Actron GM Code Scanner CP9001 - Manual (Page 77)

77
–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.
Reading ABS Codes: Teves Mark II
(Version A)
IMPORTANT: Perform all steps in
PRE-DIAGNOSTIC VISUAL INSPEC-
TION and FUNCTIONAL CHECK
before reading ABS codes!
1) Safety First!
• Set the parking brake.
• Put shift lever in PARK (automatic
transmission) or NEUTRAL
(manual transmission).
• Block the drive wheels.
• Make sure ignition key is in OFF
position.
2) Verify Codes are Stored
• Turn the ignition key to the ON
position, but do not start the
engine.
• Wait 30 seconds.
• Observe anti-lock
light...
– Light ON:
Codes are stored. Proceed with
testing.
– Light OFF: No codes are stored.
Stop testing.
• Turn ignition key OFF.
3) Have a Pencil and Paper Ready
This is for writing down all the codes.
4) Find the Computer Test Connector
• Service manuals call this connector
the Assembly Line Diagnostic Link
(ALDL) connector. It may also be
called the Assembly Line Commu-
OF
F ON
T E S T
ABS ENGINE
TM
GM 1982 & higher - CP 9001
Car Computer Code Reader
• The connector may be in full view,
or it may be recessed behind a
panel. An opening in the panel
allows access to recessed
connectors.
• The connector
may have a
slip-on cover
labeled
“Diagnostic
Connector.” Remove cover for
testing. Replace cover after testing.
Some vehicles require this cover in
place for proper operation.
5) Verify Ignition
Key is OFF
6) Put TEST switch
on ABS
7) Plug the Code Scanner into the
test connector
• The Code Scanner only fits ONE
WAY into the test connector.
• The Code Scanner will not harm
the vehicle engine computer.
Note: The Code Scanner does not
use all of the test connector
contacts. Also, one Code Scanner
pin may plug into an empty test
connector position. This is normal.
8) Turn Ignition Key to ON Position
but DO NOT START THE ENGINE
WARNING: Stay away from the
radiator cooling fan! It may turn on.
nication Link (ALCL) or simply test
connector.
• The connector is located under the
dashboard on the driver’s side.