Throughout this service manual there are paragraphs that
are marked with a title of DANGER, WARNING, or
CAUTION. These special paragraphs contain specific safety
information and must be read, understood, and heeded
before continuing the procedure or performing the step(s).
DANGER
HAZARDOUS VOLTAGE
You will be severely injured or killed
if you do not follow the procedure.
Components marked with
DANGER High Voltage should be
avoided. Service must be
performed by qualified personnel only.
Danger: Danger indicates you will be severely injured or
killed if do not follow the indicated procedure.
Warning: Warning indicates an immediate hazard, which
could result in severe personal injury if you do not follow
the indicated procedure.
Caution: Caution indicates vehicle or property damage
could occur if you do not follow the indicated procedure.
Note: Note indicates additional detail that will aid in the
diagnosis or repair of a component/system.
Caution: Follow the specified procedures in the indicated
!
order to avoid personal injury:
1. If the high-voltage cones are around the vehicle
and the lockout is installed on the PEC, the only
person that should be allowed to start the vehicle is
the person who signed the lockout tag.
2. Before working on a vehicle or leaving the cab
while the engine is running, you should place the
Shift Lever in “N” set the parking brake, and block
the wheels.
3. For safety reasons, always engage the service
brakes prior to selecting gear positions from “N.”
4. Before starting a vehicle always be seated in the
driver's seat, select “N” on the shift control, and set
the parking brakes.
5. In vehicles with ePTO, the engine and/or
Motor/Generator can start in ePTO mode. Never
perform any maintenance or work on vehicle, while
in this mode.
6. 12-volt Battery (+) and (-) must be disconnected
prior to any welding on any Hybrid equipped
vehicle.
Caution: Follow the specified procedures in the indicated
order to avoid equipment malfunction or damage.
Caution: Do not release the parking brake or attempt to
!
select a gear until the air pressure is at the correct level.
Caution: T o avoid damage to the transmission during tow-
!
ing place the Shift Lever in “N” and lift the drive wheels off
the ground or disconnect the driveline.
You will be severely injured or killed
if you do not follow the procedure.
Components marked with
DANGER High Voltage should be
avoided. Service must be
performed by qualified personnel only.
WARNING
To reduce risk of possible serious
injury (Shock, Burn or Death):
Components marked with High
Voltage should be avoided.
Service must be performed by
qualified personnel only.
HAZARDOUS VOLTAGE
High-Voltage Warnings & Cautions
•Use CO2 or Dry Chemical Fire Extinguishers.
•The high-voltage wiring is covered in orange
insulation or convoluted tubing and marked with
warning labels at the connectors.
•All Eaton® Hybrid Diesel/Electric vehicles will be
marked 'Hybrid' on the outside of the vehicle, along
with the shift label on the dash.
•Refer to OEM for specific location of chassis
mounted hybrid components.
•Do NOT cut into the orange high-voltage cables.
•Do NOT cut into or open the Power Electric
Carrier (PEC).
•Do NOT cut into or open the DC/DC converter.
•Do NOT cut into or open the Inverter.
A buffer zone must be set up and high-voltage insulated
rubber gloves (class 0 with leather protectors) are required
prior to working on high-voltage. Failure to follow these
instructions may result in severe personal injury or death.
The rubber-insulated gloves that must be worn while
working on the high-voltage system are class 0 with leather
protectors. The rubber gloves should be tested before every
use following the rubber insulation gloves testing
procedure (see “Insulated Rubber Glove Test” on page 3).
Failure to follow these instructions may result in severe
personal injury or death.
Before inspecting or working on any high-voltage cables or
components the “High-Voltage Service Shutdown
Procedure” on page 5 should be followed. Failure to follow
these instructions may result in severe personal injury or
death.
The Lockout and Tag-out devices should only be removed
by the technician that placed the Lockout and Tag-out
devices on the vehicle. Failure to follow these instructions
may result in severe personal injury or death.
High-voltage rubber insulated gloves (class 0 with leather
protectors) must be worn when working on any
high-voltage cables. The “High-Voltage Service Shutdown
Procedure” on page 5 must be followed prior to removing
any high-voltage cables. Failure to follow these instructions
may result in severe personal injury or death.
