Temp Gauge Check with Multiecuscan. - Alfa Romeo Forum
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Temp Gauge Check with Multiecuscan.

For information:-
Yesterday I connected Multiecuscan to my 156 for the first time, I wanted to check the coolant temperature gauge.
Rising, the gauge was 5deg behind Multiecuscan.
The fan kicked in at 97.5deg (Multiecuscan).
Descending, both showed the same value.
So now I know what I know.
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I've also checked the temperature with Multiecuscan (following a cylinder head repair), it was always below the gauge until it got to 90. After this, the gauge stays on 90 C and multiecuscan continues to raise until 93 C (turned of the engine).

From what I've found on the forum, this gauge behavior is not alarming.

Can anyone tell me at what temperatures does the ECU sends the signal for the 1st and 2nd stage fan on the 147 1.9jtd 16V.
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for the 147 GTA (guess it's the same for the rest based on CAN, ie 147, gt, ..)

thermostat opens at 88 degr. C +/- 2 degr.
Switchpoint speed 1: 95 C
Switchpoint speed 2: 102 C

At temp approx 50 C first part of scale.
Temp from 50 to 80 C linear movement.
Temp between 80 en 100 C (normal) pointer remains at middle scale.
Temp between 100 tot 120 C (upwards) and between 115 tot 100 (downwards) pointer moves linear (between middle of scale and start of red area).
Temp of T = 120 1 C, pointer at start of red area
Temp of T = 122 C pointer at start of red area, and ECU lights up indicator bulb underneath scale (t = 1s); simultaneously lamp for 'too high water temperature is lit
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Thanks for the very clarifying and complete reply!
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Just some tests in this afternoon:

- thermostat opened at 86,1 C
- 1st stage fan at 97 C
- 2nd stage didn't try
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The gauge on the 147 and 156 are different, especially for the Jtd versions.
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check , gauge , multiecuscan , temp

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