Control. Power. Information. The new 5th Generation Electronic Shift
Selector from Allison puts it all at your fingertips. Literally. Getting started is
easy and the selector’s complete menu of prognostic and diagnostic tools
minimize downtime and keep you on the job. Use this handy reference
booklet for step-by-step instruction on how to get the most from your shift
selector and of course, your Allison fully automatic transmission.
The Allison Advantage
Your Allison Automatic is fully electronically controlled. The Allison
electronic controls package oversees the operation of the transmission,
controlling transmission upshifts and downshifts, and providing important
information on the operation of your drive system.
Through readouts on your shift selector, you will be able to monitor
transmission oil levels, read diagnostic codes and prognostic information.
This manual will help you understand shift selector readouts and enjoy
long, trouble-free operation of your Allison Automatic.
Diagnostics
The Transmission Control Module (TCM) of your Allison Automatic
monitors the transmission’s electronic controls; and when a problem
condition is detected, it:
• May restrict shifting
• Illuminates the CHECK TRANS* light on the instrument panel
• Registers a diagnostic code
Continued illumination of the CHECK TRANS light during vehicle
operation (other than start-up) indicates that the TCM has signaled
a diagnostic code.
NOTE: Displays apply only when using a 5th Gen TCM.
* For some problems, diagnostic codes may be registered without the TCM
activating the CHECK TRANS light. Your Allison Authorized Service Network should
be consulted whenever there is a transmission-related concern. They have the
equipment to check for diagnostic codes and to correct problems.
As the world leader in medium- and heavy-duty commercial transmissions,
Allison Transmission continues its ongoing improvement initiative with the
introduction of 5th Generation Electronic Controls Shift Selectors.
All 5th Generation Electronic Controls Shift Selectors feature easy-to-read
graphic displays that show both text and symbols.
DIGITAL
DISPLAY
MODE
BUTTON
UP/DOWN
ARROWS
DIGITAL
DISPLAY
DIAGNOSTICS
BUTTON
BUMP LEVER
PUSHBUTTON
R - REVERSE N - NEUTRAL D - DRIVE
OEMs may supply shift selectors for some vehicles equipped with 5th
Generation Electronic Controls. If your vehicle is not equipped with an
Allison-supplied shift selector, contact your OEM.
Mode Button
Allison Automatics offer primary and secondary shift
schedule modes to enhance performance or fuel
economy. The vehicle always defaults to the primary
mode [MODE is not shown on graphic display].
If equipped as such you can switch to the secondary
mode by pushing the MODE button [MODE is shown on
graphic display].
Your vehicle may be equipped with FuelSense –
Allison’s next generation in fuel-savings technology.
FuelSense is a set of unique packages of software and
electronic controls that can potentially increase fuel
economy by 20%. FuelSense icons will appear at start
up if your vehicle utilizes a FuelSense package.
2
SECTION 1
WITH PROGNOSTICS +
WITH OIL LEVEL SENSOR
Fluid Levels
The transmission fluid cools, lubricates and transmits hydraulic power,
so it is important that the proper fluid level be maintained at all times.
If the fluid level is too low, the converter and clutches do not receive an
adequate supply of fluids. If the fluid level is too high, the fluid can aerate
causing the transmission to shift erratically or overheat.
Checking Fluid Levels
Use the following procedure to display oil level information.
To enter the oil level function:
1. Park the vehicle on a level surface, shift to N (NEUTRAL)
and apply the parking brake.
2. Using a pushbutton shift selector, simultaneously
press the UP and DOWN arrows one time.
For a bump lever shift selector, press
the DIAGNOSTICS button one time.
3. The fluid level reading will be delayed until the following
conditions are met.
• Engine must be at idle.
• Transmission is in N (NEUTRAL).
• Output speed must be zero.
• Fluid temperature must be between 104F (40C)
and 220F (104C).
• Vehicle has been stationary for two minutes to allow
the fluid to settle.
3
4. The shift selector displays the oil level data as follows:
• CORRECT FLUID LEVEL – The fluid is within the
correct fluid level zone when OK is shown.
• LOW FLUID LEVEL – The display shows the number
of quarts the transmission oil is low.
• HIGH FLUID LEVEL – The display shows the number
of quarts the transmission oil is overfilled.
Delayed Fluid Level Check
If the fluid level check cannot be completed, one of the following
Oil Level Display faults will be shown:
To exit the oil level function:
• For pushbutton shift selector,
press N (NEUTRAL) button.
• For bump lever shift selector, press the
DIAGNOSTICS button until you return to range display.
Prognostic Features
5th Generation Electronic Controls Shift
Selectors display prognostics in text form to
provide at-a-glance status of Oil Life, Filter Life
and Transmission Health.
The WRENCH ICON will illuminate briefly after you turn
the key to the run position on your Allison-equipped
vehicle to indicate that prognostics are enabled. If the
WRENCH ICON remains on or flashes, this indicates there
is a service issue relating to clutch, filter or fluid life.
