2014/03/19 Caterpillar

Motor Grader:

120MSeries 2 (S/N: M9C1-UP; M9H1-UP; R9N1-UP; R9W1-UP)

120M2 (S/N: M921-UP)

12MSeries 2 (S/N: F9B1-UP; F9M1-UP; R9P1-UP; R9S1-UP)

140MSeries 2 (S/N: M9D1-UP; R9G1-UP; M9J1-UP; R9M1-UP)

160MSeries 2 (S/N: M9E1-UP; M9K1-UP; R9L1-UP; R9T1-UP)

Service Magazine, SEPD1751, 10 March 2014, "New Software Is Now Used on Certain Series M Motor Graders". Disregard the information in the article that is listed above. Refer to the information in the following article.

Description of Change: New Software is now used on certain machines that are listed above. The new software contains improvements for the Transmission/Chassis ECM (power train), the Implement ECM (Implement system), the Steering Control ECM (Implement 2 ECM, and the Messenger.

Improvements of Power Train (Transmission Chassis ECM) Software

• Improvement to the activation logic for the CID 0096, FMI 03 (Fuel Level Sensor, Voltage above Normal) to minimize activations of the diagnostic code when the fuel level in the tank is between 3% and 4%.

• Improvement to the Autoshift control logic to minimize intermittent occurrences of a condition where the ECM does not force a downshift to third gear from seventh or eighth gear when the inching pedal is depressed and machine speed is low. This change avoids a possible engine stall condition at low speed when the inching pedal is released with the transmission in a higher gear.

• Enhancement to the Orifice Plate Installation Status configuration to enable the ECM to set default status to "Installed" when the machine is equipped with a transmission that has one of the following transmission serial number prefixes: DJZ, LSZ, TSZ, ZBE, SLZ. The configuration status cannot be changed.

• Improvement to minimize activation of the E334 - Low Autolube Pressure Event by allowing the ECM to use the programmed Autolube Pressure Configuration value as the activation threshold instead of a constant pressure threshold. The Autolube Pressure Configuration value can be changed using Caterpillar Electronic Technician (Cat ET).

• An engineering data file is now supported that will provide an inching pedal operational histogram. The histogram can be downloaded and saved using Cat ET. The data file will record when the inching pedal is partially depressed, fully depressed, or released during gear shifts. The data file will be encrypted and must be sent to Caterpillar engineering to be evaluated. When requested to download the file using Cat ET, select "Transmission Chassis ECM" > "Information" > "Data Transport". The data file will download. Select the "Save to File" button on the bottom bar. Save the file with a descriptive name that indicates that it is from the Transmission Chassis ECM and the machine it is from. Send the file as instructed to the appropriate company contact.

• Improvement to the control logic of the Auto Differential Lock feature on all wheel drive machines that tunes the feature to perform more efficiently with the AWD system.

Improvements of Steering Software (Implement 2 ECM)

• A change to the steering system event strategy. The E256 (Steering Output Detected In Wrong Direction) Event is no longer supported in the software. An E1374 (Steering Valve Spool Not Responding To Command) Event and an E1375 (Unexpected Steering Valve Spool Movement Detected) Event are now supported in the software. When activated, the new events enhance the troubleshooting by indicating whether a problem is in the steering control valve or outside of the valve.

• A "summing" strategy will now be used to help to minimize the activations of the steering system event codes. The ECM will monitor the valve spool position when the transmission is shifted out of NEUTRAL and when the machine speed is less than 9 km/h (5.6 mph). The ECM will monitor the steering cylinder positions when the machine speed is greater than 9 km/h (5.6 mph). The ECM will compare the commanded position of the spool or cylinders to the actual positions. When a degree of error occurs between the commanded and the actual position, the ECM will accumulate or sum the amount of error to determine the severity of the error. The intention is to allow the ECM to activate the appropriate steering Event code only when it is determined that the error is significant enough to cause a noticeable steering system issue.

• Enhancement to the left-hand joystick steering alignment procedure. After manually attempting to align the joystick to the front wheels without success, the ECM can automatically align the front wheels to the joystick position in order to enable steering. Sweep the joystick from the full left position to the full right position. Then sweep from full right to the full left position. Repeat the sweep from full left to the full right position. After this sequence, the ECM will automatically move the front wheels to the joystick position.

