I have error P1560

The description is below.

I've opened all connectors and sprayed CRC 2-26 (cleaner). Doesn't help. Also checked every single fuse both in the engine box and the box next to the steering wheel.

Note that I've just changed the glow plugs. I'm afraid I may have pulled too hard on some of the wiring but I haven't noticed any damage.

Other than that I'm planning to test all the relays. I'm reading about measuring tension on circuits but I don't know what it means / how to do it.

P1560

Definition:

Back-up Voltage Circuit Malfunction

Description:

Battery voltage ≥ 10.9 V. Engine condition - After engine starting. Low voltage condition of back-up power supply.

Cause:

Wiring harness between ECM and ground chassis needs repair.

Poor contact of the ECM connector.

Defective fuse.

Wiring harness between ECM and negative battery terminal needs repair.

What are the actual problem and symptoms of the fault that is showing?

I'm now suspecting it's due to the battery. Alternated between clear and DTCs today. Will test with another battery over time. and post back when it's done.

The short answer to your question is anyways that the car is working fine with the DTCs except the cruise control is deactivated. And of course a car with engine DTC doesn't pass vehicle inspection.