Mazda CX 7. Manual — part 205
SYMPTOM TROUBLESHOOTING
04-03–5
04-03
4. Slightly shake each connector or wiring harness
vertically and horizontally while monitoring the
PID.
• If the PID value is unstable, inspect for poor
connection.
Inspection method for sensors
1. Connect the M-MDS to DLC-2.
2. Turn the ignition switch to the ON position (engine off).
Note
• If engine starts and runs, perform the following steps at idle.
3. Access PIDs for the switch you are inspecting.
4. Vibrate the sensor slightly with your finger.
• If the PID value is unstable or a malfunction occurs, inspect for poor connection and/or poorly mounted
sensor.
Malfunction data monitor method
1. Perform the malfunction reappearance test according to malfunction reappearance mode and malfunction data
monitor. The malfunction cause is found in the malfunction data.
Inspection method for connector terminal
1. Inspect the connection condition of each female terminal.
2. Insert the male terminal, and fit the female
terminal side to female terminal. Inspect if the
malfunction is in the female terminal.
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SYMPTOM TROUBLESHOOTING
04-03–6
SYMPTOM TROUBLESHOOTING
id040300800400
• Verify the symptoms, and perform troubleshooting according to the appropriate number.
*1
: DSC system contains traction control function; DSC indicator light illuminates and goes out while DSC is
operating.
*2
: DSC indicator light illuminates and goes out while DSC is operating.
No.
Symptom
1
Any of the following lights do not illuminate when the ignition switch is turned to the ON position.
• ABS warning light
• BRAKE system warning light
• DSC indicator light
• TCS OFF light
2
Any of the following lights remain on:
• ABS warning light.
• BRAKE system warning light
• DSC indicator light
• TCS OFF light
3
There is a malfunction in the system even though ABS warning light, BRAKE system warning light, DSC indicator
light and TCS OFF light do not illuminate.
4
ABS or TCS
*1
operates frequently.
TCS does not work correctly.
5
DSC
*2
operates frequently.
DSC does not work correctly.
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SYMPTOM TROUBLESHOOTING
04-03–7
04-03
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X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
CAN comm
unication
X
X
Troubleshooting item
Any of the following lights do not illuminate
when the ignition switch is turned to the on
position: (ABS warning light, BRAKE system
warning light, DSC indicator light and/or TCS
OFF light).
Any of the following lights remain on: (ABS
warning light, BRAKE system warning light,
DSC indicator light and/or TCS OFF light).
There is a malfunction in the system even
though ABS warning light, DSC indicator
light, and TCS OFF light do not illuminate.
ABS or TCS (*1) operates frequently. /TCS
does not work correctly.
(*1): DSC system contains traction control
function; DSC indicator light goes on and off
while DSC is operating.
DSC (*2) operates frequently. /DSC does not
work correctly.
(*2): DSC indicator light goes on and while
DSC is operating.
1
3
4
5
2
Possible factor
x: Applicable
DSC HU/CM
Instr
ument cluster
Each sensor installation
Batter
y
Charging system
Br
ak
e fluid
P
a
rking br
ak
e
Tire
Tire air pressure
Control module po
w
er supply system
Control module g
round system
Instr
ument cluster po
w
er supply system
Instr
ument cluster g
round system
Con
v
entional br
ak
e
DSC system contains traction control function; DSC indicator light illuminates and goes out while DSC is
operating.
DSC indicator light illuminates and goes out while DSC is operating.
*1:
*2:
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SYMPTOM TROUBLESHOOTING
04-03–8
NO.1 ANY OF THE FOLLOWING LIGHTS DO NOT ILLUMINATE WHEN IGNITION SWITCH TURNED TO ON
POSITION: (ABS WARNING LIGHT, BRAKE SYSTEM WARNING LIGHT, DSC INDICATOR LIGHT AND/OR
TCS OFF LIGHT)
id040300803600
Diagnostic procedure
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1
Any of the following lights do not illuminate when the ignition switch is turned to the ON position:
(ABS warning light, BRAKE system warning light, DSC indicator light and/or TCS OFF light).
[TROUBLESHOOTING HINTS]
• Inspect each light in the instrument cluster for malfunction
• Poor connection at DSC HU/CM connector
STEP
INSPECTION
ACTION
1
INSPECT FOR DTCS IN DSC HU/CM
• Inspect the DTC for the DSC ON-BOARD
DIAGNOSTIC SYSTEM.
• Have DTCs been stored in memory?
Yes
Perform the applicable DTC inspection.
(See 04-02-3 ON-BOARD DIAGNOSIS.)
No
Go to the next step.
2
INSPECT WHETHER MALFUNCTION IS IN
INSTRUMENT CLUSTER SYSTEM OR OTHER
SYSTEM
• Do other warning and indicator lights
illuminate when the ignition switch is turned
to the ON position?
Yes
Go to the next step.
No
Inspect or repair the instrument cluster (power supply
system, ground system).
3
VERIFY THAT DSC HU/CM CONNECTOR IS
CONNECTED
• Is the DSC HU/CM securely connected?
Yes
Go to the next step.
No
Connect the DSC HU/CM connector securely, then go to the
next step.
4
VERIFY THAT DSC HU/CM CONNECTOR
TERMINAL OR RELATED CONNECTOR
TERMINALS ARE CONNECTED
• Are DSC HU/CM connector terminal,
instrument cluster connector terminal, or
related connector terminals securely
connected?
Yes
Go to the next step.
No
Securely connect the DSC HU/CM connector terminal and
related connector terminals.
5
INSPECT INSTRUMENT CLUSTER
• Inspect the instrument cluster.
(See 04-02-3 ON-BOARD DIAGNOSIS.)
• If the instrument cluster normal
Yes
Replace the DCS HU/CM.
(see 04-15-6 DSC HU/CM REMOVAL/INSTALLATION.)
No
Replace the instrument cluster.
(See 04-02-3 ON-BOARD DIAGNOSIS.)
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