39
Diagnostics, Troubleshooting and Testing
6.5.6.2 Right Turn Signal (Operators External Light Controls SAE J1939) Messaging Input
Fig. 6.20
4016868a
This simplifi ed diagram (Figure 6.20) represents the OnSide BSD system J1939 circuit. Although they may
not be shown here, additional in-line connectors and splices may be present in the circuit depending upon
the particular vehicle and installation.
If the vehicle is set up to use the SAE J1939 operators external light controls message input, the OnSide
BSD radar sensor will monitor the SAE J1939 network for the right turn signal activation message. When
the OnSide BSD radar sensor sees the right turn signal active in the turn signal switch parameter, it will
send a message to the WABCO OnGuard display using the SAE J1939 network to indicate when the right
turn signal is activated and a moving vehicle is detected.
If the vehicle is traveling 15 mph (24.2 km/h) or greater and there is no chirp or visual warning from
the WABCO OnGuard display when the right turn signal is activated and a moving vehicle is detected
(indicated by the A-pillar OnSide BSD LED indicator), there may be an issue with the operators external
light controls SAE J1939 message or circuit. See Symptom Chart F.
