GMC chevrolet camaro 2000 Service Manual page 687

5-214 Antilock Brake System
Brakes
.. The following conditions may cause an intermittent
Test Description
malfunction:
- A poor connection
The number(s) below refer to the step number(s) on (
the diagnostic table.
- Rubbed-through wire insulation
- A broken wire inside the insulation
• If an intermittent malfunction exists refer to
Inducing Intermittent Fault Conditions in Wiring
Systems for further diagnosis.
2. Checks if EBCM is receiving a Traction Control
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 Traction Control Switch is
at fault.
Traction Control System Off Indicator Always On
Step Action Value(s) Yes No
DEFINITION: TCS 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 TCS On/Off switch status, press
-
and release the TCS On/Off switch.
Does the switch status change from pressed to released
as the TCS 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 TCS 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
4
circuit to cluster.
3. Test Light ON, Check the connector for poor
-
-
connection to 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 Traction Control Switch and disconnect
the connector. Refer to
5
2. Using a scan tool in ABS/TC Data List read the
-
TCS Switch Status.
3. With the Traction Control Switch disconnected.
Does the TCS Switch status read released? Go to Step 6 Go to Step 7
Replace the Traction Control Switch. Refer to Traction Go to A
6
Control Switch 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 Traction Control Switch harness
OL (Infinite)
connector 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
(
.
.·