V - Diagnostics - CITROEN XSARA Technical Training Manual

V - DIAGNOSTICS
Below are the components which can undergo a diagnostic procedure and the
data received:
COMPONENT ACCESSIBLE BY DIAGNOSTICS
Evaporator sensor output
Air conditioning pressure safety input
Air conditioning pressure signal
Coolant temperature range
Compressor engaging request (BSI to engine ECU)
Compressor engaging authorisation (engine ECU to
BSI)
Compressor control output
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Open circuit
Short circuit
Short circuit to earth
Open circuit
Signal validity
Open circuit (TU5JP)
Short circuit (TU5JP)
Broken connection (EW7J4
and DW10TD)
Signal outside range
(EW7J4 and DW10TD)
Signal value
Short circuit to +12V
Signal value
Open circuit
Short circuit to earth
Chapter 2
DATA RECEIVED