Overview of ECC system
See Overview of ECC system
Overview of installation
See Overview of installation
Reading off the control module identification
The control module can be identified by reading off a code from the control module memory. This code contains information about the control module P/N.
Scheme 258
The control module has a built-in diagnostic system, the Volvo on-board diagnostic (OBD) system. This system continuously monitors itself and the input and output signals.
| CAUTION | To communicate with parking heater 912B installed in cars with chassis numbers to 314999 inclusive and in cars with chassis numbers 315000 and later where the early heater unit (30863852) is installed, a special diagnostic cable 9511520 must be used. In certain cars communication with the parking heater cannot be established when the ignition is switched on because of the absence of +15 voltage supply. To communicate with this type of heater it must be started or an attempt to start it must be made using the timer. Single components and functions cannot be activated when the +15 voltage supply is absent. |
The control module can be identified by reading off a code from the control module memory.
This code contains information about the control module P/N
Scheme 259
The timer has an integrated diagnostic system, Volvo on-board diagnostic (OBD) system, which constantly supervises the timer and the in and out signals.