endless551

Hi! My exhaust temp warning light came on even though on a cold morning. Suspected faulty sensor but don't know where it is located. Is it ok to continue driving with the warning ON? Will the fuelling be altered or timing retarded?? Pls advice.

RETed

It's under the passenger seat.


-Ted

endless551

same for my RHD model?? The warning light just went off.... sigh... I've removed my air pump... and not running with cat or anything. Do I still need that sensor?

NZConvertible

That's warning of an overheated cat. This can be caused by various problems like incorrect ignition timing and mixtures, but is most likely because the cat is blocked due to old age. Unless the cat is relatively new, replace or remove it.

Note that US models actually have a temp switch on the floor directly above the cat, while Japanese models have a temp switch in the cat itself. You'll need to have a look at the cat to see which type you have.

endless551

I don't have a cat and mine is a japanese model. Running on a 3in system and car is a little old.. my concern is only with that warning light on, will my ig timing be retarded or so for safety purposes or its just a WARNING, which I will ignore cos I know my A/F ratio is alright.

NZConvertible

Sorry, I missed your post about not having a cat.

The exhaust temp warning does have an input to the ECU but all it does is open the split air solenoid on the ACV to dump more air from the air pump into the exhaust to try to cool the cat.

Japanese models have a 2-core wire that runs through a grommet in the floor to the temp switch in the side of the cat. Usually when the cat is removed the wire is just cut off at the floor. Unlike the normally-open floor temp switch used on US models, the cat temp switch on Japanese models is normally-closed. To stop the warning light coming on when the cat's removed you need to join the two cores in the wire together to complete the circuit. You might have a loose connection at those wires, causing the light to come on.

When my cat was removed the warning light was on constantly because the wire had just been cut off. What I did was to remove the passenger (left side) seat, lift the carpet and find where the wire runs through the floor. I pulled it out and followed it back to a connector. I unplugged the connector, made a jumper wire and plugged it into harness side to complete the circuit. Problem solved.

endless551

Reted and NZConvertible, u 2 guys are awesome! Save me from searching through my manual to locate the bugger.. Hahaha.. Not being lazy but needed a quick answer while in the office.. Rock on guys!