Installation guide

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37
MBS-2 Installation
Figure 24, Flash Code Identification Table
Flash Code Fault Comments
3 Curbside front sensor signal fault. Check hubcap and sensor for proper attachment to the wheel end.
Check wiring to sensor.
4 Curbside front sensor connection fault. Check all harnesses to the sensor for damage.
5 Roadside front sensor signal fault. Check hubcap and sensor for proper attachment to the wheel end.
Check wiring to sensor.
6 Roadside front sensor connection fault. Check all harnesses to the sensor for damage.
7 Curbside rear sensor signal fault. Check hubcap and sensor for proper attachment to the wheel end.
Check wiring to sensor.
8 Curbside rear sensor connection fault. Check all harnesses to the sensor for damage.
9 Roadside rear sensor signal fault. Check hubcap and sensor for proper attachment to the wheel end.
Check wiring to sensor.
10 Roadside rear sensor connection fault. Check all harnesses to the sensor for damage.
11 Secondary PCM fault. Separate the ECM from the secondary PCM. Check that the connector
and socket are secured together properly. If the fault persists, replace
the secondary PCM.
12 Primary PCM fault. Separate the ECM from the primary PCM. Check that the connector
and socket are secured together properly. If the fault persists, replace
the primary PCM.
14 Low voltage to ABS. Check tractor and trailer wiring on auxiliary and stop lamp circuits.
Check tractor battery and charging system.
15 Electronic Control Module failure. Replace the ECM.
281UX029
NOTE: A two-sensor system does not contain 7 through 10 blink codes and a one-PCM system does not include the 11-blink code.
The primary PCM is the PCM closest to the Electronic Control Module (ECM) and the secondary PCM is the furthest from the ECM.