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2014 - Mazda6 - Steering

ELECTRIC POWER STEERING (EPS) ON-BOARD DIAGNOSIS

On-Board Diagnostic (OBD) Test Description

Read/clear diagnostic results
PID/Data monitor and record

Reading DTCs Procedure

CMDTC self test
1. Connect the M-MDS (IDS) to the DLC-2.
2. After the vehicle is identified, select the following items from the initialization screen of the IDS.
a. Select “Self Test”.
b. Select “All CMDTCs”.
3. Verify the DTC according to the directions on the screen.
4. After completion of repairs, clear all DTCs stored in the EPS. (See Clearing DTCs Procedure.)
ODDTC self test
1. Connect the M-MDS (IDS) to the DLC-2.
2. After the vehicle is identified, select the following items from the initialization screen of the IDS.
a. Select “Self Test”.
b. Select “Modules”.
c. Select “EPS”.
3. Verify the DTC according to the directions on the screen.
4. After completion of repairs, clear all DTCs stored in the EPS. (See Clearing DTCs Procedure.)

Snapshot Data Access Procedure

1. Connect the M-MDS (IDS) to the DLC-2.
2. After the vehicle is identified, select the following items from the initialization screen of the IDS.
a. Select “Self Test”.
b. Select “Modules”.
c. Select “EPS”.
3. Then, select the “Retrieve CMDTCs” and perform procedures according to directions on the IDS screen.
4. Retrieve the freeze frame PID data according to the directions on the IDS screen.

NOTE:

Clearing DTCs Procedure

CMDTC clearing procedure
1. Connect the M-MDS (IDS) to the DLC-2.
2. After the vehicle is identified, select the following items from the initialization screen of the IDS.
a. Select “Self Test”.
b. Select “All CMDTCs”.
3. Verify the DTC according to the directions on the screen.
4. Press the clear button on the DTC screen to clear the DTC.
5. Switch the ignition OFF.
6. Switch the ignition ON (engine off) and wait for 5 s or more.
7. Perform DTC inspection. (See Reading DTCs Procedure.)
8. Verify that no DTCs are displayed.
ODDTC clearing procedure
1. Connect the M-MDS (IDS) to the DLC-2.
2. After the vehicle is identified, select the following items from the initialization screen of the IDS.
a. Select “Self Test”.
b. Select “Modules”.
c. Select “EPS”.
3. Verify the DTC according to the directions on the screen.
4. Press the clear button on the DTC screen to clear the DTC.
5. Switch the ignition OFF.
6. Switch the ignition ON (engine off) and wait for 5 s or more.
7. Perform DTC inspection. (See Reading DTCs Procedure.)
8. Verify that no DTCs are displayed.

PID/Data Monitor and Record Procedure

1. Connect the M-MDS (IDS) to the DLC-2.
2. After the vehicle is identified, select the following items from the initialization screen of the IDS.
a. Select “DataLogger”.
b. Select “Modules”.
c. Select “EPS”.
3. Select the applicable PID from the PID table.
4. Verify the PID data according to the directions on the screen.

NOTE:

DTC Table

×: Applicable

DTC

Power steering malfunction indicator light illumination status

Diagnosis system component

Fail-safe

Drive cycle

Self test type*1

Memory function

Page

M-MDS

C200B:02

Illuminated

Torque sensor

×

Not applicable

C, D

×

(See DTC C200B:02/C200B:49/C200B:62/C200B:85.)

C200B:1C

Illuminated

Torque sensor

×

Not applicable

C, D

×

(See DTC C200B:1C/C200C:1C.)

C200B:49

Illuminated

Torque sensor

×

Not applicable

C, D

×

(See DTC C200B:02/C200B:49/C200B:62/C200B:85.)

C200B:62

Illuminated

Torque sensor

×

Not applicable

C, D

×

C200B:85

Illuminated

Torque sensor

×

Not applicable

C, D

×

C200C:1C

Illuminated

Torque sensor

×

Not applicable

C, D

×

(See DTC C200B:1C/C200C:1C.)

