140H Motor Grader 3306 Engine 5HM00001-UP (MACHINE)(SEBP2488 - 101) - Document St...

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Shutdown SIS

Previous Screen

Product: MOTOR GRADER

Model: 140H MOTOR GRADER 5HM
Configuration: 140H Motor Grader 3306 Engine 5HM00001-UP (MACHINE)

Testing and Adjusting

TRANSMISSION ELECTRONIC CONTROL FOR COUNTERSHAFT TRANSMISSIO
Media Number -SENR9167-02 Publication Date -01/04/2006 Date Updated -21/04/2006

SENR91670002

Testing And Adjusting

Set Up Procedures

Sudden movement of the machine or release of oil under pressure can

cause injury to persons on or near the machine. To prevent possible
injury, do the procedure that follows before testing and adjusting the
transmission and power train.

1. Move the machine to a smooth horizontal location. Move away from working machines and personnel.

2. Lower all implements to the ground.

3. Put the transmission control lever in the Parking Brake ON position. Stop the engine.

4. Put blocks in front of and behind the wheels.

5. Permit only one operator on the machine. Keep all other personnel either away from the machine or in view
of the operator.

6. Make sure all hydraulic pressure is released before any fitting, hose or components is loosened, tightened,
removed, or adjusted.

Always make visual checks first. Check the operation of the machine and then check with instruments.

Introduction

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(1) Electronic Control Module.

Motor Graders with the countershaft transmission include an onboard electronic controller referred to as an
Electronic Control Module (ECM).

The ECM should improve the ability of the mechanic to determine when and where a failure has occurred. Two
methods of testing and troubleshooting the transmission system from the ECM are provided.

The first (and the recommended) method of checking system status and diagnostics is with the use of the 8T-
8697 Electronic Control Analyzer Programmer (ECAP) or an ET. Both the ECAP and the ET can also be used
to program the transmission ECM. With the use of a diagnostic tool, a variety of useful information is readily
available. Current operating information can be obtained such as: transmission output speed, gear lever position,
battery voltage, etc. Also, from the diagnostics screen, transmission diagnostic codes are available to help
identify the source of any electrical failure.

Transmission diagnostics can also be obtained from the transmission ECM without the use of ECAP or ET.
This method will provide the same diagnostic codes available from ECAP and ET. This method will not
provide current display status capability available from ECAP or ET.

Using Caterpillar Electronic Technician (ET) To Determine Service

Codes

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ET Connections

(1) Datalink service connector - at fuse panel.

(2) 7X-1570 Cable.

(3) 7X-1700 Communication Adapter (with NEXG4523 Communication Adapter Software installed).

(4) 7X-1688 Cable.

(5) IBM compatible personal computer with Caterpillar Electronic Technician software installed (see note below).

NOTE: Caterpillar Electronic Technician is a software program that runs on an IBM compatible personal
computer. To use Caterpillar Electronic Technician (ET), order ET Single Use Program License software,
JERD2124; the information and requirements sheet, JEHP1026; the RS232 connection cable, 7X-1688 and the
Data Subscription, JERD2142. The requirements and information sheet lists the hardware required and the
features of ET.

The service tool ET is not needed to determine or clear service codes, but it makes the tasks easier and faster.
ET can also display service code history information. These features make ET a useful troubleshooting tool.

ET connects to the datalink service connector which is round and has 9 contacts. The data link service
connector is located next to the key start switch. For more information, see the Electrical System Schematic in
the machine Service Manual.

To use the ET service tool, choose the MACHINE FUNCTIONS option from the main menu. The next menu is
a list of the Electronic Control Modules (ECM) installed on the machine. Choose the menu item
"Steer/Brake/Transmission". After determining the service codes with CAT ET, see the topic Troubleshooting
Detected Faults that correspond to the service codes.

Using The 8T-8697 Electronic Control Analyzer

Programmer (ECAP)

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NOTE: The preceding chart has changed from the former issue.

The ECAP can be used to: program the transmission ECM, check current machine operating status, check
abusive events and check diagnostics codes from the transmission ECM.

Prior to connecting the ECAP into the service port on the motor grader, the service equipment must be properly
configured. The following steps will configure the ECAP.

1. Install the NEXG4523 Service Program Module (computer chip) into the 7X-1700 Communication Adapter
as shown on pages two and three of SEHS9264, Using The 7X-1700 Communication Adapter Group.

