94 Disco, Code 14, Coolant Thermistor

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Author Message   Lance (Lsm) New Member Username: Lsm Post Number: 2 Registered: 04-2003 Posted on Tuesday, August 19, 2003 - 08:25 am:    I don't have a manual so I am hoping that someone who does will look up the procedure for testing the coolant thermistor and post it for me. Thanks for helping. Lance   Shaun Power (Shaunp) Member Username: Shaunp Post Number: 143 Registered: 05-2003 Posted on Thursday, August 21, 2003 - 06:39 am:    Test with a multi meter as follows 14 deg F = 9100-9300ohm 32 = 5700-5900 68 =2400 -2600 104 = 1100-1300 140 = 500-700 176 = 300-400 212 = 150-200   Lance (Lsm) New Member Username: Lsm Post Number: 3 Registered: 04-2003 Posted on Thursday, August 21, 2003 - 11:06 am:    Shaun- Thanks for posting the resistance info. I just read 3520 ohms at around 75-80 deg.F so I'm high. Do you know what the tolerance is? Any advice? Thanks- Lance   Lance (Lsm) New Member Username: Lsm Post Number: 4 Registered: 04-2003 Posted on Thursday, August 21, 2003 - 12:11 pm:    Shaun- The reading was actually 1760 ohms, so I'm in the ballpark. My next question is, I need the presribed test to be sure that the ECU and Coolant Thermistor are communicating. If you could post that I'd be grateful. Thanks Very Much Lance   Shaun Power (Shaunp) Member Username: Shaunp Post Number: 147 Registered: 05-2003 Posted on Thursday, August 21, 2003 - 06:36 pm:    Disconnect connector from ECU and measure between pin 25 and 7 use data above. When checking at ecu connector always do it on the back side not the ecu side or you may damage the pins.   Shaun Power (Shaunp) Member Username: Shaunp Post Number: 148 Registered: 05-2003 Posted on Thursday, August 21, 2003 - 06:53 pm:    Lance you need to test the sensor through the whole range. If you can't find the fault I bet you have stuck open thermostat. Does it idle fast?   Lance (Lsm) New Member Username: Lsm Post Number: 5 Registered: 04-2003 Posted on Thursday, August 21, 2003 - 08:02 pm:    Shaun- I tested the sensor at a range of temps and it seems fine. The thermostat is new and the truck doesn't idle fast. Actually, it's running fine except for an occasional rough idle after a hot start and that evens out after a minute or so. Any more ideas?   Shaun Power (Shaunp) Member Username: Shaunp Post Number: 149 Registered: 05-2003 Posted on Friday, August 22, 2003 - 03:18 pm:    Hot start flooding is probably due fuel temp sensor, check it in the same way. Also injectors may be leaking and causing flooding.