PUSHBUTTON
BUMP LEVER
4
Oil Life Monitor
The status of the oil life is displayed as a percentage
(OIL LIFE 100%) until fluid is due for a change.
Filter Life Monitor
The status of filter life is displayed as OIL FILTERS OK
and alerts when filters are due for a change with REPLACE FILTERS.
Transmission Health Monitor (not available for TC10)
The status of transmission health is displayed as OK or LO.
Accessing Prognostics
When you are alerted via the WRENCH ICON on the shift selector that service
is due, you can check the status by toggling through the shift selector
display as follows. Be sure to park the vehicle on a level surface, shift to
N (NEUTRAL) and apply the parking brake before accessing prognostics
through the shift selector.
Oil Life Monitor
For a pushbutton shift selector,
simultaneously press the UP and DOWN
arrows two times.
For a bump lever shift selector,
press the DIAGNOSTICS button two times.
The percentage of the
fluid life remaining is
displayed. New fluid is
shown as OIL LIFE 100%.
WITH PROGNOSTICS + WITH OIL LEVEL SENSOR
Filter Life Monitor
For a pushbutton shift selector,
simultaneously press the UP and DOWN
arrows three times.
For a bump lever shift selector, press
the DIAGNOSTICS button three times.
Transmission Health Monitor
For a pushbutton shift selector,
simultaneously press the UP and DOWN
arrows four times.
For a bump lever shift selector, press
the DIAGNOSTICS button four times.
5
Acceptable filter life status
is shown as FILTERS OK,
unacceptable filter life status
is shown as REPLACE FILTERS.
When TRANS HEALTH OK is
shown, clutch maintenance
is not required. When TRANS HEALTH LO is displayed, clutch
maintenance is required.
Resetting Prognostics
Oil Life Monitor
For either a pushbutton or bump lever shift selector, press
and hold the MODE button for approximately 10 seconds
while in Oil Life Monitor mode.
Or
For either a pushbutton or bump lever shift selector,
perform the following shift sequence with the ignition
on, but the engine off. Do not stop the sequence
for more than three seconds once you have started.
N-D-N-D-N-R-N
Filter Life Monitor
For either a pushbutton or bump lever shift selector, press
and hold the MODE button for approximately 10 seconds
while in Filter Life Monitor mode.
Or
For either a pushbutton or bump lever shift selector, perform the
following shift sequence with the ignition on, but the engine off.
Do not stop the sequence for more than three seconds once you
have started.
N-R-N-R-N-D-N
Transmission Health Monitor
This must be reset manually using Allison DOC
program after correcting a clutch system issue.
Exit Prognostics
For a pushbutton shift selector, press the N (NEUTRAL)
range button.
For a bump levershift selector, press the DIAGNOSTICS
range button until back to range display.
6
®
for PC diagnostic
Diagnostic Codes
To enter the diagnostic code function:
1. Bring the vehicle to a complete stop.
Apply the parking brake.
2. For a pushbutton shift selector, simultaneously press
the UP and DOWN arrows five times (four times for TC10).
For a bump lever shift selector,
press the DIAGNOSTICS button five times.
3. Up to five codes may be recorded in memory.
4. Each code remains in the display until the MODE button is pushed, then
the next code is shown. Active codes are shown first, newest to oldest,
followed by any inactive codes still in the memory.
ACTIVE CODES: INACTIVE CODES:
For a detailed list of Diagnostic Transmission Codes for 5th Generation
Electronic Controls Shift Selectors, see pages 17 through 21.
WITH PROGNOSTICS + WITH OIL LEVEL SENSOR
To exit the diagnostic code function:
Any of the following methods may be used.
1. For a pushbutton shift selector, press the N (NEUTRAL)
range button.
2. For a bump levershift selector, press the DIAGNOSTICS
range button until back to range display.
3. Wait approximately 10 minutes and the system will
automatically return to normal operating mode.
4. Turn off the vehicle engine ignition switch.
Drive the vehicle and check for code recurrence. If codes continue to
recur, bring the vehicle to an Allison Authorized Service Network to
diagnose and repair the problem causing the codes.
7
SECTION 2
WITH PROGNOSTICS +
WITHOUT OIL LEVEL SENSOR
Prognostic Features
5th Generation Electronic Controls Shift
Selectors display prognostics in text form to
provide at-a-glance status of Oil Life, Filter Life
and Transmission Health.
The WRENCH ICON will illuminate briefly after you turn
the key to the run position on your Allison-equipped
vehicle to indicate that prognostics are enabled. If the
WRENCH ICON remains on or flashes, this indicates there
is a service issue relating to clutch, filter or fluid life.
Oil Life Monitor
The status of the oil life is displayed as a percentage
(OIL LIFE 100%) until fluid is due for a change.
