Section 2 Safety & Compliance Figure 2-4: Aerodynamic Mirror OAT Sensor Location Coolant Sensor considerations are given in the Cooling section above The OBD/Diagnostic connector port is located below the dash to the left of the steering wheel. This connector or its location may not be changed. Vehicles using EPA 2010 compliant engines must be equipped with a Malfunction Indicator Lamp (MIL) lamp. This lamp is required to be an engine outline symbol as defined by ISO (International Standards Organiza- tion). The figure below shows the instrument cluster and MIL lamp position.
Note this lamp location is fixed with respect to the controls and its location may not be changed if you are updating the warning lamp cards. The MIL lamp will not be used with Medium Duty vehicles until 2013. 1 PTO 5 High Exhaust System Temperature (HEST) 10 Brake Fail 2 Wait to Start 6 Fasten Seat Belts 11 High Beam 3 Malfunction Indicator Lamp (MIL) 7 RH Turn Signal 12 LH Turn Signal 4 Engine Brake 8 Park Brake 13 Check Transmission 9 Multi-Function Display 14 Check Engine Light Figure 2-5: Instrument Cluster for T170/T270/T370 used with EPA2010 Emission compliant engines. The Check Engine lamp is symbol 21 and the MIL is symbol 8.
In addition to the sensors and lamps above, the emission system also depends on signals from the exhaust DPF (Diesel Particulate Filter), SCR (Selective Catalytic Reduction), and NOx sensor. Wiring between these devices, the Dosing Control Unit (DCU) and engine ECM should not be tampered with or altered in any way. 2-7 12/11