Mazda CX 7. Manual - part 198

ON-BOARD DIAGNOSTIC 

04-02–7

04-02

BOO_ABS
(Brake pedal switch 
input)

On/Off

• Brake pedal depressed: 

On

• Brake pedal released: Off

Inspect the brake switch.
(See 04-11-9 BRAKE SWITCH 
INSPECTION.)

N

CCNTABS
(Number of continuous 
codes)

— 

Indicates number of DTC

Perform the DTC inspection.
(See 04-02-3 ON-BOARD 
DIAGNOSIS.)

— 

LAT_ACCL

G

• Vehicle stopped or driving 

at constant speed: 0 G

• Cornering to right: 

Changes 0 G— positive

• Cornering to left: Changes 

0 G— negative

Inspect the combined sensor.
(See 04-15-16 COMBINED 
SENSOR INSPECTION.)

AI

MCYLI P

Pa, psi

• Brake pedal released: 0 

Pa, 0 psi

• Brake pedal depressed: 

Changes according to the 
brake fluid pressure

Inspect the brake fluid pressure 
sensor.
(See 04-15-4 DSC SYSTEM 
INSPECTION.)

— 

PMP_MOTOR
(Pump motor output 
state)

On/Off

• Pump motor activated: On

• Pump motor not activated: 

Off

Inspect the DSC HU/CM.
(See 04-15-4 DSC SYSTEM 
INSPECTION.)

— 

RLY_PMP
(Motor relay output 
state)

On/Off

• Relay activated: On

• Relay not activated: Off

Inspect the DSC HU/CM.
(See 04-15-4 DSC SYSTEM 
INSPECTION.)

— 

RLY_VLV
 (Valve relay output 
state)

On/Off

• Valve relay is activated: On

• Valve relay is deactivated: 

Off

Inspect the DSC HU/CM.
(See 04-15-4 DSC SYSTEM 
INSPECTION.)

— 

RPM
(Engine speed signal 
input)

RPM

• Engine stopped: 0 RPM

• Engine speed at 3,000 

rpm: 3,000 RPM

Inspect the PCM.
(See 01-40-6 PCM 
INSPECTION[L3 WITH TC].)
Inspect the instrument cluster.

— 

SWA_POS

°

• Steering wheel in neutral 

position (not turned): 0

°

• Steering wheel turned to 

left: Changes 0

°— 

negative

• Steering wheel turned to 

right: Changes 0

°— 

positive

Inspect the steering angle sensor.
(See 09-40-7 STEERING ANGLE 
SENSOR INSPECTION.)

— 

TPI

%

• Closed throttle position: 

0%

• Wide open throttle: 

Changes according to 
throttle valve opening 
angle

Inspect the throttle position 
sensor.

— 

V_LF_INL
(Left front inlet solenoid 
valve output state)

On/Off

• Solenoid valve activated: 

On

• Solenoid valve not 

activated: Off

Inspect the DSC HU/CM.
(See 04-15-4 DSC SYSTEM 
INSPECTION.)

— 

V_LF_OTL
(Left front outlet 
solenoid valve output 
state)

On/Off

• Solenoid valve activated: 

On

• Solenoid valve not 

activated: Off

Inspect the DSC HU/CM.
(See 04-15-4 DSC SYSTEM 
INSPECTION.)

— 

V_LR_INL
(Left rear inlet solenoid 
valve output state)

On/Off

• Solenoid valve activated: 

On

• Solenoid valve not 

activated: Off

Inspect the DSC HU/CM.
(See 04-15-4 DSC SYSTEM 
INSPECTION.)

— 

V_LR_OTL
(Left rear outlet 
solenoid valve output 
state)

On/Off

• Solenoid valve activated: 

On

• Solenoid valve not 

activated: Off

Inspect the DSC HU/CM.
(See 04-15-4 DSC SYSTEM 
INSPECTION.)

— 

V_RF_INL
(Right front inlet 
solenoid valve output 
state)

On/Off

• Solenoid valve activated: 

On

• Solenoid valve not 

activated: Off

Inspect the DSC HU/CM.
(See 04-15-4 DSC SYSTEM 
INSPECTION.)

— 

PID name 

(definition)

Unit/Condition

Operation condition 

(reference)

Action

DSC HU/CM 

terminal

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ON-BOARD DIAGNOSTIC 

04-02–8

V_RF_OTL
(Right front outlet 
solenoid valve output 
state)

On/Off

• Solenoid valve activated: 

On

• Solenoid valve not 

activated: Off

Inspect the DSC HU/CM.
(See 04-15-4 DSC SYSTEM 
INSPECTION.)