2. Install the NEXG4521 Machine Functions Service Program Module (two computer chips) into the 8T-8697
Electronic Control Analyzer Programmer (ECAP) as shown in SEHS9343, Using The ECAP NEXG4521
Machine Functions Service Program Module.

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3. Connect 7X-1420 Cable between ECAP and 7X-1700 Communication Adapter as shown in SESH9343,
Using The ECAP NEXG4521 Machine Functions Service Program Module.

NOTE: Newer ECAP units with a Caterpillar part number ending in -A (i.e.. 8T8697-A) will use 7X-1851
Cable instead of 7X-1420 Cable.

4. Install 7X-1570 Cable to 7X-1700 Communications Adapter as shown on page five of SESH9343, Using The
ECAP NEXG4521 Machine Functions Service Program Module.

At this point ECAP is ready to be connected to the motor grader.

NOTE: ECAP receives operating power from the Electronic Control Module (ECM) through the 9-pin CAT
Data Link Connector.

The following procedure can be used to program the transmission ECM as well as obtain operating status and
diagnostics.

(1) Service port. (Remove the cap.)

1. Connect the 7X-1570 Cable to the service port (1) which is the 9-pin, gray plastic, Deutsch® connector
located on the front of the seat on the drivers right hand side.

2. Either start the engine or turn the Start/Stop Key Switch to the Run position.

3. At this point the first ECAP screen will appear entitled "Electronic Control Programmer Analyzer". Select
"Machine Functions" and press Return in order to direct ECAP to the next screen entitled "Machine ECM
Selection" screen.

Electronic Control Analyzer Programmer Screen

4. From the "Machine ECM Selection" screen select "Transmission Control" and press Return to obtain the
"Transmission Functions" screen. At this point the ECAP has been directed to communicate with the

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transmission ECM. See SEHS9343, Using The ECAP NEXG4521 Machine Functions Service Program
Module, for further instructions regarding Steps 3 and 4 of this procedure.

Machine ECM Selection Screen

5. Select either Item 1 to read or change parameters, Item 2 for Current Status of the transmission or Item 3 for
transmission Diagnostics and press Return.

Transmission Functions Screen

Read/Change Parameters Screen

6. If Item 1 was selected in Step 5, then the "Read/Change Parameters" screen will be displayed. From this
screen two choices are available:

Item 1 for reading or changing parameters.

Item 2 for printing parameters.

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Read/Change Parameters Screen

7. If Item 1 was selected in Step 6, then another "Read/Change Parameters" screen will be displayed. From this
screen two parameters can be programmed. "The Vehicle ID" is the first option. This input field is provided
strictly for customer use and does not have any other function.

The "Transmission Configuration Code" is the second option. This is a critical parameter without which the
machine will NOT operate (see Chart 4). The "Total Tattletale" field is not programmable. This field indicates
how many times any of the parameters in the list have been changed.

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Print All Parameters Screen

8. If Item 2 was selected in Step 6, the "Print All Parameters" screen will be displayed. The transmission
parameters will print to the local printer if connected.

Display Status - Screen 1

Display Status - Screen 2

9. If Item 2 was selected in Step 5, then Status Screen # 1 will appear. The other status screen can be obtained
by using the up and down arrows or by selecting a screen number and pressing Return. From the status screens
all of the status items listed can be observed while the machine is operating.

* Gear Lever - This is a 13 wire input which provides the shift lever position to the ECM. This shows the
position of the shift lever. Positions are Neutral, First Forward through Eighth Forward, First Reverse
through Sixth Reverse and Park.
* Modulator Supply Pressure - This shows the value of the modulation supply pressure switch as read by
the control.

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On: The directional clutches have pressure.

Off: The directional clutches so not have pressure.

* Ignition Switch - This is a single wire input that provides a battery voltage signal when turned in the
Start position.

Run: Key is in the normal run position.

Start: Key is in the crank position (only active when the operator is trying to start the machine).

* Transmission Output Speed - This is a single wire frequency input which receives a signal from a
magnetic pickup speed sensor on the transmission output. It shows revolutions per minute on the output
shaft of the transmission.
* Gear - This shows the actual gear that the transmission ECM is engaging. Most of the time it will be the
same as selected with the gear lever.
* Dual Horsepower Mode - This shows the state of the dual horsepower solenoid (also referred to as
VHP). It is engaged in Fourth through Eighth Forward and Fourth through Sixth Reverse or when the all
wheel drive system is engaged. This status is only meaningful on motor graders that are equipped with
the dual horsepower solenoid.

