Actron GM Code Scanner CP9001 - Manual (Page 66)

66
Reading ABS Codes:
Bosch 2U (Version B)
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 Communication Link (ALCL)
or simply test connector.
• 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
OF
F ON
O
FF
ON
T E S T
ABS ENGINE
TM
GM 1982 & higher - CP 9001 Car Co
mpu ter Co
de Reader
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).