Engines 2.3 As soon as the engine starts, release the ignition switch allowing the engine to run at a slow idle. NOTE: Before doing these steps, do the steps in "Pre-Start." 1. Turn the ignition switch to the on position ( Fig. 4.1 ). The amber CHECK ENGINE indicator comes on for five seconds. Leave the ignition switch on until the CHECK ENGINE indicator goes out. CAUTION If the oil pressure is too low, shut down the engine immediately to prevent serious damage. If the ve- hicle is equipped with an automatic shutdown sys- tem, the engine will shut down after 30 seconds. IMPORTANT:
On vehicles equipped with an intake air preheater, the amber INTAKE HEATER indica- tor stays on for a minimum of two seconds, re- gardless of coolant temperature. Wait until the IN- TAKE HEATER indicator goes out before attempting to start the engine. 3. The engine may be operated at low load and speed once the engine oil pressure has reached 10 psi (69 kPa) and air pressure (if applicable) has reached 64 to 76 psi (441 to 524 kPa). 4. When the engine has reached the minimum operat- ing temperature of 160°F (71°C), the engine may be operated at full load. 2. Turn the ignition switch to the start position. After the engine starts, release the key. 3.
Bring the engine up to operating speed gradually as it warms up and develops stable oil pressure. Cummins NOTE: When the engine is started, it takes a short time to build up a lubricating oil film between the shafts and bearings, and between the pistons and liners. The oil pressure gauge indicates any drop in lubricating oil pressure within 15 seconds of en- gine start-up. CAUTION Never attempt to start any Cummins IS series elec- tronic engine (ISB, ISC, ISL) using ether or any other starting fluid. Serious engine damage could result. 4.4