Connector Pin Assignment
See PIN ASSIGNMENT AND POWER DEFINITION FOR 31-CONTACT CONNECTOR (POWERTRAIN) for pin assignments and power definitions for the 31-contact connector used for engine, transmission and chassis data networks, controls and signal. The connector defined in PIN ASSIGNMENT AND POWER DEFINITION FOR 31-CONTACT CONNECTOR (POWERTRAIN) must contain a label to define chassis reference signal voltage (12-volt or ground) and the baud rate of the chassis data communication line.
See PIN ASSIGNMENT AND CIRCUIT DEFINITION FOR POWER AND GROUND-8-CONTACT CONNECTOR for pin assignments and power definitions for the 8-contact connector used for power and ground. See PIN ASSIGNMENT AND POWER DEFINITION FOR 14-CONTACT CONNECTOR (EXTERIOR LIGHTING) for pin assignments and power definitions for the 14-contact connector used for chassis and body lighting functions. See ENGINE PIN FUNCTIONALITY BY MODEL for engine pin: functionality by model. See TRANSMISSION PIN FUNCTIONALITY BY TRANSMISSION MODEL for transmission pin functionality by model.
PIN ASSIGNMENT AND POWER DEFINITION FOR 31-CONTACT CONNECTOR (POWERTRAIN)
| Cavity | Name | Source | Type | Function | Capacity (amps) | Wire Gauge | Details |
|---|---|---|---|---|---|---|---|
| 1 | Tachometer | engine | signal | R Terminal of Alternator | 0.1 | 18 | per TMC RP123A |
| 2 | ABS Response | ABS | signal | Retarder Disable | 1 | 18 | Ground signal activated to trigger a retarder disable relay |
| 3 | Throttle Limit | engine | signal | input | 0.1 | 18 | See ENGINE PIN FUNCTIONALITY BY MODEL |
| 4 | Throttle Advance | engine | signal | input | o - | 18 | See ENGINE PIN FUNCTIONALITY BY MODEL |
| 5 | J1939 | engine | signal | communication | 0.1 | 18 | See ENGINE PIN FUNCTIONALITY BY MODEL. CAN H |
| 6 | J1939 | engine | signal | communication | 0.1 | 18 | See ENGINE PIN FUNCTIONALITY BY MODEL, CAN L |
| 7 | Throttle nterlock | engine | signal | input | 0.1 | 18 | See ENGINE PIN FUNCTIONALITY BY MODEL |
| 8 | Road Speed limit | engine | signal | input | 0.1 | 18 | See ENGINE PIN FUNCTIONALITY BY MODEL |
| 9 | Input Reference | engine | reference | electronic reference | 1 | 18 | See ENGINE PIN FUNCTIONALITY BY MODEL, ECU reference |
| 10 | Input 3 | engine | signal | reserved input | 0.1 | 18 | See ENGINE PIN FUNCTIONALITY BY MODEL |
| 11 | Input 4 | engine | signal | reserved input | 0.1 | -8 | See ENGINE PIN FUNCTIONALITY BY MODEL |
| 12 | Input 5 | engine | signal | reserved input | 0.1 | 18 | See ENGINE PIN FUNCTIONALITY BY MODEL |
| 13 | Input 6 | vehicle | signal | Park Brake Applied | 0.1 | 18 | Ground signal activated when parking brake is applied |
| 14 | spare | spare | spare | spare | 0.1 | 18 | spare |
| 15 | Input Reference | transmission | reference | electronic +12 reference | 1 | 18 | See TRANSMISSION PIN FUNCTIONALITY BY TRANSMISSION MODEL, TCU +12V reference, Allison 163 |
| 16 | Speedometer | transmission | signal | Speedometer pulse | 0.1 | 18 | See TRANSMISSION PIN FUNCTIONALITY BY TRANSMISSION MODEL, per TMC RP123A, Allison 125 |
| 17 | TCU Common | transmission | ground | electronic ground reference | 1 | 18 | See TRANSMISSION PIN FUNCTIONALITY BY TRANSMISSION MODEL, TCU ground reference, Allison 103 |
