ISO 15031-5:2015 道路車両—排出ガス関連の診断のための車両と外部機器間の通信—パート5：排出ガス関連の診断サービス | ページ 6

3.1.1

absolute throttle position sensor

value intended to represent the throttle opening

Note 1 to entry: For systems where the output is proportional to the input voltage, this value is the percent of maximum input signal. For systems where the output is inversely proportional to the input voltage, this value is 100 % minus the percent of maximum input signal. Throttle position at idle usually indicates greater than 0 % and throttle position at wide open throttle usually indicates less than 100 %.

3.1.2

bank

specific group of cylinders sharing a common control sensor

Note 1 to entry: Bank 1 always contains cylinder number 1 and bank 2 the opposite bank.

Note 2 to entry: If there is only one bank, the DTCs for bank #1 DTCs are used and the word bank may be omitted. With a single “bank” system utilizing multiple sensors, bank #1 DTCs are used in identifying the sensors as #1, #2, and #3 in order as they move further away from the cylinder.

3.1.3

base fuel schedule

fuel calibration schedule programmed into the powertrain control module or PROM when manufactured or when updated by an off-board source, prior to any learned on-board correction

3.1.4

calculated load value

<spark ignition vehicles> typically an indication of the current airflow divided by peak airflow at wide open throttle as a function of rpm, where airflow is corrected for altitude and ambient temperature

Note 1 to entry: Both spark ignition and compression ignition vehicles can use an alternate definition that substitutes engine torque in place of airflow in the calculation.

Note 2 to entry: This definition provides a number (without unit) and provides the service technician with an indication of the percent engine capacity that is being used.

3.1.5

client

function that is part of the tester and that makes use of the diagnostic services

Note 1 to entry: A tester normally makes use of other functions such as database management, specific interpretation, and man-machine interface.

3.1.6

continuous monitoring

sampling at a rate no fewer than two samples per second

Note 1 to entry: If, for control purposes, a computer input is sampled less frequently, the signal of the component may instead be evaluated each time sampling occurs.

3.1.7

convention

Cvt

column integrated in each message table which marks each parameter included

Note 1 to entry: The following conventions are used: C = Conditional: the parameter marked “C” in a request/response message is present only under a condition specified in the bottom row of the message table; M = Mandatory: the parameter marked “M” in a request/response message table is always present; U = User (optional): the parameter marked “U” in a request/response message table is supplied depending on dynamic usage by the manufacturer. The convention recommends a mnemonic, which might be used for implementation. In no case is the specified mnemonic ever a mandatory requirement for any implementation.

3.1.8

electronic control unit

ECU

generic term for any electronic control unit

3.1.9

emissions-related DTC

DTC which is set when a malfunction causes vehicle emissions to exceed legislated emission thresholds or is otherwise required to be set as specified by on-board diagnostics legislation (e.g. disables another part of the diagnostic system)

Note 1 to entry: Normally, the malfunction indicator (MI) is illuminated at the same time as the emissions-related DTC is set. The determination of which DTCs are emissions-related is made by the vehicle manufacturer for each vehicle, as specified by on-board diagnostic legislation.

3.1.10

fuel trim

FT

feedback adjustments to the base fuel schedule

Note 1 to entry: Short-term fuel trim refers to dynamic or instantaneous adjustments. Long-term fuel trim refers to much more gradual adjustments to the fuel calibration schedule than short-term trim adjustments. These long-term adjustments compensate for vehicle differences and gradual changes that occur over time.

3.1.11

negative numbers

signed binary, the most significant bit (MSB) of the binary number used to indicate positive (0)/negative (1)

Note 1 to entry: 2's complement: negative numbers are represented by complementing the binary number and then adding 1.

Note 2 to entry: (–0,99) + (+0,99) = 0.

3.1.12

number

expressed by this symbol “#”

3.1.13

P2, P3 timing parameter

application timing parameters for the ECU(s) and the external test equipment

3.1.14

P2_{CAN_min} timing parameter

CAN application timing parameter with the minimum value for the ECU(s) and the external test equipment to start the response message

3.1.15

P2_{CAN_max} timing parameter

CAN application timing parameter with the maximum value for the ECU(s) and the external test equipment to indicate a response message

3.1.16

P2_reload timing parameter

CAN application timing parameter with the maximum value (P2_{CAN_max}) for external test equipment only

3.1.17

server

function that is part of an ECU that provides the diagnostic services

Note 1 to entry: This part of ISO 15031 differentiates between the server, i.e. the function, and the electronic control unit so that it remains independent from the implementation.

3.1.18

service

information exchange initiated by a client (external test equipment) in order to require diagnostic information from a server (ECU) and/or to modify its behavior for diagnostic purposes

Note 1 to entry: This is also the equivalent of test mode or mode.