Mazda 6 2002 Workshop Manual page 667

TROUBLESHOOTING (ABS/TCS/DYNAMIC STABILITY CONTROL)
NO.5 TCS OFF LIGHT, TCS INDICATOR LIGHT DO NOT ILLUMINATE WITH IGNITION SWITCH ON
5 TCS OFF light , TCS indicator light do not illuminate with ignition switch on.
[TROUBLESHOOTING HINTS]
• Malfunction of instrument cluster or ABS/TCS HU/CM
• Improper configuration (ABS/TCS HU/CM)
Diagnostic procedure
STEP
1 INSPECT WIRING HARNESS BETWEEN ABS/
TCS HU/CM AND DLC-2 (DATA LINK
CONNECTOR-2 ) FOR CONTINUITY AND
SHORTS
Activate TRAC_OFF (TCS OFF light) using
WDS or equivalent.
Is error message displayed regarding
communication between ABS/TCS CM and
WDS or equivalent?
2 CHECK TCS OFF LIGHT BULB FOR
MALFUNCTIONS BY USING INSPECTION
FUNCTION IN ABS/TCS HU/CM
Activate TRAC_OFF (TCS OFF light) using
WDS or equivalent
Does TCS OFF light illuminate?
3 COMFIRM DTC U1900 USING WDS OR
EQUIVALENT
• Retrieve DTC from PCM, ABS/TCS and
instrument cluster.
• Is DTC U1900 retrieved?
4 COMFIRM THE FOLLOWING PIDs USING
WDS OR EQUIVALENT:
• ABS_MSG
• PCM_MSG
• Is “not present” massage displayed on WDS
or equivalent?
5 COMFIRM DTC B2477 FOR INSTRUMENT
CLUSTER USING WDS OR EQUIVALENT
• Is DTC B2477 retrieved?
* INSPECT WIRING HARNESS BETWEEN ABS/
6
TCS CM AND DLC-2 (DATA LINK
CONNECTOR-2) FOR CONTINUITY
Is there continuity between SST connector
terminal X and data link connector?
* 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 X?
8 INSPECT WIRING HARNESS BETWEEN ABS/
TCS HU/CM AND DLC-2 (DATA LINK
CONNECTOR-2) FOR SHORT TO GROUND
If there continuity between SST connector
terminal X and ground?
P–110
INSPECTION
Yes If a communication error message is displayed even after
inspecting according to procedures displayed on the WDS
or equivalent, go to Step 6.
No Go to net step.
Yes Go to net step.
No Go to net step3.
Yes Go to net step.
No Inspect instrment cluster. If OK, then go to step6.
Yes Replace instrument cluster (open circuit in instrument
cluster).
No Network communication, for related system is malfunction.
Repair or replace as neccessary.
-configure the
Yes Re
instrument cluster.
No Replace ABS/TCS HU/CM.
Yes Go to net step.
No Repair wiring harness between ABS/TCS HU/CM and data
link connector.
Yes Repair wiring harness between ABS/TCS HU/CM 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).
A6E699067650W09
ACTION