Subaru Legacy BN/BS (2015-2019) Service Manual: Operation

Subaru Legacy BN/BS (2015-2019) Service Manual / Power assisted system (power steering) (diagnostics) / Subaru select monitor / Operation

1. HOW TO USE SUBARU SELECT MONITOR

For detailed operation procedures, refer to “Application help”.

2. READ CURRENT DATA

1. On «Start» display, select «Diagnosis».

2. On «Vehicle selection» display, input the vehicle information and select «Confirmed».

3. On «Main Menu» display, select «Each System Check».

4. On «Select System» display, select «Power Steering».

5. On «Select Function» display, select «Data Monitor».

Display	Contents to be displayed	Range	Unit
Torque sensor main output	Main torque sensor output voltage is displayed.	0 — 5	V
Torque sensor sub output	Sub torque sensor output voltage is displayed.	0 — 5	V
Vehicle Speed	Vehicle speed is displayed. (CAN communication data)	0 — 255	km/h
Engine Speed	Engine speed is displayed. (CAN communication data)	0 — 12750	rpm
CU Sensing Current(q)	The current flowing to the motor relay is displayed.	−128 — 127	A
3-phase motor current (U-phase)	The U phase actual current value as calculated by the microcomputer from the torque sensor input is displayed.	−128 — 127	A
3-phase motor current (V-phase)	The V phase actual current value as calculated by the microcomputer from the torque sensor input is displayed.	−128 — 127	A
Motor angular speed	Data from the resolver sensor is displayed.	−4096 — 4064	rpm
CU Temperature	The thermistor temperature of the steering control module is displayed.	−50 — 205	°C
Power supply voltage	Battery voltage is displayed.	0 — 25.5	V
Torque sensor power supply voltage	The power supply voltage output to the torque sensor is displayed.	0 — 10.2	V
IG Voltage	The power supply voltage supplied to the ECM is displayed.	0 — 25.5	V
CAN Bus Status	Either Active/Passive/Bus Off is displayed.	—	—
EPS Status	Either Normal/Assist Stop/Assist Limitation is displayed.	—	—
CU Target current(q)	The motor target current value required for assist is displayed.	−128 — 127	A
Steering Angle	Steering angle of steering wheel is displayed.	−640 — 635	deg
Overheating protection intervention history	Number of interventions to the overheat protection control (assist limitation for protecting the power steering from overheating)*1	0 — 250	times
IG Count after ECU Overheat Protection(latest)	Number of times the ignition switch is ON from the intervention to overheat protection control (most recent) until now*2	0 — 65000	times
IG Count after ECU Overheat Protection(Previous)	Number of times the ignition switch is ON from the intervention to overheat protection control (previous) until now*2	0 — 65000	times
IG Count after ECU Overheat Protection(Before Previous)	Number of times the ignition switch is ON from the intervention to overheat protection control (before previous) until now*2	0 — 65000	times
Assist limit history (low voltage)	Number of intervention to assist limit when the power supply voltage is low*1	0 — 250	times
Torque Sensor Amplifier	Torque sensor control voltage is displayed.	0 — 5	V
Motor Current	The current flowing to the motor relay is displayed.	−128 — 127	Arms

NOTE:

• *1 When the value exceeds the maximum of 250 times, 250 is displayed.

• *2 When there is no intervention of the overheating protection control, “65535” is displayed. If an error such as control unit memory error, etc. occurs, “65534” is displayed.

• For detailed operation procedures, refer to “Application help”.

3. FREEZE FRAME DATA

1. On «Start» display, select «Diagnosis».

2. On «Vehicle selection» display, input the vehicle information and select «Confirmed».

3. On «Main Menu» display, select «Each System Check».

4. On «Select System» display, select «Power Steering».

5. On «Select Function» display, select «DTC».

6. On «DTC» display, select «FFD».

Display	Contents to be displayed	Range	Unit
Torque sensor main output	Main torque sensor output voltage is displayed.	0 — 5	V
Torque sensor sub output	Sub torque sensor output voltage is displayed.	0 — 5	V
Vehicle Speed	Vehicle speed is displayed. (CAN communication data)	0 — 255	km/h
Engine Speed	Engine speed is displayed. (CAN communication data)	0 — 12750	rpm
CU Sensing Current(q)	The current flowing to the motor relay is displayed.	−128 — 127	A
3-phase motor current (U-phase)	The U phase actual current value as calculated by the microcomputer from the torque sensor input is displayed.	−128 — 127	A
3-phase motor current (V-phase)	The V phase actual current value as calculated by the microcomputer from the torque sensor input is displayed.	−128 — 127	A
Motor angular speed	Data from the resolver sensor is displayed.	−4096 — 4064	rpm
CU Temperature	The thermistor temperature of the steering control module is displayed.	−50 — 205	°C
Power supply voltage	Battery voltage is displayed.	0 — 25.5	V
Torque sensor power supply voltage	The power supply voltage output to the torque sensor is displayed.	0 — 10.2	V
IG Voltage	The power supply voltage supplied to the ECM is displayed.	0 — 25.5	V
CAN Bus Status	Either Active/Passive/Bus Off is displayed.	—	—
EPS Status	Either Normal/Assist Stop/Assist Limitation is displayed.	—	—
CU Target current(q)	The motor target current value required for assist is displayed.	−128 — 127	A
Steering Angle	Steering angle of steering wheel is displayed.	−640 — 635	deg
Overheating protection intervention history	Number of interventions to the overheat protection control (assist limitation for protecting the power steering from overheating)*1	0 — 250	times
IG Count after ECU Overheat Protection(latest)	Number of times the ignition switch is ON from the intervention to overheat protection control (most recent) until now*2	0 — 65000	times
IG Count after ECU Overheat Protection(Previous)	Number of times the ignition switch is ON from the intervention to overheat protection control (previous) until now*2	0 — 65000	times
IG Count after ECU Overheat Protection(Before Previous)	Number of times the ignition switch is ON from the intervention to overheat protection control (before previous) until now*2	0 — 65000	times
Assist limit history (low voltage)	Number of intervention to assist limit when the power supply voltage is low*1	0 — 250	times
Torque Sensor Amplifier	Torque sensor control voltage is displayed.	0 — 5	V
Motor Current	The current flowing to the motor relay is displayed.	−128 — 127	Arms

NOTE:

• *1 When the value exceeds the maximum of 250 times, 250 is displayed.

• *2 When there is no intervention of the overheating protection control, “65535” is displayed. If an error such as control unit memory error, etc. occurs, “65534” is displayed.

• Freeze frame data stored at the time of trouble occurrence is shown on the display.

• Data of the first trouble occurrence is stored as the freeze frame data in memory.

• Three freeze frame data are stored.

• For detailed operation procedures, refer to “Application help”.

Inspection

1. COMMUNICATION FOR INITIALIZING IMPOSSIBLEDETECTING CONDITION:• Defective harness connector• Defective power steering control moduleTROUBLE SYMPTOM:• Communication is impossible be ...

Other materials:

Removal
WARNING:Place “NO OPEN FLAMES” signs near the working area.CAUTION:• Be careful not to spill fuel.• Catch the fuel from the tubes using a container or cloth.• If the fuel gauge indicates that two thirds or more of the fuel is remaining, be sure to drain fuel before star ...