Factory Databook Optional
• Idle Shutdown Timer ... ✔
• Allow Idle Shutdown
Override ... ✔
• Min. Idle Shutdown
Temperature ... ✔
• Max. Idle Shutdown
Temperature ... ✔
• A/C Switch Fan On Time ... ✔
• Fan w/Engine Retarder
in High Mode ... ✔
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Idle Shutdown Timer Description:
Description:
Description:
Description:
Description:
The Idle Shutdown Timer is designed to shut down the engine after a specified idle period. For the shutdown to occur, certain conditions must be met for the entire time-out period. These conditions include: no load on the engine, cold mode inactive and vehicle speed must be 0 (zero) mph.
If these conditions are met, then 90 seconds before the customer specified idle time is reached, the check engine light will start flashing at a rapid rate. If either the brake or clutch pedals are depressed during this final 90 seconds when the lamp is flashing, the idle shutdown timer will be disabled, if the Idle Shutdown Override parameter is programmed to Yes (see page 83). This allows the driver to override the idle shut-down timer if necessary to keep the truck idling.
If the idle shutdown timer is overridden, the ECM will log the override as a Logged Event. These Logged Events can be viewed with a service tool.
If the timer is set to 0 (zero), the Idle Shutdown feature is turned off.
If the truck/engine is wired for PTO use, the Idle Shutdown Timer will not be active when PTO mode is active. In this case PTO shutdown time would be used for the shutdown time. It is important that the engine/
truck be wired for PTO, since if it is not, the engine could shutdown after the idle shutdown time while in PTO mode
Available:
Available:
Available:
Available:
Available:
All electronically controlled on-highway engines covered in this handbook.
Range:
Range:
Range:
Range:
Range:
e g n a
R Cat
t l u a f e D m
u m i n i
M Maximum
s e t u n i M
3 1440
s e t u n i
M 0Minutes
Timer ParametersTimer ParametersTimer ParametersTimer ParametersTimer Parameters
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Advantages:
Advantages:Advantages:
Advantages:Advantages:
The idle shutdown timer has several advantages. One is that it encourages drivers to shut the engine off before leaving the truck for an extended period of time.
The other advantages include the ability to limit unnecessary idle time, save fuel and reduce engine wear.
Disadvantages:
Disadvantages:Disadvantages:
Disadvantages:Disadvantages:
When the engine shuts down as a result of the Idle Shutdown Timer the truck’s dash remains “hot”. To avoid draining the batteries the ignition key must be switched to the “off” position after the engine shuts down.
Recommendations:
Recommendations:Recommendations:
Recommendations:Recommendations:
✔ Caterpillar recommends that this parameter be set in the 3 to 5 minute range for most operation.
✔ Check with the truck manufacturer as to the availability of the optional wiring to shut the trucks electrical system off after an Idle Shutdown event.
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Allow Idle Shutdown Override Description:
Description:
Description:
Description:
Description:
The Allow Idle Shutdown Override parameter deter-mines whether the clutch or service brake can be used to override the Idle Shutdown Timer during the last 90 seconds of timing. The Idle Shutdown Timer parameter must be programmed to a value other than 0 (zero). The Allow Idle Shutdown Override parameter has three different settings.
Yes YesYes
YesYes - Allows the driver to override the Idle Shutdown Timer during the last 90 seconds of timing. (If the driver does override the timer an Idle Shutdown Override Event will be logged in the ECM memory)
No NoNo
NoNo - The driver can notnotnotnotnot override the Idle Shutdown Timer during the last 90 seconds of timing. In other words, the truck will always shutdown.
(When the engine does shutdown at the end of the Idle Shutdown Time period an Idle Shutdown Occurrence event will be logged in the ECM memory).
Outside Temperature Based Outside Temperature BasedOutside Temperature Based
Outside Temperature BasedOutside Temperature Based - If the truck has the optional Outside Air Temperature Sensor installed (see authorized Cat Dealer or truck OEM for part number) and the Minimum and Maximum Idle Shutdown Outside Temperature parameters are properly programmed (see page 85), then Idle Shutdown will be based on the Outside Air Temperature.
Available:
Available:
Available:
Available:
Available:
All electronically controlled on-highway engines covered in this handbook
Range:
Timer ParametersTimer ParametersTimer ParametersTimer ParametersTimer Parameters
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Advantages:
Advantages:Advantages:
Advantages:Advantages:
By programming the Allow Idle Shutdown Override parameter to No, it is guaranteed that the truck will shutdown at the programmed time. This can increase fuel economy and decrease engine wear.
The Outside Temperature Based setting allows the flexibility of a defined temperature range where the engine will always shutdown along with temperature ranges where the driver can override the shutdown, allowing the use of air conditioning or heating.
