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 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.


Active command modes

•  This function allows control of devices through the M-MDS.


Reading DTCs Procedure

1.  Connect the M-MDS to the DLC-2.

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2.  After the vehicle is identified, select the following items from the initialization screen of the M-MDS.

•  When using the IDS (laptop PC)
1.  Select “Self Test”.
2.  Select “Modules”.
3.  Select “EPS”.
•  When using the PDS (Pocket PC)
1.  Select “Module Tests”.
2.  Select “EPS”.
3.  Select “Self Test”.

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. (See Clearing DTCs Procedures.)


Clearing DTCs Procedures

1.  Connect the M-MDS to the DLC-2.

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2.  After the vehicle is identified, select the following items from the initialization screen of the M-MDS.

•  When using the IDS (laptop PC)
1.  Select “Self Test”.
2.  Select “Modules”.
3.  Select “EPS”.
•  When using the PDS (Pocket PC)
1.  Select “Module Tests”.
2.  Select “EPS”.
3.  Select “Self Test”.

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.  Press the retest button on the DTC screen.

8.  Verify that no DTCs are displayed.


PID/Data Monitor and Record Procedure

1.  Connect the M-MDS to the DLC-2.

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2.  After the vehicle is identified, select the following items from the initialization screen of the M-MDS.

•  When using the IDS (laptop PC)
1.  Select “DataLogger”.
2.  Select “Modules”.
3.  Select “EPS”.
•  When using the PDS (Pocket PC)
1.  Select “Module Tests”.
2.  Select “EPS”.
3.  Select “DataLogger”.

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.

Active Command Modes Procedure

1.  Connect the M-MDS to the DLC-2.

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2.  After the vehicle is identified, select the following items from the initialization screen of the M-MDS.

•  When using the IDS (laptop PC)
1.  Select “DataLogger”.
2.  Select “Modules”.
3.  Select “EPS”.
•  When using the PDS (Pocket PC)
1.  Select “Module Tests”.
2.  Select “EPS”.
3.  Select “DataLogger”.

3.  Select the active command modes from the PID table.

4.  Perform the active command modes, inspect the operations for each parts.

•  If the operation of output parts cannot be verified after the active command mode inspection is performed, this could indicate the possibility of an open or short circuit, sticking, or operation malfunction in the output parts.


