Turn Signal Indicators

The instrument cluster outputs a reference voltage to the turn signal indicator switch. When the switch is in the central off position, the voltage flows through 3 resistors which are connected in series and back to the instrument cluster which monitors the signal and determines the turn signal indicators are off. This information is broadcast on the medium speed CAN bus to the CJB.

When the switch is operated in the LH turn signal indicator position, the reference voltage from the instrument cluster is routed via 1 of the resistors. The returned signal voltage is detected by the instrument cluster which outputs a message on the medium speed CAN bus to the CJB. The CJB activates the applicable turn signal indicators until it receives an off message from the instrument cluster.

When the switch is operated in the RH turn signal indicator position, the reference voltage from the instrument cluster is routed via 2 of the resistors. The returned signal voltage is detected by the instrument cluster which outputs a message on the medium speed CAN bus to the CJB. The CJB activates the applicable turn signal indicators until it receives an off message from the instrument cluster.