heating AUDI A4 1995 B5 / 1.G APB Engine Additional Signals Checking Workshop Manual
Page 3 of 37
24-181
Coolant temperature signal, checking
Notes:
The engine control module receives the coolant
temperature signal from the instrument cluster.
When the signal is received, the charge
pressure is reduced to prevent the engine from
overheating.
Electrical Wiring Diagrams, Troubleshooting & Component Locations - Connect VAG1598/31 test box to wiring harness for engine control
module. Do not connect to the engine control module itself Page 24
-
20
.
- Check wiring from test box socket 19 to instrument cluster according to
wiring diagram for an open circuit.
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