42A-TROUBLE CODE DIAGNOSIS

DIAGNOSTIC FUNCTION <VEHICLES WITH ONE-TOUCH OPENING/CLOSING MECHANISM FOR ALL WINDOWS>

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

caution

To prevent damage to scan tool (M.U.T.-IIISE), always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool (M.U.T.-IIISE).

1. Ensure that the ignition switch is at the "LOCK" (OFF) position.

2. Start up the personal computer.

3. Connect special tool MB992747/M992748 to special tool MB992744 and the personal computer.

4. Connect special tool MB992745 to special tool MB992744.

5. Connect special tool MB992745 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.

6. Start the scan tool (M.U.T.-IIISE) system on the personal computer.

note	Disconnecting scan tool (M.U.T.-IIISE) is the reverse of the connecting sequence, making sure that the ignition switch is at the "LOCK" (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

note	If the battery voltage is low, diagnostic trouble codes will not be set. Check the 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 the ignition switch to the "ON" position.

3. Select "STV."

4. Select "LIN" from "System List," and press the "OK" button.

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-Line (V.C.I.-Line)
MB992745: V.C.I.-Line main harness A (for vehicle with CAN communication)
MB992747: V.C.I.-Line USB cable short
MB992748: V.C.I.-Line USB cable long

1. Connect scan tool (M.U.T.-IIISE) to the data link connector.

2. Turn the ignition switch to the "ON" position.

3. Select "STV."

4. Select "LIN" from "System List," and press the "OK" button.

5. Select "Data List."

6. Choose an appropriate item and select the "OK" button.

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

1. Connect scan tool (M.U.T.-IIISE) 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 optional equipment screen is displayed, choose the one which the vehicle is fitted with, and then select the "OK" button.

FAIL-SAFE FUNCTION

The control is carried out, which keeps the safety driving by the preset control logic when the DTC is set. The DTC having the fail-safe function is as follows.

List of fail-safe function items

DTC No.	Diagnostic item	Fail safe control
L0734	P/W(DR) Above window position	Automatic operation of the power window (driver's side) is prohibited (It will be manual operation even during AUTO operation). When UP operation of the power window (driver's side), it will operate in inching operation^*. The fully closed position learning state of the power window (driver's side) will be incomplete.
L0740	P/W(DR) Jam-protection
L0750	P/W(DR) Position read fail
L0760	P/W(DR) Ripple current fail
L0746	P/W(DR) Parameter read fail	-
L0762	P/W(DR) Motor current fail	-
L0764	P/W(DR) +B Voltage fail	The power window operation interrupts.
L0834	P/W(AS) Above window position	Automatic operation of the power window (passenger's side) is prohibited (It will be manual operation even during AUTO operation). When UP operation of the power window (passenger's side), it will operate in inching operation^*. The fully closed position learning state of the power window (passenger's side) will be incomplete.
L0840	P/W(AS) Jam-protection
L0850	P/W(AS) Position read fail
L0860	P/W(AS) Ripple current fail
L0846	P/W(AS) Parameter read fail	-
L0862	P/W(AS) Motor current fail	-
L0934	P/W(RL) Above window position	Automatic operation of the rear power window (LH) is prohibited (It will be manual operation even during AUTO operation). When UP operation of the rear power window (LH), it will operate in inching operation^*. The fully closed position learning state of the rear power window (LH) will be incomplete.
L0940	P/W(RL) Jam-protection
L0950	P/W(RL) Position read fail
L0960	P/W(RL) Ripple current fail
L0946	P/W(RL) Parameter read fail	-
L0962	P/W(RL) Motor current fail	-
L0A34	P/W(RR) Above window position	Automatic operation of the rear power window (RH) is prohibited (It will be manual operation even during AUTO operation). When UP operation of the rear power window (RH), it will operate in inching operation^*. The fully closed position learning state of the rear power window (RH) will be incomplete.
L0A40	P/W(RR) Jam-protection
L0A50	P/W(RR) Position read fail
L0A60	P/W(RR) Ripple current fail
L0A46	P/W(RR) Parameter read fail	-
L0A62	P/W(RR) Motor current fail	-

note	^*: After the power window is operated for 0.7 seconds at one switch operation, it stops automatically.