| 18 | Prog. Input 1 | transmission | signal | reserved input | 0.1 | 18 | See TRANSMISSION PIN FUNCTIONALITY BY TRANSMISSION MODEL, Alison 123 |
| 19 | Prog. Input 3 | transmission | signal | EOS enable typ. | 0.1 | 18 | See TRANSMISSION PIN FUNCTIONALITY BY TRANSMISSION MODEL, Alison 143 |
| 20 | Prog. Input 4 | transmission | signal | reserved input | 0.1 | 18 | See TRANSMISSION PIN FUNCTIONALITY BY TRANSMISSION MODEL, Al ison 122 |
| 21 | Prog. Input 5 | transmission | signal | Auto Neutral typ. | 0 1 | 18 | See TRANSMISSION PIN FUNCTIONALITY BY TRANSMISSION MODEL, Al ison 142 |
| 22 | Prog. Input 6 | transmission | signal | Shift Selector Transition typ. | 0.1 | 18 | See TRANSMISSION PIN FUNCTIONALITY BY TRANSMISSION MODEL, Al ison 101 |
| 23 | Prog. Input 9 | transmission | signal | reserved input | 0.1 | 18 | See TRANSMISSION PIN FUNCTIONALITY BY TRANSMISSION MODEL, Al ison 162 |
| 24 | Prog. Input 10 | transmission | signal | Auto Neutral typ. | 0.1 | 18 | See TRANSMISSION PIN FUNCTIONALITY BY TRANSMISSION MODEL. Al ison 117 |
| 25 | Prog. Output 1 | transmission | signal | EOS signal typ. | 0.5 | 18 | See TRANSMISSION PIN FUNCTIONALITY BY TRANSMISSION MODEL, Al ison 130 |
| 26 | Prog. Output 3 | transmission | signal | Neutral indicator typ. | 0.5 | 18 | See TRANSMISSION PIN FUNCTIONALITY BY TRANSMISSION MODEL, Al ison 145 |
| 27 | Prog. Output 4 | transmission | signal | Output Speed Indicator typ. | 0.5 | 18 | See TRANSMISSION PIN FUNCTIONALITY BY TRANSMISSION MODEL, Al ison 105 |
| 28 | Prog. Output 6 | transmission | signal | Trans Temp typ. | 0.5 | 18 | See TRANSMISSION PIN FUNCTIONALITY BY TRANSMISSION MODEL, Al ison 164 |
| 29 | Prog. Output 7 | transmission | signal | Neutral Indicator Output | 2 | 18 | See TRANSMISSION PIN FUNCTIONALITY BY TRANSMISSION MODEL, +12V neutral indicator |
| 30 | reference | vehicle | reference | +12V ignition signal | 5 | 18 | +12V ignition reference |
| 31 | Prog. Output 8 | vehicle | signal | +12V secondary control signal | 2 | 18 | See TRANSMISSION PIN FUNCTIONALITY BY TRANSMISSION MODEL, +12V signal activated when vehicle is switched to secondary control mode |
| Chassis Side Connector: HDP24-24-31SE Body Builder Connector: HDP26-24-31PE |
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PIN ASSIGNMENT AND CIRCUIT DEFINITION FOR POWER AND GROUND-8-CONTACT CONNECTOR
| Cavity | Source | Type | Amp Rating | Wire Gauge | Details |
|---|---|---|---|---|---|
| 1 | Chassis | Power | 20 | 12 | Battery (+) thru Disconnct switch (If disconnect switch specified) |
| 2 | Chassis | Power | 20 | 12 | Hot with crank, Ignition controlled battery (+) thru Disconnct switch (If disconnect switch specified) |
| 3 | Chassis | Power | 20 | 12 | Hot with crank, Ignition controlled battery (+) thru Disconnct switch (If disconnect switch specified) |
| 4 | Chassis | Power | 15 | 14 | Battery (+) Constant Hot |
| 5 | Chassis | Power | 25 | 12 | Ignition controlled Battery (+) Controlled through Reverse circuit |
| 6 | Chassis | Ground | 25 | 12 | Ground (-) Battery Direct |
| 7 | Chassis | Ground | 25 | 12 | Ground (-) Battery Direct |