• Improvement to the activation logic for the secondary steering pump. When the engine speed decreases to less than 400 rpm or stalls, the secondary steering electric pump will be turned ON if the machine speed is greater than 4 km/h (2.5 mph). Once the machine speed is less than 4 km/h (2.5 mph) or if engine speed exceeds 750 rpm, the electric pump will be turned OFF and remain OFF until machine speed greater than 4 km/h (2.5 mph) is detected. In addition, if the steering system primary pump pressure decreases to less than 1900 kPa (276 psi) and the machine speed is greater than 1 km/h (0.6 mph), the secondary steering electric pump will be turned ON. If the machine speed is less than 1 km/h (0.6 mph) when the pump pressure drops, the secondary steering electric pump will remain OFF unless the machine speed increases past the threshold. If the secondary steering pump is activated due to low pump pressure, a key start switch move to OFF is required to turn the pump OFF.

• Improvement to the machine articulation feature that will enable the ECM to limit the maximum articulation angle electronically in order to avoid harsh contact with the mechanical stops. The ECM will limit the maximum articulation angle on all models except 24M to 19.5 degrees on either side. The ECM will limit the maximum articulation angle on the 24M to 24.5 degrees on either side. As the articulation angle approaches the electronic stop threshold, the ECM will ramp down or snub the cylinder rod movement to the stop at the maximum angle.

• Improvement to the activation logic for the CID 615 - FMI 14 (Machine Articulation Angle Sensor, Special Instruction) and the CID 2252 - MI 14 (Machine Articulation Angle Sensor 2 - Special Instruction) in order to minimize unnecessary code activations. These FMI 14 diagnostic codes can be activated when the two position sensor signals from the machine articulation sensor do not match within 3.0 degrees. The new activation logic changes the degree of signal mismatch to 4.0 degrees before the diagnostic code will be activated.

• A configuration for a proposed auto articulation feature is now displayed in the ECM configuration screen as "Automatic Articulation Installation Status". This configuration placeholder is in place for possible future use. The configuration status is not activated for current use and cannot be changed.

• An update to add support for the new generation of steering cylinders that will be installed on production machines and used a service replacement on field machines. The new steering cylinders will not require trim file downloads for operation. For field replacement, a new cylinder and an original cylinder can be installed on the same machine. The ECM will detect the cylinder type and enable the appropriate operational logic. The new generation of steering cylinders will use new cylinder position sensors. The new position sensors will provide a measurable standard PWM duty cycle signal to the ECM. The new positions sensors are not adaptable to the old style cylinders.

Improvements of Implement Software (Implement ECM)

• Improvement to the operation of the right-hand joystick Quad Rocker blade pitch control functionality. The dead band area has been increased in order to minimize possible unintended blade pitch movement when side shifting the circle.

• Improvement to support the Ripper Auto Stow feature. This feature can be configured as Installed or Not Installed using Cat ET in the Implement ECM configuration menu. When installed, the feature enables the operator to move the default Ripper Auxiliary Lever 7 to the full upper position twice in quick succession in order to move the ripper to the upper stow position automatically. This functionality only works on Auxiliary Lever 7 which is the default ripper control.

• Improvement to the operational modulation of the default Ripper Auxiliary Lever 7 for improved proportional control of the ripper movement to reduce erratic ripper movement that can occur when the machine is moving. This functionality only works on Auxiliary Lever 7 which is the default Ripper control.

• Enhancement to remove the display of the Accugrade Auto icon from the Performance Menu on the Messenger display when an Accugrade calibration is being performed.

• Improvement to the activation logic for the Accugrade related CID 2258 (Left Blade Control Mode Switch) and the CID 2259 (Right Blade Control Mode Switch) in order to minimize unnecessary activations of the diagnostic codes. The Accugrade Auto/Manual Switch de-bounce time is increased to 5.0 seconds from the previous 0.5 seconds.

• Improvement to the Cat Grade Control Increment/Decrement Switch to allow the operator to use the Messenger to increase or decrease the offset value from the default 0.1% offset value. The operator can change the value to allow for smaller or larger adjustments of the increment/decrement function. From the Messenger home screen, select "Settings" > "Implement" > "Grade Control Offset" to change the increment/decrement value.

• Enhancement for machines equipped with the Accugrade system and the Grade Control system. When the Accugrade system is in use, the Grade Control system is disabled and is not displayed on the Messenger. When the Accugrade display is switched OFF, the ECM will recognize that the system is no longer in use, enable the Grade Control system and turn ON the system features in the Messenger.

