Paccar Kenworth C500 2012, Руководство пользователя

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8-5
08/12
Section 8
Electrical
FIGURE 8-5. Instrument Cluster Components
CVSG Gauges
The right and left instrument panel gauges used with the multiplexed instrumentation are commonly referred to as Com-
mercial Vehicle Smart Gauges (CVSG). Like the central instrument cluster, the 2-inch gauges also receive input data
directly from the CECU. CVSG’s are electronic and mechanical. The electronic CVSG’s receive digital data from the CECU
via the CVSG data bus. The mechanical gauges (i.e. suspension air pressure, etc.) are driven directly from the air pres-
sure. Both types of gauges receive backlighting signals from the CECU via a 4-wire “daisy chained” jumper harness that
links one gauge to another.
When the ignition key is first turned ON, all the electronic 2-inch gauges will perform a calibration “power on self-test”.
The mechanical CVSG do not perform a power on self-test.
Power On Self-Test
• Ignition key turned ON
• The gauge pointers move from pointing at zero, counter-clockwise to their mechanical limit (approx. -5°), stay
there for one second and go back to pointing at zero
• At the same time, all LED indicators are switched on together, and then switched off together
Additional CVSG gauge information body builders should be aware of:
• The CECU sends 2-inch electronic gauges information over a data link (blue wire) between the CECU and the
gauge
• 2-inch electronic gauges get their power from the CECU
• Yellow = Power wire (9-16 volts)
• White = Ground (return) wire
Note: