Actron GM Code Scanner CP9001 - Manual (Page 76)

76
SYSTEM 5:
Teves Mark II (Version A)
1989 Bonneville, Bonneville SSE, Delta 88, DeVille,
Electra, Fleetwood, 98 Regency, Park Avenue
1990 Bonneville, Bonneville SSE, Delta 88, DeVille,
Electra, Fleetwood, 98 Regency, Park Avenue
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
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 75.
–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.