Mazda 6 2002, Workshop Manual

Page: 707 / 1248

TROUBLESHOOTING (ABS/TCS/DYNAMIC STABILITY CONTROL)
P–111
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
NO.6 BOTH ABS WARNING LIGHT AND BRAKE SYSTEM WARNING LIGHT STAY ON MORE THAN 4
SECONDS WITH IGNITION SWITCH ON
A6E699067650W10
Diagnostic procedure
STEP INSPECTION ACTION
6
Both ABS warning light and BRAKE system warning light stay on more than 4 seconds with ignition
switch on.
[TROUBLESHOOTING HINTS]
•
ABS/TCS HU/CM detects ABS proportioning system malfunction.
•
ABS/TCS HU/CM detects low voltage in power supply (ABS/TCS CM ingestion terminal Z voltage is below about 9
to 10 V).
•
ABS/TCS HU/CM does not operate.
•
Malfunction of communication network.
STEP INSPECTION ACTION
1 INSPECT ABS/TCS HU/CM POWER SUPPLY
FUSE
Is ABS/TCS HU/CM ignition power supply fuse
okay?
Yes Go to next step.
Check for a short to ground on blown fuse’s circuit.
No Repair or replace as necessary.
Install appropriate amperage fuse.
2 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 procedure displayed on WDS or
equivalent, go to step 8.
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.