| 8 | Chassis | Ground | 25 | 12 | Ground (-) Battery Direct |
| Chassis Side Connector: HDP24-18-8SN -Variation for seals (N, E) Body Builder Connector: HDP26-18-8PN -Variation for seals (N, E) | |||||
PIN ASSIGNMENT AND POWER DEFINITION FOR 14-CONTACT CONNECTOR (EXTERIOR LIGHTING)
| Cavity | Name | Source | Type | Function | Capacity (amps) | Wire (AWG) | Details |
|---|---|---|---|---|---|---|---|
| 1 | Ground | Chassis | Ground | Battery, Direct | 75 | 4 | Battery Constant Ground |
| 2 | Backup | Chassis | Signal | Lamp | 15 | 12 | via ECU, f equipped |
| 3 | Left Stop/Turn | Chassis | Signal | Lamp | 5 | 16 | via ECU, f equipped |
| 4 | Right Stop/Turn | Chassis | Signal | Lamp | 5 | 16 | via ECU, f equipped |
| 5 | Tail/Marker | Chassis | Signal | Lamp | 10 | 14 | via ECU, f equipped |
| 6 | Clearance | Chassis | Signal | Lamp | 10 | 14 | via ECU, f equipped |
| 7 | Stop | Chassis | Signal | Lamp | 10 | 14 | via ECU, f equipped |
| 8 | Plugged - reserved work lamp | Chassis | Signal | Lamp | - | - | via ECU, f equipped |
| 9 | Plugged - reserved strobe amp | Chassis | Signal | Lamp | - | - | via ECU, f equipped |
| 10 | Plugged | - | - | - | - | - | - |
| 11 | Plugged | - | - | - | - | - | - |
| 12 | Plugged | - | - | - | - | - | - |
| 13 | Left Turn | Chassis | Signal | Lamp | 5 | 16 | via ECU, if equipped |
| 14 | Right Turn | Chassis | Signal | Lamp | 5 | 16 | via ECU, if equipped |
| Chassis Side Connector: HDP24-24-14SN - Variation allowed for seal diameter (N, T, E seals) and for modifications (L015, L017, L024) Body Builder Connector: HDP26-24-14PN - Variation allowed for seal diameter (N, T, E seals) and for modifications (L015, L017, L024) |
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ENGINE PIN FUNCTIONALITY BY MODEL
| Connector Name | Cavity | Pin Name | Cummins | Mack | Maxxforce | Detrc t Diesel | Paccar MX | hxtended Definition | Method |
|---|---|---|---|---|---|---|---|---|---|
| Powertrain | 3 | Throttle Limit | 2016 Diesel ISB/C/L pin 66; 2016 ISL G pin 12 (31 way): Max engine speed OR road speed/gov |
VECU B:21 (PT02) CUMMINS ISL G: Relay to ECM 1 | CPC5 Throttle Limiter 0 (CPC5 - 1/11) | TBD | Engine speed will be limited to programmed value. With a Cummins engine, this input may also be used to limit road speed limit. These two features are currently mutually exclusive. | Short to pin 9 | |
| Powertrain | 4 | Throttle Advance | 2016 Diesel ISB/C/L pin 94:2016 ISL G pin 23 (31 way): Remote PTO On/Off | VECU A:29 (PT01) | CPC5 Remote VSG Select (CPC5-2/9) | Pin 21: PTO On/Off | Engine speed will jump to programmed value | Short to pin 9 | |
| Powertrain | 5 | J1939 | 2016 Diesel ISB/C/L pin 22 (500k); 2016 ISL G pin A (3 way): CAN H | VECU A:16 | CAN H | Pin 29: (500k) CAN H | CANH | Backbone with movable terminating resistor;
NOTE:
CAN wires must be labeled indicating baud rate used.
|
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| Powertrain | 6 | J1939 | 2016 Diesel ISB/C/L pin 46 (500k); 2016 ISL GpinB (3 way): CAN L | VECU A:15 | CAN L | Pin 37: (500k) CAN _ | CAN L | Backbone with movable terminating resistor;
NOTE:
CAN wires must be labeled indicating baud rate used.
