Engine | 139, 260, 282 in model 118, 177 |
with code 460 (Canada version) | |
with code 494 (US version) | |
with code 835 (South Korea version) | |
with code 945 (China Stage 6 exhaust treatment) | |
Engine | 176, 256, 264 in model 167, 223 |
with code 460 (Canada version) | |
with code 494 (US version) | |
with code 830 (China version) | |
with code 835 (South Korea version) | |
Engine | 279 in model 223 |
with code 460 (Canada version) | |
with code 494 (US version) | |
with code 830 (China version) | |
with code 835 (South Korea version) |
P47.40-A004-79
Sample display for model 177 |
1 | Fuel tank diagnostic module |
Overview
This document contains information on:
General
Function
General
The fuel tank diagnostic module checks the fuel tank at regular intervals for leaks.
Function
The fuel tank diagnostic module consists of a plastic housing with two hose connections in which the following components are located:
Fuel tank diagnostic module pump
Fuel tank diagnostic module heating element
Fuel tank diagnostic module solenoid valve
Reference leak point
The leak tightness of the fuel tank is checked by the combustion engine control unit by comparing the power consumptions during the generation of an overpressure in the fuel tank without and with the reference leak.
The combustion engine control unit detects the size of the leak by the time that the fuel tank diagnostic module pump has to work until a reference current is achieved.
Leaks from a size of Ø 0.5 mm are detected.