Mazda CX 7. Manual - part 197

 

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Mazda CX 7. Manual - part 197

 

 

ON-BOARD DIAGNOSTIC 

04-02–3

04-02

ON-BOARD DIAGNOSIS

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On-Board Diagnostic (OBD) Test Description

• The OBD test inspects the integrity and function of the DSC and outputs the results when requested by the 

specific tests.

• On-board diagnostic test also:

— Provides a quick inspection of the DSC 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 3 tests:

— Read/clear diagnostic results, PID monitor and record and active command modes.

Read/clear diagnostic results

• This function allows you to read or clear DTCs in the DSC HU/CM memory.

PID/Data monitor and record

• This function allows you to access certain data values, input signals, calculated values, and system status 

information.

Active command modes

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

Reading DTCs Procedure

1. Connect the M-MDS to the DLC-2 connector.
2. After the vehicle is identified, select the following 

items from the initialization screen of the M-MDS.

• When using the IDS (notebook PC)

1. Select the “Toolbox” tab.
2. Select “Self Test”.
3. Select “Module”.
4. Select “ABS”.

• When using the PDS (pocket PC)

1. Select “Module Tests”.
2. Select “ABS”.
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 DSC. (See 04-02-3 ON-BOARD DIAGNOSIS.)

Clearing DTCs Procedures

1. Connect the M-MDS to the DLC-2 connector.
2. After the vehicle is identified, select the following 

items from the initialization screen of the M-MDS.

• When using the IDS (notebook PC)

1. Select the “Toolbox” tab.
2. Select “Self Test”.
3. Select “Module”.
4. Select “ABS”.

• When using the PDS (pocket PC)

1. Select “Module Tests”.
2. Select “ABS”.
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. Verify that no DTCs are displayed.

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ON-BOARD DIAGNOSTIC 

04-02–4

PID/Data Monitor and Record Procedure

1. Connect the M-MDS to the DLC-2 connector.
2. After the vehicle is identified, select the following 

items from the initialization screen of the M-MDS.

• When using the IDS (notebook PC)

1. Select the “Toolbox” tab.
2. Select “DataLogger”.
3. Select “Module”.
4. Select “ABS”.

• When using the PDS (pocket PC)

1. Select “Module Tests”.
2. Select “ABS”.
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 monitor function is used for monitoring the calculated value. Therefore, if the monitored 

value of the output parts is not within the specification, inspection of the monitored value of input parts 
corresponding to applicable output part control is necessary. In addition, because the system does not 
display output part malfunction as abnormality in the monitored value, it is necessary to inspect the output 
part individually using a active command modes function.

Active Command Modes Procedure

1. Connect the M-MDS to the DLC-2 connector.
2. After the vehicle is identified, select the following 

items from the initialization screen of the M-MDS.

• When using the IDS (notebook PC)

1. Select the “Toolbox” tab.
2. Select “DataLogger”.
3. Select “Module”.
4. Select “ABS”.

• When using the PDS (pocket PC)

1. Select “Module Tests”.
2. Select “ABS”.
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 there is no operation sound from the relay, motor, and solenoid after the active command mode 

inspection is performed, it is possible that there is an open or short circuit in the wiring harness, relay, motor 
or solenoid, or sticking and operation malfunction.

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ON-BOARD DIAGNOSTIC 

04-02–5

04-02

DTC Table

DTC

System malfunction location

Page

M-MDS

B1317

Power supply system

(See 04-02-9 DTC B1317, B1318.)

B1318

Power supply system

(See 04-02-9 DTC B1317, B1318.)

B1342

DSC HU/CM system

(See 04-02-11 DTC B1342, C1730.)

B1484

Brake switch system

(See 04-02-11 DTC B1484, C1954.)

C1095

Pump motor, motor relay system

(See 04-02-12 DTC C1095, C1096.)

C1096

Pump motor, motor relay system

(See 04-02-12 DTC C1095, C1096.)

C1141

LF ABS sensor rotor system

(See 04-02-14 DTC C1141, C1142, C1143, C1144.)

C1142

RF ABS sensor rotor system

(See 04-02-14 DTC C1141, C1142, C1143, C1144.)

C1143

LR ABS sensor rotor system

(See 04-02-14 DTC C1141, C1142, C1143, C1144.)

C1144

RR ABS sensor rotor system

(See 04-02-14 DTC C1141, C1142, C1143, C1144.)

