GMC chervolet camaro 1999 Service Manual page 605

5-130 Antilock Brake System Brakes
ABS Diagnostic System Check
Step
Action
Value(s) Yes
No
1. Reconnect all previously disconnected components.
2. Cycle the Ignition switch from the OFF to ON
position, engine OFF.
1
3. Plug a scan tool into the Diagnostic Link
-
Go to Step 3 Go to Step2
Connector (DLC),
Does the Scan Tool communicate with the
EBCM/EBTCM?
Go to No
Go to Data Link
Does the scan tool communicate with other modules on
Communication
Communications
2
the class 2 line?
-
with
System Check in
EBCMIEBTCM
Data Link
Communicatios
1. With the scan tool in ABS/TCS Special Functions run
Go to Applicable
the AUTOMATED test.
3
2. With the scan tool read ABS/TCS OTC.
--
OTC Table. Refer
Go to Step 4
to OTC List
Are there any current Diagnostic Trouble Codes?
Cycle the ignition switch from the OFF to ON position.
4
Does the ABS Indicator come On then go Off after several
-
Go to Step 6 Go to Step 5
seconds?
Go to ABS
Go to ABS
5
Does the ABS Indicator come On and stay On?
-
Indicator On No
Indicator
DTCSet
Inoperative with
NoDTCSet
Cycle the ignition switch from the OFF to ON position.
6
Does the Traction Off Indicator (car icon) come On then
-
Go to Step 8 Go to Step 7
go Off after several seconds?
Or Go to TCS
Go to TCS
Off
Off Indicator
(
Indicator On with
Inoperative with
7
Does the TCS Off Indicator or ASR Off Indicator come On
No OTC Set NoDTCSet
and stay On?
-
Or Go to OrGoto·
ASR Indicator On
ASR Indicator
with No OTC Set Inoperative with
No DTCSet
Cycle the ignition switch from the OFF to ON position.
8
Does the LOW TRAC Indicator come on then go off after
-
Go to Step 10 Go to Step 9
several seconds?
Go to Low Go to Low
9
Does the LOW TRAC Indicator come on and stay on?
-
Traction Indicator Traction Indicator
Always On Inoperative
10
Are there any history DTCs?
-
Go to Step 11 System OK
1. Refer to the appropriate OTC table for the
history OTC.
2. Read the diagnostic aids, and conditions for setting
the OTC.
Go to Applicable
11
3. Carefully drive the vehicle above 24 Km/h (15 mph)
-
OTC Table. Refer System OK
for several minutes while monitoring a scan tool for
to DTC List
ABS/TCS.
Did the history OTC set as a current OTC while the vehicle
was being driven?