High-voltage cables and wiring are orange and contain a
warning label at the connectors. High-voltage components
are marked with a label. High-voltage rubber insulated
gloves (class 0 with leather protectors) must be used when
working on any of these components. Failure to follow
these instructions may result in severe personal injury
Insulated Rubber Glove Test and High-Voltage Work Area | General InformationTRTS2000
!
Insulated Rubber Glove Test and High-Voltage Work Area
Insulated Rubber Glove Test
Warning: The rubber-insulated gloves that must be worn
while working on the high-voltage system are class 0 with
leather protectors. The rubber gloves should be tested
before EVERY use by following the procedure below. Failure
to follow these instructions may result in severe personal
injury or death.
The insulated rubber gloves that must be worn while
working on the high-voltage system are class 0 rated.
They
must be inspected before each use and must always
be worn in conjunction with the leather outer glove:
•Roll the glove up from the open end until the lower
portion of the glove begins to balloon from the
resulting air pressure. If the glove leaks any air it
must not be used. Any hole in the insulated rubber
glove is a potential entry point for high-voltage.
•The gloves should not be used if they exhibit any
signs of wear and tear.
•The leather gloves must always be worn over the
rubber insulating gloves in order to protect them.
•The rubber insulating gloves must be ASTM
Class
0 electrical insulating rubber gloves with
leather protectors.
High-Voltage Work Area Requirements
Warning: A buffer zone must be set up and ASTM Class 0
!
electrical insulating rubber gloves with leather protectors
are required prior to working on any high voltage. Failure to
follow these instructions may result in severe personal
injury or death.
The buffer zone is required only when working on the
high-voltage DC or AC systems and is called out both in the
“High-Voltage Service Shutdown Procedure” on page 5 and
the individual repair procedures:
•Position the vehicle in the service bay.
•Position 4 orange cones around the corners of
the
vehicle to mark off a 1m (3 ft.) perimeter
around the vehicle.
•Do not allow any unauthorized personnel into
the
buffer zone during repairs involving high
voltage. Only personnel trained for service on
the
High-Voltage Service Shutdown and Power-Up Procedure | General InformationTRTS2000
WARNING
To reduce risk of possible serious
injury (Shock, Burn or Death):
Components marked with High
Voltage should be avoided.
Service must be performed by
qualified personnel only.
HAZARDOUS VOLTAGE
DANGER
HAZARDOUS VOLTAGE
You will be severely injured or killed
if you do not follow the procedure.
Components marked with
DANGER High Voltage should be
avoided. Service must be
performed by qualified personnel only.
High-Voltage Service Shutdown and Power-Up Procedure
A buffer zone must be set up and ASTM Class 0 electrical
insulating rubber gloves with leather protectors are
required prior to working on high-voltage. Failure to follow
these instructions may result in severe personal injury
or
death.
The rubber-insulated gloves that must be worn while
working on the high-voltage system are class 0 with leather
protectors. The rubber gloves should be tested before use
following the rubber insulation gloves testing procedure
(see
“Insulated Rubber Glove Test” on page 3). Failure to
follow these instructions may result in severe personal
injury or
death.
Before inspecting or working on any high-voltage cables or
components the
“High-Voltage Service Shutdown
Procedure” on page 5 should be followed. Failure to follow
these instructions may result in severe personal injury or
death.
The lockout and T ag-out devices should only be removed by
the technician that placed the Lockout Tag-out devices on
the vehicle. Failure to follow these instructions may result in
severe personal injury or death.
ASTM Class 0 electrical insulating rubber gloves with
leather protectors must be worn when working on any highvoltage cables. The
“High-Voltage Service Shutdown
Procedure” on page 5 must be followed prior to removing
any high-voltage cables. Failure to follow these instructions
may result in severe personal injury or death.
High-voltage cables and wiring are orange and contain a
warning label at the connectors. High-voltage components
are marked with a label. ASTM Class 0 electrical insulating
rubber gloves with leather protectors must be used when
working on any of these components. Failure to follow
these instructions may result in severe personal injury
High-Voltage Service Shutdown and Power-Up Procedure | General InformationTRTS2000
High-Voltage Service Shutdown
Procedure
1. Follow “High-Voltage Work Area” procedure (see
“High-Voltage Work Area Requirements” on
page 3).
