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Temperature Gauge


SteveLS400
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Hi

For those that follow the LS400 sub forum, this will be familiar.

The engine temp gauge packed in for no apparent reason. The gauge works when shorted. Its had 4 new sensors. Ive even removed the plug fron the wire and soldered the wire directly to the sender. It worked in a fashion for a month or so, and now nothing again.

In a desperate plea for help, can anyone throw any light on this problem. Car has never overheated but I cringe in jams. The full details are here:-

http://www.lexusownersclub.co.uk/forum/index.php?showtopic=61124

Thanks

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is it not worth trying to find one in a scrapyard and ripping out as much of the system as possible ie senders and loom,maybe dash to replace yours with - or even try a sender off another car with similar fittings to try to give you some sort of temp display

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Hi

For those that follow the LS400 sub forum, this will be familiar.

The engine temp gauge packed in for no apparent reason. The gauge works when shorted. Its had 4 new sensors. Ive even removed the plug fron the wire and soldered the wire directly to the sender. It worked in a fashion for a month or so, and now nothing again.

In a desperate plea for help, can anyone throw any light on this problem. Car has never overheated but I cringe in jams. The full details are here:-

http://www.lexusownersclub.co.uk/forum/index.php?showtopic=61124

Thanks

Mine's a'94 so this may not apply but the manual show another test.

1 Disconnect the connector from the GAUGE

2 turn on ignition gauge should read cool.

3 ground SAME CONNECTOR through a 3.4watt bulb

4 switch ignition on, check bulb lights and needle moves toward hot.

If not right measure the resistance on the 3 terminals on the gauge,B at 12 o'clock,A at 7 oclock

C at 4'oclock

connect A-B approx 54 ohms

A-C approx 146 ohms

B-c approx 200 ohms

If values not right change the gauge

Worth a look, have no info except parts list for '95

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