Technical 2013 X250 Fuse Box Connectors etc

[Murrayxxx77]

Hi All,
Trying to diagnose a non-functioning main engine fan.
The fan functions with 12v applied, relay T06 functions okay, temperature sender is good but no signal from ECU to fan relay T06 when temperature sender on thermostat is shorted out.
I suspect broken cable so ....
I want to check wiring between Pin 69 on ECU connector B ... and ... Pin 28 on B001 (Fuse Box) or pin/socket 85 on T06 relay.
I can remove ECU connector but how do I access rear of fuse box where connectors are ? I can see two black tabs which I can release but grey relay/fuse panel only moves a bit up. Do I have to slacken anything to access rear and connectors ?
Also, various diagrams have this wire colour as 'HM' (grey/green?) but that doesn't appear to be a normal Fiat wire colour. Can anybody confirm this correct ?
Thanks
Murray

 

[MSjoberg]

H=grey, M=brown

 

[Communicator]

Hi All,
Trying to diagnose a non-functioning main engine fan.
The fan functions with 12v applied, relay T06 functions okay, temperature sender is good but no signal from ECU to fan relay T06 when temperature sender on thermostat is shorted out.
I suspect broken cable so ....
I want to check wiring between Pin 69 on ECU connector B ... and ... Pin 28 on B001 (Fuse Box) or pin/socket 85 on T06 relay.
I can remove ECU connector but how do I access rear of fuse box where connectors are ? I can see two black tabs which I can release but grey relay/fuse panel only moves a bit up. Do I have to slacken anything to access rear and connectors ?
Also, various diagrams have this wire colour as 'HM' (grey/green?) but that doesn't appear to be a normal Fiat wire colour. Can anybody confirm this correct ?
Thanks
Murray

The temperature sensor is just that, a sensor with a variable output (resistance), which falls as the temperature rises. Shorting the sensor could conceivably cause the ECU to decide that the sensor was faulty.

To answer your question, first disconnect the starter battery, after allowing the system time to shutdown. Next remove the main positive supply cable that terminates on the M6 stud. This allows more movement. As you state the relay/fuse board has two plastic clips, but also has plastic hinges at the opposite side. If I rember correctly the hinges can be slid out of engagement allowing the board to be raised.

I see that @MSjoberg has kindly corrected your colour decoding, but I will attach my own translation sheet.

Please what is engine size 2.3, or 3 lirtre? 2.2 has different make of ECU, and connector arrangement.

 

[Murrayxxx77]

The temperature sensor is just that, a sensor with a variable output (resistance), which falls as the temperature rises. Shorting the sensor could conceivably cause the ECU to decide that the sensor was faulty.

To answer your question, first disconnect the starter battery, after allowing the system time to shutdown. Next remove the main positive supply cable that terminates on the M6 stud. This allows more movement. As you state the relay/fuse board has two plastic clips, but also has plastic hinges at the opposite side. If I rember correctly the hinges can be slid out of engagement allowing the board to be raised.

I see that @MSjoberg has kindly corrected your colour decoding, but I will attach my own translation sheet.

Please what is engine size 2.3, or 3 lirtre? 2.2 has different make of ECU, and connector arrangement.

Engine is 2.3L 150 Multijet. I was slightly confused by the wiring diagram as 'HM' doesn't seem to be a 'standard' Fiat two colour wire i.e. not listed on the translation sheet.