— 

V_RR_INL
(Right rear inlet 
solenoid valve output 
state)

On/Off

• Solenoid valve activated: 

On

• Solenoid valve not 

activated: Off

Inspect the DSC HU/CM.
(See 04-15-4 DSC SYSTEM 
INSPECTION.)

— 

V_RR_OTL
(Right rear outlet 
solenoid valve output 
state)

On/Off

• Solenoid valve activated: 

On

• Solenoid valve not 

activated: Off

Inspect the DSC HU/CM.
(See 04-15-4 DSC SYSTEM 
INSPECTION.)

— 

V_STB_L
(LF stability control 
solenoid valve output 
state)

On/Off

• Solenoid valve activated: 

On

• Solenoid valve not 

activated: Off

Inspect the DSC HU/CM.
(See 04-15-4 DSC SYSTEM 
INSPECTION.)

— 

V_STB_R
(RF stability control 
solenoid valve output 
state)

On/Off

• Solenoid valve activated: 

On

• Solenoid valve not 

activated: Off

Inspect the DSC HU/CM.
(See 04-15-4 DSC SYSTEM 
INSPECTION.)

— 

V_TRC_L
(LF traction control 
solenoid valve output 
state)

On/Off

• Solenoid valve activated: 

On

• Solenoid valve not 

activated: Off

Inspect the DSC HU/CM.
(See 04-15-4 DSC SYSTEM 
INSPECTION.)

— 

V_TRC_R
(RF traction control 
solenoid valve output 
state)

On/Off

• Solenoid valve activated: 

On

• Solenoid valve not 

activated: Off

Inspect the DSC HU/CM.
(See 04-15-4 DSC SYSTEM 
INSPECTION.)

— 

WSPD_LF
(Left front ABS wheel-
speed sensor input)

KPH, MPH

• Vehicle stopped: 0 KPH, 0 

MPH

• Vehicle running: vehicle 

speed

Inspect the ABS wheel-speed 
sensor.
(See 04-15-12 FRONT ABS 
WHEEL-SPEED SENSOR 
INSPECTION.)

F, E

WSPD_LR
(Left rear ABS wheel-
speed sensor input)

KPH, MPH

• Vehicle stopped: 0 KPH, 0 

MPH

• Vehicle running: Vehicle 

speed

Inspect the ABS wheel-speed 
sensor.
(See 04-15-14 REAR ABS 
WHEEL-SPEED SENSOR 
INSPECTION[2WD].)
(See 04-15-14 REAR ABS 
WHEEL-SPEED SENSOR 
INSPECTION[AWD].)

G, H

WSPD_RF
(Right front ABS wheel-
speed sensor input)

KPH, MPH

• Vehicle stopped: 0 KPH, 0 

MPH

• Vehicle running: vehicle 

speed

Inspect the ABS wheel-speed 
sensor.
(See 04-15-12 FRONT ABS 
WHEEL-SPEED SENSOR 
INSPECTION.)

M, O

WSPD_RR
(Right rear ABS wheel-
speed sensor input)

KPH, MPH

• Vehicle stopped: 0 KPH, 0 

MPH

• Vehicle running: Vehicle 

speed

Inspect the ABS wheel-speed 
sensor.
(See 04-15-14 REAR ABS 
WHEEL-SPEED SENSOR 
INSPECTION[2WD].)
(See 04-15-14 REAR ABS 
WHEEL-SPEED SENSOR 
INSPECTION[AWD].)

I, L

YAW_RATE

°/s

• Vehicle stopped or driving 

straight: 0 

°/s

• Cornering to left: Changes 

0 

°/s— negative

• Cornering to right: 

Changes 0 

°/s— positive

Inspect the combined sensor.
(See 04-15-16 COMBINED 
SENSOR INSPECTION.)

AA

PID name 

(definition)

Unit/Condition

Operation condition 

(reference)

