Mazda 6 2002 - Page 672

TROUBLESHOOTING (ABS/TCS/DYNAMIC STABILITY CONTROL)
P115
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• 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 Si e
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).