C1145

RF ABS wheel-speed sensor (open circuit) 
system

(See 04-02-15 DTC C1145, C1155, C1165, C1175.)

C1148

RF ABS wheel-speed sensor/ABS sensor rotor 
system

(See 04-02-17 DTC C1148, C1158, C1168, C1178.)

C1155

LF ABS wheel-speed sensor (open circuit) 
system

(See 04-02-15 DTC C1145, C1155, C1165, C1175.)

C1158

LF ABS wheel-speed sensor/ABS sensor rotor 
system

(See 04-02-17 DTC C1148, C1158, C1168, C1178.)

C1165

RR ABS wheel-speed sensor (open circuit) 
system

(See 04-02-15 DTC C1145, C1155, C1165, C1175.)

C1168

RR ABS wheel-speed sensor/ABS sensor rotor 
system

(See 04-02-17 DTC C1148, C1158, C1168, C1178.)

C1175

LR ABS wheel-speed sensor (open circuit) 
system

(See 04-02-15 DTC C1145, C1155, C1165, C1175.)

C1178

LR ABS wheel-speed sensor/ABS sensor rotor 
system

(See 04-02-17 DTC C1148, C1158, C1168, C1178.)

C1186

Valve relay system

(See 04-02-19 DTC C1186, C1266.)

C1194

LF outlet solenoid valve system

(See 04-02-20 DTC C1194, C1198, C1210, C1214, C1242, 
C1246, C1250, C1254, C1400, C1410, C1957, C1958.)

C1198

LF inlet solenoid valve system

(See 04-02-20 DTC C1194, C1198, C1210, C1214, C1242, 
C1246, C1250, C1254, C1400, C1410, C1957, C1958.)

C1210

RF outlet solenoid valve system

(See 04-02-20 DTC C1194, C1198, C1210, C1214, C1242, 
C1246, C1250, C1254, C1400, C1410, C1957, C1958.)

C1214

RF inlet solenoid valve system

(See 04-02-20 DTC C1194, C1198, C1210, C1214, C1242, 
C1246, C1250, C1254, C1400, C1410, C1957, C1958.)

C1222

ABS wheel-speed sensor (slip monitor) system

(See 04-02-20 DTC C1222.)

C1233

LF ABS wheel-speed sensor (short to ground) 
system

(See 04-02-22 DTC C1233, C1234, C1235, C1236.)

C1234

RF ABS wheel-speed sensor (short to ground) 
system

(See 04-02-22 DTC C1233, C1234, C1235, C1236.)

C1235

RR ABS wheel-speed sensor (short to ground) 
system

(See 04-02-22 DTC C1233, C1234, C1235, C1236.)

C1236

LR ABS wheel-speed sensor (short to ground) 
system

(See 04-02-22 DTC C1233, C1234, C1235, C1236.)

C1242

LR outlet solenoid valve system

(See 04-02-20 DTC C1194, C1198, C1210, C1214, C1242, 
C1246, C1250, C1254, C1400, C1410, C1957, C1958.)

C1246

RR outlet solenoid valve system

(See 04-02-20 DTC C1194, C1198, C1210, C1214, C1242, 
C1246, C1250, C1254, C1400, C1410, C1957, C1958.)

C1250

LR inlet solenoid valve system

(See 04-02-20 DTC C1194, C1198, C1210, C1214, C1242, 
C1246, C1250, C1254, C1400, C1410, C1957, C1958.)

C1254

RR inlet solenoid valve system

(See 04-02-20 DTC C1194, C1198, C1210, C1214, C1242, 
C1246, C1250, C1254, C1400, C1410, C1957, C1958.)

C1266

Valve relay system

(See 04-02-19 DTC C1186, C1266.)

C1279

Combined sensor system

(See 04-02-24 DTC C1279, C1280, C1281, C1282, C1951, 
C1952, C1959, C2768.)

C1280

Combined sensor system

(See 04-02-24 DTC C1279, C1280, C1281, C1282, C1951, 
C1952, C1959, C2768.)

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ON-BOARD DIAGNOSTIC 

04-02–6

PID/DATA Monitor Table

C1281

Combined sensor system

(See 04-02-24 DTC C1279, C1280, C1281, C1282, C1951, 
C1952, C1959, C2768.)

C1282

Combined sensor system

(See 04-02-24 DTC C1279, C1280, C1281, C1282, C1951, 
C1952, C1959, C2768.)

