Golf L4-1588cc 1.6L DSL SOHC (1987)
Radiator Cooling Fan Control Module: Technical Service Bulletins
Radiator Cooling Fan System - Change
Applies To
JETTA (from March 1986)
GOLF GL, GTI (8-VALVE), GOLF GT (from 1987 M.Y.) gasoline engine models only
Group
19
Subject
Radiator Cooling Fan System Change
Part Identifier 1908
Key Points
Radiator cooling fan timed run-on
^
To cool fuel lines and fuel injectors
^
To improve hot start characteristics A 278
Number
87-01
March 18,1987
Jetta, Golf GL, GTI (8-Valve) and Golf GT vehicles are now equipped with a radiator cooling fan timed run-on system to cool fuel lines and injectors
after the engine is turned off to improve hot start characteristics.
How the system works
When the underhood temperature is higher than 110~C (230~F) after the ignition is turned off, the thermo switch will trigger the time relay to switch on
the radiator cooling fan.
When the temperature falls below 103~C (217~F) the relay will turn off the radiator cooling fan.. This cycle will repeat once or more for maximum of
10-12 minutes.
WARNING
Never touch the radiator fan blades. They will rotate spontaneously when the time relay turns the fan on. Heat in engine compartment may cause repeat
of this cycle more than once after the ignition is turned off.
New components
Thermo switch
Mounted on bracket on cylinder head (injector side) between cylinder one and two.
Time relay
After thermo switch is grounded, operates radiator fan at first speed for 10-12 minutes after ignition is turned off.
Golf GL, GTI (8-Valve), GT-Fuse relay panel position 13
