- Integrated Toolcarrier:
- IT38G Series II (S/N: CSX1-UP)
- Wheel Loader:
- 938G Series II (S/N: CRD1-UP; PHN1-UP)
- 950G Series II (S/N: BAA1-UP; AYB1-UP; AYL1-UP; AXR1-UP; AXX1-UP)
- 962G Series II (S/N: BAB1-UP; BAD1-UP; AYE1-UP; AXS1-UP; AXY1-UP)
Description of Change: New engine software is now used in order to improve sensor reliability on Wheel Loaders. This software provides new warning levels for the following:
- Low Engine Oil Pressure
- Air Filter Restriction
- Hibernate Mode
- Work Mode
- Warm Up Mode
- Low Voltage Mode
- Engine Clock
- Machine Security System Retry
The Electronic Control Module (ECM) detects an E100 if all of the following conditions are present:
- Engine Oil Pressure is in the "Low Oil Pressure Region" in Illustration 1 for 8 seconds.
- The engine has been running for at least 10 seconds.
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| Illustration 1 | g01127548 |
New Setting for E039 Low Oil Pressure Warnings:
The Electronic Control Module (ECM) detects an E039 if all of the following conditions are present:
- Engine oil pressure is in the "Low Oil Pressure Region" in Illustration 2 for 4 seconds.
- The engine has been running for at least 10 seconds.
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| Illustration 2 | g01127552 |
New Settings for E272 Air Filter Restriction:
The software will provide automatic calibration of the turbo inlet pressure sensor to atmospheric sensor in order to reduce errors in the air filter restriction measurement.
The Electronic Control Module (ECM) detects an E272 if the following condition is present:
- The inlet air restriction reaches 7.5 kPa for longer than 4 seconds.
If any diagnostics are present after programming the software the calibration will need to be completed.
Hibernate Mode:
The hibernation mode is designed to provide lower fuel consumption, reduced sound and reduced emission levels. This is especially effective in applications where machines have high idle time. Fuel consumption savings will vary by machine model and work applications.
The hibernate mode is engaged when the following conditions are met:
- The transmission is in neutral.
- The park brake is set.
- The throttle pedal is depressed 5% or less.
- The fan current is greater than 0.8 Amps.
- 10 seconds has elapsed. (This allows the engine idle speed to drop to the programmed low idle speed)
- The release of the park brake
- A directional shift of the machine
- A push of the governor pedal
Work Mode:
The work mode is designed to allow flexibility in order to set the working engine idle speed to the customer's applications requirements. The factory default work mode idle speed is 825 RPM for the IT38GII, 938GII, 950GII and 962GII.
In Cat ET the programmable range for the working engine idle speed ranges from 650 RPM to 1000 RPM. This setting is found in the engine configuration screen. The setting is adjusted through the "Low Idle-Hibernate" parameter.
Warm Up Mode:
The warm up mode is designed to keep the engine and machine warmer in cold weather operations. The warm up mode will not become active until the transmission is in neutral, the park brake is set and the throttle pedal is depressed 5% or less. Once these conditions are met and 10 minutes has elapsed, the engine software will monitor coolant and inlet manifold temperature.
When the coolant temperature drops below 70° C and the inlet manifold temperature drops below 5° C, the engine idle speed will increase to 1100 RPM. This will generate additional engine heat. The machine will come out of warm up mode once the coolant temperature reaches 80° C or the inlet manifold temperature reaches 15° C. The machine can be automatically reset to working idle speed with one of the following actions:
- The release of the park brake
- A directional shift of the machine
- A push of the governor pedal
The factory default for the IT38GII and the 938GII will have warm up mode disabled. This feature can be enabled or disabled with Cat ET in the engine configuration screen by changing the "Cold Eng Elev Idle" parameter. Until updates are made to Cat ET, codes will be needed in order to enable or disable this feature: enable (3072) disable (3328).
The factory default for the 950GII and the 962GII will have warm up mode enabled. This feature can be enabled or disabled with Cat ET in the engine configuration screen by changing the "Cold Elev Enb" parameter. Until updates are made to Cat ET, codes will be needed in order to enable or disable this feature: enable (3072) disable (3328).
Low Voltage Mode:
The low voltage mode is designed to reduce the risk of having batteries fully discharge. This feature is standard on all machines with EIMS software. This feature will become active in applications where electrical current drain is high due to extremely high electrical loads from attachments.
The low voltage mode will not become active until the transmission is in neutral, the park brake is set, the throttle pedal is depressed 5% or less and 5 minutes has elapsed. When these conditions are met the engine software will monitor battery voltage. When the battery voltage drops below 24.5 volts the engine speed will ramp up to 1100 RPM in order to charge the battery.
The machine can be automatically reset to working idle speed with one of the following actions:
- The release of the park brake
- A directional shift of the machine
- A push of the governor pedal
Engine Clock:
The engine clock will now only accumulate hours when the engine is running.
Machine Security System (MSS):
If the machine is equipped with MSS the machine will start up on the first turn of the key switch if MSS is enabled and a properly programmed MSS key is used. Previously there may have been cases where data communications were interrupted. In some cases this interruption would require the operator to retry the key switch in order to start the machine.
Adaptable To: The new 237-8294 Engine Ratings Electronic Software replaces 236-6974 Engine Ratings Electronic Software on the 938GII. The new 237-8295 Engine Ratings Electronic Software replaces 236-9944 Engine Ratings Electronic Software on the 950GII. The new 237-8296 Engine Ratings Electronic Software replaces 236-9945 Engine Ratings Electronic Software on the 962GII.
This change is effective with the serial numbers that are found in Table1.
| Sales Model | Serial Number |
|---|---|
| IT38G Series II | S/N: CSX 00688-UP |
| 938G Series II | S/N: CRD 01295-UP |
| S/N: PHN 01418-UP | |
| 950G Series II | S/N: AXR 00319-UP |
| S/N: AXX 01152-UP | |
| S/N: AYB 00921-UP | |
| S/N: AYL 01860-UP | |
| 962G Series II | S/N: AXS 00379-UP |
| S/N: AXY 00374-UP | |
| S/N: AYE 00628-UP | |
| S/N: BAB 00628-UP |