Mazda MX-6 1998, Workshop Manual

Page: 632 / 1282

TROUBLESHOOTING
No. TROUBLESHOOTING ITEM
DESCRIPTION
7
When IG switch is turned to ON, both following lights
illuminate improperly:
• ABS warning light
• TCS OFF light
• Low battery voltage
• Poor connection or disconnection of ABS/TCS CM
connector
• Poor GND of ABS/TCS CM
• Malfunction of ABS/TCS CM
8 When IG switch is turned to ON, only TCS OFF light
illuminates.
• Malfunction of TCS OFF switch
• Short to GND in TCS OFF light harness
• Malfunction of ABS/TCS CM
• Malfunction of instrument cluster
Note
• When the engine coolant temperature is below 0 °C
{32 °F}, the TCS OFF light stays lit until the engine
warms up to normal operating temperature,
(maximum 15 min.)
If the light goes off after
warming up, the system is normal.
• The TCS OFF light illuminates at key on engine off.
(Inspect again after engine is started.)
9 TCS indicator light flashes when TCS is not activated
during driving.
• Improper tire size or pressure
• Malfunction of ABS wheel-speed sensor, and/or
sensor rotor
• Short to GND in TCS indicator light harness
intermittently
Note
• When TCS is activated, it is normal for the TCS
indicator light to flash and thus the system is normal.
However if this occurs frequently, inspect items
above.
• TCS activates easily when driving with different size
tires or when tire air pressure is low. When TCS is
activated, TCS will not be canceled until TCS
operation is completed even if the TCS OFF switch is
depressed.
10
When IG switch is turned to ON, only TCS OFF light
illuminates.
• Malfunction of instrument cluster
• Malfunction of ABS/TCS CM
• Short to GND in TCS indicator light harness
11 TCS indicator light and/or TCS OFF light had
illuminated in the past and they do not any more.
• Malfunction of TCS indicator light, TCS OFF light, or
TCS OFF switch harness
• Communication error between TCS CM and PCM, or
past malfunction of engine control system
Note
• When the engine coolant temperature is below 0 °C
{32 *F}, the TCS OFF light stays lit until the engine
warms up at normal operating temperature,
(maximum 15 min.)
If the light goes off after
warming up, the system is normal.
• The TCS OFF light is illuminated at key on engine
off. (Inspect again after engine is started.)
12 Insufficient TCS operation.
• Improper tire size and tire air pressure
• Malfunction of PCM
•
Malfunction of ABS/TCS system
Note
• TCS operation will be deactivated before the engine
speed is too low.
13
When IG switch is turned to ON, all following lights do
not illuminate.
• ABS warning light
• TCS indicator light
• TCS OFF light
• Burnt out bulb or short in related harness
• Poor ABS CM ground
• Malfunction of power supply circuit of ABS CM
• Malfunction of ABS CM
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