P1216

P1216
Injector Circuit, cylinder 4 - Short to B+
Fuel Injector, cylinder 4 - Short to B+

P1228
Injector Circuit, Cylinder 4 - Short to Ground
Fuel Injector, cylinder 4 - Short to Ground

P1240
Injector Circuit, Cylinder 4 - Open
Fuel Injector, cylinder 4 - Interruption

Function
The coil of the fuel injector is supplied on one side with B+ (battery voltage) and on the other with ground via an end-stage of the ECM.
For these faults the connection to ground is monitored.

Diagnostic conditions
A fault is recognized and stored in memory when the engine speed is above 80 1/min and the battery voltage is between 7.5 Volt and 17 Volt.





Wiring Diagram.





Diagnostic procedure.





Check fuel injector.
- Remove connector for injector 4.
- Connect ohmmeter to pin 1 and pin 2 at injector.
- Specified value: 15 - 17 ohms.

Check wiring.
- Check wiring from ECM, pin 32 to fuel injector 4, pin 2 for continuity or short circuit to B+ or ground.