ELECTRIC POWER STEERING (EPS) ON-BOARD DIAGNOSIS

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On-Board Diagnostic (OBD) Test Description

•  The OBD test inspects the integrity and function of the EPS and outputs the results when requested by the specific tests.
•  On-board diagnostic test also:
―  Provides a quick inspection of the EPS usually performed at the start of each diagnostic procedure.
―  Provides verification after repairs to ensure that no other faults occurred during service.
•  The OBD test is divided into 2 tests:
―  Read/clear diagnostic results, PID/Data monitor and record.

Read/clear diagnostic results

•  This function allows reading or clearing of DTCs in the EPS control module memory.


PID/Data monitor and record

•  This function allows access of certain data values, input signals, calculated values, and system status information.


Reading DTCs Procedure

1.  Connect the M-MDS (IDS) to the DLC-2.

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2.  After the vehicle is identified, select the following items from the initialization screen of the IDS.

(1)  Select “Self Test”.
(2)  Select “Modules”.
(3)  Select “EPS”.

3.  Verify the DTC according to the directions on the screen.

•  If any DTCs are displayed, perform troubleshooting according to the corresponding DTC inspection.

4.  After completion of repairs, clear all DTCs stored in the EPS CM. (See Clearing DTCs Procedures.)


Clearing DTCs Procedures

1.  Connect the M-MDS (IDS) to the DLC-2.

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2.  After the vehicle is identified, select the following items from the initialization screen of the IDS.

(1)  Select “Self Test”.
(2)  Select “Modules”.
(3)  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 to off.

6.  Switch the ignition to ON 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.

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2.  After the vehicle is identified, select the following items from the initialization screen of the IDS.

(1)  Select “DataLogger”.
(2)  Select “Modules”.
(3)  Select “EPS”.

3.  Select the applicable PID from the PID table.

4.  Verify the PID data according to the directions on the screen.

Note
•  The PID data screen function is used for monitoring the calculated value of input/output signals in the module. Therefore, if the monitored value of the output parts is not within the specification, it is necessary to inspect the monitored value of input parts corresponding to the applicable output part control. In addition, because the system does not display an output part malfunction as an abnormality in the monitored value, it is necessary to inspect the output parts individually.
•  When detecting DTCs, PIDs related to a malfunctioning system may not display even if the module is normal. Therefore, if a PID is not displayed, it is necessary to verify the DTC, perform malfunction diagnosis of the DTC that was detected, and do repairs.

DTC Table

DTC

Diagnosis system component

Page

M-MDS
C1B00:2F
Steering angle sensor
(See DTC C1B00:2F/C1B00:61/C1B00:62.)
C1B00:54
Steering angle sensor
(See DTC C1B00:54, C1B00:95.)
C1B00:61
Steering angle sensor
(See DTC C1B00:2F/C1B00:61/C1B00:62.)
C1B00:62
Steering angle sensor
(See DTC C1B00:2F/C1B00:61/C1B00:62.)
C1B00:95
Steering angle sensor (mis-assembly)
(See DTC C1B00:54, C1B00:95.)
C200B:2F
Torque sensor
(See DTC C200B:2F/C200B:61/C200C:2F.)
C200B:61
Torque sensor
(See DTC C200B:2F/C200B:61/C200C:2F.)
C200C:2F
Torque sensor
(See DTC C200B:2F/C200B:61/C200C:2F.)
C200D:49
EPS motor
(See DTC C200D:49/U2011:49/U2011:61.)
U0001:88
CAN system communication error
(See DTC U0001:88.)
U0100:00
CAN system communication error
(See DTC U0100:00.)
U0300:00
EPS CM
(See DTC U0300:00.)
U0401:00
CAN system communication error
(See DTC U0401:00.)
U2011:49
EPS motor
(See DTC C200D:49/U2011:49/U2011:61.)
U2011:61
EPS motor
(See DTC C200D:49/U2011:49/U2011:61.)
U2100:00
EPS configuration
(See DTC U2100:00.)
U3000:05
EPS CM
(See DTC U3000:05/U3000:41/U3000:43/U3000:46/U3000:49/U3000:61/U3000:96.)
U3000:41
EPS CM
(See DTC U3000:05/U3000:41/U3000:43/U3000:46/U3000:49/U3000:61/U3000:96.)
U3000:43
EPS CM
(See DTC U3000:05/U3000:41/U3000:43/U3000:46/U3000:49/U3000:61/U3000:96.)
U3000:46
EPS CM
(See DTC U3000:05/U3000:41/U3000:43/U3000:46/U3000:49/U3000:61/U3000:96.)
U3000:49
EPS CM
(See DTC U3000:05/U3000:41/U3000:43/U3000:46/U3000:49/U3000:61/U3000:96.)
U3000:61
EPS CM
(See DTC U3000:05/U3000:41/U3000:43/U3000:46/U3000:49/U3000:61/U3000:96.)
U3000:96
EPS CM
(See DTC U3000:05/U3000:41/U3000:43/U3000:46/U3000:49/U3000:61/U3000:96.)
U3003:16
Battery power supply
(See DTC U3003:16/U3003:17.)
U3003:17
Battery power supply
(See DTC U3003:16/U3003:17.)
U3004:49
EPS CM
(See DTC U3004:49.)