2. Locate the red Power Electric Carrier (PEC)
service
switch on the front of the PEC and push
to
the Off position.
3. Remove the service switch cover and install the
Lockout Bracket (J48506).
4. Fasten tag to the Lockout Bracket.
5. Ensure the PEC service switch cannot move from
the Off position.
6. Allow the system to set for a minimum of
5
minutes to discharge high-voltage.
7. Connect ServiceRanger and view the Data Monitor
PID 116 “High-Voltage Battery Potential.” Use SPN
520323 for J1939 connection “Battery Voltage RB”
(Relay Box).
8. The voltage should be 30 volts or less. If
the
voltage is above 30 volts, do not work
on
the vehicle and contact Eaton® at
1-800-826-HELP
9. Turn ignition key off and proceed to repair or
troubleshooting step.
Note: The voltage drops to 0 when the key is
turned
off.
(4357).
High-Voltage Service Power-Up
Procedure
1. Install all high-voltage connectors back into their
locked positions.
2. Remove the Lockout Bracket and tag ONLY IF
YOU
ARE THE PERSON WHO IS WORKING ON
THE
VEHICLE.
3. Reinstall the protection bracket over the
service
switch.
4. Pull the service switch out and let vehicle set for
2
Diagnostic Tools and Service Publications | General InformationTRTS2000
Diagnostic Tools and Ser vice Publications
Eaton Tools
•Visit Roadranger.com
ToolDescription
ServiceRanger version 3ServiceRanger PC-based Diagnostic Tool
ServiceRanger version 4ServiceRanger PC-based Diagnostic Tool
SPX/OTC Tools
•Contact SPX / OTC at (800) 328-6657
ToolDescription
J49818Eaton Hybrid Tool Safety Kit - Basic PPE (Items listed below can be ordered separately)
J48603ASTM Class 0 electrical insulating rubber gloves with leather protectors (1000 volt)
J48605Hybrid Safety Cones (set of 4)
J48506Lockout Switch Plate
J48906Lockout Tags (per 25)
ToolDescription
J49819Eaton Hybrid Tool Safety Kit - Basic Plus PPE (Items listed below can be ordered separately)
J48603ASTM Class 0 electrical insulating rubber gloves with leather protectors (1000 volt)
J48605Hybrid Safety Cones (set of 4)
J48506Lockout Switch Plate
J48906Lockout Tags (per 25)
J48907Orange Magnetic Sign
J48608Hybrid Non-Conductive Safety Pole
J48908Glove Bag
Diagnostic Tools and Service Publications | General InformationTRTS2000
ToolDescription
Misc. Service ToolsItems listed below are ordered separately
J48624Nexiq USB-Link Communication Adapter
J43318-A*Pin Adapter Kit - Interface Harness Diagnostics
J48735*Alignment Pins - Hybrid Motor/Gen to Transmission Main Case
AMB-45*Digital Megohmmeter - High-Voltage Leakage Detection
J49111*Clutch Alignment Tool
J46708*Fluke Digital Multimeter
J48505Input Shaft Turning Socket
J48507Lifting Fixture - Power Electronics Carrier
J48502Jack Adapter Plate - Hybrid Drive Unit
5019Transmission Jack - Low Lift
5078Transmission Jack - High Lift
J48577Engine/Transmission Stand Adapter Plate - Hybrid Drive Unit
J29109-AEngine/Transmission Stand - 6000 lb. Rating
ToolDescription
J48893Hybrid PPE/Service Tool Kit (includes J49819 kit and items from Miscellaneous Service Tools
highlighted with *)
Service Publications
1. Visit Roadranger.com
TRSM2000Service Manual (covers external components on transmission and hybrid components)
TRSM0110Service Manual (covers internal transmission repairs only)
TRTS2000Troubleshooting Guide
TRTS2001Troubleshooting Guide for Alternative PEC and Alternative APG
TRDR1000Drivers Instructions
TRDR1110First Responder Guide
CLMT-0365Eaton 365 mm Clutch Installation Procedure
Symptom-Driven Diagnostics Index | General InformationTRTS2000
Symptom-Driven Diagnostics Index
SymptomIsolation ProcedurePage Number
Power-up no crank and gear display shows a dash “-”Front Box Testpage 423
Power-up no crank and gear display shows a “N”Engine Crank T estpage 428
Power-up no crank and gear display shows double
dash “--”, double stars “**” or blank
Power-up vehicle cranks and gear display shows “--”,
“**” or blank
Vehicle acceleration performance is not acceptableHybrid Performance Testpage 432
Transmission will not engage a gear from neutral and
warning tone sounds (solid N in gear display)
Transmission will not move from a stop (solid gear
number in gear display)
Transmission will not engage a gear from neutral
(flashing gear number in gear display).
