gf0704p2002a

Coolant temperature sensor, basic function

Typ gf · téma 07.04 · verze 0103 · 2020-07-06

Platí pro: Engine all (CAR)

Není k dispozici v jazyce „cs“; zobrazeno v jazyce Angličtina.

Zařazení

Funkční skupina 1 Motor › 07 Příprava směsi › 07.04 Snímače, čidla, senzory — Řada 900 (modely 9**) · Řada 902 (modely 9**) · Řada 904 (modely 918, 919, 924, 925, 938, 943, 957) · Řada 906 (modely 917, 918, 924, 953)

Platí také pro motory/převodovky: 139 ***, 254 ***, 256 ***, 272 ***, 276 ***, 282 ***, 457 9**, 541 9**, 542 9**, 608 ***, 700 4**, 700 420, 700 421, 700 422, 700 423, 715 3**, 715 5**, 722 6**, 722 9**, 724 ***, 724 0**, 724 033, 724 044, 724 045, 724 1**, 724 103, 724 114, 724 115, 724 120, 725 ***, 725 0**, 725 035, 725 037, 725 038, 725 085, 725 1**, 739 390, 739 391, 739 395, 739 396, 739 397, 739 398, 739 399, 740 698, 743 3**, 743 4**, 743 498, 746 971, 924 9**, 924 910, 925 9**, 926 9**

GF07.04-P-2002A

Coolant temperature sensor, basic function

29.06.2020

Engine

all (CAR)

Coolant temperature sensor, basic function

P07.04-3046-79

Example illustration

1

Coolant temperature sensor

Overview

This document contains information on:

General

Function

General

The coolant temperature sensor permanently records the coolant temperature. The detected coolant temperature is transmitted as a voltage signal to the combustion engine control unit.

Function

The coolant temperature sensor measures the coolant temperature and transmits a corresponding voltage signal to the combustion engine control unit.

The NTC resistor integrated in the coolant temperature sensor varies its electrical resistance according to the coolant temperature. The NTC resistor is supplied with 5 V (1 %) by the combustion engine control unit via a series resistor of 1470 Ω (1 %).

NTC (negative temperature coefficient): The electrical resistance falls as the temperature rises (NTC thermistor).

Diagnosis
The signal voltage is plausible between 0.1 V and 4.93 V. If the signal voltage is not plausible, a fault is detected and a substitute value from a stored temperature model is adopted by the combustion engine control unit.