54A-DIAGNOSTIC FUNCTION

DIAGNOSTIC FUNCTION

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 (Vehicles with CAN communication system)

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 M.U.T.-III 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 READ AND ERASE DIAGNOSTIC TROUBLE CODES

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 (Vehicles with CAN communication system)

note	If the battery voltage is low, diagnostic trouble codes will not be set. Check the battery if scan tool MB991958 does not display.

1. Connect scan tool MB991958 to the data link connector.

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

3. Select "System select" from the start-up screen.

4. Select "From 2006 MY" of "Model Year." When the "Vehicle Information" is displayed, check the contents.

5. Select "BSW" or "BSW(SUB)" from "System List", and press the "OK" button.

note	When the "Loading Option Setup" list is displayed, check the applicable item.

6. Select "Diagnostic Trouble Code" to read the DTC.

7. If a DTC is set, it is shown.

8. Choose "Erase DTCs" to erase the DTC.

HOW TO DIAGNOSE THE CAN BUS LINES

Refer to GROUP 54C, CAN Bus Diagnosis

CHECK OF FREEZE FRAME DATA

The freeze frame data can be checked by using the scan tool (M.U.T.-III).

When detecting fault and storing the DTC, the ECU connected to CAN bus line obtains the data before the determination of the DTC and the data when the DTC is determined, and then stores the ECU status of that time. By analyzing each data from scan tool (M.U.T.-III), the troubleshooting can be performed more efficiently. The displayed items are as the table below.

Display item list

Item No.	Item name	Data item	Unit
1	Odometer	Total driving distance after the DTC is generated	km
2	Ignition cycle	Number of times the ignition switch is turned "LOCK" (OFF) or "ACC" after the past failure transition	Number of counts.
4	Accumulative minute	Accumulative time for current malfunction of DTC	min

FAIL-SAFE FUNCTIONS

When the BSW-ECU (master/slave) detects a malfunction, the warning light will illuminate or the system will be disabled.

DTC No.	Warning contents	Factor	Blind spot warning light on door mirror	Blind spot warning light on combination meter	Blind spot warning screen on multi information display	Fail-safe
C2320	Trouble detection	Refer to the Diagnostic trouble code Chart <BSW-ECU (master)> or <BSW-ECU (slave)>.	-	No indication		The functions of the BSW and the RCTA other than self-diagnosis and status monitor are disabled.
C2321
C2322
C2323
C2324
C2325	Radar axis out of position	Refer to the Diagnostic trouble code Chart <BSW-ECU (master)> or <BSW-ECU (slave)>.	-	ON		The functions of the BSW and the RCTA other than self-diagnosis and status monitor are disabled.
C2326	Radar axis out of position		-	ON
C2327	Intermittent malfunction detection	Refer to the Diagnostic trouble code Chart <BSW-ECU (master)> or <BSW-ECU (slave)>.	-	ON		The functions of the BSW and the RCTA other than self-diagnosis and status monitor are disabled.
C2328	Implausible voltage	Refer to the Diagnostic trouble code Chart <BSW-ECU (master)> or <BSW-ECU (slave)>.	-	ON		The functions of the BSW and the RCTA other than self-diagnosis and status monitor are disabled.
C2329
C2330
C2331	Trouble detection	Refer to the Diagnostic trouble code Chart <BSW-ECU (master)> or <BSW-ECU (slave)>.	-	No indication		The functions of the BSW and the RCTA other than self-diagnosis and status monitor are disabled.
C2332
C2333
C2334
C2335
C2336
U0101
U0121
U0126
U0141
U0147
U1195