davec73
SCCoA Member
Hey guys I have had the same problem with my high speed fan not coming on since I put the engine in the car which really holds me back from driving it.
Here is what I have done to diagnose it:
1. tested the fan to ensure it works at the connector
2. Jumped the wire at the IRCM to ensure the wiring is good
3. Replaced the IRCM
4. Replaced ECT sensor
I do not have an IRCM tester so I don't know if the one I replaced the original with is any good but the low speed fan comes on as it should. When I get the car out on the highway when it is hot out and beat on it to were it goes above the heat range of the low speed fan settings the car starts to heat up and the high speed fan will not come on. The settings in be are on at 198 off at 190 and I moved the high speed settings to 254 to make the low speed stay on at all times. All I can think of is that I may have an issue with the EEC not commanding the fan to come on because it is bad. If anyone has an IRCM tester that I could borrow or buy please let me know as it would allow me to eliminate that and narrow it down to the EEC as the definite cause.
Here is what I have done to diagnose it:
1. tested the fan to ensure it works at the connector
2. Jumped the wire at the IRCM to ensure the wiring is good
3. Replaced the IRCM
4. Replaced ECT sensor
I do not have an IRCM tester so I don't know if the one I replaced the original with is any good but the low speed fan comes on as it should. When I get the car out on the highway when it is hot out and beat on it to were it goes above the heat range of the low speed fan settings the car starts to heat up and the high speed fan will not come on. The settings in be are on at 198 off at 190 and I moved the high speed settings to 254 to make the low speed stay on at all times. All I can think of is that I may have an issue with the EEC not commanding the fan to come on because it is bad. If anyone has an IRCM tester that I could borrow or buy please let me know as it would allow me to eliminate that and narrow it down to the EEC as the definite cause.