Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Overhead Travel Information System
The Overhead Travel Information System (OTIS) provides vehicle operator with supplementary information on a Vacuum Fluorescent (VF) display. The OTIS is located in overhead console. Vehicle operator selects and resets display functions through the use of 4 buttons (US/M, STEP, C/T and RESET). The OTIS obtains most of its information over the Programmable Communication Interface (PCI) multiplex system (bus).
The OTIS powers up when it senses battery voltage on the ignition switch input circuit. The OTIS blanks the display, then illuminates all segments of the VF display. During this time, the OTIS sends and receives information over the PCI bus to determine what to display after its 2-second initialization period. OTIS will display dashes (- - -) for any of the screens for which it did not receive PCI bus messages during the 2-second initialization period. Dashes will be replaced by valid information if and when it is received.
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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