Heated and cooled seats

Bummer · 08-06-2015, 03:58 AM

Looking at the Service Manual SE section, page SE-45: there is a "Fail Safe" mode. If the system detects for 4 seconds that the thermal electric device sensor is an open circuit, it stops all output and enters the system off mode.

It also mentions a 30 C differential between cushion and back, and temperatures higher than 110 C, but that doesn't seem all that likely in only four or five seconds.

Does either the back or cushion begin to warm up before it stops? Since both have a "TED" (SE-77) I'd start by looking at the one that doesn't begin to warm.

The Bodyman · 08-06-2015, 08:57 AM

Hi Steve.

Just been looking at what you said. Your correct. Its 4 seconds from start to switch off. Nothing get warm on the drivers seat. It doesn't have long enough to get any heat there. You can here the fans start up on low and just before they go onto the next stage, it shuts down.
Would a diagnostic reader find the fault?

I was given this parts number for a the thermo switch in the base: 873D7

Jon

08-06-2015, 03:58 AM	#1 (permalink)
Bummer Premium Member Join Date: Mar 2012 Location: Indianapolis, IN Posts: 303 Drives: 13 370Z RTS SR M6 Rep Power: 51	Looking at the Service Manual SE section, page SE-45: there is a "Fail Safe" mode. If the system detects for 4 seconds that the thermal electric device sensor is an open circuit, it stops all output and enters the system off mode. It also mentions a 30 C differential between cushion and back, and temperatures higher than 110 C, but that doesn't seem all that likely in only four or five seconds. Does either the back or cushion begin to warm up before it stops? Since both have a "TED" (SE-77) I'd start by looking at the one that doesn't begin to warm. The Bodyman likes this. __________________ Steve

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08-06-2015, 08:57 AM	#2 (permalink)
The Bodyman Base Member Join Date: Mar 2015 Location: Oxfordshire Posts: 20 Drives: 370z Roadster Rep Power: 11	Hi Steve. Just been looking at what you said. Your correct. Its 4 seconds from start to switch off. Nothing get warm on the drivers seat. It doesn't have long enough to get any heat there. You can here the fans start up on low and just before they go onto the next stage, it shuts down. Would a diagnostic reader find the fault? I was given this parts number for a the thermo switch in the base: 873D7 Jon