PUSHBUTTON
BUMP LEVER
Filter Life Monitor
The status of filter life is displayed as OIL FILTERS OK
and alerts when filters are due for a change with REPLACE FILTERS.
Transmission Health Monitor (not available for TC10)
The status of transmission health is displayed as HIGH to LO.
8
Accessing Prognostics
When you are alerted via the WRENCH ICON on the shift selector that service
is due, you can check the status by toggling through the shift selector
display as follows. Be sure to park the vehicle on a level surface, shift to
N (NEUTRAL)
through the shift selector.
and apply the parking brake before accessing prognostics
Oil Life Monitor
For a pushbutton shift selector,
simultaneously press the UP and DOWN
arrows one time.
For a bump lever shift selector,
press the DIAGNOSTICS button one time.
The percentage of the
fluid life remaining is
displayed. New fluid is
shown as OIL LIFE 100%.
Filter Life Monitor
For a pushbutton shift selector,
simultaneously press the UP and DOWN
arrows two times.
For a bump lever shift selector, press
the DIAGNOSTICS button two times.
Acceptable filter life status
is shown as FILTERS OK,
unacceptable filter life status
is shown as REPLACE FILTERS.
WITH PROGNOSTICS + WITHOUT OIL LEVEL SENSOR
Transmission Health Monitor
For a pushbutton shift selector,
simultaneously press the UP and DOWN
arrows three times.
For a bump lever shift selector, press
the DIAGNOSTICS button three times.
9
When TRANS HEALTH OK is
shown, clutch maintenance
is not required. When TRANS HEALTH LO is displayed, clutch
maintenance is required.
Resetting Prognostics
Oil Life Monitor
For either a pushbutton or bump lever shift selector, press
and hold the MODE button for approximately 10 seconds
while in Oil Life Monitor mode.
Or
For either a pushbutton or bump lever shift selector,
perform the following shift sequence with the ignition
on, but the engine off. Do not stop the sequence
for more than three seconds once you have started.
N-D-N-D-N-R-N
Filter Life Monitor
For either a pushbutton or bump lever shift selector, press
and hold the MODE button for approximately 10 seconds
while in Filter Life Monitor mode.
Or
For either a pushbutton or bump lever shift selector, perform the
following shift sequence with the ignition on, but the engine off.
Do not stop the sequence for more than three seconds once you
have started.
N-R-N-R-N-D-N
Transmission Health Monitor
This must be reset manually using Allison DOC
program after correcting a clutch system issue.
Exit Prognostics
For a pushbutton shift selector, press the N (NEUTRAL)
range button.
For a bump levershift selector, press the DIAGNOSTICS
range button until back to range display.
10
®
for PC diagnostic
Diagnostic Codes
To enter the diagnostic code function:
1. Bring the vehicle to a complete stop.
Apply the parking brake.
2. For a pushbutton shift selector, simultaneously
press the UP and DOWN arrows four times.
For a bump lever shift selector,
press the DIAGNOSTICS button four times.
3. Up to five codes may be recorded in memory.
4. Each code remains in the display until the MODE button is
pushed, then the next code is shown. Active codes are shown first,
newest to oldest, followed by any inactive codes still in the memory.
ACTIVE CODES: INACTIVE CODES:
For a detailed list of Diagnostic Transmission Codes for 5th Generation
Electronic Controls Shift Selectors, see pages 17 through 21.
WITH PROGNOSTICS + WITHOUT OIL LEVEL SENSOR
To exit the diagnostic code function:
Any of the following methods may be used.
1. For a pushbutton shift selector, press the N (NEUTRAL)
range button.
2. For a bump levershift selector, press the DIAGNOSTICS
range button until back to range display.
3. Wait approximately 10 minutes and the system will
automatically return to normal operating mode.
4. Turn off the vehicle engine ignition switch.
Drive the vehicle and check for code recurrence. If codes continue to
recur, bring the vehicle to an Allison Authorized Service Network to
diagnose and repair the problem causing the codes.
11
SECTION 3
WITHOUT PROGNOSTICS +
WITH OIL LEVEL SENSOR
Fluid Levels
The transmission fluid cools, lubricates and transmits hydraulic power,
so it is important that the proper fluid level be maintained at all times.
If the fluid level is too low, the converter and clutches do not receive an
adequate supply of fluids. If the fluid level is too high, the fluid can aerate
causing the transmission to shift erratically or overheat.
Checking Fluid Levels
Use the following procedure to display oil level information.
To enter the oil level function:
1. Park the vehicle on a level surface, shift to N (NEUTRAL)
and apply the parking brake.
2. Using a pushbutton shift selector, simultaneously
press the UP and DOWN arrows one time.
For a bump lever shift selector, press
the DIAGNOSTICS button one time.
3. The fluid level reading will be delayed until
the following conditions are met.
• Engine must be at idle.
• Transmission is in N (NEUTRAL).
• Output speed must be zero.
• Fluid temperature must be between 104F (40C)
and 220F (104C).
