Initial Inspection and Diagnostic Overview

1. Under any of the following conditions, the ATTS indicator light will come on or stay on even if the ATTS system is normal.
- The coolant temperature is 32°F (0°C) or below.
- The tires are not inflated to the specified pressure.
- The wheel sensor signal is interrupted during driving at speeds of 6 mph (10 km/h) or above due to, for example, a vehicle spin.
- The BARO, EC1, IAT, or TP sensors in the PGM-FI system are faulty.

2. ATTS does not function when the ATTS indicator light is ON.
3. When both the ATTS indicator light and the MIL are ON, troubleshoot the PGM-FI system first.
4. When both the ATTS indicator light and the ABS indicator light are ON, troubleshoot the ABS first.