Operator Cab and Controls - Section 32 3/10 OM3216 Page 32-14 ASR Cut Switch ASR (Automatic Spin Regulator) cut switch (3, Figure 32-9) is used to activate or de-activate the trac- tion control system. Starting fluid is extremely volatile and flammable! Use with extreme care. If the truck is equipped with an engine starting aid for cold weather starting, and ambient temperature is below -5°C (23°F), push the engine starting aid switch in for three seconds, then release. Turn the key switch to the START position. If the engine does not start, wait at least 15 seconds before repeating. The rocker switch is an ON/OFF type switch. Depressing the bottom turns the ASR system on.
A green light will illuminate the switch to notify the operator that ASR is active. Depressing the top of the switch turns the ASR system off. An amber light will illuminate the switch notifying the operator that traction control is inactive. When ASR is active, the system monitors individual wheel speeds. If it determines one of the rear wheels is slipping during acceleration, the brake is applied to the rear wheel with the higher speed. Refer to Auto- matic Spin Regulator later in this chapter for more information on using this function. Do not crank an electric cranking motor for more than 30 seconds.
Allow two minutes for the cranking motor to cool before attempting to start the engine again. Severe damage to the cranking motor may result from overheating. ARSC Switch ARSC (Automatic Retard Speed Control) switch (4, Figure 32-9) is used to enable and disable the automatic retard speed control system. Press the top of the switch to enable automatic retard. Press the bottom of the switch to disable the automatic retard system. Refer to Auto- matic Retard Speed Control later in this section for more information on this system. Ether Starting Aid Switch Ether starting aid switch (2, Figure 32-9) is an ON/OFF type rocker switch that is spring-loaded to the OFF position.
This switch is optional equipment. When the outside temperature is below -5°C (23°F), depress the top of this switch and hold for 2-3 seconds before starting the engine. The cold starting aid atomizes ether into the engine intake manifold. Refer to Key Switch - START for further details regarding the use of this switch. Automatic Idle Selector Switch (AISS) AISS switch (5, Figure 32-9) controls the idle speed of the engine. With the accelerator pedal released, the monitor panel sends a signal to the ECM for a low idle rpm. This signal may be for either: DO NOT push the ether injection switch after the engine has started. Serious damage to the engine may occur.
650 rpm - normal-low idle, or 1000 rpm - high-low idle, depending on the following conditions: