Allison Transmission 3000-4800 EVS Error Codes

DTC P0122 Pedal Position Sensor Circuit - Low Voltage

Circuit description

Transmission Control Module (TCM) can receive throttle position input

dampers from a throttle position sensor or a signal transmitted by controls

engine.

In vehicles not equipped with engines with electronic control, position sensor

the throttle is connected to the fuel control rod. Throttle position sensor

The throttle continuously sends the exact throttle position to the TCM.

The throttle position sensor (TPS) is a slide variable resistor

(potentiometer) driven by a linkage. TCM feeds to one of the contacts

TPS resistive strip constant voltage. Another TPS pin is connected to ground. Contacts

TPS resistors provide a regulated voltage signal to the TCM.

Through the mechanical cable of the throttle, the resistor contacts move along

resistive strips. As the contacts move along the resistive strip, TCM

voltage. This stress changes every 0.178 mm of shear along the resistive strip.

The difference between the voltage values is interpreted as the movement of the throttle sensor. In TCM

the stroke of the sensor (in millimeters) is converted to the percentage of throttle opening.

DTC withdrawal conditions

• Nodes are supplied with voltage, and the ignition voltage is more than 9 V and less than 18 V (TCM with voltage

12 V), or more than 9 V and less than 32 V (TCM with a voltage of 24 V).

• Voltage is applied to the nodes, and the input shaft speed is more than 200 rpm.

• DTC P0122 Pedal Position Sensor Circuit - High voltage is not active.

DTC Registration Terms

DTC P0122 is logged if TCM detects that the voltage at the position sensor

The throttle is less than 0.55V for 5 seconds.

Operations performed after DTC registration

• TCM does not turn on the CHECK TRANS indicator (Check gearbox).

• DTC P0122 is stored in the TCM memory.

• TCM uses the default throttle position based on the value

engine torque and crankshaft speed.

• TCM disables gear shift adaptation (DNA).

Conditions for DTC Reset / Off CHECK TRANS Indicator (Check Gearbox)

Allison DOC ™ For PC – Service Tool is used to remove DTC from TCM memory. TCM

automatically deletes the DTC from the memory, if within 40 cycles of warming up the engine a malfunction

not repeated.

Diagnostic Tips

• Check wiring for loose connections at the TCM side. Make sure

in the absence of the following faults:

- deformation of the terminals;

- terminal offsets;

- damage to the terminals;

- unreliably tightened joints;

- frayed wires;

- wire breakage under insulation.

• To identify self-correcting short circuits or breaks, move and lightly

bend the wiring, observing a possible change in the diagnostic readings

equipment.

• You may need to drive a car to detect a malfunction.

• The reason for registering DTC P0122 may be an open circuit or a short to ground in the wire

112 5V reference voltage or TPS 144 signal wire. 5V reference voltage signal,

used by the TPS is also supplied to the oil level sensor (OLS) and the request signal sensor

moderator wire 112. Open circuit or short circuit to ground in the common reference circuit

5 V causes a fault code associated with a low sensor signal, and for

other devices. An open circuit or a short to ground in wire 144 may cause

Registration only DTC P0122.

Verification Description

For this DTC, you must use the J 47275 TCM tap-off adapter. Given

the numbers below refer to the action items in the diagnostic table.

2. Performing this step allows you to check the TPS adjustment.

3. Performing this step allows you to check the ignition voltage.

4. Performing this step allows you to check the TCM reference voltage (5 V).

5. Performing this step allows you to check for dead zones.

in the potentiometer.

6. Performing this step allows you to check whether the TPS resistance is different

from the nominal.

7. Performing this step allows you to check the resistance in the TPS circuit.

8. Performing this step allows you to detect a short circuit to ground or an open circuit.

in the signal wire 144 TPS.

9. Performing this step allows you to check the reference voltage on the TCM (5 V) without wiring,

supplied by the original equipment manufacturer.

10. Performing this step allows you to detect a short circuit to ground or an open circuit.

in a wire 112 of a reference voltage of 5 V.

DTC P0123 Pedal Position Sensor Circuit High Voltage

Circuit description

Transmission Control Module (TCM) Receives Throttle Position Input

from a throttle position sensor or a signal transmitted by engine controls.