Red Service light on the Push Button Shift Control is
on/blinking
Amber “Check Hybrid” light on the dash is onFault Code Retrieval and Clearingpage 13
Red “Stop Hybrid” light on the dash is onFault Code Retrieval and Clearingpage 13
ePTO mode does not operate as expectedePTO Testpage 445
Product Diagnostic Mode (PDM) | General InformationTRTS2000
Product Diagnostic Mode (PDM)
Product Diagnostic Mode (PDM) is used to help diagnose
Inactive codes that may have been set during normal
driving. This diagnostic mode increases the sensitivity of
the fault sensing capabilities.
This procedure tests loose, degraded and intermittent
connections.
page 14. Use the Index as a guide to the wiring and
connectors that are associated with the Inactive fault codes.
Flex the wiring harness and connectors and attempt to
recreate the fault after activating PDM.
PDM is only to be used by a trained service technician in an
authorized dealer.
To enter PDM mode:
Note: The vehicle will not start in Product Diagnostic Mode
1. Vehicle must be stationary, engine must not be
2. Connect ServiceRanger to the 9-Way
3. Select the “View Fault Codes” screen.
See “Fault Code Isolation Procedure Index” on
(PDM). Turn vehicle key “OFF” and allow the system
to power down to exit PDM.
running, vehicle parking brake must be set.
Diagnostic
Connector.
PDM will only work with the following
Inactive codes
Hybrid Light and Gear Display Descriptions | General InformationTRTS2000
Hybrid Light and Gear Display Descriptions
All Eaton® hybrid systems use a combination of 3 lights to
indicate failures of different operating systems and the
ability of the vehicle to drive. These lights include the red
“Service” light, amber “Check Hybrid” light, and the red
“Stop Hybrid” light.
Red “Service” Light
•Light is located on the Push Button Shift Control
and reads “Service”.
•Light is turned on and off by the Transmission
Electronic Control Unit (TECU) for automated
transmissions faults over the High Integrity
Link
(HIL).
•Light also comes on momentarily at key on as part
of the TECU self-test.
Amber “Check Hybrid” Light
•Light is located near the middle of the dash. It is
amber and reads “Check Hybrid.”
•Light is turned on and off indirectly by the Hybrid
Control Module (HCM) and directly by the Body
Controller over J1939.
•Light is turned on when a hybrid system fault
is
Active.
•When the amber light is on, the vehicle can still be
driven; however, the vehicle may operate without
hybrid electric assist.
Red “Stop Hybrid” Light
Blinking Amber “Check Hybrid” Light
The majority of vehicles have a red Stop Switch on the front
of the Power Electric Carrier (PEC). If this switch is pushed
in, the amber “Check Hybrid” light will blink.
•To reset, pull switch out and turn key off for 2
minutes. Continue to the diagnostic test for the
fault that is currently Active.
•If the light remains on, go to “Hybrid Diagnostic
Procedure” on page 8 and start with step 3
“Retrieve Active Faults with ServiceRanger.”
•There should be an Active Fault Code 76 FMI 4, or
Fault Code 116, FMI 10.
“ST” in Gear Display
“ST” in the gear display indicates a driver triggered
Snapshot was recorded. Snapshot is a diagnostic tool
used
to capture specific data from the HCM at the time of
a
fault. Snapshot is only available on models with an Eaton
Push Button Shift Control. It is triggered through two
different means:
•Fault code triggered - Specific faults will trigger the
HCM to capture a Snapshot file for later retrieval.
This method will not display an “ST” in the gear
display.
