Otc C0245 Wheel Speed Sensor Frequency Error - GMC chervolet camaro 1999 Service Manual

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Brakes
Antilock Brake System 5-217
OTC C0245 Wheel Speed Sensor Frequency Error
0.8
0.8YEL 873
LTBLU 830
B
A
C120
0.5
LTBLU 830
0.5YEL 873
RF Wheel Speed
Sensor
LR Wheel Speed
Sensor
RR Wheel Speed
Sensor
(ABS!fCS)
(ABS/TCS)
B A
0.5 BU< 884
882
O.SYEL
833
0.8
0.5AED 885
0.8WHT 883
LT
BLU 872
A
c
D A
B
-
C1 01 A1
81
B A C130
0.35
0.5BRN 882
RED 885
0.35
0.5 BU<
884
WHT 883
A
A
A
A15 A14 A10 A11
C200D
0.5
----------
C200A
DK
GRN 872
0.5 BU< 884
0.5 BU< 882
0.5RED 885
0.5WHT 883
0.5TAN 833
3 5
(ABS)
20 21 5
(ABSIT'CS)
22 23 1 3 C1
---------- ------~
----------
----------
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I
LF~ee1
1
RF~
1
LR=eel
1
RR~
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I Control Module
I
=
-=-
=
-=-
=r
-=-
=
-=- I (EBCM/EBTCM)
I ~
~ ~ ~
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Circuit Description
The speed sensors used on the front of this vehicle
are multiple pole and the rear uses a single pole
magnetic pickup. This sensor produces an AC signal
that the EBTCM uses the frequency from to
calculate the wheel speed.
Conditions for Setting the OTC
• The EBTCM detects a deviation between the left
and right rear wheel speeds of greater than 6km/h
(3.75 mph) at a vehicle speed of less
than 1 OOKm/h (62 mph) on vehicles equipped
with TCS.
• The EBCM/EBTCM detects a deviation between
the left and right front wheel speeds of greater
than 1 OKm/h (6.25 mph) at a vehicle speed of less
than 1 OOKm/h (62 mph).
231377
• The EBTCM detects a deviation between the left
and right rear wheel speeds of greater than 6 %
of the vehicle speed at greater than 100 km/h
(62 mph) on vehicles equipped with TCS.
• The EBCM/EBTCM detects a deviation between
the left and right front wheel speeds of greater
than 4 km/h plus 6 % of the vehicle speed
at greater than ·100 km/h (62 mph).
This OTC will set when the EBCM/EBTCM cannot
specifically identify which wheel speed sensor is
causing the malfunction. If the EBCM/EBTCM can
identify the specific wheel speed sensor causing the
malfunction, OTC C0245 will become a history
OTC, and the OTC associated with the sensor
(OTC C0036, OTC C0041, OTC C0046, OTC C0051,
or OTC C0056) will be set concurrent with OTC C0245.