OM3212 08/11 Operator Cab and Controls - Section 32 Page 32-15 Hazard Warning Lights Switch Hazard warning light switch (2, Figure 32-7) causes all turn signal lights to flash, simultaneously. Automatic Idle Selector Switch (AISS) AISS switch (3, Figure 32-7) controls the idle speed of the engine (released throttle pedal). With the foot-operated throttle pedal in the released position, the PMC (Powertrain Management Controller) sends a signal to the Quan- tum™ Fuel Control System for a "low idle" rpm. The rocker switch is an ON/OFF type. Depressing the bottom of the switch moves the switch to the OFF position. Depressing the top moves the switch to the ON position.
This signal may be for either: 650 rpm - normal-low idle, or 1000 rpm - high-low idle, depending on the following conditions: 1. Depressing the top of the switch selects the OFF/AUTO position which is used for enhanced truck operation. When the AISS switch is in this position, the PMC idle signal will be determined by two conditions: engine coolant temperature, and brake application. a. Engine Coolant Temperature - If the engine coolant temperature is below 30°C (47°F), the PMC will signal for 1000 rpm, regardless of other conditions. If the engine coolant temperature is above 30°C (47°F), the PMC will signal for 650 rpm, except as follows: b.
Brake Application - If both the parking brake and service brake are released (acceleration anticipated), the PMC will signal for 1000 rpm, regardless of other conditions. FIGURE 32-7. RH CONTROL/INDICATOR PANEL 1. Cold Weather (Ether) Starting Aid Switch 2. Hazard Flasher Switch 3. AISS Automatic Engine Idle System 4. A/C & Heater Vent 5. ASR Cut (Traction Control) Switch (Optional) NOTE: An amber light will illuminate the switch when the OFF/AUTO position is selected. 2. Depressing the bottom of the switch selects the ON/LOW posi- tion. When the AISS switch is in this position, the PMC will signal for 650 rpm, regardless of other conditions.
ON/LOW position is used when fine control movements are needed, such as parking in confined spaces. * If the truck is not equipped with the ASR option, the ASR slot will contain a plug. NOTE: A green light will illuminate the switch when the ON/LOW position is selected.