|
|
| Powertrain | 7 | Throttle Interlock | 2016 Diesel ISB/C/L Pin 93; 2016 ISL G pin 13 (31 way): Accelerator Interlock |
VECU B:21 (PTO3) CUMMINS ISL G: Relay to ECM 13 | Remote Preset PTO (K997CB) | CPC5 Throttle Inhibit (CPC5 - 1/17) |
Pin 34: Throttle Limit | This will disable the primary accelerator | Short to pin 9 |
| Powertrain | 8 | Road Speed Limit | See Cavity 3 | VECU A:17 (PT04) CUMMINS ISL G: N/A |
Set Coast Switch (K46D) | CPC5 Throttle limiter 1 (CPC5 - 2/11) | TBD | Road speed will be limited to programmed value. With a Cummins engine, this input is mutually exclusive with cavity 3. |
Short to pin 9 |
| Powertrain | 9 | input common | 2016 Diesel ISB/C/L pin 62; 2016 ISL G pin 19 (31 way): ECM switch return | Ignition power relay | 12V 1 Amp Source (K97DF) | ECM switch retun | ECM switch return | Reference for Switches (+ or - by OEM) | Source for input signals
NOTE:
wire must be labeled indicating + or - source.
|
| Powertrain | 10 | input 3 | 2016 Diesel ISB/C/L pin 90; 2016 ISL G pin 9 (31 way): CC/PTO On/Off | VECU Pin A3 | CPCCC On/Off (CPC5-1/14) | N/A | Reserved: This cavity is not required for all applications. It is reserved as an optional input for applications that will utilize this feature. This will enable Road speed control while moving. Or will enable engine speed control while parked or at low speed. | Short to pin 9 | |
| Powertrain | 11 | input 4 | 2016 Diesel ISB/C/L pin 12; 2016 ISL G pin 8 (31 way): CC/PTO Set | VECU Pin A1 | CPCCC Set/Coast (CPC5 - 1/12) | CECU: B15 | Reserved: This cavity is not required for all applications. It is reserved as an optional input for applications that will utilize this feature. This will set or decrease road or engine set speed. |
Short to pin 9 | |
| Powertrain | 12 | input 5 | 2016 Diesel ISB/C/L pin 19;2016 ISL G pin 7 (31 way): CC/PTO Resume | VECU PinA2 | CPC CC Resume/Accelerate (CPC5 - 1/16) | CECU: B16 | Reserved: This cavity is not required for all applications. It is reserved as an optional input for applications that will utilize this feature. This will resume from a dropout of cruise or engine speed control or will increase set speed | Short to pin 9 |
TRANSMISSION PIN FUNCTIONALITY BY TRANSMISSION MODEL
| Connector Name | Cavity | Pin Name | Details | Function | Allison Reference (wire #) | Allison Function Description | Method |
|---|---|---|---|---|---|---|---|
| Powertrain | 15 | TCU +12V reference | TCU +12V reference, Allison 163 | electronic reference | (#163) | +12V reference | source for input signals |
| Powertrain | 16 | Speedometer | per TMC RP123A, Allison 125 | Speedometer | (#125) | 0 - (Vbat-2) V pulse. 50% duty cycle square wave. Pulses per rev adjusted via software. | |
| Powertrain | 17 | TCU common | TCU ground reference, Allison 103 | electronic reference | (#103) | ground reference | source for input signals |
| Powertrain | 18 | prog. Input 1 | Allison 123 | Split Shaft Transition or Neutral at Stop | Input function AJ or AS (#123) typ. | Reserved: This cavity is not required for all applications. It is reserved as an optional input for applications that will utilize this feature. Input Function AJ: Switching split shaft transition input alerts the transmission that pump mode has been requested. Input function AS: Neutral at Stop input alerts the transmission of a request to enter a reduced load state referred to as Neutral at Stop. |
short to pin 15 |
| Powertrain | 19 | prog. Input 3 | Allison 143 | EOS enable typ. | Input Function C (#143) | Switching EOS Signal input function to power alerts the TCM that PTO operation has been requested. When function is enabled and all of the required operating conditions exist, the TCM activates EOS Enable by switching power to the output wire. Required operating conditions for enabling this function are: 1 - Throttle position is low; 2 -engine speed is within customer modifiable constant limits; 3 -output speed is within customer modifiable constant limits (refer to Allison input Function C for a more accurate description). | short to pin 15 |
| Powertrain | 20 | prog. Input 4 | Allison 122 | Pump Mode typ. | Input function AJ (#122) typ. | Reserved: This cavity is not required for all applications. It is reserved as an optional input for applications that will utilize this feature. Input 122 is activated when split shaft PTO is fully encaged. |
short to pin 17 |
| Powertrain | 21 | prog. Input 5 | Allison 142 | Auto Neutral typ. | Input Function AG (#142) | When ground is applied to these 2 Inputs (117/142), the transmission is commanded to Neutral. Upon disabling the inputs, if the engine speed slows to less than 900 rpm within 3 seconds, the transmission is returned to drive.