Normal: Solenoid is Off.

High: Solenoid is On.

* Transmission Lamp - This is used in conjunction with the diagnostic connector to visually flash light
code sequences when diagnosing transmission electrical system faults. On: Transmission lamp is
illuminated. Off: Transmission lamp is not illuminated.
* Backup Alarm - When the transmission shift lever is Moved to a Reverse speed, the ECM provides
power for the backup alarm.

On: The backup alarm is On.

Off: The backup alarm is Off.

* Battery Volt - This is a two wire input which provides 24 DCV nominal to drive the electronic circuits
within the ECM and all of the external solenoids. It indicates the voltage the control measures between
Pins J1-1 and J1-2 at the transmission ECM connector.

Display Diagnostics Screen

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Display Diagnostics Screen

10. If Item 3 was selected in Step 5, then "Display Diagnostics" screen will appear. Select either Item 1 for
Display/Clear Diagnostics or Item 2 for Display/Clear Events and press Return.

11. If Item 1 was selected, then another screen which is also entitled "Display Diagnostics" will be displayed.
Any of the diagnostic codes can be listed in this screen depending on the operating condition of the machine.

From this screen the user can find:

* The number and type of faults which have occurred

* When the particular fault first occurred
* When the fault last occurred
* Whether the fault is currently active

Faults which are not currently active may be cleared. Chart 3 provides a complete list of the Transmission
Diagnostic Codes. To clear faults, follow the steps listed:

a. Use the arrow up or down to highlight the fault to be cleared.

b. Press Return.

c. You will be asked to confirm that you really want to clear this fault. Answer Yes or No.

Active faults may not be cleared until the problem causing the fault has been corrected.

Display Events Screen

12. If Item 2 was selected in Step 10, then a screen which is entitled "Display Events" will be displayed. Either

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of the two events listed below could be displayed here:

* Coasting in Neutral warning - When the transmission control lever is in neutral with the transmission
modulator pedal released with a ground speed greater than 23 km/h (14 mph).
* Machine driven with parking brake on - When the transmission control lever is in Park with a ground
speed greater than 3 km/h (1.8 mph).

From this screen the user can find:

* The number and type of events which have occurred

* When the particular event first occurred
* When the event last occurred

To clear events, follow the steps listed:

a. Use the arrow up or down to highlight the event to be cleared.

b. Press Return.

c. You will be asked to confirm that you really want to clear this event. Answer Yes or No.

13. To remove the ECAP from use, disconnect 7X-1570 Cable from the service port.

Obtaining Transmission DiagnosticsFrom The

Transmission ECM Without The Use Of An ECAP
From the transmission ECM the diagnostic codes can be obtained and cleared (if not active) without the use of
the ECAP. The following process will entail disconnecting a transmission wiring harness and jumpering
specific wires in order to prompt the transmission ECM to display coded messages to the transmission indicator
lamp (1) on the EMS panel.

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(1) Transmission indicator lamp.

NOTICE
While using this procedure to retrieve transmission diagnostics from
the transmission ECM, the machine must be parked with parking
brake Applied.

This process is not as easy to use as the ECAP nor is the capability as complete. This capability has been
provided for the user who does not have ready access to an ECAP.

Follow the steps to obtain transmission diagnostics from the ECM.

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NOTE: The preceding chart has changed from the former issue.

(2) Diagnostic plug. (3) ECM.

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1. The transmission ECM (3) and the diagnostic plug are under the right side of the cab.

2. Locate the transmission indicator lamp (1) located in front of the steering wheel.

3. Place the Start/Stop Key Switch in the Run position with engine off. When the machine Start/Stop Key
Switch is turned to the ON position, the machine will display the Transmission Configuration Code as part of
normal operation. For example, when the Start/Stop Key of a 140H is turned to ON, a "41" code will be
displayed on the EMS transmission indicator lamp (1). The lamp will flash four times in rapid succession
followed with a one second pause followed by one additional flash.

4. To enter the Diagnostic Mode of the transmission ECM, uncouple the diagnostic plug (2). At this point the
ECM automatically defaults to the Active Diagnostic Mode. In the Active Diagnostic Mode the ECM will flash
out the first Active Fault in memory followed by a three second pause and then repeating the original fault. The
original fault will continue to be repeated until the diagnostic plug (2) is reconnected.

