Actron GM Code Scanner CP9001 - Manual (Page 54)

54
Reading ABS Codes – Bosch 2S
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
connec-
tor the
Assem-
bly Line Diagnostic Link (ALDL)
connector. It may also be called
the Assembly Line Communication
Link (ALCL) or simply test
connector.
• The connecter 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).
OF
F
ON T E S T
ABS ENGINE
TM
GM 1982 & higher - CP 9001
Car Com
puter Code Reader