Mazda 6. Manual — part 264
P–112
TROUBLESHOOTING (ABS/TCS/DYNAMIC STABILITY CONTROL)
4
INSPECT PID/DATA IN ABS/TCS HU/CM
Inspect the following items using WDS or
equivalent PID/DATA monitor function.
• ABS_LAMP (ABS warning light)
• BRAKE_ LAMP (BRAKE system warning
light)
• ABS_VOLT (power supply voltage)
Is ABS_LAMP and BRAKE_LAMP ON after
more than 4 seconds with ignition switch on?
Yes
Go to Step 7.
No
Go to next step.
5
INSPECT ABS/TCS HU/CM IGNITION POWER
SUPPLY SYSTEM (TERMINAL Z)
Check the voltage for PID/DATA monitor
ABS_VOLT item.
Specification: about 10 V
Is voltage within specification?
Yes
Replace ABS/TCS HU/CM (open or short in ground circuit in
ABS/TCS HU/CM)
No
Go to next step.
6
INSPECT BATTERY
Is battery voltage normal?
Yes
Go to next step.
No
Inspect battery and charging system.
7
INSPECT CHARGING SYSTEM
Is battery voltage normal with electrical load (A/
C, headlight, etc.) on and engine idling?
Yes
Go to Step 7.
No
Inspect charging system (drive belt tension, generator, etc.).
*
8
INSPECT WIRING HARNESS BETWEEN ABS/
TCS HU/CM POWER SUPPLY AND ABS/TCS
HU/CM FOR CONTINUITY
Disconnect ABS/TCS HU/CM connector.
Connect the SST (49 G066 001) (vehicle
harness side only).
Is voltage approximately 12 V at SST
connector terminal Z?
Yes
Go to next step.
No
Check for connection of ABS/TCS HU/CM connector
securely.
*
9
INSPECT WIRING HARNESS BETWEEN ABS/
TCS HU/CM GROUND FOR CONTINUITY
Turn ignition switch to LOCK.
Is there continuity between SST connector
terminal AC and ground?
Yes
If a malfunction error message is displayed on WDS or
equivalent in Step 1 inspection, go to next step.
If a malfunction error message is not displayed on WDS or
equivalent in Step 1 inspection, troubleshooting is
completed.
No
Repair wiring harness between ABS/TCS HU/CM and
ground.
*
10
INSPECT WIRING HARNESS BETWEEN ABS/
TCS HU/CM AND DLC-2 (DATA LINK
CONNECTOR-2) FOR CONTINUITY
Is there continuity between SST connector
terminal X and DLC-2?
Yes
Go to next step.
No
Repair wiring harness between ABS/TCS HU/CM and
DLC-2.
11
*
INSPECT WIRING HARNESS BETWEEN
ABS/TCS HU/CM AND DLC-2 (DATA LINK
CONNECTOR-2) FOR SHORT TO BATTERY
Is voltage approximately 12 V at SST
connector terminal X?
Yes
Repair wiring harness between ABS/TCS HU/CM and
DLC-2.
No
Go to next step.
12
*
INSPECT WIRING HARNESS BETWEEN
ABS/TCS HU/CM AND DLC-2 (DATA LINK
CONNECTOR-2) FOR SHORT TO GROUND
Is there continuity between SST connector
Terminal X and DLC-2?
Yes
Repair wiring harness between ABS/TCS HU/CM and
DLC-2.
No
Replace ABS/TCS HU/CM (communication circuit
malfunction in ABS/TCS HU/CM)
STEP
INSPECTION
ACTION
TROUBLESHOOTING (ABS/TCS/DYNAMIC STABILITY CONTROL)
P–113
P
End Of Sie
NO.7 ABS WARNING LIGHT STAYS ON MORE THAN 4 SECONDS WITH IGNITION SWITCH ON
A6E699067650W11
Diagnostic procedure
STEP
INSPECTION
ACTION
7
ABS warning light stays on more than 4 seconds with ignition switch on.
[TROUBLESHOOTING HINTS]
• ABS/TCS CM detects ABS system malfunction.
STEP
INSPECTION
ACTION
1
INSPECT WIRING HARNESS BETWEEN ABS/
TCS HU/CM AND DLC-2 (DATA LINK
CONNECTOR-2) FOR CONTINUITY AND
SHORTS
Perform DTC inspection.
Is error message displayed regarding
communication between ABS/TCS HU/CM and
WDS or equivalent?
Yes
If the communication error message is displayed even after
inspecting according to procedures displayed in the WDS or
equivalent, go to Step 4.
No
Go to next step.
2
CHECK FOR DTCs IN ABS/TCS HU/CM
Have DTCs been recorded in memory?
Yes
Perform inspection using appropriate DTC.
No
Go to next step.
3
INSPECT PID/DATA IN ABS/TCS HU/CM
Inspect the following items using WDS or
equivalent PID/DATA monitor function.
• ABS_LAMP (ABS warning light)
Is ABS_LAMP ON after more than 4
seconds with ignition switch on?
Yes
Replace ABS/TCS HU/CM (open circuit or short to ground in
ABS/TCS HU/CM).
No
Inspect instrment cluster.
*
4
INSPECT WIRING HARNESS BETWEEN ABS/
TCS HU/CM AND DLC-2 (DATA LINK
CONNECTOR-2) FOR CONTINUITY
Disconnect ABS/TCS HU/CM connector.
Connect the SST ( 49 G066 001) (vehicle
harness side only).
Is there continuity between SST connector
terminal X and data link connector?
Yes
Go to next step.