5. To enter the Active Diagnostic Scroll Mode, jumper sockets 1 and 2 of the diagnostic receptacle of the
diagnostic plug (2). The control will display all diagnostics that are presently active on the system. A three
second pause separates the codes as they are displayed. Removing the jumper while the control is displaying a
diagnostic code will cause the control to repeatedly display that code. Replacing the jumper resumes scrolling.

6. To enter the Logged Diagnostic Scroll Mode, jumper sockets 1 and 3 of the diagnostic receptacle. The ECM
will now display any faults which have occurred which are not presently active. A Diagnostic Code of "12"
indicates there are no Logged Faults present. Removing the jumper wire while the control is displaying a
Diagnostic Code will cause the control to repeatedly display that code. Replacing the 1 to 3 jumper resumes
scrolling.

7. This mode is used to clear Logged Diagnostics from memory. To erase a code, put the control in the Logged
Diagnostic Scroll Mode until the desired code is displayed and then remove the jumper. The ECM will continue
to display the desired code. Jumper receptacle socket 1 to 4. The transmission indicator lamp (1) will turn off
indicating the code has been erased. The lamp will remain off until either the Logged Diagnostic Scroll Mode or
the Active Diagnostic Scroll Mode is re-entered. The above process can be repeated until there are no codes
stored in memory. An active diagnostic code cannot be erased from memory.

8. Reconnect diagnostic plug (2) to the receptacle when servicing is complete. Transmission indicator lamp (1)
will stop flashing.

Programming The Transmission ECM Transmission Configuration

Code Without An ECAP

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(1) Transmission indicator lamp.

(2) Diagnostic plug. (3) ECM.

1. The transmission ECM (3) and the diagnostic plug are under the right side of the cab.

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2. Locate the transmission indicator lamp (1) located in front of the steering wheel.

3. Place the Start/Stop Key Switch in the Run position with engine off.

4. Uncouple the diagnostic plug (2).

5. Determine the right transmission configuration code from Chart 4 for the model of motor grader the control is
installed on. (For illustration purposes, assume that the model is a 140H. Therefore the transmission
configuration code would be "41".

6. Jumper Sockets 1,2 and 3 on the diagnostic receptacle. Place the transmission control lever in the Forward
gear which corresponds to the first digit of the desired transmission configuration code. For this example, place
the transmission control lever in Fourth Forward. Wait until the transmission indicator lamp (1) flashes out this
digit. Place the transmission control lever in the neutral position. Remove jumpers completely out of the
diagnostic receptacle. The first digit is programmed.

7. Jumper Sockets 1, 2 and 4 on the diagnostic receptacle. Place the transmission control lever in the Forward
gear which corresponds to the second digit of the desired transmission configuration code. For this example,
place the transmission control lever in First Forward. Wait until the transmission indicator lamp (1) flashes out
this digit. Place the transmission control lever in the neutral position. Remove jumpers completely out of the
diagnostic receptacle. The second digit is programmed.

8. Replace the diagnostic receptacle. Turn the Start/Stop Key Switch to the OFF position.

9. Turn the Start/Stop Key Switch to the ON position. Watch the transmission indicator lamp (1). Make sure
that it flashes out the desired transmission configuration code. In our example, you should see a "41" flash code
displayed on power up.

Troubleshooting
Troubleshooting Without An ECAP Or ECM Diagnostics
Operate the machine in each direction and in all speeds. Note the noises that are not normal and find their
source. If the operation is not correct, refer to the following problems and procedures.

The following procedure has been designed without the benefit of using diagnostics from the transmission
ECM. However, using an ECAP in combination with this troubleshooting guide should improve the efficiency
in resolving the problem.

Problem:

Motor Grader Will Not Key Start/Stop

Corrective Procedure:

1. Check the transmission control fuse (10 amp) located in fuse panel at the base of the steering console.
Replace if necessary.

2. Remove the transmission ECM from under the cab and disconnect the 40-pin Deutch® connectors. Measure
voltage between Pins J1-1 and J1-2.

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3. If the voltage measured in Step 2 is above 20 DCV, the transmission ECM is inoperative. If some voltage is
measured and the voltage is less the 20 DCV, the batteries are undercharged. If no voltage was measured in
Step 2, proceed to Step 4.

