Otc C0901 Device #2 Voltage Low - GMC chervolet camaro 1999 Service Manual

Brakes Antilock Brake System 5-223
OTC C0901 Device #2 Voltage Low
Circuit Description
l
Hot In RUN, BULB TEST And ST ARTj
r - -
T - - - - :- - - - - " Underhood
I
H9 Power I
I
2
ABS IGN Distribution
Electrlca
I MlniFuse®
Ce1110
1
Center 2
I H8 10A I
I I
..
____________ ..
0.8 PNK 739
1
.. - - - - - - - - - - - - - - - - - - ., Accelerator
I
=
1 And
Servo
I Voltage I
Control
1
1
Module
I Ground
Ground
1
(ASM)
. . . - - - - - - - - 28-:-,- - - - -55';- - . . . ,:~
0.8
BLKJWHT 151
0.8
.BLK/WHT 151
S209 a - - - - - - '
0.8
BLK/WHT
151
.j!,
G102
Diagnostic Aids
257215
This circuit monitors the voltage level available to the
ASM. If the voltage drops below 7.5 volts, full
performance of the traction control system cannot be
guaranteed.
• Thoroughly inspect the wiring and the connectors.
Conditions for Setting the DTC
DTC C0901 can set anytime the ignition is in the RUN
position and ignition voltage is less than 7.5 volts
Action Taken When the DTC Sets
• The TCS is disabled
• The traction control indicator is turned on
Conditions for Clearing the DTC
• The condition for the OTC is no longer present
and the scan tool clear OTC function is used
• 100 ignition cycles have passed with no DTCs
detected
Failure to carefully and fully inspect the wiring
and the connectors can result in misdiagnosis.
Misdiagnosis may cause replacement.of parts
without repairing the malfunction.
• Inspect for other low voltage conditions.
• Test the charging system. Refer to Charging
System Check in Engine Electrical.
• The following conditions are other possible causes
of low system voltage:
- A charging system malfunction
- Excessive parasitic drain
- A weak battery
- A faulty system ground
• If an intermittent malfunction exists, refer to
Troubleshooting Procedures Cell 4 in Electrical
Diagnosis.
Test Description
The numbers below refer to the step numbers on the
diagnostic table.
4. This step checks for a good ground.
6. This step checks for proper voltage voltage.