Actron GM Code Scanner CP9001 - Manual (Page 71)

71
Reading ABS Codes: Bosch 2U
(Version C)
IMPORTANT: Perform all steps in
PRE-DIAGNOSTIC VISUAL INSPEC-
TION and FUNCTIONAL CHECK
before reading ABS codes!
1) Take Safety Precautions
• Set parking brake, block drive
wheels.
• Put shift lever in PARK (automatic
transmission) or NEUTRAL
(manual transmission).
• Make sure ignition key is in OFF
position.
2) Have a Pencil and Paper Ready
This is for writing down all the codes.
3) 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-
nication Link (ALCL) or simply test
connector.
OF
F ON
O
FF
ON
T E S T
ABS ENGINE
TM
GM 1982 & higher - CP 9001 Car Com
puter Code Reader
• The connector is located under the
dashboard on the driver’s side.
• The connector may be in full view,
or it may be recessed behind a
panel opening.
• 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.
4) Verify Ignition
Key is OFF
5) Put the TEST switch on ABS
6) 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 computer.
Note: The Code Scanner does not
use all of the test connector
contacts. This is normal.
7) Turn Ignition
Key to ON
Position but
DO NOT START
THE ENGINE
WARNING: Stay away from the
radiator cooling fan! It may turn on.
8) Get Codes from the Flashing
“Anti-Lock” Light
• Count flashes to get trouble codes.
(Flashes begin after a few seconds.)
Code 12 looks like:
❊
PAUSE
❊❊
FLASH (pause) FLASH FLASH
(FLASH = 1, FLASH FLASH = 2.
Put 1 and 2 together = code 12.)
Code 23 looks like:
❊❊
PAUSE
❊❊❊
FLASH FLASH (pause)
FLASH FLASH FLASH
• Each code is flashed three (3) times
before the next trouble code is sent.
• After all codes are sent, the whole
sequence is repeated. This
continues until the ignition key is
turned OFF (so you can double
check your code list).