Fault Memory Channels: Overview

Fault Memory Channels

Channel Component Checked
1 System faults
2 Not used
3 Interior temperature sensor
4 Outside ambient temperature sensor in plenum chamber
5 Outside ambient temperature sensor in front of radiator
6 Not used
7 Graphic display of control panel head output signals
8 Actual position of temperature regulation flaps
9 Specified position of temperature regulation flaps
10 Specified voltage for blower motor
11 Vehicle voltage
12 Not used
13 Ambient temperature switch
14 High pressure sensor
15 Kickdown switch for automatic transmission vehicles
16 Engine coolant overheat switch input
17 Not used
18 Not used
19 Not used
20 Not used
21 A/C ON signal
22 Number of low voltage occurrences (less than 9.5 volts)
23 Not used


The fault memory will display numerical values in the channels that are not used. These values however, should be disregarded.


The display is limited to 2 1/2 digits. Therefore when a number higher than 199 is to be displayed, the first digit will be displayed as a horizontal and vertical symbol.





Example