
3 Diagnostics, Troubleshooting and Testing
19
Meritor WABCO Maintenance Manual MM-0112 (Revised 05-13)
Figure 3.12
Blink Code Conditions
When using blink code diagnostics, the following conditions could
occur:
Table B: Blink Code Conditions
Figure 3.12
Pause
1.5 s
Pause
4 s
Pause
4 s
Light ON
Faults Cleared
Pause
4 s
Pause
4 s
Pause
4 s
Pause
4 s
Light ON
Faults Not Cleared (Active Faults Still Exist)
3 Second
Hold
3 Second
Hold
Continues
until ignition
is turned off
Note: After faults are cleared and
vehicle is started, ABS lamp will stay
on until vehicle is driven over 4 mph (6 km/h).
Continues until ignition
is turned off
(2) (2) (2) (2)
(2) (2) (2) (2)
8 Quick Blinks = Faults Cleared SYSTEM ID
SYSTEM ID SYSTEM ID SYSTEM ID SYSTEM ID
SYSTEM ID
Pause
4 s
Pause
4 s
SYSTEM ID SYSTEM ID
System Configuration Code 2: 4S/4M System
1002022a
S = Seconds
Condition Reason Action
ABS indicator lamp does not
come on at ignition.
Loose or burned-out bulb. Check bulb.
Check connections.
Make necessary repairs.
Voltage not within acceptable range
(9.5-14.0 volts) (18-32 for 24V
system).
Check connections.
Measure voltage.
Make necessary repairs.
Can’t use blink code
diagnostics. ABS indicator
lamp will not go off when
blink code is activated.
Switch not held for correct length of
time:
1 Second — Diagnostics Mode
3 Seconds — Clear All Mode
Repeat procedure, hold switch for correct length of time.
Incorrect or faulty wiring. Inspect and repair wiring.
Fault not erased from ECU after report. Repeat procedure until System O.K. code received.
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