GMC chevrolet camaro 2000 Service Manual page 692

)
Brakes
O
The following conditions may cause an intermittent
malfunction:
- A poor connection
. - Rubbed-through wire insulation
..: A broken wire inside the insulation
• If an intermittent malfunction exists refer to
· Inducing Intermittent Fault Con.ditions in Wiring
System for further diagnosis.
Antilock Brake System 5-219
Test Description
The number(s) below refer to the step Ti!Umber(s) on
the diagnostic table.
2. Checks if EBCM is receiving a ASR Switch
message from the switch.
3. Checks if the scan tool can turn on and off all the
indicator lamps in the instrument cluster.
5. Checks if the EBCM or ASR Switch is at fault.
Acceleration Slip Regulation Indicator Always On
Step
Action Value(s)
Yes
No
DEFINITION: ASR Off indicator is on and traction control was not turned off. There are no DTC(s) set.
Was the Diagnostic System Check performed?
Go to A
1
-
Diagnostic
System
Go to Step 2 Check-ABS
1. Turn the ignition switch to the RUN position,
engine off.
2: Using a scan tool enter TCS Data List.
.,2
3. While monitoring the ASR On/Off switch status, press
-
· and release the ASR On/Off switch.
Does the switch status change from pressed to released
as the ASR switch is pressed and released? Go to Step 3 Go to Step 5
1. Using a scan tool in the instrument Pannel Cluster
Special Function.
2.
Go to WOW Instrument Panel in Output Control.
3 3. In the WOW mode you can turn on or off the
-
instrument panel indicators.
4. All indicators will turn ON when commanded on.
Does the ASR OFF indicator turn on then off? Go to Step 9 Go to Step 4
.1.
Disconnect the instrument cluster and connect a Test
light across the appropraiate power and ground
terminals.
2. Test light OFF, repair open in power or ground circuit
4
to cluster.
3. Test light ON, check connector for poor connection to
-
-
the cluster.
Go to Step A
4. If OK, replace the instrument cluster IP Cluster
Diagnostic
Replacement.
System
Is the instrument cluster replacement complete? Check-ABS
1. Remove the ASR Switch and disconnect the
connector. Refer to Traction Control Switch
Replacement (Chevrolet).
5
2. Using a scan tool in ABS/TC Data List read the
-
TCS Switch Status.
3. With the ASR Switch disconnected.
Does the TCS switch status read released? Go to Step 6 Go to Step 7
Replace the ASR Switch. Refer to Traction Control Switch Go to A
6
Replacement (Chevrolet).
-
Diagnostic
-
Is .the replacement complete?
System
Check-ABS
1. Turn the ignition switch to the OFF position.
2. Using J 39200 DMM, measure the resistance
7
between the ASR switch harness connector
OL (Infinite)
terminal E and a known good ground.
Is the resistance within the range specified in the value(s)
column? Go to Step 9
Go to Step 8
Repair CKT 1571 for a short to ground. Refer to Wiring Go to A
8
Repairs in Wiring Systems.
-
Diagnostic
-
Is the repair complete?
System
Check-ABS
Replace the EBCM. Refer to Electronic Brake Control Go to A
9
Module (EBCM) Replacement
-
Diagnostic
-
Is the replacement complete?
System
Check-ABS