Low voltage all injectors

Volvo S40 2.0d 2006. Voltage at injectors is 1.5v and should be at least 12v.
ECU has been tested and is ok.
Wiring between ECU and injectors all ok. Injector connectors replaced.
Maybe voltage supply to ECU injector circuit low. ECU pin number for injector driver circuit?

I realize that this thread is a month old. But, if you are still having problems, power for the injectors comes from a 10 amp fuse (F32), in the engine compartment fuse box, (left side).

All fuses ok. Voltages checked on supply to ECU and all ECU earth's have been redone. If all faults are clear and the ignition switched on, the voltages at the injectors are 1.55V before attempting to start. As soon as the start is attempted codes P1201, P1202, P1203 and P1204 are back.
So, any fault that is causing the low voltage of 1,5v is present before the engine is started.

Chad wrote:

I realize that this thread is a month old. But, if you are still having problems, power for the injectors comes from a 10 amp fuse (F32), in the engine compartment fuse box, (left side).

Does the fuse Chad referred you to light an incandescent test lamp on both poles?

As Noah suggested, illuminate an incandescent test-light by touching the test-light to BOTH test points of the fuse (one at a time). Now, check the voltage. Is it, still, battery voltage? Or did the voltage drop? You should be able to light an incandescent test-light anywhere along the yellow highlighted circuit, and voltage should not drop below battery voltage.


Engine Control Schematics


You can, also, pull the fuse. With the fuse pulled, one side of the fuse socket should have battery voltage. The other side should NOT have battery voltage. Use an ohm meter to touch the side of the socket that does NOT have battery voltage with one test-lead, and use the other test-lead to touch the power side of an injector connector. You should read less than 4Ω of resistance.