PID/DATA Monitor Table

PID name (definition)

Unit/Operation

Operation Status (Reference)

Inspection item(s)

EPS control module terminal

M-MDS display
BOARD_T
°C, °F
•  Displays temperature of board in EPS control module: -40°C—+215°C {-40°F—419°F}
•  Steering column replacement (See STEERING WHEEL AND COLUMN REMOVAL/INSTALLATION [L.H.D.].)
—
DTC_CNT
—
•  When DTC detected: 1—255
•  When DTC not detected: 0
•  DTC inspection (See ELECTRIC POWER STEERING (EPS) ON-BOARD DIAGNOSIS.)
—
ENG_RPM
RPM
•  Engine stopped: 0 RPM
•  Engine rotating at 3,000 RPM: 3,000 RPM
•  PCM inspection (See PCM INSPECTION [MZR 1.3, MZR 1.5].) (See PCM INSPECTION [MZ-CD 1.6].)
—
MTR_CUR
A
•  When not steered: Near 0 A
•  Steered: Changes to positive or negative
•  Steering column replacement (See STEERING WHEEL AND COLUMN REMOVAL/INSTALLATION [L.H.D.].)
—
SS_TRQ1
Nm
•  Not steered: Near 0 Nm
•  Steered left: Changes to 0 Nm—Positive
•  Steered right: Changes to 0 Nm—Negative
•  Steering column replacement (See STEERING WHEEL AND COLUMN REMOVAL/INSTALLATION [L.H.D.].)
—
SS_TRQ2
Nm
•  Not steered: Near 0 Nm
•  Steered left: Changes to 0 Nm—Positive
•  Steered right: Changes to 0 Nm—Negative
•  Steering column replacement (See STEERING WHEEL AND COLUMN REMOVAL/INSTALLATION [L.H.D.].)
—
STEER_ANGL
°
•  Steering in neutral position
•  Steered left: Changes to 0°—Positive
•  Steered right: Changes to 0°—Negative
•  EPS steering angle calibration (See EPS STEERING ANGLE CALIBRATION.)
—
STEER_SPD
°/s
•  Not steered: Near 0 °/s
•  Steered: Changes according to steering speed
•  Steering column replacement (See STEERING WHEEL AND COLUMN REMOVAL/INSTALLATION [L.H.D.].)
—
VPWR
V
•  Engine stopped: Approx. 12 V
•  Idling: Approx. 14 V
•  Battery inspection (See BATTERY INSPECTION [MZR 1.3, MZR 1.5].) (See BATTERY INSPECTION [MZ-CD 1.6].)
•  Power supply circuit inspection (ignition switch, fuses)
3A
VSPD
KPH, MPH
•  Vehicle stopped: 0 KPH, 0 MPH
•  Vehicle speed 20 km/h {12 mph}: 20 KPH, 12 MPH
•  PCM inspection (See PCM INSPECTION [MZR 1.3, MZR 1.5].) (See PCM INSPECTION [MZ-CD 1.6].)
•  ABS HU/CM inspection (See ABS HU/CM INSPECTION.)
—