Engine Tier-3 710655- Ch 1 page 28 Wiring and cable duct 1 Cylinder 1–6 2 Coolant temperature sensor 3 Engine speed sensor 1 on flywheel 4 Engine speed sensor 2 on flywheel 5 Connector to control unit 6 Charge air pressure and temperature sensor 7 Oil pressure sensor Throttle position sensor A throttle position sensor need to be added to the system. The potentiometer provides the control unit with information about accelerator position. The accelerator position sensor (APS) has an integrated poten tiometer and two microswitches for throttle activation (idle safety switch) and full throttle (kick down switch).
The idle safety switch tells the control unit whether the accelerator is released or activated. This is primarily a safety feature to check that the potentiometer is working as it should. SHOP MANUAL MT26-31 - 06.2005