•Driver triggered - If the driver chooses to capture a
Snapshot of an event he/she needs to decide if
he/she wants TECU or HCM data. To capture a
TECU Snapshot select, “Low” and the up button
twice. To capture a HCM Snapshot select, “Drive”
or “Low” and the up button and down button in the
following order: up, down, up, down.
•Light is located near the middle of the dash. The
light is red and reads “Stop Hybrid”.
•Light is turned on and off indirectly by the HCM and
directly by the Body Controller over J1939.
•Light is turned on when a hybrid system fault
is
Active.
•When the light is on, vehicle should not be driven.
Transport the vehicle to the OEM truck dealership.
19
“PD” in Gear Display
A “PD” in the gear display indicates the TECU and HCM are
in a special diagnostic mode called Product Diagnostic
Mode (PDM). For more details on the mode and its
operation,
page 18.
TRTS2000General Information | Hybrid Light and Gear Display Descriptions
“CA” in Gear Display
“CA” in gear display indicates HCM is detecting a clutch
abuse situation.
•If the HCM detects a clutch abuse situation it will
first tone the Push Button Shift Control and flash a
“CA” in the gear display.
•If the clutch abuse situation continues, the hybrid
system will allow only an electric launch in addition
to continuing the tone and the “CA.”
•If the clutch abuse continues while driving, the
hybrid system will open the clutch when vehicle
speed is below 5mph and allow the clutch to cool.
“OS” in Gear Display
“OS” in the gear display indicates the HCM is detecting a
motor overspeed situation. The vehicle will upshift in Drive
and Low automatically; however , if the vehicle is in manual
mode, close to motor overspeed and the driver fails to
upshift, the vehicle will:
•Display an “OS” indicating the driver needs to
press the service brake pedal to slow the vehicle;
or,
Two Dashes “- -” in Gear Display
Two dashes “- -” in the gear display indicates the gear
display has power, and there is no communication present
on the data link, or the TECU isn’t communicating with the
display.
page 17.
See “Symptom-Driven Diagnostics Index” on
Blank Gear Display
A blank gear display indicates the display has lost power , or
the TECU isn’t communicating with the gear display.
“Symptom-Driven Diagnostics Index” on page 17.
See
•The HCM will either upshift the vehicle or reduce
torque to prevent the motor from going overspeed.
“F” in Gear Display
“F” in the gear display indicates the TECU has detected an
Active fault. This fault can be accessed with ServiceRanger.
See “Fault Code Isolation Procedure Index” on page 14.
Dash “-” in Gear Display
A “-” in the gear display indicates the transmission is stuck
in gear.
page 17.
See “Symptom-Driven Diagnostics Index” on
Stars “**” in Gear Display
T wo stars “**” in the gear display indicates the gear display
has power, but no communication on the data link.
TRTS2000Electrical Pretest Procedures | Power-Up Sequence Test
Power-Up Sequence Test
Overview
This test must be performed only when experiencing a
“vehicle won’t crank” with a double dash “- -”, double star
“**”, or blank gear display. The Electrical Pretest must be
performed prior to this procedure.
Detection
The power-up self-check is performed automatically at each
key on. Turn key on and watch the “Service” light. If power
up stops with the “Service” light constantly on, or it never
comes on, self-check has failed.
Fallback
There is no fallback for this test and the vehicle will not
crank if the Tr ansmission Electronic Co ntrol Unit (TECU)
or power supply harness has failed.
This test must be performed prior to diagnosing certain
specific hybrid faults. This test verifies the quality of the
standard battery system and the main power and ground
supplies to the Hybrid Control Module (HCM), T ransmission
Electronic Control Unit (TECU), and Electronic Clutch
Actuator (ECA).
Note: This test is called out in the procedures when it
is required.
Detection
The power-up self-check is performed automatically each
time the key is turned on. Turn the key on and watch the
“Service” light. If power-up stops with the “Service” light
constantly on, or it never comes on, self-check has failed.
Fallback
A weak power supply can cause many issues such as shift
performance, power-up or failure to crank.
Possible Causes
Low-voltage can be caused by the following:
•Low batteries
•Charging system
•Power harness connections or fuses to TECU, HCM
or ECA