In vehicles not equipped with engines with electronic control, position sensor

the throttle is connected to the fuel control rod. Throttle position sensor

The throttle continuously sends the exact throttle position to the TCM.

The throttle position sensor (TPS) is a slide variable resistor

(potentiometer) driven by a linkage. TCM feeds to one of the contacts

TPS resistive strip constant voltage. Another TPS pin is connected to ground. Contacts

TPS resistors are connected so as to provide a constant voltage signal to the TCM.

Through the mechanical cable of the throttle, the resistor contacts move along

resistive strips. As the contacts move along the resistive strip, TCM

voltage. This stress changes every 0.178 mm of shear along the resistive strip.

The difference between the voltage values is interpreted as the movement of the throttle sensor. In TCM

the stroke of the sensor (in millimeters) is converted to the percentage of throttle opening.

DTC P0218 Transmission Oil Temperature Too High

Circuit description

The flow of gear oil begins to move along the contour in the oil pan. From there transmission

oil flows through the filter and piping system of the main body and the front support into the oil

pump assembly. The gears of the gerotor mechanism of the oil pump rotate at a speed of

input shaft and pump the oil pressure in the system. The discharge pressure in the oil pump is adjustable

by means of the main pressure control valve. Oil is supplied under pressure to the module

hydraulic system control, from where it enters the control circuits of the couplings and the valve

trunk pressure control. Trunk pressure is used to open and close.

solenoid control valves that turn on and off the clutch gearbox after

receiving solenoid signals from the transmission control module (TCM).

The oil pump provides a significantly greater oil flow in the system than is required by the managers

contours of couplings. Excessive oil pressure through the main pressure control valve

dumped into the torque converter circuit. In this circuit, oil is supplied under pressure to

a torque converter through a torque converter valve and a torque converter control valve.

Hot oil exiting the torque converter through the torque converter valve and cooling

the pipeline goes to the oil cooler. Chilled gear oil returns

into the gearbox lubrication circuit. The pressure in the lubrication circuit is regulated by a control valve.

a grease that directs excess oil back to the crankcase. temperature sensor

gear oil is part of the gearbox's internal wiring and is intended for

measuring the temperature in the crankcase.

DTC P0602 TCM is not programmed

Circuit description

After powering up and resetting the DTC, the Transmission Control Module (TCM) performs

a self-test procedure to determine the correctness of the calibration data stored in memory.

DTC P0610 Error Additional Vehicle Equipment

with TCM (TransID) (continued)

DTC P0613 TCM Processor

Circuit description

During operation, the transmission control module (TCM) continuously performs a series of operations

data processing called a data cycle. TCM must cycle

processing data in a specified period of time. If TCM fails to complete two

consecutive data processing cycles in a specified period of time, carried out

reboot TCM.

NOTE: DTC P0613 registration indicates that an error has occurred in the TCM associated with with data processing. Contact the company’s technical department

Allison transmission

DTC P0614 Torque Reference Data Mismatch -

electronic control unit / TCM

Circuit description

Power shift control system (SEM) allows the control module

gearbox (TCM) to send a request to the engine control unit to reduce torque

moment. By reducing torque, gear changes are made more quickly. The choice

optimal torque reduces the temperature in the coupling and increases its service life. When

engine torque value exceeds set value, function is used

lower gear torque (LRTP). This function allows you to limit

engine torque in lower gears to protect the gearbox from damage

in case of engine shutdown.

DTC P0634 Internal TCM Temperature Too High

Circuit description

The transmission control module (TCM) is equipped with an internal temperature sensor, which

attaches directly to the circuit board. In case of exceeding the nominal temperature

TCM performs certain actions to protect against overheating.

DTC Registration Terms

DTC P0634 is logged if TCM detects that its internal temperature

exceeds or equal to 140 ºC for 10 seconds with the engine running.

Diagnostic Tips

Clean TCM if necessary. Excessive debris may reduce

TCM radiator efficiency and cause an increase in internal temperature.

DTC P063E Auto Configuration - No Input about throttle position

Circuit description

After initial activation during the first power-up series, the box control module

Transmission (TCM) searches for the throttle position signal. TCM can receive a signal

throttle position from analog throttle position sensor, signal

pulse width modulation (PWM) about the position of the throttle or signal transmitted

via digital channel for data transmission of SAE standard, for example, pedal position data

accelerator and / or engine load (%). TCM registers DTC P063E if during the procedure

no auto throttle position signal not detected.

