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18th September 2018, 19:04 | #11 | |
SERVICING AND DEALER DIAGNOSTICS
MG ZT CDTI 135 + & MGZT CDTI AUTO 160 & ROVER 75 TOURER CDTI 160 TROPHY YELLOW Join Date: Aug 2013
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Mick
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[SIGPIC][/SIGPIC] T4 Owner Jobs done : new UBP, Spy hole mod, Rear hub(wheel bearing),plenum cleaned and emptied, Inline thermostat fitted,Full service, In car Digital tv/DVD Bluetooth Satnav etc, Replaced UBP, Restored headlights,Fixed airbag connection.replaced HP pump,replaced rear light seals,changed intercooler O rings. Jobs to do: ,replace drivers lock,.[/SIZE] |
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18th September 2018, 22:46 | #12 |
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Yeah well I’ve just had a little look at my fbh. If I leave the blowers on then turn the ignition off and turn the webasto on then the blowers come on when the webasto is turned on. But if I leave my blowers off then turn the webasto on it doesn’t come on.
I do need to order a GSM unit! How easy are they to wire up? |
18th September 2018, 23:41 | #13 |
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Rover 75 CDTi Connoisseur SE & MG ZT Saloon 190 Join Date: Jun 2007
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The FBH will not switch the ATC on if you leave it switched off when you leave the car it just activates it to the setting you left it on when you last exited the car
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19th September 2018, 07:22 | #14 | |||
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75 Contemporary SE Mk II 2004 Man. Sal. CDTi 135ps, FBH on red diesel, WinCE6 DD Join Date: May 2010
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Sorry, but I still cannot see how that can possibly happen, there is no means for the ATC to get a 12v supply for it to do that. Why would anyone go to all the trouble and lengthy discussion of a mod to allow it to operate with the ignition off, if it could already power itself up? There was even a lengthy discussion about how to delay the ATC operation, until the FBH had warmed the coolant enough to impart some heat into the cabin. There was even a short discussion about adding a secondary battery, so that using the FBH plus blower, didn't flatten your main battery. I have had an FBH fitted for 7 years, modified for manual running to pre-heat and not once has the blower ever powered up until the ignition was turned on. All I can suggest is that those suggesting their blowers start, have had the modification done behind the ATC panel.
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Harry How To's and items I offer for free, or just to cover the cost of my expenses... http://www.the75andztclub.co.uk/foru...40#post1764540 Fix a poor handbrake; DIY ABS diagnostic unit; Loan of the spanner needed to change the CDT belts; free OBD diagnostics +MAF; Correct Bosch MAF cheap; DVB-T install in an ex-hi-line system; DD install with a HK amp; FBH servicing. I've taken a vow of poverty. To annoy me, send money. |
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19th September 2018, 13:16 | #15 | |||
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I've never seen any extra "mod" wiring in my car, although it may be hidden behind the ATC.
From my user manual (facelift) : Quote:
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Therefore, the difference must be the options fitted to the factory car - early cars all have a FBH fitted to aid in warming the engine. The cost option was to have the parking heater which gives the extra timer, remote control and interior warming facilities over a standard FBH only arrangement. Last edited by first-things-first; 19th September 2018 at 17:00.. |
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19th September 2018, 14:07 | #16 |
I really should get out more.......
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Wiring diagram attached for the original factory install parking heater which runs with the engine off and will pre-heat the cabin for you and defrost the windscreen for up to 30 mins either by remote function or via the timer programmer in the armrest.
I have converted three vehicles in the past to parking heater following the manufacturers wiring and using the official components on each install, 1x75 and 2xFreelanders. No matter how many times I have studied the official wiring diagram it does not make sense to me if you follow the relays. So I would treat the relay wiring with some suspicion, all I can say is that 99% of the diagrams are correct, but little errors occurs now and again, but on the whole they are excellent. I would check fuse 37 (passenger compartment) first. Then with the FBH running and up to temperature you should eventually get a 12v reading from the black/yellow wire at the FBH connector CO925-4. Or follow the black/yellow wire into the passenger Cmpt relays for the parking heater and check for 12v present there. If you have 12v then you will need to check both relays function which are located in the passenger footwell. If the blower does not switch on the FBH will start shutting down as the heat is not being dispersed from the coolant system. This will also occur if the water pump on the side of the FBH is not functioning as ther is literally no heat soak occurring. Another area to check depending upon if this was an original factory install or retrofit from Webasto or the owner then there maybe a number of diodes (can’t recall how many, perhaps 4?) run behind the heater ECU panel that may have failed and not allowing the heater panel to power up. Last edited by Lovel; 19th September 2018 at 14:26.. |
19th September 2018, 18:58 | #17 |
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A simpler wiring diagram for bringing the ATC on after 5 minutes is below in the GSM "how to" , with the second relay of the GSM programmed to switch on 5 minutes after relay 1, so relay 1 starts the FBH in parking heater mode and relay 2 delays for 5 minutes before switching on the ATC
https://www.the75andztclub.co.uk/for...d.php?t=231637
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www.midlandsnanomeets.co.uk Robs Car Gallery Coven near Wolverhampton WV9 2000 Cowley Built Rover 75 2.0 V6 Club SE/ Atlantic Blue/ Sandstone/Walnut (daily driver) 2003 Land Rover Freelander 1 TD4 HSE Helsinki Blue/Black Leather (swmbo daily driver) |
19th September 2018, 19:24 | #18 | |
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CORRECT Aftermarket controlling. The wires from the ATC are severed, then a DPDT relay is connected to act as a relay, timer and a diode, so when 12v is sent to the blower motor from the FBH via the DPDT, 12v does not feed back to the IGN. A timer relay is also installed for user to select ATC on/off times. GSM modules and relays have developed and improved significantly, and about perfected since this thread was posted. https://www.the75andztclub.co.uk/for...d.php?t=231637
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If at first you don't succeed, hide the evidence Last edited by Devilish; 19th September 2018 at 20:20.. |
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19th September 2018, 19:50 | #19 | |
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Webasto controller equipment costing more than a 75 or Freelander is worth/cost puts people off (me anyways). Aftermarket controlling does the same job, but the fobs cost £5. I have seen several with Webasto controlled FBH, all down to what the user wants to pay for. When I did SWMBO's Freeelander I thought of Webasto controller, until I saw the price. Yeh right.
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If at first you don't succeed, hide the evidence Last edited by Devilish; 19th September 2018 at 20:17.. |
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19th September 2018, 20:00 | #20 | |
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Depends upon the controller you have and how it is connected. The blowers switching on the same time as the FBH is a waste because it takes at least 5 mins for the FBH to ramp up and run long enough to pass warmer water to the heater matrix. 15 mins after running it should shut down really, or on demand. This is one way it should be done, if it works the way the use wants job done.
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If at first you don't succeed, hide the evidence Last edited by Devilish; 19th September 2018 at 20:19.. |
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