• Vehicle has been stationary for two minutes to allow
the fluid to settle.
12
4. The shift selector displays the oil level data as follows:
• CORRECT FLUID LEVEL – The fluid is within the
correct fluid level zone when OK is shown.
• LOW FLUID LEVEL – The display shows the number
of quarts the transmission oil is low.
• HIGH FLUID LEVEL – The display shows the number
of quarts the transmission oil is overfilled.
Delayed Fluid Level Check
If the fluid level check cannot be completed, one of the following
Oil Level Display faults will be shown:
WITHOUT PROGNOSTICS + WITH OIL LEVEL SENSOR
To exit the oil level function:
• For pushbutton shift selector, press N (NEUTRAL)
button one time.
• For bump lever shift selector, press the
DIAGNOSTICS button until back to range display.
13
Diagnostic Codes
To enter the diagnostic code function:
1. Bring the vehicle to a complete stop.
Apply the parking brake.
2. For a pushbutton shift selector, simultaneously
press the UP and DOWN arrows two times.
For a bump lever shift selector,
press the DIAGNOSTICS button two times.
3. Up to five codes may be recorded in memory.
4. Each code remains in the display until the MODE button is pushed, then
the next code is shown. Active codes are shown first, newest to oldest,
followed by any inactive codes still in the memory.
ACTIVE CODES: INACTIVE CODES:
For a detailed list of Diagnostic Transmission Codes for 5th Generation
Electronic Controls Shift Selectors, see pages 17 through 21.
To exit the diagnostic code function:
Any of the following methods may be used.
1. For a pushbutton shift selector, press the N (NEUTRAL)
range button.
2. For a bump levershift selector, press the DIAGNOSTICS
range button until back to range display.
3. Wait approximately 10 minutes and the system will
automatically return to normal operating mode.
4. Turn off the vehicle engine ignition switch.
Drive the vehicle and check for code recurrence. If codes continue to
recur, bring the vehicle to an Allison Authorized Service Network to
diagnose and repair the problem causing the codes.
14
SECTION 4
WITHOUT PROGNOSTICS +
WITHOUT OIL LEVEL SENSOR
Diagnostic Codes
To enter the diagnostic code function:
1. Bring the vehicle to a complete stop.
Apply the parking brake.
2. For a pushbutton shift selector, simultaneously
press the UP and DOWN arrows one time.
For a bump lever shift selector,
press the DIAGNOSTICS button one time.
3. Up to five codes may be recorded in memory.
4. Each code remains in the display until the MODE button is pushed, then
the next code is shown. Active codes are shown first, newest to oldest,
followed by any inactive codes still in the memory.
ACTIVE CODES: INACTIVE CODES:
For a detailed list of Diagnostic Transmission Codes for 5th Generation
Electronic Controls Shift Selectors, see pages 17 through 21.
15
To exit the diagnostic code function:
Any of the following methods may be used.
1. For a pushbutton shift selector, press the N (NEUTRAL)
range button.
2. For a bump levershift selector, press the DIAGNOSTICS
