37-TROUBLE CODE DIAGNOSIS

DIAGNOSTIC FUNCTION

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

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 M.U.T.-IIISE system on the personal computer.

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

HOW TO READ AND ERASE DIAGNOSTIC TROUBLE CODES

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 "ECPS/4WS".

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

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 "ECPS/4WS".

5. Select "Data List."

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

HOW TO PERFORM ACTUATOR TEST

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 "ECPS/4WS".

5. Select "Actuator Test".

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

HOW TO DIAGNOSE THE CAN BUS LINES

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 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 FREEZE FRAME DATA

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

When detecting the trouble and storing the DTC, the ECU connected to CAN bus line obtains the data when the DTC is confirmed, and then stores the ECU status of that time. By analyzing each data from scan tool (M.U.T.-IIISE), 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
01	Odometer	Total driving distance when the DTC is generated	km/mile
02	Ignition cycle	Number of times the ignition switch is turned "ON" or "LOCK (OFF)" after the past failure transition	-
04	Accumulated minute	Cumulative time for current malfunction of DTC	min
05	Torque sensor voltage1	Voltage of the torque sensor 1 when the DTC is generated	V
06	Torque sensor voltage2	Voltage of the torque sensor 2 when the DTC is generated	V
07	Torque sensor power supply voltage1	Voltage of torque sensor 1 power supply when the DTC is generated	V
08	Torque sensor power supply voltage2	Voltage of torque sensor 2 power supply when the DTC is generated	V
09	Rotation angle sensor Vx1	Voltage of the motor angle sensor Vx1 signal when the DTC is generated	V
10	Rotation angle sensor Vx2	Voltage of the motor angle sensor Vx2 signal when the DTC is generated	V
11	Rotation angle sensor Vy1	Voltage of the motor angle sensor Vy1 signal when the DTC is generated	V
12	Rotation angle sensor Vy2	Voltage of the motor angle sensor Vy2 signal when the DTC is generated	V
13	System1 U phase current	Current 1 U phase current when the DTC is generated	A
14	System1 V phase current	Current 1 V phase current when the DTC is generated	A
15	System1 W phase current	Current 1 W phase current when the DTC is generated	A
16	System2 U phase current	Current 2 U phase current when the DTC is generated	A
17	System2 V phase current	Current 2 V phase current when the DTC is generated	A
18	System2 W phase current	Current 2 W phase current when the DTC is generated	A
19	System1 U terminal voltage	Voltage 1 U phase voltage when the DTC is generated	V
20	System1 V terminal voltage	Voltage 1 V phase voltage when the DTC is generated	V
21	System1 W terminal voltage	Voltage 1 W phase voltage when the DTC is generated	V
22	System2 U terminal voltage	Voltage 2 U phase voltage when the DTC is generated	V
23	System2 V terminal voltage	Voltage 2 V phase voltage when the DTC is generated	V
24	System2 W terminal voltage	Voltage 2 W phase voltage when the DTC is generated	V
25	System1 PIG voltage	Voltage of the motor (line 1) when the DTC is generated	V
26	System2 PIG voltage	Voltage of the motor (line 2) when the DTC is generated	V
27	IG voltage	Voltage of the EPS-ECU when the DTC is generated	V
28	Vehicle speed	Vehicles speed when the DTC is generated	km/h/mph
29	Steering wheel angle	Steering angle when the DTC is generated	deg
30	Engine speed	Engine speed when the DTC is generated	rpm
31	Ready condition	-	-
32	Steering torque	Steering assist torque when the DTC is generated	-
33	Motor q-axis detection current	Current of motor when the DTC is generated	A
34	Motor q-axis request current	Indication current to motor when the DTC is generated	A
35	Steering wheel angular velocity	Steering angular velocity when the DTC is generated	deg/s
36	Thermistor temperature	Thermistor temperature when the DTC is generated	°C/°F
37	Software operating state	-	-
38	Control mode	-	-
39	Detail diagnostic code	-	-