C1288

Brake fluid pressure sensor system

(See 04-02-27 DTC C1288, C1290, C1953.)

C1290

Brake fluid pressure sensor system

(See 04-02-27 DTC C1288, C1290, C1953.)

C1295

Steering angle sensor system

(See 04-02-28 DTC C1295, C1307, C1937, C1938.)

C1306

Steering angle sensor (abnormal initialization) 
system

(See 04-02-29 DTC C1306.)

C1307

Steering angle sensor system

(See 04-02-28 DTC C1295, C1307, C1937, C1938.)

C1400

RF traction control solenoid valve system

(See 04-02-20 DTC C1194, C1198, C1210, C1214, C1242, 
C1246, C1250, C1254, C1400, C1410, C1957, C1958.)

C1410

LF traction control solenoid valve system

(See 04-02-20 DTC C1194, C1198, C1210, C1214, C1242, 
C1246, C1250, C1254, C1400, C1410, C1957, C1958.)

C1414

Incorrect DSC HU/CM installed

(See04-02-30 DTC C1414.)

C1730

DSC HU/CM system

(See 04-02-11 DTC B1342, C1730.)

C1937

Steering angle sensor system

(See 04-02-28 DTC C1295, C1307, C1937, C1938.)

C1938

Steering angle sensor system

(See 04-02-28 DTC C1295, C1307, C1937, C1938.)

C1951

Combined sensor system

(See 04-02-24 DTC C1279, C1280, C1281, C1282, C1951, 
C1952, C1959, C2768.)

C1952

Combined sensor system

(See 04-02-24 DTC C1279, C1280, C1281, C1282, C1951, 
C1952, C1959, C2768.)

C1953

Brake fluid pressure sensor system

(See 04-02-27 DTC C1288, C1290, C1953.)

C1954

Brake switch system

(See 04-02-11 DTC B1484, C1954.)

C1957

RF DSC switch solenoid valve system

(See 04-02-20 DTC C1194, C1198, C1210, C1214, C1242, 
C1246, C1250, C1254, C1400, C1410, C1957, C1958.)

C1958

LF DSC switch solenoid valve system

(See 04-02-20 DTC C1194, C1198, C1210, C1214, C1242, 
C1246, C1250, C1254, C1400, C1410, C1957, C1958.)

C1959

Combined sensor system

(See 04-02-24 DTC C1279, C1280, C1281, C1282, C1951, 
C1952, C1959, C2768.)

C1994

DSC control system

(See 04-02-30 DTC C1994.)

C2768

Combined sensor system

(See 04-02-24 DTC C1279, C1280, C1281, C1282, C1951, 
C1952, C1959, C2768.)

U0073

CAN system communication error

(See 09-02D-7 DTC TABLE[MULTIPLEX 
COMMUNICATION SYSTEM].)

U0100

Communication error to PCM

(See 09-02D-7 DTC TABLE[MULTIPLEX 
COMMUNICATION SYSTEM].)

U0101

Communication error to TCM

(See 09-02D-7 DTC TABLE[MULTIPLEX 
COMMUNICATION SYSTEM].)

U0114

Communication error to AWD CM

(See 09-02D-7 DTC TABLE[MULTIPLEX 
COMMUNICATION SYSTEM].)

U0140

Communication error to BCM

(See 09-02D-7 DTC TABLE[MULTIPLEX 
COMMUNICATION SYSTEM].)

U1900

Communication error to other module

(See 09-02D-7 DTC TABLE[MULTIPLEX 
COMMUNICATION SYSTEM].)

U2023

Abnormal message from PCM

(See 09-02D-7 DTC TABLE[MULTIPLEX 
COMMUNICATION SYSTEM].)

PID name 

(definition)

Unit/Condition

Operation condition 

(reference)

Action

DSC HU/CM 

terminal

ABS_LAMP
(ABS warning light 
driver output state)

On/Off

• ABS warning light is 

illuminated: On

• ABS warning light is not 

illuminated: Off

Inspect ABS warning light. 

— 

ABS_VOLT
(System battery 
voltage value)

V

• Ignition switch at ON: 

Approx. 12 V

• Idling: Approx. 14 V

Inspect power supply circuit.
(See 04-15-9 DSC HU/CM 
INSPECTION.)

J

DTC

System malfunction location

Page

M-MDS

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