range button until back to range display.
3. Wait approximately 10 minutes and the system will
automatically return to normal operating mode.
4. Turn off the vehicle engine ignition switch.
Drive the vehicle and check for code recurrence. If codes continue to
recur, bring the vehicle to an Allison Authorized Service Network to
diagnose and repair the problem causing the codes.
16
Diagnostic Transmission Codes
DIAGNOSTIC TRANSMISSION MAIN CODES P0122-P077F
DIAGNOSTIC
CODE
P0122PEDAL POSITION SENSOR CIRCUIT LOW VOLTAGE
P0123PEDAL POSITION SENSOR CIRCUIT HIGH VOLTAGE
P0218TRANSMISSION FLUID OVER TEMPERATURE CONDITION
P0562SYSTEM VOLTAGE LOW
P057CBRAKE PEDAL POSITION SENSOR LOW
P057DBRAKE PEDAL POSITION SENSOR HIGH
P0602TCM NOT PROGRAMMED
P0603INTERNAL CONTROL MODULE KEEP ALIVE MEMORY ERROR
P0604CONTROL MODULE RANDOM ACCESS MEMORY (RAM)
P0607CONTROL MODULE PERFORMANCE
P060CMAIN PROCESSOR MONITOR FAULT
P0614TORQUE CONTROL DATA MISMATCH - ECM/TCM
P0634TCM INTERNAL TEMPERATURE TOO HIGH
P0642SENSOR REFERENCE VOLTAGE “A” CIRCUIT FAULT
P0652SENSOR REFERENCE VOLTAGE “B” CIRCUIT FAULT
P0657ACTUATOR SUPPLY CIRCUIT VOLTAGE 1 OPEN (HSD 1)
P0658ACTUATOR SUPPLY CIRCUIT VOLTAGE 1 LOW (HSD 1)
P0659ACTUATOR SUPPLY CIRCUIT VOLTAGE 1 HIGH (HSD 1)
P0701TRANSMISSION CONTROL SYSTEM PERFORMANCE
P0703BRAKE SWITCH CIRCUIT
P0708TRANSMISSION RANGE SENSOR CIRCUIT HIGH
P070CTRANSMISSION FLUID LEVEL SENSOR CIRCUIT LOW
P070DTRANSMISSION FLUID LEVEL SENSOR CIRCUIT HIGH
P0712TRANSMISSION FLUID TEMPERATURE SENSOR CIRCUIT LOW
P0713TRANSMISSION FLUID TEMPERATURE SENSOR CIRCUIT HIGH
P0715TURBINE SHAFT SPEED SENSOR CIRCUIT
P0716TURBINE SHAFT SPEED SENSOR CIRCUIT PERFORMANCE
P0717TURBINE SHAFT SPEED SENSOR CIRCUIT NO SIGNAL
P071ANEUTRAL AT STOP INPUT FAILED ON
P071DGENERAL PURPOSE INPUT FAULT
P0720OUTPUT SHAFT SPEED SENSOR CIRCUIT
P0721OUTPUT SHAFT SPEED SENSOR CIRCUIT PERFORMANCE
P0722OUTPUT SHAFT SPEED SENSOR CIRCUIT NO SIGNAL
P0725ENGINE SPEED SENSOR CIRCUIT
P0726ENGINE SPEED SENSOR CIRCUIT PERFORMANCE
P0727ENGINE SPEED SENSOR CIRCUIT NO SIGNAL
P0729INCORRECT 6TH GEAR RATIO
P0731INCORRECT 1ST GEAR RATIO
P0732INCORRECT 2ND GEAR RATIO
P0733INCORRECT 3RD GEAR RATIO
P0734INCORRECT 4TH GEAR RATIO
P0735INCORRECT 5TH GEAR RATIO
P0736INCORRECT REVERSE RATIO
P0 741TORQUE CONVERTER CLUTCH (TCC) SYSTEM STUCK OFF
P0752SHIFT SOLENOID 1 VALVE PERFORMANCE - STUCK ON
P076FINCORRECT 7TH GEAR RATIO
P0776PRESSURE CONTROL SOLENOID (PCS) 2 STUCK OFF
P0777PRESSURE CONTROL SOLENOID (PCS) 2 STUCK ON
P077FINCORRECT REVERSE 2 RATIO
CODE
DESCRIPTION
17
DIAGNOSTIC
CODE
P0796PRESSURE CONTROL SOLENOID (PCS) 3 STUCK OFF
P0797PRESSURE CONTROL SOLENOID (PCS) 3 STUCK ON
P07D9INCORRECT 8TH GEAR RATIO
P07F6INCORRECT 9TH GEAR RATIO
P07F7INCORRECT 10TH GEAR RATIO
P081BCRANK ENABLE CIRCUIT HIGH
P0837FOUR WHEEL DRIVE (4WD) SWITCH CIRCUIT RANGE/PERFORMANCE
P083CTRANSMISSION FLUID PRESSURE SWITCH 6 CIRCUIT LOW
P083CTRANSMISSION FLUID PRESSURE SWITCH 6 CIRCUIT LOW
P083DTRANSMISSION FLUID PRESSURE SWITCH 6 CIRCUIT HIGH