NOTE:
When Auto Neutral is active, the TCM activates Neutral Indicator for PTO (Allison output function S).
|
short to pin 17 |
| Powertrain | 22 | prog. Input 6 | Allison 101 | Shift Selector Transition typ. | Input function D (#101) | Input provides a means for the operator to select whether shift selector 1 (function d sabled) or shift selector 2 (function enabled) is to be used for cont'd of the transmission. | short to pin 17 |
| Reserved: This cavity is not required for all applications. It is reserved as an optional input for applications that will utilize this feature. | |||||||
| Powertrain | 23 | prog. Input 9 | Allison 162 | Service Brake Status typ. | Input Function AA (#162) | ** Specific to Allison** Switching Service Brake Status Input function from open to ground to enable this function. The enabled function indicates to the TCM whether vehicle braking is being provided by retarder or vehicle brakes, so that the transmission controls can be adapted accordingly. | short to pin 17 |
| Powertrain | 24 | prog. Input 10 | Allison 117 | Auto Neutral typ. |
Input Function AG (#117) | When ground is applied to these 2 Inputs (117/142), the transmission is commanded to Neutral. Upon disabling the inputs, if the engine speed slows to less than 900 rpm within 3 seconds, the transmission is returned to drive.
NOTE:
When Auto Neutral is active, the TCM activates Neutral Indicator for PTO (Allison output function S).
|
short to pin 17 |
| Powertrain | 25 | prog. Output 1 | Allison 130 | EOS signal typ. |
Output Function G (#130) | Switching EOS Signal input function (143) to power alerts the TCM that PTO operation has been requested. When function is enabled and all of Ihe required operating conditions exist, the TCM activates EOS Enable (130) by switching pcwer to the output wire. Required operating conditions for enabling this function are: 1 - Throve position is low; 2 - engine speed is within customer modifiable constant limits; 3 - output speed is within customer modifiable constant limits (refer to Allison input Function C for a more accurate description). | +12V when active |
| Powertrain | 26 | prog Output 3 | Allison 145 | Neutral Indicator typ. | Output Function S (#145) | This function is activated by the TCM switching the wire from open to ground, when the transmission is in neutral. It also has to be switched to ground when the Auto Neutral function is active. | ground when active |
| Powertrain | 27 | prog. Output 4 | Allison 105 | Output Speed Indicator typ. | Output Function D (#105) | This output function is activated by the TCM switching from open to ground, which occurs when the TCM detects that a preset output speed has been exceeded in either forward or reverse. The speed setting at which activation occurs is customer modifiable. | ground when active |
| Powertrain | 28 | prog. Output 6 | Allison 164 | Trans Temp typ. | Output Function B (#164) | This output function is activated by the TCM switching the wire from open to ground, which occurs when transmission sump temperature exceeds any of the programmed threshods: 121°C (250°F) for 15 minutes 127°C (260°F) for 1 minute 132°C (270°F) instantaneously 166°C (330°F) inretarder (if equipped) instantaneously | ground when active |
| Powertrain | 29 | prog. Output 7 | supplied by vehicle | +12V neutral indicator | This function is activated by switching the wire from open to +12V, when the transmission is in neutral. It also has to be switched to +12V when the Auto Neutral function is active. | +1 2V when active | |
| Powertrain | 31 | prog. Output 8 | supplied by vehicle | -'2V secondary mode |
This function is activated when control is switched to secondary mode | +12V when active | |
| Chassis Side Connector: HDP24-24-31SE Body Builder Connector: HDP26-24-31PE |
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