4. Check Pin J1-1 of the 40 pin Deutch® connector to determine the voltage between the pin and frame. If Pin
J1-1 has voltage, repair 202 Black ground wire in machine harness. If Pin J1-1 does not have voltage, repair 126
Pink wire in machine harness.

Problem:

"First Gear Out Of Neutral" Only Working Gear

Corrective Procedure:

1. Start engine and operate the machine in order to determine which gears are operable.

2. Stop the machine, engage the parking brake and turn off the engine.

3. Jumper the manual modulation pressure switch in order to determine if this pressure switch is working. The
manual modulation pressure switch is located on the Hydraulic Clutch Modulation Control (HCM). Disconnect
the 2 pin connector and jumper Pins 1 and 2 of the receptacle.

4. Start the machine and attempt to operate the machine in all gears. If the machine has more than one gear out
of neutral then the manual modulation pressure switch has failed. If the first gear out of neutral is still the only
gear available, proceed to Step 5.

5. From Step 4, the wiring harness between the manual modulation pressure switch and the transmission ECM
is suspect. Remove the transmission ECM from under the cab and disconnect both 40 pin Deutch® connectors.
Check continuity between Pins J1-2 and J2-11 of the machine harness. If continuity is obtained while the
jumper is in place, the transmission ECM has failed. If continuity is not obtained, the wiring harness between
the transmission ECM and the manual modulation pressure switch has failed.

Troubleshooting Faults Detected By The ECM

NOTE: The transmission solenoids are identified with letters (A through H) in this publication. The solenoids
may also be identified with numbers (1 through 8). Solenoid 1 is Solenoid A, Solenoid 2 is Solenoid B, etc.

NOTE: P is used as an abbreviation for Pin. Example: P3 is Pin 3.

NOTE: When Harness with a letter (example: Harness F) is used, the Harness F can be identified on the
electrical schematic.

NOTE: The transmission ECM is seldom the cause of a problem. If the "Troubleshooting With An ECAP"
guide directs you to replace the ECM, then double check your steps to be sure that no mistake was made before
replacing the ECM.

Detected Faults

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Troubleshooting Detected Faults

Use the following charts to troubleshoot the faults identified in Chart 5.

Flash Codes: 21-28, CID-FMI: 641-648 F05, Transmission Solenoid Open Circuit

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Flash Codes: 31-38, CID-FMI: 641-648 F06, Transmission Solenoid Short To Ground

Flash Codes: 41-48, CID-FMI: 641-648 F03, Transmission Solenoid Short To Battery

Flash Code: 52, CID-FMI: 637 F06, Backup Alarm Short To Ground

Flash Code: 58, CID-FMI: 688 F06, VHP Solenoid Short To Ground

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Flash Code: 59, CID-FMI: 688 F03, VHP Solenoid Short To Battery

Flash Code: 61, CID-FMI: 668 F02, Shift Lever Input Invalid

Flash Code: 62, CID-FMI: 668 F03, Shift Lever Open Circuit/Short To +Battery

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Flash Code: 65, CID-FMI: 701 F02, Transmission Output Speed Signal Incorrect

Flash Code: 68, CID-FMI: 168 F01, System (+Battery) Voltage Below Normal

Flash Code: 71, CID-FMI: 520 F02, Invalid Transmission Configuration Code; Flash Code: 72, CID-
FMI: 268 F02, Check Programmable Parameters

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Flash Code: 73, CID-FMI: 764 F05, Transmission Indicator Lamp Open Circuit

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Flash Code: 74, CID-FMI: 764 F06, Transmission Indicator Lamp Short To Ground

Flash Code: 75, CID-FMI: 764 F03, Transmission Indicator Lamp Short To Battery

Flash Code: 76, CID-FMI: 177 F03, Transmission Oil Temperature Sensor short to Battery or Open
Circuit

Flash Code: 77, CID-FMI: 177 F04, Transmission Oil Temperature Sensor short to Ground

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Flash Code: 81, CID-FMI: 868 F05, Auto/Manual Lamp Open Circuit

Flash Code: 82, CID-FMI: 868 F06, Auto/Manual Lamp Short to Ground

Flash Code: 83, CID-FMI: 868 F03, Auto/Manual Lamp Short to Battery

Sensor Signal Voltage Test

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Schematic

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Copyright 1993 - 2009 Caterpillar Inc. Wed Jun 24 21:53:21 UTC+0700 2009
All Rights Reserved.
Private Network For SIS Licensees.

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