C200D:1C

Illuminated

Resolver sensor

×

Not applicable

C, D

×

(See DTC C200D:1C/C200D:64/U2011:18/U2011:19/U2011:1C/U2011:61/U2011:62/U2011:64/U2011:72.)

C200D:64

Illuminated

Resolver sensor

×

Not applicable

C, D

×

U0001:88

Illuminated

CAN system communication error

×

Not applicable

C, D

×

(See DTC U0001:88/U0100:00/U0121:00/U0155:00.)

U0100:00

Illuminated

Communication error to PCM

×

Not applicable

C, D

×

U0121:00

Not applicable

Communication error to DSC CM

×

Not applicable

C, D

×

U0155:00

Not applicable

Communication error to instrument cluster

×

Not applicable

C, D

×

U0338:00

Not applicable

Signal error from start stop unit

×

Not applicable

C, D

×

(See DTC U0338:00/U0515:00.)

U0401:00

Illuminated

Signal (vehicle speed) error from PCM

×

Not applicable

C, D

×

(See DTC U0401:00.)

Not applicable

Signal (engine speed) error from PCM

×

Not applicable

C, D

×

Not applicable

Signal (i-stop status) error from PCM

×

Not applicable

C, D

×

U0415:00

Not applicable

Signal error from DSC CM

×

Not applicable

C, D

×

(See DTC U0415:00.)

U0515:00

Not applicable

Signal error from start stop unit

×

Not applicable

C, D

×

(See DTC U0338:00/U0515:00.)

U2011:18

Illuminated

EPS motor

×

Not applicable

C, D

×

(See DTC C200D:1C/C200D:64/U2011:18/U2011:19/U2011:1C/U2011:61/U2011:62/U2011:64/U2011:72.)

U2011:19

Illuminated

EPS motor

×

Not applicable

C, D

×

U2011:1C

Illuminated

EPS motor

×

Not applicable

C, D

×

U2011:61

Illuminated

EPS motor

×

Not applicable

C, D

×

U2011:62

Illuminated

EPS motor

×

Not applicable

C, D

×

U2011:64

Illuminated

EPS motor

×

Not applicable

C, D

×

U2011:72

Illuminated

EPS motor

×

Not applicable

C, D

×

U2300:54

Not applicable

EPS configuration

×

Not applicable

C, D

×

(See DTC U2300:54/U2300:55/U2300:56.)

U2300:55

Illuminated

EPS configuration

×

Not applicable

C, D

×

U2300:56

Not applicable

EPS configuration

×

Not applicable

C, D

×

U3000:16

Illuminated

EPS CM

×

Not applicable

C, D

×

(See DTC U3000:16/U3000:1C/U3000:28/U3000:41/U3000:44/U3000:46/U3000:47/U3000:49/U3000:61/U3000:62/U3000:73/U3000:96.)

U3000:1C

Illuminated

EPS CM

×

Not applicable

C, D

×

U3000:28

Illuminated

EPS CM

×

Not applicable

C, D

×

U3000:41

Illuminated

EPS CM

×

Not applicable

C, D

×

U3000:44

Illuminated

EPS CM

×

Not applicable

C, D

×

U3000:46

Not applicable

EPS CM

×

Not applicable

C, D

×

U3000:47

Illuminated

EPS CM

×

Not applicable

C, D

×

U3000:49

Illuminated

EPS CM

×

Not applicable

C, D

×

U3000:4B

Not applicable

EPS CM

×

Not applicable

C, D

×

(See DTC U3000:4B.)

U3000:61

Illuminated

EPS CM

×

Not applicable

C, D

×

(See DTC U3000:16/U3000:1C/U3000:28/U3000:41/U3000:44/U3000:46/U3000:47/U3000:49/U3000:61/U3000:62/U3000:73/U3000:96.)

U3000:62

Illuminated

EPS CM

×

Not applicable

C, D

×

U3000:73

Illuminated

EPS CM

×

Not applicable

C, D

×

U3000:96

Illuminated

EPS CM

×

Not applicable

C, D

×

U3003:16

Illuminated

Battery power supply

×

Not applicable

C, D

×

(See DTC U3003:16.)

