Test results
1
COMPONENT CONCERNED
SDU CONTROL UNIT CONDITION CHECK
OK (NO FAULTS DETECTED)
FAULT DETECTED
OPERATION
SDU control unit
Check that the control unit is not damaged, and that has no bent or broken pins
Go to Step 2
Damaged control unit
Replace the LPG supply system control unit
Op. 1057B80 GPL INJECTION SYSTEM CONTROL UNIT R R
2
LPG INJECTOR WIRING CHECK
Wiring from LPG injector to SDU
Disconnect the SDU from the vehicle wiring (both connectors). Use a multimeter to check the correct continuity in the wiring between injector and SDU
Go to Step 3
Presence of breaks
Restore the correct connections
3
LPG INJECTOR CHECK
Injector
Use a multimeter in ohmmeter mode to check that the resistance value between pin 73 and pin 80 is between 1 ohm and 1.4 ohm
Go to Step 4
Resistance value out of the tolerance range
Change the injectors
Op. 1057B66 GPL INJECTOR UNIT WITH CONNECTION PIPES TO PRESSURE REGULATOR R R
4
CONTINUITY CHECK
Use a multimeter to check the correct continuity between the following pins of the SDU:
- Pin 72 and pin 28
- Pin 72 and pin 27
- Pin 79 and pin 28
- Pin 79 and pin 27
- Pin 80 and pin 28
- Pin 73 and pin 28
- Pin 73 and pin 27
- Pin 66 and pin 28
- Pin 66 and pin 27
- Pin 59 and pin 28
- Pin 59 and pin 27
- Pin 58 and pin 28
- Pin 58 and pin 27
- Pins 65 and 28
- Pin 65 and pin 27
End of diagnosis
Incorrect continuity between the pins