Tcs Off Indicator On With No Otc Set - GMC chervolet camaro 1999 Service Manual

Brakes Antilock Brake System 5-225
TCS Off Indicator On with No OTC Set
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Distribution
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BLK/ 451 BRN/WHT 1571
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0.35 GRY 1036
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PPL/WHT 1572
86
LT BLU 1122
Instrument
Cluster
$215
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C200D
A3
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C200D
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C4
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0.35 LT BLU
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P110
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Brake
ASROlr
(Pantlac)
TCSOff
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5215
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$110
3 BLK 451
P110
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BLK 451
451
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Circuit Description
The TCS OFF Indicator is controlled. by the EBTCM
by sending class 2 messages to the Instrument Panel
Cluster (IPC). It is turned on when the EBTCM sets
a DTC that turns on the TCS OFF indicator. It is also
turned on or off when the Traction Control Switch
is pressed. The Electronic Brake Traction Control
Module (EBTCM) supplies 12 volts to the Traction
Control Switch, when the TCS switch is depressed the
EBTCM sees the voltage go low, and that the
TCS switch state has changed. When the EBTCM
receives that a switch state has changed it turns on or
off the Traction Control and sends a message to
the IPC to turn on or off the TCS OFF indicator
depending on its previous state.
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5110 ....... -_-_-_-_ .. _
.,,. G110
421901
Diagnostic Aids
• It is very important that a thorough inspection of
the wiring and connectors be performed. Failure
to carefully and fully inspect wiring and connectors
may result in misdiagnosis, causing part
replacement with reappearance of the malfunction.
• Thoroughly inspect any circuitry that may be
causing the complaint for the following conditions:
- Backed out terminals
- Improper mating
- Broken locks
- Improperly formed or damaged terminals
- Poor terminal-to-wiring connections
- Physical damage to he wiring harness