U3003:17

Illuminated

Battery power supply

×

Not applicable

C, D

×

(See DTC U3003:17.)

*1
C: CMDTC self test, D: ODDTC self test

Fail-safe Function Table



DTC

Fail-safe control status

M-MDS

C200B:02

Control disabled

C200B:1C

Control disabled

C200B:49

Control disabled

C200B:62

Control disabled

C200B:85

Control disabled

C200C:1C

Control disabled

C200D:1C

Control disabled

C200D:64

Control disabled

U0001:88

Control enabled

U0100:00

Control is maintained by gradually changing the controlled vehicle speed and setting it to 120 km/h {74.6 mph}

U0121:00

Control enabled

U0155:00

Control enabled

U0338:00

Control enabled

U0401:00

  • Vehicle speed signal malfunction

    • Control is maintained by gradually changing the controlled vehicle speed and setting it to 120 km/h {74.6 mph}

  • Engine speed signal malfunction

    • Control enabled

  • i-stop status signal malfunction

    • EPS i-stop control is not operated, and normal control is maintained

U0415:00

Control enabled

U0515:00

Control enabled

U2011:18

Control disabled

U2011:19

Control disabled

U2011:1C

Control disabled

U2011:61

Control disabled

U2011:62

Control disabled

U2011:64

Control disabled

U2011:72

  • Phase 1 open circuit malfunction is detected in the EPS motor

    • Control is maintained in the backup control

  • Other malfunction detected in EPS motor internal circuit

    • Control disabled

U2300:54

Control enabled

U2300:55

Control enabled

U2300:56

Control enabled

U3000:16

Control disabled

U3000:1C

Control disabled

U3000:28

Control disabled

U3000:41

Control disabled

U3000:44

Control disabled

U3000:46

Control is maintained in fail mode

U3000:47

Control disabled

U3000:49

Control disabled

U3000:4B

Control is maintained in fail mode

U3000:61

Control disabled

U3000:62

Control disabled

U3000:73

Control disabled

U3000:96

Control disabled

U3003:16

Control is maintained by gradually decreasing the motor control current

However, control is inhibited if the power supply voltage is the specified value of less.

U3003:17

Control disabled

PID/DATA Monitor Table

NOTE:



PID name (definition)

Unit/Operation

Operation Status (Reference)

Inspection item(s)

EPS control module terminal

M-MDS display

CEN_TRQ_S

Nm

  • Torque sensor neutral position: Near 0 Nm

Not applicable

ECU_IN_TMP

°C, °F

  • Displays temperature of board in EPS control module: -40°C—+215°C {-40°F—419°F}

Not applicable

ENG_RPM

RPM

  • Engine stopped: 0 RPM

  • Engine rotating at 3,000 RPM: 3,000 RPM

Not applicable

MT_CURRENT

A

  • When not steered: Near 0 A

  • Steered: Changes to positive or negative

Not applicable

OH_CR_C

Yes/No

  • Is the overheating prevention control (Complete) operating?

Not applicable

Not applicable

OH_CR_M

Yes/No

  • Is the overheating prevention control (Middle) operating?

Not applicable

Not applicable

OH_HIST_C

Yes/No

  • Has the overheating prevention control (Complete) operated before?

Not applicable

Not applicable

OH_HIST_M

Yes/No

  • Has the overheating prevention control (Middle) operated before?

Not applicable

Not applicable

OH_IG_CNT_C

Not applicable

  • History of overheating prevention control (Complete)

  • Number of times vehicle is driven (ignition switched ON (engine off or on)) after overheating prevention control operates

Not applicable

Not applicable

OH_IG_CNT_M

Not applicable

  • History of overheating prevention control (Middle)

  • Number of times vehicle is driven (ignition switched ON (engine off or on)) after overheating prevention control operates

Not applicable

Not applicable

STR_ANG

°

  • Steering wheel position when ignition is switched ON (engine off or on): 0°

  • Steered left: Changes to 0°—Positive

  • Steered right: Changes to 0°—Negative

    NOTE:

    • The signal displayed in this item is a steering angle (relative angle) signal.

