temp guage Problems
Thread Starter
Member
Joined: May 2002
Posts: 4,004
Likes: 0
From: Redding, CT, usa
temp guage Problems
Ok heres what happened about 2 months ago i put a sender unit in, and my temp guage woked without any problems then for the past week it hasn't been working again any clue what the problem could be, is it shorting out, getting tripped by something??? please help!!!!!
Trending Topics
Joined: Sep 2002
Posts: 118
Likes: 0
From: san leandro, ca, usa
Re: temp guage Problems (94TealGSR)
hey i was gonna scan you a pic from my 98 integra helms but my computer with the scanner hooked up is conveniently broken right now. so here goes:
gauge test:
1. check the no. 25 (7.5A) fuse in the under-dash fuse/relay box before testing.
2. make sure the ignition switch is OFF, then disconnect the YEL/GRN wire from the ECT gauge sending unit and ground it with a jumper wire.
3. turn the ignition switch ON. check that the pointer of the ECT gauge starts moving toward the H mark.
CAUTION: turn the ignition switch OFF before the pointer reaches the H on the gauge dial. failure to do so may damage the gauge.
*if the pointer of the gauge does not move at all, check for an open in the YEL or YEL/GRN wire. if the wires are OK, replace the ECT gauge.
*if the ECT gauge works, test the ECT sending unit.
ECT sending unit test:
1. disconnect the YEL/GRN wire from the ECT sending unit.
2. with the engine cold, use an ohmeter to measure resistance between the positive terminal and the engine (ground).
3. check the temperature of the coolant.
4. run the engine and measure change in resistance with the engine at operating temperature (the radiator fan comes on).
*if temp = 133, then resistance =137
*if temp = 185-212, then resistance = 46-30
5. if the obtained readings are substantially different from the specifications above, replace the ECT sending unit.
--------remember, this is taken from a 98 manual. dunno if 94 is any different. hope this helps.
gauge test:
1. check the no. 25 (7.5A) fuse in the under-dash fuse/relay box before testing.
2. make sure the ignition switch is OFF, then disconnect the YEL/GRN wire from the ECT gauge sending unit and ground it with a jumper wire.
3. turn the ignition switch ON. check that the pointer of the ECT gauge starts moving toward the H mark.
CAUTION: turn the ignition switch OFF before the pointer reaches the H on the gauge dial. failure to do so may damage the gauge.
*if the pointer of the gauge does not move at all, check for an open in the YEL or YEL/GRN wire. if the wires are OK, replace the ECT gauge.
*if the ECT gauge works, test the ECT sending unit.
ECT sending unit test:
1. disconnect the YEL/GRN wire from the ECT sending unit.
2. with the engine cold, use an ohmeter to measure resistance between the positive terminal and the engine (ground).
3. check the temperature of the coolant.
4. run the engine and measure change in resistance with the engine at operating temperature (the radiator fan comes on).
*if temp = 133, then resistance =137
*if temp = 185-212, then resistance = 46-30
5. if the obtained readings are substantially different from the specifications above, replace the ECT sending unit.
--------remember, this is taken from a 98 manual. dunno if 94 is any different. hope this helps.
Thread
Thread Starter
Forum
Replies
Last Post
Civiclx
Honda Civic / Del Sol (1992 - 2000)
11
Sep 8, 2004 06:55 AM
fourdoorsleeper
Honda Civic / Del Sol (1992 - 2000)
1
Jan 23, 2004 02:59 PM