DTC P063F Auto Configuration - No Input engine coolant temperature

Circuit description

After initial activation during the first power-up series, the box control module

Transmission (TCM) searches for the engine coolant temperature input. TCM

can receive an engine coolant temperature input from an analog sensor

temperature or signal transmitted through a digital channel for data transmission standard SAE. TCM registers DTC P063F if, during the auto-detection procedure, the cooling temperature signal engine fluid not detected.

DTC P0658 Drive 1 Low Voltage (HSD1)

Circuit description

The high voltage side trigger (HSD 1) supplies battery voltage to

Main Mod, PCS4, and PCS6 solenoids over wire 111. HSD1 is constantly on in normal operation conditions, with the exception of short circuit test periods. TCM regulates the control current, supplied to the solenoids by turning the start device on and off on the low side voltage (LSD). DTC P0658 is logged if TCM detects that the voltage

The power supply in the HSD1 circuit is 6 V or less. The reason for registering DTC P0658 may be short short to ground in the high voltage wiring connected to HSD1 (wire 111).

Diagnostic Tips

• You may need to drive a car to detect a malfunction. For determining

operating gear and / or specific operating variables, such as temperature and operating time

Use crash reporting data. This data may be useful for reproducing conditions.

faults and DTC logging.

Check wiring for loose connections at the TCM side and box connector

gears. Check for the following faults:

- deformation of the terminals;

- terminal offsets;

- damage to the terminals;

- unreliably tightened joints;

- frayed wires;

- wire breakage under insulation.

• Check wiring routed by the OEM and inspect points

contacts in which the frayed wire could cause an open circuit. Moving parts

a car, for example, a parking brake drum and suspension components, may touch wiring.

• To identify self-correcting short circuits or breaks, move and lightly

bend the wiring, observing a possible change in the diagnostic readings

equipment.

DTC P0659 Drive 1 High Voltage (HSD1)

Diagnostic Tips

• You may need to drive a car to detect a malfunction. For determining

operating gear and / or specific operating variables, such as temperature and operating time,

Use crash reporting data. This data may be useful for reproducing conditions.

faults and DTC logging.

• Check wiring for loose connections at the TCM side and box connector

gears. Check for the following faults:

- deformation of the terminals;

- terminal offsets;

- damage to the terminals;

- unreliably tightened joints;

- frayed wires;

- wire breakage under insulation.

• Check wiring routed by the OEM and inspect

contact points at which frayed wire could cause an open circuit. Moving parts

a car, for example, a parking brake drum and suspension components, may touch wiring.

• To identify self-correcting short circuits or breaks, move and lightly

bend the wiring, observing a possible change in the diagnostic readings

equipment.

DTC P0702 Electronic Transmission Control System (TransID)

Circuit description

The TransID (TID) function allows the TCM to determine the current software configuration level.

ensure equipment and ensure that the correct calibration data is used. TCM

determines the configuration of the gearbox software via the TID 176 wire. First

versions of Allison's 4th generation controls, wire 176 connected to wire 111

high voltage side trigger 1 (HSD1) in the internal wiring. HSD1 delivers

power supply for Main Mod, PCS4 and PCS6 solenoids. This wiring configuration is designated TID A.

Diagnostic Tips

The reason for registering DTC P0702 may be an open circuit in the wire of the chassis wiring 176.

DTC P0703 Brake Switch Circuit Malfunction

Circuit description

Transmission Control Module (TCM) can be configured to receive through calibration

foot brake status input signal input via analog signal input wire or via

digital channel for data transmission. A mechanical switch is attached to the brake pedal,

used to send a signal directly to the TCM or another vehicle control unit.

When using a different control unit, the TCM receives information about the status of the foot brake

by means of a digital message transmitted over the channel for transmitting vehicle data.

DTC P0703 Indicates TCM Detects Foot Brake Activation State Within 3 Cycles

acceleration or deactivation of the foot brake for 3 deceleration cycles. Possible

Reasons for registering the code:

- faulty wiring;

- incorrect connection of the foot brake sensor;

- malfunction of the foot brake sensor;

- incorrect operation of another control unit transmitting information about the status of the foot

brakes when the brake sensor is not installed or does not work;

- TCM malfunction.

Allison Transmission 3000 HS only rus