Action

DSC HU/CM 

terminal

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ON-BOARD DIAGNOSTIC 

04-02–9

04-02

Active Command Modes Table

End Of Sie

DTC B1317, B1318

id040200800300

Command name

Output part

Operation

Operating 

condition

LATACCEL

Combined sensor (lateral acceleration) initialization

FALSE/TRUE

Ignition switch at 

ON

PMP_MOTOR

Pump motor

On/Off

SAS_CAL

Steering angle sensor initialization

FALSE/TRUE

STAB_IND

DSC indicator light

On/Off

TRAC OFF

TCS OFF light

V_LF_INL

LF inlet solenoid valve

V_LF_OTL

LF outlet solenoid valve

V_LR_INL

LR inlet solenoid valve

V_LR_OTL

LR outlet solenoid valve

V_RF_INL

RF inlet solenoid valve

V_RF_OTL

RF outlet solenoid valve

V_RR_INL

RR inlet solenoid valve

V_RR_OTL

RR outlet solenoid valve

V_STB_L

LF stability control solenoid valve

V_STB_R

RF stability control solenoid valve

V_TRC_L

LF traction control solenoid valve

V_TRC_R

RF traction control solenoid valve

YAWRATE

Combined sensor (yaw rate) initialization

DTC

B1317, B1318

Power supply system

DETECTION 

CONDITION

• B1317

— The voltage at DSC HU/CM terminal J is 16.8 V or more.

• B1318

— The vehicle speed exceeds 6 km/h and the voltage at ABS HU/CM terminal J is less than 9.6 V

POSSIBLE 

CAUSE

• DSC 7.5A fuse malfunction

• Open circuit or short to ground in the wiring harness between the DSC HU/CM terminal J and the 

battery

• Open circuit or faulty ground in the wiring harness between the DSC HU/CM terminal D and the body 

ground

• Battery deterioration

• Generator malfunction

• Poor connection at connectors (female terminal)

BATTERY

DSC  HU/CM

IG SW

J

D

DSC 7.5A

A

B

C

D

F

I

L

O

R

U

X

E

H

Q

T

W

Z

G

J

M

P

S

V

Y

K

N

AA

AB

AC

AD

AE

AF

AG

AH

AI

AJ

AK

AL

AM

AN

AO

AP

AQ

AR

AS

AT

DSC HU/CM WIRING HARNESS-SIDE CONNECTOR

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ON-BOARD DIAGNOSTIC 

04-02–10

Diagnostic procedure

End Of Sie

STEP

INSPECTION

ACTION

1

INSPECT BATTERY VOLTAGE

• Is the battery terminal voltage normal?

Yes

Make sure that battery terminal connection is normal.
Go to the next step.

No

Charge or replace the battery, then go to Step 6.
(See 01-17-4 BATTERY RECHARGING[L3 WITH TC].)
(See 01-17-2 BATTERY REMOVAL/INSTALLATION[L3 
WITH TC].)

2

INSPECT BATTERY GRAVITY

• Is battery specific gravity as specified?

Yes

Go to the next step.

No

Replace the battery, then go to Step 6.
(See 01-17-4 GENERATOR REMOVAL/INSTALLATION[L3 
WITH TC].)

3

INSPECT CHARGING SYSTEM

• Are the generator and drive belt tensions 

normal?

Yes

Go to the next step.

No

Replace generator and/or drive belt as necessary, then go 
to Step 6.
(See 01-10-3 DRIVE BELT REMOVAL/INSTALLATION[L3 
WITH TC].)
(See 01-17-4 GENERATOR REMOVAL/INSTALLATION[L3 
WITH TC].)

4

INSPECT ABS HU/CM POWER SUPPLY FOR 
OPEN CIRCUIT

• Start the engine.

• Measure the voltage between DSC HU/CM 

terminal J and ground.

• Is the voltage approx. 10 V?

Yes

Go to the next step.

No

Repair or replace the wiring harness for open circuit 
between the DSC HU/CM and ground, then go to Step 6.

5

INSPECT DSC HU/CM GROUND FOR POOR 
GROUND OR OPEN CIRCUIT

• Turn the ignition switch off.

• Measure the resistance between ground and 

DSC HU/CM terminal D.

• Is the resistance within 0— 1 ohm?

Yes

Go to the next step.

No

If there is no continuity:

• Repair or replace the wiring harness for open circuit 

between the DSC HU/CM and ground, then go to the 
next step.

If the resistance is not within 0— 1 ohm:

• Repair or replace the wiring harness for poor ground, 

then go to the next step.

6

VERIFY TROUBLESHOOTING COMPLETED

• Make sure to reconnect all disconnected 

connectors.

• Clear the DTC from the memory.

(See 04-02-3 ON-BOARD DIAGNOSIS.)

• Start the engine and drive the vehicle at 10 

km/h {6.2 mph} or more.

• Is the same DTC present?

Yes

Replace the DSC HU/CM, then go to the next step.
(See 04-15-6 DSC HU/CM REMOVAL/INSTALLATION.)

No

Go to the next step.

7

VERIFY AFTER REPAIR PROCEDURE

• Are any other DTCs present?

Yes

Go to the applicable DTC inspection.
(See 04-02-3 ON-BOARD DIAGNOSIS.)

No

DTC troubleshooting completed.

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