Dynamic Digital Inputs
DISTANCE SIGNAL- This input is supplied to the cluster by the DSC control module as a square wave signal. Pulses from the wheel speed sensors are processed by the DSC module to produce this signal.
The cluster electronics process the input for the cluster display and pass the signal along, on the I & K busses, as speed signal "A" for other control modules requiring the vehicle speed signal.
CAN BUS SIGNALING - The CAN bus connection to the instrument cluster is found at pins 8, 9 and 10 of the blue 26 pin Elo connector on the back.
The signals transmitted from over the CAN bus to the instrument cluster include:
- Engine temperature
- Engine RPM
- Ti signal (fuel economy indicator)
- Check engine lamp activation
- Transmission range selector position and driving program.
A malfunction with the interface to the instrument cluster could cause the DSC and transmission fail-safe indicators to appear. In addition, the instruments affected by the signals listed above will be inoperative.
DIMMER SIGNAL - This is a pulse-width modulated signal from the LCM. It is used to control the intensity of the back lighting of the instruments and the LCDs when the lights are switched ON. This signal is also output over the "K" Bus.