Perform the DTC inspection for the PCM, DSC HU/CM, and EPS CM.

If a DTC is displayed after performing the DTC inspection for the PCM, DSC HU/CM, and EPS CM, repair the malfunctioning part according to the applicable DTC troubleshooting.

(See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-G 2.5].) (See ON-BOARD DIAGNOSIS [DYNAMIC STABILITY CONTROL (DSC)].) (See EPS CONTROL MODULE INSPECTION.)

After performing the DTC inspection, perform the following procedures:

  • Switch the ignition off and maintain condition for approx. 3 s.

  • Set the vehicle wheels straight-ahead.

  • Switch the ignition ON (engine off or on).

If an abnormal value is indicated after verifying the value of the STR_ANG again, replace the EPS CM.

Not applicable

STR_ROT_SPD

°/s

  • Not steered: Near 0 °/s

  • Steered: Changes according to steering speed

Not applicable

STR_TRQ_S_M

Nm

  • Not steered: Near 0 Nm

  • Steered left: Changes to 0 Nm—Positive

  • Steered right: Changes to 0 Nm—Negative

Not applicable

STR_TRQ_S_S

Nm

  • Not steered: Near 0 Nm

  • Steered left: Changes to 0 Nm—Positive

  • Steered right: Changes to 0 Nm—Negative

Not applicable

VPWR

V

  • Engine stopped: Approx. 12 V

  • Idling: Approx. 14 V

1B

VSPD

KPH, MPH

  • Vehicle stopped: 0 KPH, 0 MPH

  • Vehicle speed 20 km/h {12 mph} : 20 KPH, 12 MPH

Not applicable

Snapshot Data Table

NOTE:



Snapshot data item

Unit

Data contents

Data read/use method

Corresponding data monitor items

AAT

°C, °F

Ambient air temperature

Not applicable

Not applicable

APP_STATUS

Accelerator Pedal Off/

Under 20%/

Over 20%/

FAIL

Accelerator pedal position

Not applicable

Not applicable

CEN_TRQ_S

Nm

Center value of torque sensor

CEN_TRQ_S

CEN_TRQ_S

CFG_STATUS

Config Complete/

Not Configured/

Config Error

Instrument cluster configuration status

Not applicable

Not applicable

ECT_STATUS

Under 0 degrees C/

0 - Under 80 degrees C/

Over 80 degrees C/

FAIL

Engine coolant temperature status

Not applicable

Not applicable

ECU_IN_TMP

°C, °F

ECU internal temperature

ECU_IN_TMP

ECU_IN_TMP

ENG_RPM

RPM

Engine speed

ENG_RPM

ENG_RPM

IC_VPWR

V

Instrument cluster power supply

  • The EPS CM constantly receives the power supply voltage value of the instrument cluster sent via CAN signal from the instrument cluster.

  • If a DTC is detected, the EPS CM records the power supply voltage of the instrument cluster when the DTC was detected, and it is displayed in the M-MDS.

VPWR*2

IG-ON_TIMER

hh:mm:ss*1

Elapsed time since ignition was switched ON

NOTE:

  • The instrument cluster records the elapsed time since the ignition was switched ON.

  • The EPS CM constantly receives the elapsed time since the ignition was switched ON sent via CAN signal from the instrument cluster.

  • If a DTC is detected, the EPS CM records the elapsed time since the ignition was switched ON when the DTC was detected, and it is displayed in the M-MDS.

