Relay For Pump, Fuel Cooling J445 - Volkswagen 1.9-Liter TDI Owner's Manual

Relay for Pump, Fuel Cooling J445

The Relay for Pump, Fuel Cooling J445 is
located on the engine control module
mounting bracket.
It is activated by the Diesel Direct Fuel
Injection Engine Control Module J248 at a
fuel temperature of 158°F (70°C) and
switches the working current for the Pump
for Fuel Cooler V166.
Effects of failure
If the Relay for Pump, Fuel Cooling J445
fails, the heated fuel flowing back from
the pump/injectors to the fuel tank will not
be cooled.
The fuel tank and the Sender for
Fuel Gage G can be damaged.
Electrical circuit
J248 Diesel Direct Fuel Injection
Engine Control Module
J317 Power Supply (Terminal 30, B+) Relay
J445 Relay for Pump, Fuel Cooling
S Fuse
V166 Pump for Fuel Cooler
The Output Check Diagnosis
function in the self-diagnosis can
be used to check whether the
Relay for Pump, Fuel Cooling
J445 has been activated by the
Diesel Direct Fuel Injection
Engine Control Module J248.
Engine Management
J317
S
M
SSP209/071
A/ +
S
J248
J445
V166
SSP209/072
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