No
Repair wiring harness between ABS/TCS HU/CM and data
link connector.
*
5
INSPECT WIRING HARNESS BETWEEN ABS/
TCS HU/CM AND DLC-2 (DATA LINK
CONNECTOR-2) FOR SHORT TO B+
Is voltage approximately 12V at SST connector
terminal X?
Yes
Repair wiring harness between ABS/TCS HU/CM and data
link connector.
No
Go to next step.
P–114
TROUBLESHOOTING (ABS/TCS/DYNAMIC STABILITY CONTROL)
• When performing an asterisked (*) troubleshooting inspection, shake the wiring harness and connectors while
doing the inspection to discover whether poor contact points are the cause of any intermittent malfunction. If
there is a problem, check to make sure connectors, terminals and wiring harnesses are connected correctly
and undamaged.
End Of Sie
NO.8 BRAKE SYSTEM WARNING LIGHT STAYS ON MORE THAN 4 SECONDS WITH IGNITION SWITCH ON
A6E699067650W12
Diagnostic procedure
*
6
INSPECT WIRING HARNESS BETWEEN ABS/
TCS HU/CM AND DLC-2 (DATA LINK
CONNECTOR-2) FOR SHORT TO GROUND
Is there continuity between SST connector
terminal X and ground?
Yes
Repair wiring harness between ABS/TCS HU/CM and data
link connector.
No
Replace ABS/TCS HU/CM (communication circuit
malfunction is ABS/TCS HU/CM).
STEP
INSPECTION
ACTION
8
BRAKE system warning light stays on more than 4 seconds with ignition switch on. (Parking brake
is released.)
[TROUBLESHOOTING HINTS]
• Malfunction of instrment cluster or ABS/TCS HU/CM
• Short to ground in circuit in parking brake switch and/or brake fluid level sensor
STEP
INSPECTION
ACTION
1
INSPECT BRAKE FLUID LEVEL
Is brake fluid level okay?
Yes
Go to next step.
No
Add brake fluid.
*
2
INSPECT WIRING HARNESS BETWEEN ABS/
TCS HU/CM AND DLC-2 (DATA LINK
CONNECTOR-2 ) FOR CONTINUITY AND
SHORTS
Inspect the following items using WDS or
equivalent PID/DATA monitor function.
• BRAKE_LAMP(BRAKE system warning
light)
Is error message displayed regarding
communication between ABS/TCS HU/CM and
WDS or equivalent?
Yes
If a communication error message is displayed even after
inspecting according to procedures displayed on WDS or
equivalent.
Go to next step6.
No
Go to next step.
3
CHECK FOR DTCs IN ABS/TCS HU/CM
Have DTCs been recorded in memory?
Yes
Perform inspection using appropriate DTC.
No
Go to next step.
TROUBLESHOOTING (ABS/TCS/DYNAMIC STABILITY CONTROL)
P–115
P
• When performing an asterisked (*) troubleshooting inspection, shake the wiring harness and connectors while
doing the inspection to discover whether poor contact points are the cause of any intermittent malfunction. If
there is a problem, check to make sure connectors, terminals and wiring harnesses are connected correctly
and undamaged.
End Of Sie
4
INSPECT PID/DATA IN ABS/TCS HU/CM
Inspect (BRAKE system warning light) using
WDS or equivalent PID/DATA monitor function.
Is BRAKE_LAMP on after more than 4
seconds with ignition switch on?
Yes
Connect ABS/TCS HU/CM connector terminal X securely,
then go to next step.
No
Go to step 6.
5
VERIFY WHETHER MALFUNCTION IS IN
PARKING BRAKE SWITCH OR BRAKE FLUID
LEVEL SENSOR, OR IN SOME OTHER PART
Disconnect the following in order:
1. Parking brake switch connector
2. Brake fluid level sensor connector
Does BRAKE system warning light go out with
ignition switch on?
Yes
Replace parking brake switch and/or brake fluid level sensor
(shorted on some internal part).
No
Perform the following inspections. Repair if necessary.
• Short to ground in wiring harness between instrument
cluster ( BRAKE system warning light) and parking
brake switch.
• Short to ground in wiring harness between instrument
cluster (BRAKE system warning light) and brake fluid
level sensor.
Inspect instrument cluster.
*
6
INSPECT WIRING HARNESS BETWEEN ABS/
TCS HU/CM AND DLC-2 (DATA LINK
CONNECTOR-2) FOR CONTINUITY
Disconnect ABS/TCS HU/CM connector.
Connect the SST ( 49 G066 001) (vehicle
harness side only).
Is there continuity between SST connector
terminal X and data link connector?
Yes
Go to next step.
No
Repair wiring harness between ABS/TCS HU/CM and data
link connector.
*
7
INSPECT WIRING HARNESS BETWEEN ABS/
TCS HU/CM AND DLC-2 (DATA LINK
CONNECTOR-2) FOR SHORT TO B+
Is voltage approximately 12 V at SST
connector terminal X?
Yes
Repair wiring harness between ABS/TCS HU/CM and data
link connector.
No
Go to next step.
*
8
INSPECT WIRING HARNESS BETWEEN ABS/
TCS HU/CM AND DLC-2 (DATA LINK
CONNECTOR-2) FOR SHORT TO GROUND
Is there continuity between SST connector
terminal X and ground?
Yes
Repair wiring harness between ABS/TCS HU/CM and data
link connector.
No
Replace ABS/TCS HU/CM (communication circuit
malfunction in ABS/TCS HU/CM).
STEP
INSPECTION
ACTION
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