Improvements of Messenger Software

• Improvement to add support for the new E1374 (Steering Valve Spool Not Responding To Command) Event and the new E1375 (Unexpected Steering Valve Spool Movement Detected) Event.

• Removal of the E256 (Steering Output Detected In Wrong Direction) Event that is no longer supported in the software.

• Added support for the additional language Group 7 and Language Group Eight 8. The new groups allow for a realignment of the existing languages that are offered. No new languages are supported.

Adaptable To: The new software part number is listed in Table 1.

Table 1

New Software
New Part Number	Part Name	Description	Former Part Number
451-2077	Power Train Software Gp	Transmission Chassis ECM Software	443-2151
451-2069	Implement Software Gp	Implement ECM Software	443-2140
451-5511	Implement Software Gp	Implement 2 ECM Software	443-2141

The new Messenger software part number is listed in Table 2.

Table 2

New Software
Group	Part Number	Description	Language
1	446-6719	Monitor Software Gp	English, Portuguese, French, German, Dutch
2	446-6720	Monitor Software Gp	English, Portuguese, Danish, Finnish, Swedish
3	446-6721	Monitor Software Gp	English, Portuguese, Greek, Hebrew, Turkish
4	446-6722	Monitor Software Gp	English, Portuguese, Russian, Arabic
5	446-6723	Monitor Software Gp	English, Portuguese, Romanian, Slovenian, Slovakia
6	446-6724	Monitor Software Gp	English, Portuguese, Chinese
7	446-6725	Monitor Software Gp	English, Portuguese, Italian, Spanish, Norwegian
8	446-6726	Monitor Software Gp	English, Portuguese, Japanese

Note:

(A) When updating software on the M Series 2 Motor Graders, the Implement ECM (Implement), the Implement ECM 2 (steering), the Transmission/Chassis ECM (power train), and the Messenger must be updated with the latest version of software at the same time. Use the Cat ET to verify that all flash files are the latest version. Refer to the Caterpillar Service Information System.

(B) After flashing new software to an ECM or multiple ECMs, always reset the ECMs by cycling the power supply. Turn the key switch and the disconnect switch from ON position to the OFF position. Wait for 10 seconds. Then, turn the disconnect switch and the key switch to the ON position as required.

(C) The latest released Cat ET version should be used on the PC to flash the latest software. When flashing the Motor Grader ECM software, if a message is displayed when attempting to connect that begins with the phrase "Unable to find an exact match for the .....", update Cat ET to the latest released software version and try the flash again.

(D) When flashing the Messenger, if the software flash aborts and will not successfully complete, it may be necessary to reduce the data link communication load by powering down two or three ECMs that are not being flashed. This can be accomplished by removing the system power fuses for two or three of the following controls before flashing the Messenger; the Implement ECM, the Implement ECM 2, the Implement ECM 3 or the AWD ECM. Consult the machine schematic for the machine that is being flashed to determine the system power fuses that will be removed. Replace the fuses in the proper panel position once the Messenger is flashed successfully. The new software is adaptable to and is effective in production with the serial numbers that are listed in Table 3.

Table 3

New Software
Sales Model	Adaptable Serial Numbers	Effective Serial Numbers
120M 2	S/N:M921-103	S/N:M92104-UP
	S/N:M9C1-386	S/N:M9C387-UP
	S/N:M9H1-310	S/N:M9H311-UP
	S/N:R9N1-151	S/N:R9N152-UP
	S/N:R9W1-146	S/N:R9W147-UP
12M 2	S/N:F9B1-197	S/N:F9B198-UP
	S/N:F9M1-481	S/N:F9M482-UP
	S/N:R9P1-174	S/N:R9P175-UP
	S/N:R9S1-270	S/N:R9S271-UP
140M 2	S/N:M9D1-1838	S/N:M9D1839-UP
	S/N:M9J1-946	S/N:M9J947-UP
	S/N:R9G1-325	S/N:R9G326-UP
	S/N:R9M1-429	S/N:R9M430-UP
160M 2	S/N:M9E1-409	S/N:M9E410-UP
	S/N:M9K1-425	S/N:M9K426-UP
	S/N:R9L1-228	S/N:R9L229-UP
	S/N:R9T1-310	S/N:R9T311-UP