Test A: The Message Center Is Not Operating Correctly
PINPOINT TEST A: THE MESSAGE CENTER IS NOT OPERATING CORRECTLYNormal Operation
The message center is located in the center of the instrument cluster between the tachometer and the speedometer in the vacuum fluorescent display area. The message center is integral to the instrument cluster and uses the same voltage supply as the instrument cluster. The RUN/START voltage is supplied to the instrument cluster on circuit CBP29 (WH/VT) and the keep alive B+ voltage is received on circuit SBP26 (YE/RD). The instrument cluster logic ground is through circuit GD112 (BK/GN) and the bulb ground is through circuit GD114 (BK/BU). The message center functionality is controlled through the message center switch, which is hardwired to the instrument cluster through input circuit CMC29 (GN/VT) and return circuit VMC29 (YE).
This pinpoint test is intended to diagnose the following:
- Instrument cluster
