absence of communication with ecu

[lanlee666]

my car, peugeot 207 1.6 petrol. crank not start problem. I believe there is no power to the ecu. I notice the is no power at the f15/30a fuse also. maybe relate to ecu. what is possible sensor that cause the ecu no power. Thanks for any help

[darbuck]

The fuse would cause it to have no power

[wheeler]

Can you get comms/does the engine start if you give the fuse 12v.
Really need a wiring diagram to investigate further.

[lanlee666]

The fuse would cause it to have no power

the fuse itself no power.

[lanlee666]

Can you get comms/does the engine start if you give the fuse 12v.
Really need a wiring diagram to investigate further.

The engine still can crank but still no comm with ecu when I jump 12v to the fuse.

[darbuck]

Ok sorry misunderstood your question there must be either a break in the cabling or possibly the ECU. Have you checked the wiring from the OBD port to the fuse box for continuity. Ideally you need a wiring diagram for this. If you don't have one perhaps ask In a new topic. It's hard to diagnose without knowing your wiring is good.

[lanlee666]

Ok sorry misunderstood your question there must be either a break in the cabling or possibly the ECU. Have you checked the wiring from the OBD port to the fuse box for continuity. Ideally you need a wiring diagram for this. If you don't have one perhaps ask In a new topic. It's hard to diagnose without knowing your wiring is good.

thanks for the reply. I'm still looking for wiring diagram for this car on the net.