Corrado L4-1781cc 1.8L SOHC SC (PG) (1990)
Fuel Injector: Testing and Inspection
Checking Voltage Supply and Resistance
Checking injector voltage supply and resistance
WARNING! Fire Hazard. Do not smoke or have anything in area that can ignite fuel.
Requirement
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Hall sender OK, checking, See: Computers and Control Systems/Ignition Hall Effect Sensor/Testing and Inspection
- disconnect harness connector 1 from connector 2
- check fuel injector supply voltage at harness connector 1 using US 1115 LED tester and jumper wires from VW 1594 adaptor kit
- operate starter
-
LED tester must flicker
If LED does not flicker and does not light up
- re-connect harness connector 1 with connector 2
- locate break in wiring for injectors (N 30, N 31, N 32, N 33) and eliminate
If wiring OK
- replace Digifant control unit (J 169)
- switch Fluke 83 multimeter to resistance range
- check fuel injector resistance at connector 2 using multimeter and jumper wires from VW 1594 adaptor kit
If 3.7 to 5.0 Ohms
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all 4 injectors OK
If 5.0 to 6.7 Ohms
-
3 injectors OK
If 7.5 to 10.0 Ohms
-
2 injectors OK
If 15.0 to 20.0 Ohms
-
1 injector OK