P083DTRANSMISSION FLUID PRESSURE SWITCH 6 CIRCUIT HIGH
P0842TRANSMISSION FLUID PRESSURE SWITCH 1 CIRCUIT LOW
P0843TRANSMISSION FLUID PRESSURE SWITCH 1 CIRCUIT HIGH
P0847TRANSMISSION FLUID PRESSURE SWITCH 2 CIRCUIT LOW
P0848TRANSMISSION FLUID PRESSURE SWITCH 2 CIRCUIT HIGH
P084CTRANSMISSION FLUID PRESSURE SWITCH TCC CIRCUIT LOW
P084DTRANSMISSION FLUID PRESSURE SWITCH TCC CIRCUIT HIGH
P0872TRANSMISSION FLUID PRESSURE SWITCH 3 CIRCUIT LOW
P0873TRANSMISSION FLUID PRESSURE SWITCH 3 CIRCUIT HIGH
P0877TRANSMISSION FLUID PRESSURE SWITCH 4 CIRCUIT LOW
DIAGNOSTIC TRANSMISSION MAIN CODES P0796-P0994
P0878TRANSMISSION FLUID PRESSURE SWITCH 4 CIRCUIT HIGH
P0880TCM POWER INPUT SIGNAL
P0881TCM POWER INPUT SIGNAL PERFORMANCE
P0882TCM POWER INPUT SIGNAL LOW
P0883TCM POWER INPUT SIGNAL HIGH
P088ATRANSMISSION FILTER MAINTENANCE ALERT
P088BTRANSMISSION FILTER MAINTENANCE REQUIRED
P0894UNEXPECTED MECHANICAL GEAR DISENGAGEMENT
P0897TRANSMISSION FLUID DETERIORATED
P0960MAIN PRESSURE MODULATION SOLENOID CONTROL CIRCUIT OPEN
P0961MAIN PRESSURE MODULATION SOLENOID SYSTEM PERFORMANCE
P0962MAIN PRESSURE MODULATION SOLENOID CONTROL CIRCUIT LOW
P0963MAIN PRESSURE MODULATION SOLENOID CONTROL CIRCUIT HIGH
P0964PRESSURE CONTROL SOLENOID (PCS) 2 CONTROL CIRCUIT OPEN
P0966PRESSURE CONTROL SOLENOID (PCS) 2 CONTROL CIRCUIT LOW
P0967PRESSURE CONTROL SOLENOID (PCS) 2 CONTROL CIRCUIT HIGH
P0968PRESSURE CONTROL SOLENOID (PCS) 3 CONTROL CIRCUIT OPEN
P0970PRESSURE CONTROL SOLENOID (PCS) 3 CONTROL CIRCUIT LOW
P0971PRESSURE CONTROL SOLENOID (PCS) 3 CONTROL CIRCUIT HIGH
P0973SHIFT SOLENOID 1 CONTROL CIRCUIT LOW
P0974SHIFT SOLENOID 1 CONTROL CIRCUIT HIGH
P0976SHIFT SOLENOID 2 CONTROL CIRCUIT LOW
P0977SHIFT SOLENOID 2 CONTROL CIRCUIT HIGH
P0979SHIFT SOLENOID 3 CONTROL CIRCUIT LOW
P097ASHIFT SOLENOID 1 CONTROL CIRCUIT OPEN
P097BSHIFT SOLENOID 2 CONTROL CIRCUIT OPEN
P097CSHIFT SOLENOID 3 CONTROL CIRCUIT OPEN
P0980SHIFT SOLENOID 3 CONTROL CIRCUIT HIGH
P0989RETARDER PRESSURE SENSOR CIRCUIT LOW
P0990RETARDER PRESSURE SENSOR CIRCUIT HIGH
P0994TRANSMISSION FLUID PRESSURE SWITCH 5 CIRCUIT LOW
CODE
DESCRIPTION
18
DIAGNOSTIC
CODE
P0994TRANSMISSION FLUID PRESSURE SWITCH 5 CIRCUIT LOW
P0995TRANSMISSION FLUID PRESSURE SWITCH 5 CIRCUIT HIGH
P0995TRANSMISSION FLUID PRESSURE SWITCH 5 CIRCUIT HIGH
P0A0BHIGH VOLTAGE INTERLOCK LOOP 1 INVALID
P0A2FDRIVE MOTOR OVER TEMPERATURE
P0A44DRIVE MOTOR OVERSPEED
P0A7DENERGY STORAGE SYSTEM OVER DISCHARGE
P0A90DRIVE MOTOR INVALID DIRECTION
P0AA6ISOLATION STATUS INVALID
P0B37SERVICE DISCONNECT INVALID
P0C19DRIVE MOTOR TORQUE DELIVERED PERFORMANCE
P0C26ELECTRIC PUMP POWER DRAW TOO HIGH
P0C2CELECTRIC PUMP SPEED INCORRECT
P0C30ENERGY STORAGE SYSTEM OVER CHARGE
P0C76HIGH VOLTAGE BUS DISCHARGE TIME TOO LONG
P0DA8HYBRID BATTERY VOLTAGE/DRIVE MOTOR INVERTER VOLTAGE
P1739INCORRECT LOW GEAR RATIO
P1790GEAR SHIFT MODULE 1 CALIBRATION INVALID
P1791GEAR SHIFT MODULE 2 CALIBRATION INVALID
P1891THROTTLE POSITION SENSOR PWM SIGNAL LOW
P1892THROTTLE POSITION SENSOR PWM SIGNAL HIGH
P1901COUNTERSHAFT SPEED SENSOR CIRCUIT
