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roger68

Member

• Jan 26, 2015

• #1

Hi all 2001 p38 diesel just looked at coolant sensors ive go a blue brown and black one I know what the last two do but should it have a green one for the ecu instead of a blue one thanks

 

wammers

No longer with us, RIP

Donater

• Jan 26, 2015

• #2

roger68 said:

Hi all 2001 p38 diesel just looked at coolant sensors ive go a blue brown and black one I know what the last two do but should it have a green one for the ecu instead of a blue one thanks

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First one on head near injection pump should be blue two wire or in some cases brown one wire dash gauge sensor. Next one should be Green two wire engine ECU sensor. Last one nearest bulkhead should be black two wire Aircon fan sensor. If you have a blue or brown sensor where green one should be you will be having problems.

 

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roger68

Member

• Jan 26, 2015

• #3

just looked has got green one in middle think it might be goosed had it on diagnostics showed 44 c when engine is cold

 

wammers

No longer with us, RIP

Donater

• Jan 26, 2015

• #4

roger68 said:

just looked has got green one in middle think it might be goosed had it on diagnostics showed 44 c when engine is cold

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Default used by ECU if sensor is knackered is supposed to be 50 c so it's not a long way from that. Try it first thing in morning before start up should be around same as temp on Hevac unit.

 

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Gazza36

Active Member

• Jan 27, 2015

• #5

If diagnostics showed a decrease in voltage as the temperature increased does that mean the sensor is ok?

 

Datatek

Well-Known Member

• Jan 27, 2015

• #6

Gazza36 said:

If diagnostics showed a decrease in voltage as the temperature increased does that mean the sensor is ok?

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Maybe, maybe not, depends on the actual resistance change relative to temperature.

 

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Gazza36

Active Member

• Jan 27, 2015

• #7

As the temperature increased, there was a drop in the field showing temperature (v), also the fuel level and accelerator pedal were all over the place, it was a snapon machine.

 

wammers

No longer with us, RIP

Donater

• Jan 27, 2015

• #8

Gazza36 said:

As the temperature increased, there was a drop in the field showing temperature (v), also the fuel level and accelerator pedal were all over the place, it was a snapon machine.

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Proper diag may help.

 

Grrrrrr

Technician, Bodgit & Scarper Ltd

Full Member

• Jan 27, 2015

• #9

I think there was a member in St. Austell who was planning on buying a Nanocom. Cannot remember his name though.