Not applicable

MT_CURRENT

A

Motor current

MT_CURRENT

MT_CURRENT

OH_CR_C

No/Yes

Current complete overheat protection

OH_CR_C

OH_CR_C

OH_CR_M

No/Yes

Current middle overheat protection

OH_CR_M

OH_CR_M

OH_HIST_C

No/Yes

History of complete overheat protection

OH_HIST_C

OH_HIST_C

OH_HIST_M

No/Yes

History of middle overheat protection

OH_HIST_M

OH_HIST_M

OH_IG_CNT_C

—

IG ON counter after complete overheat protection

OH_IG_CNT_C

OH_IG_CNT_C

OH_IG_CNT_M

—

IG ON counter after middle overheat protection

OH_IG_CNT_M

OH_IG_CNT_M

PWR_MODE_KEY

Key Out/

Key Recently Out/

Key Approved(Position 0)/

Post Accessory (Position 0)/

Accessory (Position 1)/

Post Ignition (Position 1)/

Ignition On (Position 2)/

Running (Position 2)/

Running - Starting In Progress (Position 2)/

Crank (Position 3)

  • Key Out: Ignition switched off

  • Key Recently Out (Position 0): Elapsed time within 3 s since ignition was switched off

  • Accessory (Position 1): Ignition is switched to ACC

  • Post Ignition (Position 2): Elapsed time within 3 s since ignition was switched ON

  • Ignition On (Position 2): Ignition switched ON (engine off)

  • Running (Position 2): Ignition switched ON (engine on)

  • Running - Starting: Cranking condition

  • The EPS CM constantly receives the ignition switch status sent via CAN signal from the instrument cluster.

  • If a DTC is detected, the EPS CM records the ignition switch status when the DTC was detected, and it is displayed in the M-MDS.

Not applicable

RPM_STATUS

Engine Stop/

Under 1500rpm/

Over 1500rpm/

FAIL

Engine RPM status

  • The EPS CM constantly receives the ignition switch status sent via CAN signal from the instrument cluster.

  • If a DTC is detected, the EPS CM records the ignition switch status when the DTC was detected, and it is displayed in the M-MDS.

TACHOMTR*2

SHIFT_STATUS

P/N

D/

R/

FAIL

Shift position status

  • The EPS CM constantly receives the selector lever position sent via CAN signal from the instrument cluster.

  • If a DTC is detected, the EPS CM records the selector lever position when the DTC was detected, and it is displayed in the M-MDS.

Not applicable

STR_ANG

°

Steering wheel angle

STR_ANG

STR_ANG

STR_ROT_SPD

°/s

Steering wheel rotation speed

STR_ROT_SPD

STR_ROT_SPD

STR_TRQ_S_M

Nm

Steering shaft torque (Main)

STR_TRQ_S_M

STR_TRQ_S_M

STR_TRQ_S_S

Nm

Steering shaft torque (Sub)

STR_TRQ_S_S

STR_TRQ_S_S

TOTAL_DIST

km, ft, mi

Accumulated total traveled distance from completion of vehicle until EPS CM detects DTC (Odometer value in instrument cluster)

The distance traveled when the EPS CM detected a DTC can be calculated by performing the following procedure.

  • Verify the odometer value in the instrument cluster.

  • Verify the snap shot data item TOTAL_DIST.

  • Subtract 2 from 1.

Not applicable

TOTAL_TIME

hh:mm:ss*1

Accumulated total elapsed time since vehicle completion until EPS CM detects a DTC

NOTE:

  • When the ROOM removed, and the ignition is switched off, the time is not included in the elapsed time.

The elapsed time when the EPS CM detected a DTC can be calculated by performing the following procedure.

  • Verify the PID item TOTAL_TIME of the instrument cluster.

  • Verify the snap shot data item TOTAL_TIME.

  • Subtract 2 from 1.

TOTAL_TIME*2

VPWR

V

Power supply

VPWR

VPWR

VSPD

KPH, MPH

Vehicle speed

VSPD

VSPD

VSPD_STATUS

Stop/

0 - 10km/h/

Over 10km/h/

FAIL

Vehicle speed status

  • The EPS CM constantly receives the vehicle speed sent via CAN signal from the instrument cluster.

  • If a DTC is detected, the EPS CM records the vehicle speed when the DTC was detected, and it is displayed in the M-MDS.

SPEEDOMTR*2

*1
The seconds may be indicated after the decimal point.
*2
Instrument cluster PID (See PID/DATA MONITOR TABLE [INSTRUMENT CLUSTER].)


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