Mazda 6 2002 - No.9 Tcs off Light Stays on more than 4 Seconds with Ignition Switch on

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TROUBLESHOOTING (ABS/TCS/DYNAMIC STABILITY CONTROL)
NO.9 TCS OFF LIGHT STAYS ON MORE THAN 4 SECONDS WITH IGNITION SWITCH ON
A6E699067650W13
• 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
9
BRAKE system warning light stays on more than 4 seconds with ignition switch on. (Parking brake
is released.)
[TROUBLESHOOTING HINTS]
• Warning light circuit open or shorted to ground in ABS/TCS HU/CM
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 a communication error message is displayed even after
inspecting according to procedures displayed on WDS or
equivalent, go to Step 7.
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.
• TRAC_SW (TCS OFF switch)
Is TRAC_SW ON displayed on WDS or
equivalent?
Yes Go to Step 5 (TCS OFF switch system malfunction).
No Go to next step.
*
4
CHECK FOR SHORT TO GROUND IN ABS/
TCS HU/CM
Disconnect ABS/TCS HU/CM connector.
Does TCS OFF light go out with ignition switch
on?
Yes Replace ABS/TCS HU/CM (short to ground in ABS/TCS
HU/CM).
No Inspect instrument cluster.
*
5
INSPECT TCS OFF SWITCH
Disconnect TCS OFF switch connector.
Is TRAC_SW ON displayed on WDS or
equivalent?
Yes Go to next step.
No Replace TCS OFF switch (TCS will not turn off, even though
switch is OFF).
*
6
VERIFY WHETHER MALFUNCTION IS IN
WIRING HARNESS (BETWEEN ABS/TCS HU/
CM AND TCS OFF SWITCH FOR SHORT TO
GROUND) OR ABS/TCS HU/CM
Is there continuity between SST connector
terminal P and ground?
Yes Repair wiring harness between ABS/TCS HU/CM (terminal
P) and TCS OFF switch.
*
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 T?
Yes Repair wiring harness between ABS/TCS HU/CM (terminal
P) 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 T 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).