GMC chervolet camaro 1999 Service Manual page 717

5·242 Antilock Brake System Brakes
ABS Indicator Inoperative with No DTC Set
Step
Action
Value(s) Yes
No
DEFINITION: ABS indicator does not turn ON during the Instrument Panel Cluster (IPC) bulb check and no ABS!TCS
DTC(s) set.
Was the Diagnostic System Check performed?
Go to ABS
1
-
Diagnostic
Go to Step2 System Check
1.
Using a scan tool in the Instrument Panel Cluster
Special Functions.
2. Go to WOW Instrument Panel in Output Control.
2
3. In the WOW mode you can turn on or off the
-
instrument panel indicators.
All indicators will turn ON when commanded on.
Does the ABS Indicator turn on then off? Go to Step 3 Go to Step 4
Replace the EBCM/EBTCM. Refer to Electronic Brake
Go to ABS
~
Control Module (EBCM) Replacement.
-
Diagnostic
-
Is the replacement complete? System Check
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 connector for poor connection
to the cluster.
Go to ABS
4. If OK, replace the Instrument Cluster IP Cluster
Diagnostic
Replacement.
System Check
(