112 STARTING AND OPERATING 4. After engine start-up, check that the Oil Pressure Warning Light has turned off. S TARTING P ROCEDURE — E NGINE M ANIFOLD A IR T EMPERATURE B ELOW 0°F (-18°C) 2. Heat generated by the intake air heater dissipates rapidly in a cold engine. If more than two minutes pass between the time the “Wait to Start” telltale turns off and the engine is started, recycle the intake air heater by turning the ignition switch to the OFF position for at least five seconds and then back to the ON/ RUN position. 5. Release the parking brake and drive. NOTE:
In extremely cold weather below 0°F (-18°C) it may be beneficial to cycle the intake air heater twice before attempting to start the engine. This can be accomplished by turning the ignition to OFF position for at least five seconds and then back to the ON/RUN position after the “Wait to Start” telltale has turned off, but before the engine is started. However, excessive cycling of the intake air heater will result in damage to the heater elements or reduced battery voltage. Engine idle speed will automatically increase to 1,000 RPM and engage the Variable Geometry Turbocharger at low coolant temperatures to improve engine warm-up. 3.
If the vehicle is driven and vehicle speed exceeds 19mph (31km/h) before the intake air heater post-heat (after start) cycle is complete, the intake air heater will shut off. Automatic equipped vehicles with optional Keyless Enter ‘n Go™ – If the ENGINE START/ STOP button is pushed once while in PARK with the ignition off and driver’s foot on the brake pedal, the vehicle will automatically crank and start after the “Wait to Start” time has elapsed. If it is desired to abort the start process before it completes, the driver’s foot should be fully removed from the brake pedal prior to pushing the start button again in order for the ignition to move directly to off. 4.
If the engine is cranked for more than 10 seconds, the post-heat cycle will turn off. NOTE: If multiple pre-heat cycles are used before starting, additional engine run time may be required to maintain battery state of charge at a satisfactory level. 1. If the engine stalls after the initial start, the ignition must be turned to the OFF position for at least five seconds and then to the ON/RUN position to recycle the intake air heater. NOTE: Engine idle speed will automatically increase to 1,000 RPM and engage the Variable Geometry Turbocharger at low coolant temperatures to improve engine warm-up.
If the engine stalls, or if the ignition switch is left on for more than two minutes after the “Wait To Start” telltale goes out, reset the intake air heater by turning the ignition switch to the OFF position for at least five seconds and then back to the ON/RUN position. Repeat steps 1 through 5 of “Starting Procedure – Engine Manifold Air Temperature 0°F To 66°F (–18°C to 19°C).” When a diesel engine is allowed to run out of fuel or the fuel gels at low temperatures, air is pulled into the fuel system. If your engine has run out of fuel Ъ page345. NOTE: Excessive white smoke and poor engine perfor mance will result if intake air heater is not recycled.
If the engine stalls, or if the ignition switch is left on for more than two minutes after the “Wait to Start” telltale goes out, reset the intake air heater by turning the ignition switch to the OFF