LED Gauges not working
Thread Starter
4th Gear
Joined: Aug 2011
Posts: 4
Likes: 0
From: Clermont Florida
LED Gauges not working
Hi,
My LED gauges are not working and I have to have the AC on to have cooling fans run. I have checked the three cooling fan relay's but think it's ECM related. Analog ga. work ok and car drives fine, any thoughts would help, Thanks
My LED gauges are not working and I have to have the AC on to have cooling fans run. I have checked the three cooling fan relay's but think it's ECM related. Analog ga. work ok and car drives fine, any thoughts would help, Thanks
Thread Starter
4th Gear
Joined: Aug 2011
Posts: 4
Likes: 0
From: Clermont Florida
I have replaced the ECM and still no luck, scan tool will not connect and led gauges all ay 0. Cooling Fans only work with AC. I think the two issues are related. I have read that the CCM communicates with the ECM and the ECM toggles ground to open or close relays. I will start again checking relays. does anybody have info on CCM. Thank You
Le Mans Master
Joined: Jan 2002
Posts: 5,556
Likes: 0
From: Jenison MI
Cruise-In VI Veteran
Cruise-In VII Veteran
St. Jude Donor '06
I have replaced the ECM and still no luck, scan tool will not connect and led gauges all ay 0. Cooling Fans only work with AC. I think the two issues are related. I have read that the CCM communicates with the ECM and the ECM toggles ground to open or close relays. I will start again checking relays. does anybody have info on CCM. Thank You
Le Mans Master
Joined: Jan 2006
Posts: 5,620
Likes: 206
From: Orlando FL
The LED display is driven by the CCM. It could be the problem or the instrument panel itself. There also could be a bad connection at a connector in either place.
I would not look to the PCM as being the display problem. A set of FSM books would be a great asset for this problem.
You cant check the codes using the on board stuff and will need an external scanner (or Tech 1) for OBD1 with a OBD2 connector. This would give you an indication if you can communicate with the CCM.
I would check all the fuses just to make sure.
