Actron GM Code Scanner CP9001 - Manual (Page 81)

81
SYSTEM 6:
Teves Mark II (Version B)
1989 Eldorado, Reatta, Riviera, Seville, Toronado
1990 Eldorado, Reatta, Riviera, Seville, Toronado, Trofeo
Pre-Diagnostic Visual Inspection
Complete all steps before reading
trouble codes!
1) Check brake fluid level
2) Release the parking brake if it is
set
3) Check all ABS
system fuses
4) Check system
electrical connections
–Wheel speed sensor connectors.
–EBCM (Electronic Brake Control
Module)
connectors.
–System relay connectors.
–System grounds.
This completes the visual inspection.
Perform FUNCTIONAL CHECK before
reading codes!
Functional Check
1) Turn the ignition
key to the ON
position, but do
not start the
engine.
2) The anti-lock
lamp should illuminate for at least 3
seconds. If it does not, refer to the
proper diagnostic chart in the vehicle
service manual.
3) Observe the anti-lock and brake
lamps while starting the engine
(ignition key is in the cranking
O
FF
ON
position). Both the anti-lock and
brake lamps should be ON during
cranking. If they are not, refer to the
proper diagnostic chart in the
vehicle service manual.
4) When the engine starts, allow it to
run for 30 seconds, and then turn it
OFF for 10 seconds.
5) Return the ignition key to the ON
position (do not start the engine)
and wait 10 seconds. Observe the
condition of the anti-lock and brake
warning lamps:
–If the anti-lock lamp is ON, and the
brake warning lamp is OFF,
proceed to READING ABS
CODES, page 80.
–If the anti-lock lamp is OFF, and
the brake warning lamp is ON,
refer to the proper diagnostic chart
in the vehicle service manual.
–If the anti-lock lamp is ON, and the
brake warning lamp is ON, refer to
the proper diagnostic chart in the
vehicle service manual.
–If the anti-lock lamp is OFF, and
the brake warning lamp is OFF,
then this indicates normal system
operation, or an intermittent
problem. Intermittent trouble codes
may or may not be stored.