P1902COUNTERSHAFT SPEED SENSOR PERFORMANCE
P1903COUNTERSHAFT SPEED SENSOR NO ACTIVITY
P1907SHIFT FORK STUCK MOVING TO REVERSE POSITION
P1922TRANSMISSION FLUID PRESSURE SWITCH A CIRCUIT LOW
P1923TRANSMISSION FLUID PRESSURE SWITCH A CIRCUIT HIGH
P1927TRANSMISSION FLUID PRESSURE SWITCH B CIRCUIT LOW
P1928TRANSMISSION FLUID PRESSURE SWITCH B CIRCUIT HIGH
P192CTRANSMISSION FLUID PRESSURE SWITCH C CIRCUIT LOW
P192DTRANSMISSION FLUID PRESSURE SWITCH C CIRCUIT HIGH
P1A01TRANSMISSION CONTROL SYSTEM 2 PERFORMANCE
P1A0CTRANSMISSION FLUID LEVEL SENSOR 2 CIRCUIT LOW
P1A0DTRANSMISSION FLUID LEVEL SENSOR 2 CIRCUIT HIGH
P1A11DC/DC CONVERTER “A” FAULT ACTIVE
P1A12DC/DC CONVERTER “B” FAULT ACTIVE
P1A13ELECTRIC PUMP FAULT ACTIVE
P1A14ENERGY STORAGE SYSTEM FAULT ACTIVE
P1A15INVERTER FAULT ACTIVE
P1A20HIGH VOLTAGE INTERLOCK LOOP 2 INVALID
P1A30INVERTER OPERATING MODE NOT CORRELATED
P1A31ENERGY STORAGE SYSTEM OPERATING MODE NOT CORRELATED
P1A32DC/DC CONVERTER “A” OPERATING MODE NOT CORRELATED
P1A33DC/DC CONVERTER “B” OPERATING MODE NOT CORRELATED
P1A34ELECTRIC PUMP OPERATING MODE NOT CORRELATED
P1A3FINVERTER ISOLATION FAULT
P1A40HIGH VOLTAGE BUS POWER BALANCE
P2184ENGINE COOLANT TEMPERATURE SENSOR 2 CIRCUIT LOW
P2185ENGINE COOLANT TEMPERATURE SENSOR 2 CIRCUIT HIGH
P2637TORQUE MANAGEMENT FEEDBACK SIGNAL A
CODE
DESCRIPTION
CORRELATION
DIAGNOSTIC TRANSMISSION MAIN CODES P0994-P2637
19
DIAGNOSTIC TRANSMISSION MAIN CODES P2641-P281B
DIAGNOSTIC
CODE
P2641TORQUE MANAGEMENT FEEDBACK SIGNAL B
P2669ACTUATOR SUPPLY CIRCUIT VOLTAGE 2 OPEN (HSD 2)
P2670ACTUATOR SUPPLY CIRCUIT VOLTAGE 2 LOW (HSD 2)
P2671ACTUATOR SUPPLY CIRCUIT VOLTAGE 2 HIGH (HSD 2)
P2684ACTUATOR SUPPLY CIRCUIT VOLTAGE 3 OPEN (HSD 3)
P2685ACTUATOR SUPPLY CIRCUIT VOLTAGE 3 LOW (HSD 3)
P2686ACTUATOR SUPPLY CIRCUIT VOLTAGE 3 HIGH (HSD 3)
P26E7ACTUATOR SUPPLY CIRCUIT VOLTAGE 4 OPEN (HSD 4)
P26E8ACTUATOR SUPPLY CIRCUIT VOLTAGE 4 LOW (HSD 4)
P26E9ACTUATOR SUPPLY CIRCUIT VOLTAGE 4 HIGH (HSD 4)
P2714PRESSURE CONTROL SOLENOID (PCS) 4 STUCK OFF
P2715PRESSURE CONTROL SOLENOID (PCS) 4 STUCK ON
P2718PRESSURE CONTROL SOLENOID (PCS) 4 CONTROL CIRCUIT OPEN
P2720PRESSURE CONTROL SOLENOID (PCS) 4 CONTROL CIRCUIT LOW
P2721PRESSURE CONTROL SOLENOID (PCS) 4 CONTROL CIRCUIT HIGH
P2723PRESSURE CONTROL SOLENOID (PCS) 1 STUCK OFF
P27 24PRESSURE CONTROL SOLENOID (PCS) 1 STUCK ON
P2727PRESSURE CONTROL SOLENOID (PCS) 1 CONTROL CIRCUIT OPEN
P2729PRESSURE CONTROL SOLENOID (PCS) 1 CONTROL CIRCUIT LOW
P2730PRESSURE CONTROL SOLENOID (PCS) 1 CONTROL CIRCUIT HIGH
P2732PRESSURE CONTROL SOLENOID (PCS) 5 STUCK OFF
P2733PRESSURE CONTROL SOLENOID (PCS) 5 STUCK ON
P2736PRESSURE CONTROL SOLENOID (PCS) 5 CONTROL CIRCUIT OPEN
P2738PRESSURE CONTROL SOLENOID (PCS) 5 CONTROL CIRCUIT LOW
P2739PRESSURE CONTROL SOLENOID (PCS) 5 CONTROL CIRCUIT HIGH
P273FRETARDER OIL TEMPERATURE SENSOR OVER TEMPERATURE CONDITION
P2742RETARDER OIL TEMPERATURE SENSOR CIRCUIT LOW
P2743RETARDER OIL TEMPERATURE SENSOR CIRCUIT HIGH
P274BTRANSMISSION FLUID TEMPERATURE SENSOR “C” CIRCUIT
P274CTRANSMISSION FLUID TEMPERATURE SENSOR “C” CIRCUIT LOW
