WIP: Diagnostic Mode - Updated, Clarified and Simplified - Page 4

Jules · 19th December 2014, 16:44

Midscale only means it's 73 deg C or above.
Once it gets to 116 deg C the needle will suddenly jump up to max and overtemp red Led will illuminate

That's how the gauge is designed.
Possibly so the driver will suddenly notice it.
Pants design if you ask me :xmas-smiley-024:

klarzy · 19th December 2014, 16:47

I have Torque on my ZT CDTI and this gets to 76C and stays there (last month)...

Jules · 19th December 2014, 16:51

12 degrees too cool in that case and it will be costing you in performance and fuel .
Get the stat done :xmas-smiley-024:

SD1too · 20th December 2014, 08:45

Quote:

Originally Posted by Jules

Midscale only means it's 73 deg C or above.

I think your finger slipped on the keyboard Jules.

Just so that everyone is clear on this, it's 75° C as T-Cut confirmed a couple of posts ago. Thanks.

Simon

Fifer · 30th May 2015, 22:51

After reading some of the threads in the forum I was beginning to wonder about the condition of the cooling system and fan on my car, and subsequently found this thread.

Firstly, a big thank you to TC for providing such a detailed documentation on the diagnostics. It's great to know that so much information is available, once you know how.

I was concerned to read that the temperature gauge sits at the nine o'clock position irrespective of the temperature from 75°C upwards. It had lulled me into a sense of false security till I read that, as mine climbs from cold to the nine o'clock position and doesn't move. It does not appear to be of much use at all.

Quote:

Once it gets to 116 deg C the needle will suddenly jump up to max and overtemp red Led will illuminate.

Thanks also to Jules for the above. Mine hasn't done that yet. (Breathes a sigh of relief!)

I'd have hit the thanks button, but there isn't one on my screen.

Jim

(There is one now, so thanks to whoever fixed it.)

Wayne2015 · 13th July 2015, 06:53

Quote:

Originally Posted by SD1too

I think your finger slipped on the keyboard Jules.

Just so that everyone is clear on this, it's 75° C as T-Cut confirmed a couple of posts ago. Thanks.

Simon

Brilliant thread here thanks to member Versus pointing it out to me

Can I ask:
7 coolant / engine temp
(A) is this just for coolant (no temp reading for engine oil)?
(B) what temps should I be looking out for?
(C) have this displayed whilst driving I assume?

9 battery
(A) what voltage should I be looking out for?

Thanks

pm77 · 13th July 2015, 08:30

Quote:

Originally Posted by Wayne2015

9 battery
(A) what voltage should I be looking out for?

Thanks

About 12V with the ignition on but engine not running, 14.0-14.2V with the engine running.

Can't answer about the temp as I have a diesel

SD1too · 13th July 2015, 09:04

Quote:

Originally Posted by Wayne2015

Can I ask:
7 coolant / engine temp
(A) is this just for coolant (no temp reading for engine oil)?
(B) what temps should I be looking out for?
(C) have this displayed whilst driving I assume?

(A) Yes (correct).
(B) During forward motion low to mid-nineties. Creeps up to 100° when stationary and slow speed fan should then reduce it to 96°.
(C) You can, yes.

Simon

T-Cut · 13th July 2015, 10:14

Quote:

Originally Posted by Wayne2015

Can I ask:
(C) have this displayed whilst driving I assume?

It's covered in Step a) and a2) in the Guide.

TC

pm77 · 13th July 2015, 11:06

Quote:

Originally Posted by Jules

Midscale only means it's 73 deg C or above.
Once it gets to 116 deg C the needle will suddenly jump up to max and overtemp red Led will illuminate

That's how the gauge is designed.
Possibly so the driver will suddenly notice it.
Pants design if you ask me :xmas-smiley-024:

On my diesel this wasn't quite the same.

I had an airlock causing my diesel to overheat a mile from work. I noticed as the heater was freezing cold, so activated the ipk display. At 105° the needle went to roughly 47 mins past (ie just over 9 'o' clock) then went to about 8 mins to 12 just as I arrived at work when the display read 120°

. My fan is obviously kaput but it didn't illuminate the warning light. Air lock now sorted and now saving for a new fan.

19th December 2014, 16:44	#31
Jules This is my second home ZT 260 SE Twilight and 10 other 75 ZT's :O Join Date: Jan 2007 Location: Conwy NORTH WALES Posts: 11,094 Thanks: 512 Thanked 1,116 Times in 763 Posts	Midscale only means it's 73 deg C or above. Once it gets to 116 deg C the needle will suddenly jump up to max and overtemp red Led will illuminate That's how the gauge is designed. Possibly so the driver will suddenly notice it. Pants design if you ask me :xmas-smiley-024: __________________ [SIGPIC][/SIGPIC] Newbies do now!! 1. Plenum drains..all 3 or 4 year dependent 2. Cooling fan..All speeds functioning 3. Bonnet cable divider block

19th December 2014, 16:47	#32
klarzy This is my second home none but not gone Join Date: Mar 2013 Location: March, Cambs Posts: 16,437 Thanks: 894 Thanked 4,247 Times in 3,025 Posts	I have Torque on my ZT CDTI and this gets to 76C and stays there (last month)... __________________ [SIGPIC][/SIGPIC]….All praise Bananaswan….

19th December 2014, 16:51	#33
Jules This is my second home ZT 260 SE Twilight and 10 other 75 ZT's :O Join Date: Jan 2007 Location: Conwy NORTH WALES Posts: 11,094 Thanks: 512 Thanked 1,116 Times in 763 Posts	12 degrees too cool in that case and it will be costing you in performance and fuel . Get the stat done :xmas-smiley-024: __________________ [SIGPIC][/SIGPIC] Newbies do now!! 1. Plenum drains..all 3 or 4 year dependent 2. Cooling fan..All speeds functioning 3. Bonnet cable divider block