective by means of its self-diagnosis, the ACC failure display or the ACC temporary failure display will illuminate.
 
 
 
Illumination condition of display in case of failure
DTC No.ItemACC failure displayACC temporary failure display
C1394Incompleted learn neutral (Steering wheel sensor)ONOFF
C1707Implausible coding dataONOFF
C1750Voltage out of rangeOFFON
C1751ECU failureONOFF
C1752Radar temperature out of rangeOFFON
C1753Radar blockage detectedOFFON
C1754Radar calibration not completedOFFON
C1768Alignment left compensationONOFF
C1769Alignment right compensationONOFF
C1770Reflector plate in the lowermostONOFF
C1771Reflector plate in the uppermostONOFF
C1772Alignment sensor too far rightONOFF
C1773Alignment sensor too far leftONOFF
C1774Alignment sensor too lowONOFF
C1775Alignment sensor too highONOFF
C1776Received ACC failure from ECMONOFF
C1777System fail detected (ASC)ONOFF
C1778Vehicle speed signal failureONOFF
C1779Brake master pressure signal failureONOFF
C1780A basis signal failureONOFF
C1781SAS failureONOFF
C1782SAS signal failureONOFF
C1783ACC distance switch fixed ONONOFF
C1785Fault detection signal failureONOFF
U0100Engine CAN timeoutONOFF
U0121ABS/ASC CAN timeoutONOFF
U0126SAS CAN timeoutONOFF
U0141ETACS CAN timeoutONOFF
U110APHEV-ECU CAN timeoutONOFF
U1195Coding not completedONOFF