DTC Table

DTC

Diagnosis system component

Page

M-MDS
C200B:1C
Torque sensor
(See DTC C200B:1C/C200B:1E.)
C200B:1E
Torque sensor
(See DTC C200B:1C/C200B:1E.)
C200B:25
Torque sensor
(See DTC C200B:25/C200B:62.)
C200B:54
EPS system (neutral position setting not performed)
(See DTC C200B:54.)
C200B:62
Torque sensor
(See DTC C200B:25/C200B:62.)
C200D:1C
Resolver sensor
(See DTC C200D:1C/C200D:62.)
C200D:62
Resolver sensor
(See DTC C200D:1C/C200D:62.)
U0001:88
CAN system communication error
(See DTC U0001:88.)
U0100:00
CAN system communication error
(See DTC U0100:00.)
U0300:00
EPS configuration
(See DTC U0300:00/U0300:85/U2100:00.)
U0300:85
EPS configuration
(See DTC U0300:00/U0300:85/U2100:00.)
U0401:00
CAN system communication error
(See DTC U0401:00.)
U2011:1C
EPS motor
(See DTC U2011:1C/U2011:19/U2011:61/U2011:62/U2011:64/U2011:72.)
U2011:19
EPS motor
(See DTC U2011:1C/U2011:19/U2011:61/U2011:62/U2011:64/U2011:72.)
U2011:61
EPS motor
(See DTC U2011:1C/U2011:19/U2011:61/U2011:62/U2011:64/U2011:72.)
U2011:62
EPS motor
(See DTC U2011:1C/U2011:19/U2011:61/U2011:62/U2011:64/U2011:72.)
U2011:64
EPS motor
(See DTC U2011:1C/U2011:19/U2011:61/U2011:62/U2011:64/U2011:72.)
U2011:72
EPS motor
(See DTC U2011:1C/U2011:19/U2011:61/U2011:62/U2011:64/U2011:72.)
U2100:00
EPS configuration
(See DTC U0300:00/U0300:85/U2100:00.)
U3000:16
EPS control module
(See DTC U3000:16/U3000:38/U3000:41/U3000:46/U3000:49/U3000:62/U3000:73/U3000:96.)
U3000:38
EPS control module
(See DTC U3000:16/U3000:38/U3000:41/U3000:46/U3000:49/U3000:62/U3000:73/U3000:96.)
U3000:41
EPS control module
(See DTC U3000:16/U3000:38/U3000:41/U3000:46/U3000:49/U3000:62/U3000:73/U3000:96.)
U3000:46
EPS control module
(See DTC U3000:16/U3000:38/U3000:41/U3000:46/U3000:49/U3000:62/U3000:73/U3000:96.)
U3000:49
EPS control module
(See DTC U3000:16/U3000:38/U3000:41/U3000:46/U3000:49/U3000:62/U3000:73/U3000:96.)
U3000:62
EPS control module
(See DTC U3000:16/U3000:38/U3000:41/U3000:46/U3000:49/U3000:62/U3000:73/U3000:96.)
U3000:73
EPS control module
(See DTC U3000:16/U3000:38/U3000:41/U3000:46/U3000:49/U3000:62/U3000:73/U3000:96.)
U3000:96
EPS control module
(See DTC U3000:16/U3000:38/U3000:41/U3000:46/U3000:49/U3000:62/U3000:73/U3000:96.)
U3000:4B
EPS control module
(See DTC U3000:4B.)
U3003:16
Battery power supply
(See DTC U3003:16/U3003:17.)
U3003:17
Battery power supply
(See DTC U3003:16/U3003:17.)


PID/DATA Monitor Table

PID name (definition)

Unit/Operation

Operation Status (Reference)

Inspection item(s)

EPS control module terminal

M-MDS display
ENG_RPM
RPM
•  Engine stopped: 0 RPM
•  Engine rotating at 3,000 RPM: 3,000 RPM
•  PCM inspection (See PCM INSPECTION [L8, LF, L5].) (See PCM INSPECTION [MZR-CD (RF Turbo)].) (See PCM INSPECTION [MZR-CD 2.2].)
—
MTR_CUR
A
•  When not steered: Near 0 A
•  Steered: Changes to positive or negative
•  EPS control module inspection (See EPS CONTROL MODULE REMOVAL/INSTALLATION.)
4A, 4B, 4C
SS_TRQ1
Nm
•  Not steered: Near 0 Nm
•  Steered left: Changes to 0 Nm—Positive
•  Steered right: Changes to 0 Nm—Negative
•  Torque sensor inspection (See TORQUE SENSOR INSPECTION.)
3A, 3C, 3D
SS_TRQ2
Nm
•  Not steered: Near 0 Nm
•  Steered left: Changes to 0 Nm—Positive
•  Steered right: Changes to 0 Nm—Negative
•  Torque sensor inspection (See TORQUE SENSOR INSPECTION.)
3A, 3C, 3D
STEER_SPD
°/s
•  Not steered: Near 0 °/s
•  Steered: Changes according to steering speed
•  Torque sensor inspection (See TORQUE SENSOR INSPECTION.)
—
VPWR
V
•  Engine stopped: Approx. 12 V
•  Idling: Approx. 14 V
•  Battery inspection (See BATTERY INSPECTION [L8, LF, L5].) (See BATTERY INSPECTION [MZR-CD (RF Turbo)].) (See BATTERY INSPECTION [MZR-CD 2.2].)
•  EPS control module inspection (See EPS CONTROL MODULE INSPECTION.)
•  Power supply circuit inspection (ignition switch, ignition relay, fuses)
1B
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 [L8, LF, L5].) (See PCM INSPECTION [MZR-CD (RF Turbo)].) (See PCM INSPECTION [MZR-CD 2.2].)
•  ABS HU/CM or DSC HU/CM inspection (See ABS HU/CM INSPECTION.) (See DSC HU/CM INSPECTION.)
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