P0480
01-01-2015, 02:53 PM
#1
New Member
Thread Starter
Join Date: 01-01-2015
Location: Buffalo NY
Posts: 12
P0480
2006 2.2
Have P0480 code. Fans not working .If I ground pin 87 on the fan relay ,fan starts right up. I have good continuity on the dark green wire from pin 87 on the relay to pin 47 on the ECM. I replaced the ECM with a used one from Flashmasters on EBay but same thing . I'm thinking could be another bad ECM.
Any ideas ? Thanks
Coolant temp sensor is good
Have P0480 code. Fans not working .If I ground pin 87 on the fan relay ,fan starts right up. I have good continuity on the dark green wire from pin 87 on the relay to pin 47 on the ECM. I replaced the ECM with a used one from Flashmasters on EBay but same thing . I'm thinking could be another bad ECM.
Any ideas ? Thanks
Coolant temp sensor is good
Last edited by hpp700; 01-01-2015 at 03:06 PM. Reason: Additional info
01-01-2015, 05:22 PM
#2
Technical Moderator
Join Date: 01-23-2009
Location: Fredericksburg, Virginia
Posts: 24,688
The relay bad? The ground (driver side radiator support).
Read this: P0480 Cooling Fan Relay 1 Control Circuit
The ECM provides the ground, it is grounded at the radiator support.
Sounds more like the relay is bad to me. I don't remember the relay codes in my condition at the moment, but they are not a secret (all relays have the same numbers on the pins).
Read this: P0480 Cooling Fan Relay 1 Control Circuit
The ECM provides the ground, it is grounded at the radiator support.
Sounds more like the relay is bad to me. I don't remember the relay codes in my condition at the moment, but they are not a secret (all relays have the same numbers on the pins).
01-01-2015, 06:45 PM
#3
New Member
Thread Starter
Join Date: 01-01-2015
Location: Buffalo NY
Posts: 12
I've substituted the crank relay for the fan relay and it starts. (same relay number) also put 12 volts across the relay coil and it completes the pickup of the output contactors with good continuity .
01-02-2015, 04:36 PM
#5
New Member
Thread Starter
Join Date: 01-01-2015
Location: Buffalo NY
Posts: 12
Relay is good
I also replaced it with a new relay and still no fan
I have +12 v on pins 87 and 86
Pin 30 is connected to blue fan wire
Pin 85 is connected to pin 47 on the ECM
Thanks for your response
I also replaced it with a new relay and still no fan
I have +12 v on pins 87 and 86
Pin 30 is connected to blue fan wire
Pin 85 is connected to pin 47 on the ECM
Thanks for your response
01-02-2015, 05:15 PM
#7
Technical Moderator
Join Date: 01-23-2009
Location: Fredericksburg, Virginia
Posts: 24,688
01-02-2015, 05:28 PM
#8
Platinum Member
Join Date: 12-06-2009
Location: Alabama
Posts: 11,094
donbrew. I had to reread it too. I think it means he took the questionable fan relay and put it in the crank relays place.
Since it started(cranked), I'm assuming he's saying the fan relay is good.
I'm with you on your post above to check the ground. I posted that picture of the ground circuit to give him an "incentive" to check it out.
The picture I posted is from a 2008 service manual. The OP's being a 2006, I don't know if the ground point is the same.
Since it started(cranked), I'm assuming he's saying the fan relay is good.
I'm with you on your post above to check the ground. I posted that picture of the ground circuit to give him an "incentive" to check it out.
The picture I posted is from a 2008 service manual. The OP's being a 2006, I don't know if the ground point is the same.
01-02-2015, 06:40 PM
#10
New Member
Thread Starter
Join Date: 01-01-2015
Location: Buffalo NY
Posts: 12
I' m checking the ground
I appreciate your detailed explanation of the connections.
I can put +12 v on the blue wire to the fan and it runs - does that mean ground is good or could ground to ECM be open ?
Thanks for your help !
I appreciate your detailed explanation of the connections.
I can put +12 v on the blue wire to the fan and it runs - does that mean ground is good or could ground to ECM be open ?
Thanks for your help !