High Idle System with Switch
If your vehicle has this feature, the manual high idle switch is located in the instrument panel switchbank.
This system can be used to increase your engine idle speed whenever the following conditions are met:
| • | The brake pedal is not pressed. |
| • | The vehicle speed is below about 5 mph (8 km/h) for vehicles with diesel engines. The vehicle must not be moving and the accelerator must not be pressed for vehicles with gasoline engines. |
| • | If the vehicle has manual transmission the clutch pedal is not pressed or, if the vehicle has the automatic transmission it is in NEUTRAL (N) or PARK (P). |
The manual high idle feature is activated by pressing the switch on the instrument panel. When the switch is pressed again, or any of the previous conditions are not met, manual high idle will be deactivated.
The manual high idle has been preset at the factory. Your dealer may change the setting to fit your needs.
For vehicles with Caterpillar® diesel engines, the high idle switch can be used to set any desired high idle speed.
To set a new temporary engine idle speed do the following:
- Make sure all of the previously described conditions are met.
- Press the accelerator pedal to the desired engine speed.
- Momentarily press the manual high idle switch.
The temporary high idle speed will be set. This new high idle rpm level will be remembered by the system until either the ignition is turned to OFF or a new high idle speed is set.
Automatic High Idle System
The automatic high idle feature will engage whenever you start your vehicle and the engine is below the preset operating temperature. This will help decrease engine warm-up time.
On vehicles that have the Caterpillar® diesel engine you may have an exhaust restrictor that will operate in High Idle mode. The exhaust brake switch must be on for this feature to operate. See Diesel Engine Exhaust Brake for more information.
Idle speed will then return to normal under any of the following conditions:
| • | The engine reaches the preset operating temperature or has been operating for at least 10 minutes. |
| • | The brake pedal is pressed. |
| • | The manual transmission clutch pedal is pressed or, if the vehicle has automatic transmission, it is shifted from NEUTRAL (N) or PARK (P). |
| • | The vehicle speed exceeds about 5 mph (8 km/h). |
| • | The throttle is pressed. |
