No.9 Tcs Off Light Stays On More Than 4 Seconds With Ignition Switch On - Mazda 6 2002 Workshop Manual

TROUBLESHOOTING (ABS/TCS/DYNAMIC STABILITY CONTROL)

NO.9 TCS OFF LIGHT STAYS ON MORE THAN 4 SECONDS WITH IGNITION SWITCH ON

BRAKE system warning light stays on more than 4 seconds with ignition switch on. (Parking brake
9
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?
2 CHECK FOR DTCS IN ABS/TCS HU/CM
Have DTCs been recorded in memory?
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?
*
CHECK FOR SHORT TO GROUND IN ABS/
4
TCS HU/CM
Disconnect ABS/TCS HU/CM connector.
Does TCS OFF light go out with ignition switch
on?
* INSPECT TCS OFF SWITCH
5
Disconnect TCS OFF switch connector.
Is TRAC_SW ON displayed on WDS or
equivalent?
* VERIFY WHETHER MALFUNCTION IS IN
6
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?
* INSPECT WIRING HARNESS BETWEEN ABS/
7
TCS HU/CM AND DLC-2 (DATA LINK
CONNECTOR-2) FOR SHORT TO B+
Is voltage approimately 12 V at SST
connector terminal T?
*
INSPECT WIRING HARNESS BETWEEN ABS/
8
TCS HU/CM AND DLC-2 (DATA LINK
CONNECTOR-2) FOR SHORT TO GROUND
Is there continuity between SST connector
terminal T and ground?
• 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
P–116
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 net step.
Yes Perform inspection using appropriate DTC.
No Go to net step.
Yes Go to Step 5 (TCS OFF switch system malfunction).
No Go to net step.
Yes Replace ABS/TCS HU/CM (short to ground in ABS/TCS
HU/CM).
No Inspect instrument cluster.
Yes Go to net step.
No Replace TCS OFF switch (TCS will not turn off, even though
switch is OFF).
Yes Repair wiring harness between ABS/TCS HU/CM (terminal
P) and TCS OFF switch.
Yes Repair wiring harness between ABS/TCS HU/CM (terminal
P) and data link connector.
No Go to net step.
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).
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