P274DTRANSMISSION FLUID TEMPERATURE SENSOR “C” CIRCUIT HIGH
P274FTRANSMISSION FLUID SENSOR “C” OVER TEMPERATURE
P2761TORQUE CONVERTER CLUTCH (TCC) PRESSURE CONTROL
P2763TORQUE CONVERTER CLUTCH (TCC) PRESSURE CONTROL
P2764TORQUE CONVERTER CLUTCH (TCC) PRESSURE CONTROL
P2789TRANSMISSION CLUTCH LIFE EXPIRED (CLUTCH ADAPTIVE
P2793GEAR SHIFT DIRECTION CIRCUIT
P2808PRESSURE CONTROL SOLENOID (PCS) 6 STUCK OFF
P2809PRESSURE CONTROL SOLENOID (PCS) 6 STUCK ON
P2812PRESSURE CONTROL SOLENOID (PCS) 6 CONTROL CIRCUIT OPEN
P2814PRESSURE CONTROL SOLENOID (PCS) 6 CONTROL CIRCUIT LOW
P2815PRESSURE CONTROL SOLENOID (PCS) 6 CONTROL CIRCUIT HIGH
P2817PRESSURE CONTROL SOLENOID (PCS) 7 STUCK OFF
P2818PRESSURE CONTROL SOLENOID (PCS) 7 STUCK ON
P281BPRESSURE CONTROL SOLENOID (PCS) 7 CONTROL CIRCUIT OPEN
CODE
DESCRIPTION
RANGE/PERFORMANCE
CONDITION
SOLENOID (PCS) CONTROL CIRCUIT/OPEN
SOLENOID (PCS) CONTROL CIRCUIT HIGH
SOLENOID (PCS) CONTROL CIRCUIT LOW
LEARNING AT LIMIT)
20
DIAGNOSTIC
CODE
P281DPRESSURE CONTROL SOLENOID (PCS) 7 CONTROL CIRCUIT LOW
P281EPRESSURE CONTROL SOLENOID (PCS) 7 CONTROL CIRCUIT HIGH
P2824PRESSURE CONTROL SOLENOID (PCS) 8 CONTROL CIRCUIT OPEN
P2826PRESSURE CONTROL SOLENOID (PCS) 8 CONTROL CIRCUIT LOW
P2827PRESSURE CONTROL SOLENOID (PCS) 8 CONTROL CIRCUIT HIGH
P2832SHIFT FORK POSITION CIRCUIT PERFORMANCE
P2833SHIFT FORK POSITION CIRCUIT LOW
P2834SHIFT FORK POSITION CIRCUIT HIGH
P2849SHIFT FORK STUCK MOVING TO FORWARD POSITION
P284DSHIFT FORK UNREQUESTED MOVEMENT
P2879ENGINE/HYBRID CLUTCH SYSTEM SLIPPING
P287AENGINE CLUTCH STUCK ON
C1312RETARDER REQUEST SENSOR CIRCUIT LOW
C1313RETARDER REQUEST SENSOR CIRCUIT HIGH
U0073CAN COMMUNICATION BUS 1 OFF
U0074CAN COMMUNICATION BUS 2 OFF
U0100LOST COMMUNICATIONS WITH ECM A
U0103LOST COMMUNICATION WITH GEAR SHIFT MODULE 1
U0110LOST COMMUNICATION WITH DRIVE MOTOR CONTROL MODULE
U0111LOST COMMUNICATION WITH ENERGY STORAGE SYSTEM
U0287LOST COMMUNICATION WITH ELECTRIC PUMP
U0291LOST COMMUNICATION WITH GEAR SHIFT MODULE 2
U0298LOST COMMUNICATION WITH DC/DC CONVERTER “A”
U0299LOST COMMUNICATION WITH DC/DC CONVERTER “B”
U0304GEAR SHIFT MODULE 1 INCOMPATIBLE
U0333GEAR SHIFT MODULE 2 INCOMPATIBLE
U0404GEAR SHIFT MODULE 1 INVALID DATA
U0411INVERTER INVALID DATA
U0412ENERGY STORAGE SYSTEM INVALID DATA
U0588ELECTRIC PUMP INVALID DATA
U0592GEAR SHIFT MODULE 2 INVALID DATA
U0599DC/DC CONVERTER “A” INVALID DATA
U059ADC/DC CONVERTER “B” INVALID DATA
CODE
DESCRIPTION
CONTROL MODULE
DIAGNOSTIC TRANSMISSION MAIN CODES P281D-U059A
21
Information contained in this brochure is designed to give you
an overview of the Oil Level Sensor, Diagnostics and Prognostic
Features on your Allison Automatic and is not intended to replace
your Operator’s Manual.
To order an Operator’s Manual, go to allisontransmission.com or
call toll free 888-666-5799.
One Allison Way
Indianapolis, Indiana, USA 46222-3271
Information or specifications subject to
change without notice or obligation.
allisontransmission.com
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