Disadvantages:
Disadvantages:Disadvantages:
Disadvantages:Disadvantages:
None
Recommendations:
Recommendations:Recommendations:
Recommendations:Recommendations:
✔ Caterpillar recommends setting this parameter to No for most applications when the driver is not required to sleep in the truck.
✔ Caterpillar recommends the installation of the optional temperature sensor and setting this parameter to Outside Temperature Based for applications when the driver is required to sleep in the truck. Refer to Special Instruction SEHS9920 for installation details.
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Minimum Idle Shutdown Outside Temperature Maximum Idle Shutdown Outside Temperature Description:
Description:
Description:
Description:
Description:
The Minimum and Maximum Idle Shutdown Tempera-ture settings allow the flexibility of a defined tempera-ture range where the engine will always shutdown along with temperature ranges where the driver can override the shutdown, allowing the use of air condi-tioning or heating. The Allow Idle Shutdown Override parameter must be programmed to “Outside Tempera-ture Based” for these parameters to be programmed (See page 83).
Available:
Available:
Available:
Available:
Available:
All on-highway engines covered in this handbook.
Range:
Range:
Range:
Range:
Range:
Advantages:
Advantages:
Advantages:
Advantages:
Advantages:
The Outside Temperature Based Shutdown saves fuel by allowing idle only when necessary for driver comfort.
Disadvantages:
Disadvantages:
Disadvantages:
Disadvantages:
Disadvantages:
If the Idle Shutdown time is programmed for a long time (more than an hour) and the temperature drops in to the “Always Shutdown” range the engine would shutdown and could wake the driver.
Recommendations:
Recommendations:
Recommendations:
Recommendations:
Recommendations:
✔ Program the Minimum setting to a value where it would be necessary to use the heater to be comfortable and the Maximum setting to a value where it would be necessary to use the air condi-tioner to be comfortable.
e g n a
R Cat
t l u a f e D m
u m i n i
M Maximum
F
° 0 4
-) C
° 0 4 -(
F
° 0 2 1
) C
° 9 4 (
F
° 0 2 1
) C
° 9 4 (
Timer ParametersTimer ParametersTimer ParametersTimer ParametersTimer Parameters
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A/C Pressure Switch Fan-On Time Description:
Description:Description:
Description:Description:
If the truck has a normally closed A/C High Pressure switch installed and connected to the ECM, and the ECM is wired to run the cooling fan, then the A/C Pressure Switch Fan-On Time can be programmed to prevent excessive cycling of the cooling fan clutch.
This parameter has no effect on any other Cooling Fan-On condition, only when the cooling fan is turned on by high A/C Pressure. Programming the A/C Pres-sure Switch Fan-On Time to 0 (zero) disables this feature and the ECM will not monitor this input.
Open
Closed
On
Off Low Pressure High Pressure
Refrigerant Pressure
A/C Pressure Switch Contacts
Cooling Fan
A/C Pressure Switch Fan-On Time
Available:
Available:Available:
Available:Available:
All electronically controlled on-highway engines covered in this handbook
Range:
Range:Range:
Range:Range:
Advantages:
Advantages:Advantages:
Advantages:Advantages:
The A/C Pressure Switch Fan-On Time can reduce the amount of fan cycling and increase fan clutch life.
Recommendations:
Recommendations:Recommendations:
Recommendations:Recommendations:
✔ Caterpillar recommends a setting of 60 to 120 seconds with C-135 refrigerant.
e g n a
R Cat
t l u a f e D m
u m i n i
M Maximum
s d n o c e S
0 600Seconds 0Seconds
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Fan with Engine Retarder in High Mode Description:
Description:
Description:
Description:
Description:
The Fan with Engine Retarder in High Mode parameter determines if the Cooling Fan will turn On when the Engine Retarder has been active in the High mode for at least 2 seconds (JUN95 or newer Personality Module Software, for JAN95 or earlier Personality Module Software the Engine Retarder had to be active in the High mode for 10 seconds). The truck must be wired so that the ECM is controlling the cooling fan operation and the engine must have a retarder installed for this feature to function.
Available:
Available:
Available:
Available:
Available:
All electronically controlled on-highway engines covered in this handbook
Range:
Range:
Range:
Range:
Range:
Range Yes No
Advantages:
Advantages:
Advantages:
Advantages:
Advantages:
The Cooling Fan can add additional retarding horse-power.
Disadvantages:
Disadvantages:
Disadvantages:
Disadvantages:
Disadvantages:
None
Recommendations:
Recommendations:
Recommendations:
Recommendations:
Recommendations:
✔ This programmable feature is application depen-dent and should be programmed based on cus-tomer specific requirements.
Timer ParametersTimer ParametersTimer ParametersTimer ParametersTimer Parameters
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